Loading ...
Global Do...
News & Politics
7
0
Try Now
Log In
Pricing
Website: www.deltahealth1.com April-May,2010 Issue-2 Vol -10 Pages-16 Rs 75 dw_2000@rediffmail.com From the pen of Our Guest EDITOR-IN-CHIEF Prof. (Dr.) N. Sridhar Shetty Profession of Dentistry in India have witnessed remarkable progress and occupied important place in the health care system. The patient care for the health of a prime organ of the human body stomatognathic system is more recent in form. Service rendered, the mode of treatme nt and care by the knowle dgeable and skillful professi onals are update and at international status. The profession is supervised and guided with vision and policies by the governments, universities and in particular apex body Dental Council of India (DCI). However to maintain and to excel the present status, teaching institutions have to focus specially: ? On establishment of teaching clinics of the institutions at International protocol by providing time to time updated equipments (ergonomics), instruments and updated treatment methodologies. ? The arrangement of clinical equipments for practice of four handed dentistry, judicious cross infection control and hospital waste management. ? Introduction of interdisciplinary clinical departments for managing recent specialized approaches for management of patients.(Implantology, Craniofacial Surgery, Esthetic Dentistry, etc) ? The restorative laboratories should be updated time to time for utilization of recent developed restorative materials and technology. ? The research center as a separate department has to be established with total support of funds and facilities for research at higher standards. Statute body (A licensing authority) should guard the interest of general public in the oral and dental health care and should formulate a legal inspection protocol for control of oral and dental health care practice to aid the professionals to meet the requirements of ethics and law. With the co-operation of dental schools they should formulate a protocol for the quality treatment and conduct a frequent joint supervision and guidance all throughout their practice. Para dental courses have to be controlled, and conducted appropriately at dental teaching institutions only. The curriculum and training methods should be updated to the degree level to meet the present technology in all restorative procedures. Likewise Dental hygienist/Dental Assistants programme should be updated to graduate level to meet the present day patient care and clinical assisting. The separate para dental courses to be started either in dental colleges/ engineering colleges with association of dental equipment manufacturers in training qualified dental equipment maintenance engineer. Policies, Research and progress in last 6 decades has focused on producing quality clinicians at graduate, post graduate and at doctorate level. Thus it has given a special status to the profession by Contd. On page no 2 Editorial Board Prof. (Dr) Aruna Bhat Professor(Dr) N. Sridhar Shetty Editor-in-Chief Prof. (Dr) Pushparaj Shetty Prof. (Dr) Deepak Pai Prof.(Dr) Vinaya Bhat FIT AND INSERTION OF COMPLETE DENTURE PROSTHESIS IN ONE DAY AT CAMP SITE A UNIQUE COMMUNITY TREATMENT P R O G R A M M E - S I N G L E D AY COMPLETE DENTURE The Stomatognathic system is a prime organ of the human body, with vital functions such as respiration, mastication, speech, appearance and psychological comfort. Ingestion, mastication, deglutition and nutrition formulate the vital chain that is a basis to human existence The jaws carrying the teeth in coordination with other structures of the Stomatognathic System are handicapped by the loss of teeth. The jaws handicapped by the loss of teeth, have been rehabilitated successfully with the scientific progress with consideration of biological, biomechanical, bioeasthetic, biophonetic and biopsychosocial factors. Decay and periodontal diseases is a prime reason for loss of teeth. Majority of the edentulous people are at the age over 50 years and elderly. The large populations of elderly edentulous people are dependent on their meager income or support of their children. This organ of the human body,Stomatognathic system handicapped with loss of teeth can be successfully rehabilitated and edentulous persons are thus no more considered as handicapped. The treatment plan for providing a complete denture prosthesis has two phases - a Clinical phase and Laboratory phase. This treatment procedure usually takes approximately 7 clinical appointments, (an hour's duration each) in a regular dental clinics or hospital. For the elderly edentulous patients who are mentally, physically, and economically compromised these visits are tedious, tiresome and time consuming and also may involve long distance travelling. The author, a Prosthodontist, conceptualized and implemented in 1987 a project “Institutionalized approach total health care for rural and semi urban population at door step - free of cost” (Establishment of Rural Satellite Centers, Awareness programs house to house visit and Street Plays, School Health Programmes, Oral and Dental awareness Treatment Camps). Under this project the qualified manpower, instruments, infrastructure and advanced therapeutic facilities are made available by facilitating accessibility, availability and affordability for the people living in rural areas. (By 2006 over 1,500,000 rural people are treated and benefitted from this Project). He envisionedthat under this project,providinga complete denture prosthesis in a single day for those edentulous patients of the rural population at a camp site. This concept of single day denture camp in which an edentulous patientis diagnosed and treated with a new pair of artificial complete denture prosthesisat a treatment camps in a day. The patients who are treated and provided with complete denture prosthesis are followed up after 48 hours by revisiting the camp site. The single day denture camp was conducted at Uppinangady (Karnataka) for the first time in 1990, with limited manpower. There after 45 such single day denture camps were conducted (total number of complete dentures are 1920). The highest number of patients provided with complete denture prosthesis in a day was 175 at Chintamani, Karnataka. These camps are conducted even at outside the state in places like Coimbatore in Tamil Nadu, Tirupathi in Andhra Pradesh and Payannur in Kerala. Organizing single day denture treatment camp`s. By associating and interacting with the local village leaders, local voluntary organizations, clubs,gramapanchayaths, charitable institutions and NGO like Rotorian, Lions etc., are taken into confidence for dissemination of information and broader participation . These agencies are requested to facilitate and to provide arrangements for clinical and laboratory work places,furnishingwith chairs,tables and benches. This work place is requested to be prepared in advance to simulate a clinical environment at the camp site a clinical work station for practice in a hygienic and sterile Contd. Pg 2 Dental World is honored to have Professor (Dr.) NAILADY SRIDHAR SHETTY as our guest EDITOR-IN-CHIEF. Truly a human being who has worn many hats in his time. Recipient of the prestigious DR. B.C. ROY NATIONAL AWARD and Ex-President- DENTAL COUNCIL, Dr. N. Sridhar Shetty has come a long way from a little boy in a small township to one of the best academicians, able administrators and compassionate Prosthodontist of our country. It is not without reason that on Teachers Day 2007, the Rajiv Gandhi University of Health Sciences, Bangalore should deem it necessary to honour him as one of the most distinguished eminent Senior Teacher in the field of health Sciences and possibly this country, has ever known. Through his interest, he was able to carry out Oral and Dental Health care(rural programme) awareness and treatment after care for more than 15,00,000 people at free of cost, truly a remarkable job and one of its kind throughout the world. His efforts were even highly appreciated by the global icon Dr A. P. J. Abdul Kalam. We thank him from the interior of our heart for being our guest EDITOR-IN CHIEF. Let’s look at the World of Dentistry through the eyes and heart of Prof.(Dr.) N. Sridhar Shetty. Neeraj Kaushik 2 April-May, 2010 Issue-2 Vol-10 providing knowledgeable, skillful manpower for the health care of stomatognathic system. Man power ratio to the population is being achieved. At present qualified manpower, equipments and instruments, infrastructure and advanced therapeutic facilities are concentrated in big cities and towns, which make up only 20% to 30% of the population of the country. 70% to 80% of the population is inhabitated in the rural areas who are mostly poor and ignorant of healthcare facilities. Extension of health care facilities is a duty and obligation of the profession. The profession needs to create awareness, accessibility, availability and affordability for the people in rural areas, by implementing newer policies and approaches for assessment, prevention, diagnosis, treatment and after care to lead a quality life without compromising on educational standards in curriculum and duration. The Dental graduates who are taking qualification have to spend large sum of money and time (5 years duration) and further Post graduation takes additional large sum of money and time(3 years duration). To establish their private practice they have to further look for large sum of funds approximately for the tune of Rs. 300,000 to Rs. 500,000. Since the economy of the rural people is poor, their priority for oral and dental health care will be the last. Practitioners in the rural areas even at economical treatment cost, will not attract patients to have sufficient income and would like to settle in metropolitan cities, big cities and towns to maintain his or her economical status. This being the situation in our country a policy to be formulated and legalized to take the qualified people to the rural areas for treatment and after care. Teaching institutions have a requirement of manpower of quantity and quality, support staff including nurses, hygienist, technicians, etc. and students. In addition to the infrastructures, instruments, equipments and therapeutic facilities which are required for the clinical training of graduate, postgraduate students. The teaching institutions are probably the best resources for providing economical healthcare (Free of cost) for the deprived population. A statute can be formulated and changed for all teaching institutions. The manpower at the institution must spend their learning and teaching and clinical practice in and around clusters of rural centers equipped with clinical facilities as in the dental institution teaching clinics, instead of working under just one roof within a campus with metropolitan comforts. ? The Institution should take the responsibilities (by law) of health care for minimum of 100,000 rural families in the vicinity of 200 to 300 K.M. radius of the institution. ? Teaching institutions should establish a separate network of teaching clinical centers (Minimum of 5 Satellite centers, with continuous interaction with the nucleus institution) where teachers and students along with other staff impart care to the patients (learning, teaching and treatment). ? Mobile preventive and treatment teams with portable equipments and instruments, to conduct treatment camps for these populations in total, frequently and perpetually for health awareness, prevention, treatment and after care. ? The curriculum has to be updated, modified to include a programme for the students to visit house to house (Awareness at the doorstep) to create public health, and oral and dental health awareness, as well as to conduct epidemiological and demographic distribution of target diseases and identification of hospital care need of each family. A formulated health assessment team comprising of faculty members, postgraduate and undergraduate students and interns and social workers. ? Curriculum to be introduced for the awareness of patients, to include street plays, folk dances, writing of poems, etc which would enhance the ability of the students to communicate with society and create a lasting impression for proper healthcare and prevention of diseases. ? The clinical teaching program must be conducted by faculty members in each specialty divided into smaller groups at different satellite centers to facilitate divided groups of students for clinical training and learning, and patient management. The students are to be taught and trained in smaller groups in each satellite centre focusing on prevention, diagnosis, treatment and aftercare. Message ? With the present technology students can be taught via the E-learning process and get exposed to all faculty members for lectures, clinical discussions and interactions. ? Our resources - Qualified manpower are migrating to different nations and ready to work even in hardship since the remunerations are very high and free of tax. Hence, it is necessary to bring a policy to give certain tax free incentives (rural hardship allowances, children education allowances, etc.) to all those who are working in the rural areas. The goal of reaching this target group i.e., the rural population for the total healthcare is a must. We as a professionals are proud of its status, qualifications and abilities. We have ethics, morals and duties as professionals to take care of this poor ignorant rural population of our country for total healthcare to create healthy rural India. The profession along with their governing and regulating authorities should come forward to meet the requirement of the day Awareness, Accessibility, Availability, Affordability to implement and provide “total health care for rural population free of cost”. Contd from pg 1....Fit & insertion of environment(cleanliness with disinfectants).Provision for water, electricity/generator, toilets and provisions for waste disposal are also arranged for. These volunteers arerequested to publicize the program and pool the edentulous patients at the proposed treatment centers like the village centers or schools or community hall etc. They are also requested to arrange and provide food and water free of cost for these patients, since they have to be present from 8 AM to 6 PM continuously at the camp site. Since each patient has to be attended continuously for treatment (approximately 9 hours) the number of patients is restricted to a maximum of 100 to proportionate the manpower, equipment etc. The treatment is carried out following the protocols for sterilization asepsis, infection control and hospital waste management (disposal of sharps and non-sharps, biodegradable material etc.is carried out by collecting all materials in a disposable bags and carryingthem back to the institution for incineration) Team for single day denture camps: The team consists of Teaching Faculty, Postgraduate students, interns, Nurses, clinical assistants, Dental mechanics, maintenance engineers and social workers. Keeping in mind the importance of cross-infection control, acceptable clinical steps and laboratory steps, planning sessions are conducted by the team members before the day of treatment camp for co- ordinated and speedy clinical and laboratory work.It is planned to fit and insert complete dentures prosthesis before 6.00 p.m. so as to help the patients to reach their home before sunset. Equipment, Instruments and Materials Dental Chairs: As the number of patients would vary from 50 to 100,theregular dental chairs and units is not feasible to transport.Hence a concept of simple portable dental chair for clinical work station was introduced. The patients are made to recline over the cushioned boards placed against the back rest of any ordinary chair which would enable the patient's head and neck to be stabilized, being pre-requisite for any dental treatment. Each station is provided with a small table to facilitate placement of required instruments and materials. The material cost and expenses for medicine etc., are borne by the institution/charitable organizations. Cross Infection Control Implements and practice: 1. Disposable Gloves 2. Disposable masks 3. Doctor's Coat(below Knee Length and long sleeved) 4. Provisions of wash basin at work stations containing dettol/betadine solutions for necessary hand disinfection. 5. Individual Spittoons (buckets) containing small quantity of dettol solution. 6. Separate bags for collecting waste (cotton, gauze, material etc.) 7. All the instruments including linen (for patient's cover and wrapping of instruments), gauze, and cotton are carried in individual sterilized kits. Emergency Drugs: Oxygen cylinders and emergency drugs (cardiac and allergic etc conditions) Material: modeling wax and boxing wax, Acrylic teeth sets (300 assorted in size, shape color), dental plaster, dental stone, impression materials alginate, green stick compound, zinc oxide eugenol, self cure acrylic resin (tray material), heat cured acrylic resin, separating media, pumice, whitening powder, polishing cakes, cellophane sheets for trial packing, articulating papers. Closed Porcelain jars for mixing heat cured acrylic resin powder and liquid. Equipment and Instruments: Model Trimmers (5), Gas Lines with cylinders for 25 stations with Bunsen burners, spirit lamps (100), laboratory micro-motors(Heavy duty) with straight hand pieces (30) , polishing and trimming lathes (5), Bench Presses (5), are transported from the institution. 10 HP portable generators are carried to the camp site from the institution or arranged by the volunteers. For curing of the acrylic dentures, the requisite of acrylizer cannot be transported and utilized for want of electricity. Three large containers (capacity to hold 100 pairs of flasks) are requested to be arranged from by the volunteers where cooking gas or firewood is used to warm and boil the water. One vessel which is smaller in height is utilized for the dewaxing to facilitate retrieval of artificial teeth in the event of loss from the flask. (for easy visualization and access). The second vessel is used for initial curing where in temperature is controlled to be within 65-70 degrees centigrade (to be checked with finger) for half an hour. The third vessel is for boiling the water where the flasked denture is cured at 100 degrees for one hour. Set of Instruments for each work station (both clinical and laboratory): Mouth Mirrors, Tweezers, Stock Impression Trays (Edentulous), indelible pencils, Wax Knife, Plaster knife, wax spatulas, lecron Carvers, Rubber Bowls, Flasks and Clamps, Flask Carriers for dewaxing, Plastic or wooden hammers, frit saws (small carpenter's saw), brushes and wooden spatulas, Long Metal Hooks to attach to the flasks to remove from curing, Metal Number Tags for identification of the individual pairs of flasks. During curing, Lathe stone, polishing cones, wool buffs, wheel brushes, sandpaper rolls, Trimming stones (acrylic trimmings burs, assorted shaped stones, fissure burs, sand paper mandrels. S.S. Kolakebail, Adocate, Ex MLA, Kundapur, Date 16.9.1992 My Dear Siri, Three months are over since you made me a new man, My people here though they loved me so much, they only established that I am 82 years old by celebrating my age, whereas yours was the simple direct miracle. With a day you reversed the order of the age and made me 28 years young man… … You may be rather surprised that I am a living advertisement that everyone sees me young, see your miracle. The denture speaks to your extra-ordinary ability and merit in your vocation…………… With love Sd/- To:Prof. (Dr) N. Sridhar Shetty Dean, A.B.Shetty Memorial Instt. Of Dental Sciences, Deralakatte, Mangalore Procedure: Each patient is treated by one Postgraduate student/Doctor who is assisted by one intern or a senior student. Five working stations (group of 5 patients) will be supervised and guided by the one faculty member to facilitate for a speedy work. . One technician is designated for five work stations. (Five students one faculty one technician). 8:00 AM - Patients are seated at clinical work station and examined to see the overall status of the edentulous ridges and associated structures.Patients attitude, adaptability and expectations are assessed. The patient is informed in advance about the treatment plan , duration , initial difficulties in learning and wearing dentures. The expected retention, stability, esthetics and comforts. 8:10 AM 8:30AM: Primary Impression the stock tray is selected and modified to fit approximately maxillary and mandibular alveolar ridges in patients mouth for making the primary impressions. The doctor / postgraduate student with assistance of the intern/student will make the maxillary primary impression by using alginate impression material. The impression is carried to the lab immediately by intern to pour the cast and to prepare the special tray quickly. In the mean time the mandibular alginate primary impression is made and carried by the doctor to pour the cast for preparation of special tray. 8:30AM 9:00AM - Thestudent/intern and technician will pour the cast and separate Contd pg 4 April-May, 2010 Issue-2 Vol-10 3 4 April-May, 2010 Issue-2 Vol-10 Contd from pg 2....Fit & insertion of the impression from the set cast , custom made acrylic resin tray is fabricated with spacer and stops and made ready for making the final impression. The maxillary custom tray will be prepared first (8:45 AM) followed by the preparation of mandibular custom tray. Thus prepared trays are placed in warm water for 10 minutes before being checked in the patient's mouth. 9:00 AM 9:20 AM - The maxillary custom tray which is made ready is immediately carried to the work station, checked in the patient's mouth and adjusted for its fit and extension .The peripheral moldingis carried out by low fusing modeling plastic (green stick compound) and impression is made by using zinc oxide eugenol paste and sent (with intern) for pouring in dental stone to make the master cast and to prepare temporary denture base carrying occlusion rims (Technician and Intern). (9:20- 10:00AM) 9:20 AM 9-40 AM - The mandibular custom tray which is made ready is quickly taken to the clinical work station and checked in the patient's mouth and adjusted for its fit and extension.The peripheral molding is carried out by low fusing modeling plastic (green stick compound) and impression is made by using zinc oxide eugenol paste and sent for pouring in dental stone and to make the master castand to prepare temporary denture base carrying occlusion rims (technician and intern). (9:40- 10:20AM) 10:00 A.M Maxillary Occlusal Rims are adjusted in the patients mouth for facial fullness, anterior and posterior occlusal plane, lip lines (high and low),smile line,midline and canine lines. 10:20A.M 10:30A.M Mandibular Occlusal Rims are inserted in the patients mouth to occlude and adjusted for establishment of vertical clearance of occlusion(VD). The patient is trained to capture centric relation and relevant canine line, midline are marked. The maxillary and mandibular occlusalrims occluded in centric relation is sealed and centric relation is registered. Selection of teeth is done for arrangement of artificial teeth. 10:30 A.M 11:00 A.M Mounting of sealed occlusal rims on free plane mean value articulator. (non-adjustable) 11:00 A.M 12 Noon Arrangement of teeth, waxing and contouring 12 Noon 12.20P.M Try in of waxed up denture 12:20 P.M 1:20 P.M Flasking of maxillary and maxillary waxed up dentures. (Alongwith assistance of intern and technician) 1:20 P.M 1:30 P.M Working lunch 1:30 P.M 1:45 P.M Dewaxing of maxillary and mandibular flasked waxed up denture and application of separating media. 1:45 P.M 2:15P.M. Mixing of acrylic resin powder and liquid, packing, trial packing and keeping under the bench press. 2:15 PM 2:25 P.M. Bench Curing of clamped flasks. The flasks are hooked together and designated number is tagged. 2:25P.M 2:55P.M Curing in warm water for half an hour (60 70 degree centigrade to avoid porosity) 2:55P.M 3:55P.M Clamped Flasks are transferred to the vessel containing boiling water and kept for one hour for curing. 3:55 P.M. 4:05 P.M Bench Cooling 4:05 5:00P.M Deflasking, Trimming and Polishing of Acrylized Denture 5:00 PM 5:30 PM Fit, Insertion and Post Insertion Instructions. Patients are recalled to the camp site after 48 hours for review by team of four doctors. The faculty and students continue to practice providing a complete denture prosthesis in a day at the institution for those who are travelling from long distance. PROFESSOR (DR)NAILADY SRIDHAR SHETTY is Founder Dean and DIRECTOR, CADSS(Centre for Advanced Dentofacial stomatognathic Sciences), A.B.SHETTY MEMORIAL INSTITUTE OF DENTAL SCIENCES. Professor Shetty has above 45 years of teaching experience, record 21years as a principal/Dean of one of India’s best Dental College. Through this project study, Dr Shetty has set up a benchmark for other dental institutions on How to provide specialised dental treatment even to the remote areas. February-March, 2010 Issue-1 Vol-10 5 Ruby Dental Pvt Ltd 1085, Bazar Paiwalan, Near Jama Masjid, Delhi-6 Phone No: 011-23285001, 23266400 Fax: 91-11-23278569, Cell: 09811144220 E Mail: rubydentalpvtltd@yahoo.co.in www.rubydental.net April-May, 2010 Issue-2 Vol-10 6 Full Mouth Rehabilitation- A case report Prof. (Dr.) Chethan Hegde, Prof.(DR) N. Sridhar Shetty, Prof. (Dr.) Manoj Shetty, Prof. (Dr.) Krishna Prasad D. One of the most challenging treatment procedures in restorative dentistry is to restore completely mutilated dentition. This involves not only the restoration of teeth but also the rehabilitation of entire stomatognathic system. Of the many, one of the most accepted techniques in full mouth rehabilitation is the modified Pankey-Mann- Schuyler technique. This article describes the systematic approach to be followed to achieve this goal, namely 1. Static coordinated occlusal contact of the maximum number of teeth when the mandible is in centric relation. 2. An anterior guidance that is in harmony with function in lateral eccentric positions on the working side. 3. Disclusion by the anterior guidance of all posterior teeth in protrusion. 4. Disclusion of all non-working side inclines in lateral excursions. 5. Disclusion of all the working side inclines in lateral excursions. Pre-operative examination and assessment involves not only assessment of teeth and its surrounding structures but also of entire stomatognathic system involving the centric relation, vertical dimension, neutral zone, components of smile, existing centric and eccentric occlusion and cause for mutilation of dentition. This case report describes various steps described in modified Pankey-Mann-Schuyler technique incorporated in the rehabilitation of a completely mutilated dentition due to Amelogenesis Imperfecta (Figure1). Fig. 1 Fig. 2 Stage I: Preparation of mandibular anteriors and restoration This is the starting point where all lower anteriors were prepared and restored (figure 2). Various guidelines were followed to reestablish lower incisal plane (a) lower incisal edges were placed at the level of lower lip during rest, (b) lower canines were placed at the level of corner of mouth, (c) lower incisal edge were barely made to touch the upper incisal edge when the patient pronounced the alphabet 's', (d) incisal edges were made to slant labially with linguo-incisal edge 0.5mm higher than the labio incisal edge like a incisal wear facet (figure 3). Fig. 3 Fig. 4 Stage II: Preparation of mandibular posteriors To start with, the lower occlusal plane was assessed. In order to achieve disocclusion, it was necessary to incorporate anteroposterior curve of Spee. It was done using Broadrick Occlusal Plane Analyser [1] by drawing a four inch arc on flag post from anterior most part of condyle and another arc from end of distal slope of canine. From point of intersection of these two arcs, referred to as survey centre, a four inch arc is drawn on all posterior teeth which represented posterior occlusal plane (figure 4). A wax template was prepared along a line 1 to 1.5mm below the established occlusal plane which was used as template for occlusal reduction of posterior tooth preparation. At this stage lower posterior teeth were not restored. Fig 5 Fig. 6 Stage III: Preparation and restoration of maxillary anteriors All maxillary teeth were prepared, both maxillary and mandibular impressions and subsequently casts were procured. Maxillary cast was mounted using facebow to facilitate transfer of orientation relation. At this stage centric relation record was made by guiding mandible to centric relation according to Dawsons bimanual manipulation technique [2] at an established vertical dimension. Since all posterior teeth were kept out of occlusion in the earlier stage there were no occlusal interference, this facilitated easy and precise recording of centric relation. Palatal contours of maxillary incisors were built in such a way that lower incisal edges barely touched the upper lingual fossae which directed forces along the long axis of maxillary anteriors. Anterior guidance was established using customized anterior guide table prepared preoperatively keeping disocclusion of posterior teeth in mind [3]. Phonetic and esthetic guidelines were considered to establish height of maxillary teeth. By pronouncing labio-dental sound 'f' incisal edge of maxillary teeth were made to touch the vermilion border of lower lip thereafter upper and lower teeth were barely made to touch while pronouncing dental sound 's'. Incisal edges of maxillary teeth were made to follow lower lip line during smile. Stage IV: Restoring the mandibular posterior teeth Lower posterior teeth were waxed up arbitrarily. Using Broadrick occlusal analyser, a four inch radius arc was marked from survey centre over waxed up posterior teeth. This line denotes level of posterior occlusal plane thus established height of posterior teeth as well as curve of Spee. Lower lingual cusps were established at a level 1mm lower to level of buccal cusp height; this establishes the curve of Wilson which helps in easy transfer of food bolus from tongue to occlusal table and vice versa. Curve of Wilson also helps in disocclusion of posterior teeth during laterotrusive movements. The inner inclines of lower posterior teeth were determined using Fossa Guide [2], which is a arrow shaped guide which is established based on lateral border of envelope of movement determined by canine guidance (figure 5). The buccal and lingual inner inclines of lower posterior teeth were made to be wider than the inclines of fossa guide which would help in elimination of any interference of posterior teeth inclines during lateral movements. These crowns were cemented in place. Fig. 7 (Post-operative) Pre-operative Stage V: Preparation and restoration of maxillary posterior teeth Maxillary posterior teeth were prepared, impression was made and cast was poured. Using hard base plate wax a firm base extending from prepared teeth on left side to right side was prepared and was mounted with soft mouth temperature wax to record functionally generated path [4]. This wax mount was placed inside patients mouth, patient was made to close by guiding the mandible to centric relation. Next patient was guided to right, left and protrusive mandibular movements. Patient was allowed to make all intermediate and functional movements himself and record the path travelled by all lower posterior teeth on functional wax. A stone core (figure 6) was poured on this functional generated path which was used to make maxillary crown wax pattern [5] which would disocclude during all eccentric movements. These completed crowns were tried in patient's mouth for uniform contact of all posterior teeth in centric relation and for mutually protected occlusion and cemented (Figure 7). Conclusion: Modified Pankey-Mann-Schuyler technique provides step by step procedure to be followed in full mouth rehabilitation and helps in achieving defined goals and objectives. Even though procedures involved are very elaborate, they are easy to follow and gives a sense of security to the restorative dentist, specially to those who are attempting full mouth rehabilitation cases for the first time. References: 1. Christopher D. Lynch, Robert J. McConnell. Prosthodontic management of the curve of Spee: Use of the Broadrick flag. J Prosthet Dent 2002;87:593-7. 2. Dawson, P. E.: Functional Occlusion: From TMJ to Smile Design, Elsevier, 2007, pp 75-83, 214-220. 3. Dawson, P. E.: Evaluation, Diagnosis, and Treatment of Occlusal Problems. St. Louis, 1974, The C: V Moshy Co..p 161. 4. Pankey LD, Mann AW: Oral rehabilitation. Part II. Reconstruction of the upper teeth using a functionally generated path technique. J Prosthet Dent 1960; 10:151-162. 5. Meyer FS: The generated path technique in reconstruction dentistry. Part II. Fixed partial dentures. J Prosthet Dent 1959;9:432-440. Authors Prof. (Dr.) Chethan Hegde Prof.(Dr) N. Sridhar Shetty Prof. (Dr.) Manoj Shetty Prof. (Dr.) Krishna Prasad D. Professor, Department of Prosthodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore. Director, CADSS, A.B.Shetty Memorial Institute of Dental Sciences, Mangalore Professor, Department of Prosthodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore. Professor and Head of Department, Department of Prosthodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore. April-May, 2010 Issue-2 Vol-10 7 Welcome to the World of dentomed Dentomed is specializing in developing, innovating and importing complete range of dental equipments to offer you customised solutions for your clinical and institutional needs. “QUALITY FIRST, SERVICE UPMOST, AFFORDABILITY FOR ALL” is our service tenet. We are working ourselves to supply many kinds of products, such as DENTAL CHAIRS & UNITS, LED CURING LIGHTS, HANDPIECES, AUTOCLAVES, AIRCOMPRESSORS, X-RAY UNITS and others a lot more. We constantly work hard to ensure superior quality, dependable performance, attractive designs, sophisticated technology and reasonable price products to suit your clinical and institutional needs. OUR MISSION: “Deliver dependable and reliable dental products and services for better dentistry that benefit practitioners and patients everywhere with focus on INNOVATION, QUALITY, SERVICE AND AFFORDABILITY”. Passion, Vision, Innovation, Affordability and Service. These five words manifests our corporate philosophy, our beliefs and values and in the products and services provided by Dentomed. These words establish the focus and direction of our work and express our commitment to our customers. Our company is built on product leadership, scientific innovations, and customer orientation. Our journey builds on our commitment to innovate by providing world class solutions and services for all your clinical and institutional needs. Today our ability to uniquely combine our product portfolio puts us in a leading position in the industry. We are able to offer full range of solutions for all your clinical needs. Our biggest strength today is that we deliver on our promises and will never be satisfied until you are satisfied with our products and services. You have my word on it. Sincerely, Vivek Tangri (09654350641), vivektangri8@gmail.com Managing Director We deliver on our promises Reasons why you should buy dentomed products - AFFORDABILITY - PRODUCT QUALITY - INNOVATIVE TECHNOLOGIES TO FULFILL EVERCHANGING CLINICAL NEEDS. - ALL BUDGET CLINICAL SOLUTIONS - COMPLETE RANGE OF DENTAL CLINICAL EQUIPMENTS UNDER ONE ROOF. - ADEQUATE INVENTORY TO ENSURE QUICK DELIVERY. - ALL SPARE PARTS AVAILABLE AT ANY GIVEN POINT, SO NO WAITING. - ALL INDIA SERVICE NETWORK. NO MATTER WHERE EVER YOU ARE, OUR SERVICE ENGINEERS ARE ALWAYS NEAR YOU. - 24 HOURS IN YOUR SERVICE. - OUR RESEARCH TEAM TO CONSTANTLY MONITOR NEW INNOVATIONS THROUGHOUT THE WORLD SO AS TO CONSTANTLY UPDATING PRODUCT PORTFOLIO. - A BIG LIST Of OUR SATISFIED AND HAPPY CUSTOMERS. Happy Patient Bechara Patient Of dentist who uses high quality & service reliable dentomed products. Of dentist who uses other products Refinement of Cleft Care for Developing Countries is the Theme of INDOCLEFTCON-2010 Department of Orthodontics and Dentofacial Orthopedics, Centre of Dental Education and Research, All India Institute of Medical Sciences organises 9th Annual Conference of Indian Society of Cleft Lip Palate and Craniofacial Anomalies (ISCLP &CA). This annual conference was organised from 23rd to 25th of April, 2010 in AIIMS, New Delhi. INDOCLEFTCON 2010 would provide a platform to workout strategies in the prevention and management of congenital deformities of face including cleft Lip and Palate with special reference to the developing countries including India where social, economic and educational constraints have a direct impact on this problem, says Prof. (Dr.) O. P. Kharbanda, President- ISCLP and CA And Organising Chairman, INDOCLEFTCON-2010. Prof. (Dr.) O.P.Kharbanda, President-ISCLP & CA and Chairman-INDOCLEFTCON 2010 April-May, 2010 Issue-2 Vol-10 8 My Students who made me Proud Prof. (Dr.) N. Sridhar Shetty Prof. (Dr.) S.Ramananda Shetty Vice chancellor P r o f e s s o r R a m a n a n d S h e t t y , A Prosthodont is t who has occupied the highest seat of the Rajiv Gandhi U n i v e r s i t y o f Health Sciences, Bangalore. He was my student at G o v t . D e n t a l C o l l e g e , Bangalore who r o s e i n t h e profession today he is a consultant , Professor and administrator and is a robust live fish in a stream of professional education that has been intricately knitted with Health care service. I am proud of my beloved student , Vice Chancellor Ramananda Shetty. Presently, he is Vice-Chancellor of Rajiv Gandhi University of Health Sciences in Karnataka, the largest Health Sciences University in India. He has brought metamorphic changes in administration, governance, academic standards; secured academic excellence in teaching that will have a permanent improvement in Health Care Delivery. The University did not inherit any International linkages in the past ten years of its existence. Dr.Shetty initiated discussion with several Universities of repute abroad and even visited some of them. His efforts yielded in signing the MOU with Gulf Medical University, Minnesota, USA etc. The intention is to start bilateral exchange programs for students and faculty in affiliated colleges and also to offer dual degrees jointly. His dynamism crossed the state and attracted attention of Her Excellency President of India, Smt. Pratibha Patil. She appointed Dr S. Ramananda Shetty as nominee of the President to the Banaras Hindu University to serve till December 2012. ”A complete administrative system that towers above scores of professional Health scientists, teachers, distinct administrators, educationists and professionals all traits rolled into one is the name Dr S. Ramananda shetty”. Vice Chancellor, Rajiv Gandhi University of Health Sciences, A largest Medical University, Bangalore Dr. B. Subhashchandra Shetty Dr. Subhaschandra Shetty an endodontist who is a Managing D i rec tor o f lead ing manufacturing company C o n f i d e n t D e n t a l Equipment Ltd., The warmth of my affection to him stems from the fact that Dr. Subhaschandra Shetty is my student. I was a faculty at Govt. D e n t a l c o l l e g e , Bangalore where he he persued his BDS and M D S d e g r e e . D r . Subhaschandra Shetty is a dynamic, diligent , sportsman . He was friendly humane and had leadership qualities. He was loved by his fellow students and the faculty. He is the personality to take the challenge . He was the first professional dental surgeon who has entered inot manufacturing dental Managing Director, Confident Dental Equipments Ltd. equipments . He established a company “Confident Dental Equipment Company Lit. wherein he was instrumental for bringing high tech equipment to the country. He made available for the Indian dental surgeons , a international standard equipments at a competitive and economical prices and made practitioner professional life easy. Confident today is largest Producer of Dental Equipment in Asia, Developed entire ranges of Clinical and Laboratory equipment, saving great amount of foreign exchange and also made the technology available to everyone. This is the Proud Company which has developed equipment on par with any of the world class equipment. He had held several prestigious positions including President-Indian Dental Association. As IDA President formulated a single Constitution. Earlier every branch use to hold a constitution giving room to lot of litigation. Single constitution helped greatly to discipline of Association. Dr. Vimi S. Dr. Vimi S. , BDS, MDS.,Senior Lecturer in the department of Oral Pathology of SINHGAD DENTAL COLLEGE, PUNE As a teacher for the last 45 years thousand of students passed out from the institutions where I was a faculty. During my carrier at Govt. Dental College Bangalore as a faculty , there were many dynamic students who are intelligent with highest ranks in academics and professional capabilities there were many students who are sportsmen of repute , and excellent in extracurricular activities. I remember there was a brilliant a student a rank holder and state basket ball player, Dr. Sudhindra with whom I played basket ball and also associated with his as a junior faculty member There are many such brilliant personality who where my students and occupied highest positions in academics , administration, research and industries at international and national level. With above memories I would like to present the most recent star students is Dr. Vimi S. a pleasing personality , sportsmen and the university rank holder . She was most familiar and friend to fellow students and her teachers. Dr. Vimi joined as first BDS student at A.B.Shetty Memorial Institt. Of dental; Sciences in the year 2000. She impressed every faculty member as a best student in the class and the best in sports and games and most capable person in extracurricular activities. She is the rank holder in the university from first year to final year and all rounder sportsmen and a leader at the institution when she was a student at this college. She was loved and recognized by one and all as one of the most brilliant and lovable student of the college . She persued her post graduation MDS in Oral Pathology and joined as faculty which is the right choice for her carrier . I wish her to become great teacher and researcher. I wish her all the best in her future endeavor to be a icon of the profession of dentistry. Prof. (Dr.) N. Rajiv Shetty - my teacher & source of inspiration Prof. (Dr.) N. Sridhar Shetty Prof. (Dr.) N. Rajiv Shetty The dream begins with a teacher who believes in you, who tugs and pushes and leads you to the next plateau, sometimes poking you with a sharp stick called "truth." These words of Dan Rather reminds me of my teacher Prof. Rajiv Shetty. Whatever I have achieved in life is because of my teachers, as a great teacher is like a candle - it consumes itself to light the way for others. My writing as Editor-in-Chief would never complete without the mention of Prof. N. Rajiv Shetty. Prof. Rajiv Shetty needs no introduction for being at the helm of affairs for over 5 decades in the field of dentistry, a renowned endodontist , most respected dental surgeon , dedicated teacher , disciplined and upright administrator and a role model. He has a reputed professional carrier and most seeking consultant dental surgeon in the profession for the last 5 decades. He is in the profession as a teacher, principal, and director of medical education. Prof. Shetty with his vast experience was also Director of Medical Education for the Government of Karnataka, and has to his credit being the first ever dental surgeon in the country to occupy this prestigious post . He happens to be one among the few pioneers and renowned specialist in the field of dentistry. He was the member of Dental Council of India , Karnataka Dental Council , Indian Dental Association, Federation of Operative Dentistry in India, Fellow of International college of Dentists , he occupied coveted post of President Federation of Operative dentistry in India. He was honored at the silver jubilee of International college of Dentists for the outstanding achievement in the field of dentistry, at the Asia pacific Dental Federation for sincere and dedicated services rendered towards operative dentistry in India , he was honored by the Federation of Operative Dentistry in India for his excellent service and enhancement of the profession . He was presented with the plaque of honor by the Rajiv Gandhi University of the Health Sciences, on teachers day he as was honored by the Indian Dental Association , Bangalore Life time achievement award for his dedicated and outstanding service to the cause of dentistry in Karnataka for more than 40 years. He was also honored by Bunt sanga association for outstanding achievement in public life. He has been honored with several awards including the Rajyotsava award, the highest honor in the state by Government of Karnataka for his outstanding achievements in the field of dentistry. He has also been presented with the certificate of merit for distinguished contributions to dentistry by the “Pierre Fauchord Academy” United States of America”. Brief News Courtesy-Dibya Industries April-May, 2010 Issue-2 Vol-10 9 Carat Biopaque Carat Ecoline highest quality dental ceramics Carat Biopaque Ready-to-use Opaque Porcelain Carat Ecoline The Economic Ceramic System Marketed in India by: Call our Toll Free No. 1 8 0 0 11 7 8 7 8 Mob: 98100-57251 Email: anilberi@stimbrushes.com Global Dent Pvt. Ltd. F-91, Sector-8, Noida, UP-201301 April-May, 2010 Issue-2 Vol-10 10 Prof. N. Sridhar Shetty’s 10 Principles of a successful professional life 1. To be a Raja vaidhya (Kings Physician) is a great opportunity. Be concern and kind to serve (30%of service) the rural population of India who are void of awareness , availability, accessibility and affordability for their oral and dental care (health care) 2. Discipline is the gate way of learning. Professional education is to experience knowledge and progress our mind for better social leaving. 3. Practice the profession of dentistry with moral and ethics. Be disciplined, regular, punctual , kind and humane. 4. One cannot become millionaire in a day, sapling cannot bare fruits, and it needs to grow into a tree. Grow as a tree to bear fruit and be the successful leader of the profession of dentistry. Acquire knowledge, skill and ability to elevate pain and sufferings of people to provide quality life. 5. It is not important to be a leader or a millionaire to make quick money. Be kind and concern to the health care of rural people of India; render your knowledge, skill to serve all those rural people who are ignorant about oral and dental health care. 6. Learning is a continuous process. Be acquainted with progress of science of dentistry continuously and perpetually. 7. Be in contact with your alma mater to update your knowledge, clinical skills and practice. 8. Associate with your professional colleagues, exchange and share your professional experience. 9. Make habit to read scientific news matters, journals, and progress of the science to know and understand this scientific world. 10. Associate with nongovernment. organization and professional association render your service and experience for the better cause of human beings and your social living. Now grow your tooth by stem cell, a new technology :Stem cell banking in india Author: Prof. (Dr.) Sanjay Agarwal , Co-author: Dr Priti Agarwal Stem cells are cells found in all multi cellular organisms. They are characterized by the ability to renew themselves through mitotic cell division and differentiate into a diverse range of specialized cell types. Research in the stem cell field grew out findings by Canadian scientists Ernest A. McCulloh and James E. Till in the 1960. The two broad types of mammalian stem cells are: embryonic stem cells that are isolated from the inner cell mass of blastocysts, and adult stem cells that are found in adult tissues. In a developing embryo, stem cells can differentiate into all of the specialized embryonic tissues. In adult organisms, stem cells and progenitor cells acts as a repair system for the body, replenishing specialized cells, but also maintain the normal turnover of regenerative organs, such as blood, skin, or intestinal tissues. Stem cell can now be grown and transformed into specialized cells with characteristics consistent with cells of various tissues such as muscles or nerves through cell culture. Highly plastic adult stem cells from a variety of sources, including umbilical cord blood and bone marrow, are routinely used in medical therapies. Embryonic cell lines and autologous embryonic stem cells generated through therapeutic cloning have also been proposed as promising candidates for future therapies. The classical definition of a stem cell requires that is posses two properties: ? Self renewal- the ability to go through numerous cycles of cell division while maintaining the undifferentiated state. ? Potency- the capacity to differentiate into specialized cell types. In the strictest sense, this requires stem cells to be either totipotent or pluripotent- to be able to give rise to any mature cell type, although multipotent or unipotent progenitor cells are sometimes referred to as stem cells. Potency specifies the differentiation potential (the potential to differentiate into different cell types) of the stem cell. ? Totipotent (a.k.a. omnipotent) stem cells can differentiate into embryonic and extraembryonic cell types. Such cells can construct a complete, viable, organism. These cells are produced from the fusion of egg and sperm cell. Cells produced by the first few divisions of the fertilized egg are also totopotent. ? Pluripotent stem cells are the descendents of totipotent cells and can differentiate into nearly all cells, i.e. cells derived from any of the three germ layers. ? Multipotent stem cells can differentiate into a number of cells, but only those of a closely related family of cells. ? Unipotent cells can produce only one cell type, their own, but have the property of self- renewal which distinguishes them from non-stem cells (e.g. muscle stem cells). Identification The practical definition of a stem cell is the functional definition- a cell that has the potential to regenerate tissue over a lifetime. For example, the gold standard test for a bone marrow or hematopoitic stem cell (HSC) is the ability to transplant one cell and save an individual without HSCs. In this case, a stem cell must be able to produce new blood cells and immune cells over a long term, demonstrating potency. It should also be possible to isolate stem cells from the translanted individual, which can themselves be transplanted into another individual without HSCs, demonstrating that the stem cell was able to self-renew. Properties of stem cells can be illustrated in vitro, using methods such as clonogenic assays. Where single cells are characterized by their ability to differentiate and self- renew . as well, stem cells can be isolated based on a distinctive set of cell surface markers. However, in vitro culture conditions can alter the behavior of cells, making it unclear whether the cells will behave in a similar manner in vivi. Considerable debate exists whether some proposed adult cell populations are truly stem cells. Fetal Stem Cells Fetal stem cells are primitive cells types found in the organs of fetuses. The classification of fetal stem cells remains unclear and this type of stem cell is currently often grouped into an adult stem cell. However, a more clear distinction between the two cell types appears necessary. Stem cell division and differentiation.-A- stem cell; B- progenitor; C- differentiated cell; 1- symmetric stem cell division; 2- asymmetric stem cell division; 3- progenitor division;4- terminal differentiation. The term adult stem cell refers to any cell which is found in a developed organism that has two properties: the abilty to divede and create another cell like itself and also divide and create a cell more differentiated than itself. Also known as somatic stem cells and germline (giving rise to gamets) stem cells, they can be found in children, as well as adults. Pluripotent adult stem cells are rare and generally small in number but can be found in a number of tissues including umbilical cord blood. A great deal of adult cell research has focused on clarifying their capacity to divide or self-renew indefinitely and their differentiation potential. Most adult stem cells are lineage restricted (mulipotent) and are generally refferd to by their tissue cells origin (mesenchymal stem cell, adipose derived stem cell, endothelial stem cell, etc.) Adult stem cell treatments have been successfully used for many years to treat leukemia and related bome/ blood cancers through bone maroow transplants. Adult stem cells are also used in veterinary medicine to treat tendon and ligament injuries in horses. The use of adult stem cells in research and therapy is not as controversial as embryonic stem cells, because the production of adult stem cells does not require the destruction of an emnryo. Additionally, because in some instances adult stem cells can be obtained from the intended recipient, (an autograft) the risk of rejection is essentially non-existent in these situations. Amniotic Multipotent stem cells are also found in amniotic fluid. These stem cells are very active, expand extensively without feeders and are not tumorogenic. Amniotic stem cells are multipotent and can differentiate in cells of adipogenic, osteogenic, mypgenic, endothelial, hepatic and also neuronal lines. From an ethical point of view, stem cells from amniotic fluid can solve a lot of problems, because it's possible to catch amniotic stem cells without destrying enbroyes. For example, the Vatican newspaper “ Osservatore Romano” called amniotic stem cell “ the future of medicine”. It's possible to collect amniotic stem cells for donors or for autologous use: the first US amniotic stem cell bank opened in Medford, MA, by Biocell Corporation and collaborates with various hospitals and universities all over the world. Treatments Diseases and conditions where stem cell treatment is promising or emerging. Bone marrow transplantation is, as of 2009, the only established use of stem cells. Medical researchers believe that stem cell therapy has the potential to dramatically change the treatment of human disease. A number of adult stem cell therapies already exist, particulary bone marrow transplants that are used to treat leukemia. In the future, medical researchers anticipate being able to use technologies derived from stem cell research to treat a wider variety of diseases including cancer, Parkinson's disease, spinal cord injuries, Amyotrophic lateral sclerosis, multiple sclerosis, and muscle damage, amongst a number of other impairment and conditions. However, there still exists a great deal of social and scientific uncertainty surrounding stem cell research, which could possibly be overcome through public debate and future research, and further education of the public. Research Patents The patents covering a lot of work on human embryonic stem cells are owned by the Wisconsin Alumni Research Foundation (W A R F). W A R F does not charge academics to study human stem cells but does charge commercial users. Embryonic Stem Cells. Advantages- ? Because they have the potential to become any cell in the human body, embryonic stem cells are commonly considered to hold the most promise for treating disease and replacing tissue and cells. ? Large numbers can be easily grown in the laboratory. Disadvantages- ? Safely and effectiveness in human has not yet been determined. ? Because they have the potential to become any cell in the human body, they are difficult for scientist to control. ? They can change into unintended types of cells in the body. E.g- cells intended to become liver cells may become pancreatic cells. Ethical issues- Many people oppose embryonic stem cell research because they believe that once termed, the embryo is a human life that showed not be destroyed. This is an very significant political moral and religious issues for many. Adult stem cells- Advantages- ? Have been safely used in humans for over 30 yrs. ? No danger of immune system rejection with cells from the patient's own body. ? Extremely low risk of tumor growth ? Easier to control than embryonic cells. Disadvantages- ? Present in the body in very small numbers ? More limited in what they can become than fetal or embryonic cells. ? More difficult to grow in the laboratory. Ethical issues- ? No significant ethical issues. Stemade in the first private cell bank in India which introduces the innovative concept of Dental Stem Cell Banking. Stemade has taken this innovative approach by accessing the patented technology of extracting viable stem cells from the human tooth. Stemade aims to gain repute in the new era of regenerative medicine through dental stem cell banking. Stemade is a subsidiary of Geneoval, which has a unique Philosphy of being a long term value generating companion for its stakeholders. Author Prof. (Dr.) Sanjay Agarwal, Professor and Head of Department Conservative Dentistry & Endodontics, I.P. DENTAL COLLEGE & HOSPITAL GHAZIABAD (U.P) Mob: 9811262920 Co-Author Dr. Priti Agarwal, She is in private practice in New Delhi Dental World Mumbai Helpline 9021729911 IMMEDIATE LOADING OF IMPLANTS USING SYNCONE ABUTMENTS FOR A COMPLETE DENTURE PROSTHESIS Dr. Rakshith Hegde, Prof. N. Sridhar Shetty , Prof. Chethan Hegde In a completely mucosa supported complete denture prosthesis, retention is a major problem. Anchoring such prosthesis with endosteal implants is the best method of achieving maximum retention even under load. If the patient opts for an implant supported prosthesis, a “fixed” denture can often be delivered immediately after implant placement. About 30 years ago, in 1979 Dr. Philippe Ledermann demonstrated that four implants primarily splinted on a bar can be immediately loaded. The resilience between the die and matrices(bar-joint denture) has the effect of distributing the chewing forces through the implants and also through the base of the denture to the mucosa and the alveolar ridge. The disadvantage of the Ledermann method and other comparable concepts and current systems is the large amount of work in the laboratory that is required. This means higher costs and significantly longer treatment time. The generally older, edentulous patient (Fig. 1) with a poorly fitted total mandibular denture is primarily interested in having a denture that remains firmly seated while chewing and talking. This should be accomplished as quickly as possible i.e. in one session and without a complex procedure. The Ankylos SynCone Concept offers this option. The denture is fitted onto the abutments immediately after placement of the implants while the patient is still anesthetized. The patient can leave the clinic with a functionally and esthetically satisfactory restoration. The immediately placed prosthesis acts simultaneously as a healing plate. It covers the wound and helps to reduce postoperative swelling. The treatment method described here, is based on immediate loading of four inter foraminal ANKYLOS® implants without the use of a bar retainer. The denture is retained by prefabricated conical crowns (degunorms), which are inserted into the existing denture base by direct intraoral polymerization immediately after surgery and supported by the corresponding conical primary implant abutments (Syncone Abutments). This method facilitates secondary splinting by way of the inserted mandibular complete denture. The progressive thread design of ankylos ensures the primary stability that is essential for immediate loading in all bone qualities There are 5 factors influencing initial and lasting tissue stability, 1-No micromovement, 2-Bacteria-proof connection, 3- Platform-Switching, 4-Subcrestal placement, 5- Microroughness to the interface. Morse taper connection - No gap below gingival ,No micromovement ,Strength, Low risk of fracture, Antirotational Ankylos Progressive Thread design and micro-roughened implant surface with with increased wettable properties for initial and final bone healing and anchorage for initial and final stability. Thread design to reduce load transfer to the crestal cortical bone and greater transfer to the elastic cancellous region. Thread geometry and thread depth to reduce the concentration of tension in the emergence region of the implant through the bone(where load transfer is greatest in threaded region in threaded implants Platform Switching -ANKYLOS® CONVINCES THROUGH BETTER BONE PRESERVATION. The dense crestal apposition of peri-implant hard and soft tissue at the implant is a decisive factor for a successful, fast, and stable osseointegration of the implant and it guarantees a harmonic design of the soft tissue contour. Microbacteri a in microgap at abutment connection leading to crestal bone resorption An initial point is definitely the implant-abutment connection. Micromovements between implant and abutment can irritate the tissue. And the irritation causes bone resorption in the region of the implant shoulder. The first requirement for an implant system in esthetically critical cases is therefore one that can establish a mechanically stable and bacteriaproof connection between implant and abutment that is proof against micromovements. Some implant systems manage this by using an internal, friction locked and keyed tapered connection. This connection forms a virtual single component implant-abutment combination, which ensures stable tissue and prosthetic reliability right from the start. The single piece implant system has an axis at the implant- crestal bone junction at the crestal bone and results in crestal bone resorption. By platform switching with morse tapered connection , the axis on loading shifts away from the crestal bone and no micromovements, thereby crestal bone resorption is prevented. This gives the implantologist prosthetic reliability and the virtual single unit has many advantages for the prosthetic restoration. The fixed implant-abutment connection enables transgingival healing with no esthetic compromises and as a result optimum soft tissue regeneration. An implant with morse taper connection does not have it: the microgap, micromovement. It is automatically sealed to prevent ingress of bacteria. Chewing loads cause relative movement between implant and abutment, resulting in a pumping effect. The result is infection in the tissue at the interface level because of the ingress of endotoxins. The bone responds with resorption below the implant- abutment. The potential for infection is reduced without the microgap and without micromovement it simply does not occur. Without microbial leakage in the implant lumen there is no microbial colonization and without endotoxins no potential for infection. The implantologist should consider the most bacteria-proof, gap-free connection possible when selecting the implant system for cases with reduced bone volume, thin gingiva or particularly high esthetic demands. This will keep the peri-implant hard and soft tissue stable. Platform switching is an important factor for tissue stability but only in conjunction with a connection design that eliminates micromovements and is proof against the ingress of bacteria, referred to as platform shifting. The smaller diameter of the abutment means that there is more space for peri-implant soft tissue, which improves the red esthetics. To keep it natural looking, cylindrical implants should be placed below the bone margin, which means subcrestal placement. The subcrestal placement of microstructured at implant shoulder and with platform shifting allows the bone to grow which helps in support for the gingival tissue to establish tissue stability for esthetics. (Biological width) However, subcrestal placement is the real bone killer if the implants have a connection that allows micromovement and a microgap. The bone only remains stable in spite of subcrestal placement if there is absolutely no irritation at all, which requires a bacteria-proof and rigid connection design that also prevents irritation by platform switching. This results in a natural emergence profile that leaves space for thick, stable soft tissue above the implant shoulder. The deposition of bone above the level of the connection was formerly considered impossible because the microroughness of the implant surface always ended below the level of the implant shoulder. Implant concepts that make use of tissue deposition in the shoulder region of the implant simply extend the growth- activating implant surface over the shoulder region of the implant. Both bone and connective tissue cells are deposited on a microroughened implant shoulder and spread faster and extend more than on a machined surface. In combination with platform switching, subcrestal placement and a morse tapper connection design that eliminates micromovements and bone can grow on the horizontal shoulder surface and on the abutment. This provides support for the overlying soft tissue and for patients means long- term stability of good esthetic results. In general the following factors are taken into account when selecting the implant system: 1. No micromovement (morse taper connection) 2. Bacteria-proof connection(morse taper connection) 3. Platform switching with microroughness on the platform 4. Option of subcrestal placement and 5. Microroughness to the interface (surface area increase with increased wettability) 6. progressive thread design. The ANKYLOS® SynCone system offers this option. The denture is delivered immediately after placement of the implants while the patient is still anesthetized. The patient can leave the clinic with a functionally and esthetically satisfactory restoration. The treatment concept takes advantage of the telescopic system. The splinting of the implants, which is absolutely essential for immediate loading in all cases, is achieved via the prosthesis as a secondary factor. The industrially prefabricated, milled retention elements with a tapered design guarantee excellent fit with optimum friction. The indirect splinting with the four tapered crowns stabilizes the prosthesis and prevents it from moving. The implants are immobilized in three dimensions. The chewing loads with a solely implant-supported prosthesis are no longer distributed over the entire mucosa but are transmitted directly to the implants. The immediately placed prosthesis acts simultaneously as a healing plate. It covers the wound and helps to reduce postoperative swelling. We can quite rightly speak of significantly improved comfort during treatment for the patient under such conditions. The confirmed long-term stability of Ankylos implants combined with immediate restoration is derived from the following properties of the implant: the thread design, the morse tapered connection between implant and abutment, the cell plus surface and the resulting platform switching. The microstructure of the cell plus surface accelerates the bone reaction and supports adhesion of bone-inducing cells on the bone- implant interface. The result is a fast bone to implant contact and successful osseointegration. The progressive thread MAINTENANCE FREE EASY TO USE April- May, 2010 Issue 2 Vol 10 11 ensures the primary stability that is essential for immediate loading in all bone qualities. The stability is retained under functional loading and also when the dentures are removed. The exposed implant shoulder allows the Ankylos implant to be positioned up to more than 1 mm subcrestally. The load is transferred to the cancellous bone (particularly to the apex). Lateral forces are transferred to the bone via the profiled elbows of the threads. This reduces the load on the cortical bone and the crestal bone. An immediate implant placement reduces the bone- free, sickle-shaped space of the alveolar cavity. The implant axes should be aligned as parallel as possible. The minimum distances to the emergence openings of the mental foramen and the course of the nerve must also be considered. Implants from 3.5 mm diameter and 11 mm length are the minimum requirement. The previously prepared existing complete denture prosthesis can ideally be used for assessment of bone height by x-ray and can also be used as a surgical template. The final prosthesis is ground for accommodation of degunorm and should be as little as possible to reduce shrinkage during polymerization. The denture is placed in the exact position. When prepared in this way the SynCone caps(degunorm) can be polymerized intra orally to fit accurately in the final occlusal position without tension. Immediately on polymarization of the added selfcure resin, the denture is trimmed and delivered. This imposes an immediate functional load on the implants. There are four important considerations for placement of implants and restoration using syncone abutments : 1. Subcrestal positioning of implants 2. Tension-free, intraoral polymerization of the secondary structures 3. Secondary splinting of the implants using the prosthesis 4. A solely implant-borne denture The exact fit between secondary structure (SynCone abutments) and tertiary structure (matrices in the denture) prevents excessive horizontal force on the implants. The micromovements transferred to the implants by chewing, swallowing and talking are reduced to a minimum. To prevent excessive vertical forces as the cause of a functional overload, the patient is advised to eat only soft food for the first two weeks. The duration of the treatment is reduced to one session of about two hours and the prefabricated components allow accurate fitting at chairside. Once the osseointegration phase has been completed, a new tapered denture with a metal framework should be planned with the patient. The patient will then have a restoration that is very comfortable and esthetic with a significantly reduced denture base or a design similar to a bridge in the interforaminal region. The Ankylos SynCone concept can also be used in the maxilla but 6 implants have to be used and instead of 4degree tapered abutments as in the mandible, a 6degree tapered abutments have to be used. Also angulated syncone abutments can be used to achieve parallelism. Conclusion : immediate loading of ankylos implants for complete denture prosthesis facilitates patients treatment with implant supported prosthesis . the cost and time are reduced , and patient leaves the clinic with comfort confidence. Ankylos implants is selected for the evidence of success of longevity. The following factors enhances initial and lasting tissue stability 1. No micromovement (morse taper connection) 2. Bacteria-proof connection(morse taper connection) 3. Platform switching with microroughness on the platform 4. Option of subcrestal placement and 5. Microroughness to the interface (surface area increase with increased wettability) 6. Progressive thread design Radiological Assessment of bone height Subcrestal placement of 4 ankylos fixtures Ankylos fixtures , syncone abutments and diganomes Syncone abutments placed immediately over the fixtures and sutured Placement of rubberdam for prevention of flow of acrylic resin below the abutment Attaching dugunorms using self cure to the Prefabricated denture Dugunorm transferred on to the prosthesis Authors Dr. Rakshith Hegde, Reader, Dept. Of Prosthodontics A.B.Shetty Memorial Institute of Dental Sciences Prof.(Dr) N. Sridhar Shetty, Director, CADSS, A.B.Shetty Memorial Institute of Dental Sciences, Mangalore Prof. (Dr.) Chethan Hegde Professor, Department of Prosthodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore Behind a beautiful smile like hers is a quality lab like ours i i i i i i i 20 years of lab experience For complete lab requirement please call our Chief Technicians: Manoj Sharma Mahesh Karmakar 9871801111 9810946654 9711670777 9212756545 l t l i t l ll i f i i : j E mail: swastikamdenatlab@gmail.com 4th International Congress of Oral Implantology New Delhi is going to witness 4th International Congress of Oral Implantology which is going to be held from 21st -23rd, May, 2010 in hotel Lalit, New Delhi. This congress will be organised by the Academy of Oral implantology. Our aim would be to attract larger number of delegates and also encourage all old and new Implant Manufacturers in the country to participate in this gala event, says Dr Ajay Sharma, Organising Secretary. With the theme, "Implantology- myths and reality " this congress will witness a wealth of information about dental implants that will equip all participants with the necessary skills and know-how to help millions of toothless people with one of the fastest evolving disciplines in Dentistry today. This is in line with the main thrust of AOI's mission of providing quality implant education and research. AOI website :www.aoi-india.org DR.MEIYANG CHANG joins AB Shetty Silver Jubilee Celebrations The SILVER JUBILEE COLLEGE DAY CELEBRATIONS of A.B.Shetty Memorial Institute of Dental Sciences was held 20th April 2010 . The CHIEF GUEST of the function was DR.MEIYANG CHANG (CHANG) of INDIAN IDOL, IPL AND BOLLYWOOD FAME. DR.CHANG is a DENTAL SURGEON by qualification who passed out from V.S Dental College, Bangalore in 2006. PROF (DR.) U.S.KRISHNA NAYAK, Dean welcomed the gathering. PROF. (DR.) B. RAJENDRA PRASAD, Principal also addressed the gathering. MR.ARJUN NAYAK, Student Body President conveyed the Vote of Thanks. PROF. (DR.) PRIYADARSHINI HEGDE, Dean Student welfare also attended the function along with all the Head of departments, Faculty's and Students. Brief News 12 April-May, 2010 Issue 2 Vol 10 Crouzan syndrome -Aesthetic correction Dr. Vikram Shetty Abstract : Crouzan syndrome is a rare disorder characterized primarily by sutural synostosis which follows autosomal dominant mode of transmission. The first description seems to have been made by Crouzon in 1912. We report a 18-year-old girl with Crouzon syndrome, presenting oro-facial characteristics and describe the treatment modalities. An interdisciplinary approach including Craniofacial Surgeon, Neurosurgeon, Anesthesiologist, Paediatrician, Orthodontist, Dental Surgeon, Psychologist, Radiologist, Speech pathologist, and social worker is required for managing these patients Introduction : Crouzan syndrome is a form of craniofacial dysostosis with an autosomal dominance inheritance pattern. The cranial vault presentation is premature synostosis of both coronal sutures with a resultant brachycephalic shape to the skull. Cranial vault suture involvement other than coronal may include saggital, metopic or lambdoidal, either in isolation or in any combination. The cranial base and upper face sutures are variably involved resulting in a degree of midface hypoplasia with an angle class III malocclusion. The orbits are hypoplastic resulting in varied degree of proptosis with additional orbital dystopia that may produce a mild to moderate orbital hypertelorism. Children with Crouzon syndrome have hypoplasia of the midface with diminished nasal and nasopharyngeal spaces. This increases nasal airway resistance. Occurrence of conductive hearing deficit is common secondary to stenosis of the external auditory canals and this results in frequent middle ear infections. There is a lack of consensus on the timing and techniques of reconstruction. Lannelongue in 1890 and Lane in 1892 performed the first recorded surgical approach to craniosynostosis, who completed strip craniectomies. In 1950 Gillis and Harrison reported experience with an extra-cranial Lefort III; later this technique was discouraged because of relapse. Tessier developed an innovative basic surgical approach that included new locations for the Lefort III osteotomy: a combined intracranial and extracranial approach, use of a coronal skin incision to expose the upper facial bones and use of autogeneous bone graft. In current practice the use of internal miniplate and microplate and screw fixation is the preferred form of fixation when stability and three dimensional reconstruction of multiple osteotomized bone segments and grafts are required. Current staging of reconstruction for Crouzon's syndrome include primary cranio-orbital decompression and reshaping in infancy, repeating the craniotomy for additional cranial vault decompression and reshaping in young children, management of total midface deformity in childhood , management of jaw deformity and malocclusion in adolescents. A 18-year-old female was referred to our hospital in 2008. She was the Third child of clinically healthy parents. The Girl had craniofacial deformities, such as Plageocephaly, eye proptosis, maxillary hypoplasia with angle class III malocclusion, hypertelorism and was diagnosed with Crouzon syndrome. A routine blood work-up was carried out and the results were found to be normal. The patient was investigated with a 3-D CT scan along with saggital brain and bone cuts. Lateral and anterio-posterior cephalometric x-rays and an orthopantomograph (OPG) were taken. Radiographs of the skull revealed obliteration of sagittal and coronal suture lines with obvious bony continuity. CT revealed Craniosynostosis with premature closure of sutures, hollow orbits with proptosis, hypoplastic maxilla and zygoma, moderate degree of hydrocephalus with diffuse indentation of inner table of skull and narrowing of diploic space and prominent convolutional margins. A detailed neurological and cardiology work up was undertaken. Counseling of the family members was carried out in view of the risks of the surgery. Cross- matched whole blood, packed cells and Fresh Frozen Plasma was arranged in adequate quantity. Detailed photographs were made. A team headed by the Craniofacial Surgeon and comprising a neurosurgeon, an anaesthesiologist, an orthodontist and a paediatrician was instituted. Planning included prelimnary cuts on dry skull to assess the type of results required post surgery and to simulate the surgical procedure. Intra-operatively preparation involved shaving of the head and setting up of central venous access, an arterial line and urinary catheterization. A body warmer was placed and the patient was placed in a Case Report : slightly head elevated position. We carried out a craniotomy of the vault for access and performed the cranial cuts such that the supra orbital rims and a central bando were removed. The osteotomised segments were cut by use of additional segmental orbital ostectomies for re-shaping. The bones were repositioned in an advanced position and plated using stainless steel plates. Post-operatively the patient developed a CSF leak which stopped on the 3rd post-operative day by conservative measures. The sutures were removed on the 10th day and she was discharged. The proptosis has reduced. The patient is on routine follow-up. She is being prepared for orthognathic surgery for a Le Fort III, Le Fort I advancement and mandibular rotation. Fig 1 Fig 2 Fig 3 Figure 1,2 & 3 : Frontal and lateral views and inter-canthal width measurements showing the typical features of Crouzon's syndrome Fig4 Fig 5 Fig 6 Fig 7 Fig 8 Fig 9 Fig 10 Fig 11 Fig 12 Fig. 4 through 12 : Intra-operative photographs. Figure 13 & 14 : Frontal and lateral views in early post-operative period Fig 13 Fig 14 Figure 15 & 16 : Frontal and lateral views in 6 months post-operative period Fig 15 Fig 16 References : 1.Cohen MM Jr. Craniosynostosis and syndromes with craniosynostosis: Incidence, genetics, penetrance, variability and new syndrome updating. Birth Defects Orig Artic Ser 1979;15:13- 63 2. Cohen MM Jr. Craniosynostosis: Diagnosis, evaluation and management. Raven Press: New York; 1986 3. Syndromes of the head and neck. In : Gorlin RJ, Cohen MM, Levin LS, editors. 3 rd ed. Oxford University Press: 1990. p. 516-26 4. Cohen MM Jr. Craniosynostosis update 1987. Am J Med Genet Suppl 1988;4:99-148 Author: Dr. Vikram Shetty, MBBS, MDS, DNB Director, Nitte Meenakshi Hegde Craniofacial centre , A.B.Shetty Memorial Institute of dental Sciences, Mangalore AWARENESS OF ADVERSE EFFECTS OF TOBACCO RELATED HABITS AMONG THE NURSING STUDENTS IN MANGALORE Dr.Uzma Belgaumi1, Prof.(Dr.) Pushparaja Shetty2, Dr. Sreelatha S.V.3, Prof (Dr.) Pratima S. Rao4, Lal P. Madathil5 About 8090% of human cancers may be attributable to environmental and lifestyle factors such as tobacco, alcohol and dietary habits.1 Tobacco use is the leading preventable cause of premature death worldwide. It is estimated that 4.9 million people died of tobacco related illness in the year 2000 and by the 2020 the number will rise to 10 million /year, 70% of which will be in the developing countries. 2 Despite improvements in the management of diagnosed cases, delay in diagnosis undoubtedly increases the morbidity, mortality and the burden on the economy for providing health care.3 And health personnel could play a fundamental role in preventing Oral Cancer.4,5 The nursing community comprises a large pool of the health care system and hence can play a very vital role in oral cancer prevention and screening 6 and with this in mind a survey was conducted to evaluate the awareness of tobacco related habits among the nursing students in Mangalore. MATERIALS AND METHOD The study group consisted of 500 nursing students of Usha Institute of Nursing, a Unit of Nitte education trust. A survey questionnaire was prepared aimed at evaluation the students awareness regarding the prevalence of common regional tobacco habits, consequences of tobacco usage, signs and symptoms of precancer and cancer, study of related topics in the curriculum and interest in participation in tobacco control programmes. The questionnaire was distributed among the students and the results evaluated. RESULTS & DISCUSSION 66.75% students thought that smoking was more commonly practiced than smokeless tobacco consumption. 67% students were aware that use of tobacco could lead to both oral and lung cancer and that oral cancer was common among tobacco users with betel quid chewing being rated most common cause of cancer (52%). However there was some confusion among the students regarding the common features of early cancer. Though 38.5% of them recognized red and white lesions and decreased mouth opening as the common features, a large group (35.5%) stated that dental caries, tooth ache and pus discharge and 26% of them thought bleeding swollen gums and loose teeth are signs of early cancer. And hence adequate steps need to be taken to educate the students in correct identification of early lesions. 68% of the students said that they could recognize the signs and symptoms of oral cancer and 64.5 % students were able to recognize all the signs and symptoms correctly but the remaining students would need to be trained. The reasons for tobacco dependence according to the students were varied. 33.25% thought it was due to peer pressure, 26.25% thought it was a social practice , 25% thought it was due to lack of awareness and the remaining 15% thought it was due to stress at work. When asked how often they came across cancer patients, 56.5% said they did so rarely and 24.5% frequently. 25% students had participated in tobacco control/awareness programmes and 35.25% would like to participate in future programmes. This data is encouraging and the willingness to provide such services by the nursing community is reflected in the values obtained and this valuable resource can be appropriately channelized for cancer prevention. To strengthen the above observation an exuberant 85.5% students said that they have educated patients against its adverse effects and tried convincing patients to stop the habit. And impressive 67.25% students said that they would participate in future programmes and 23.25% of them were definite about doing so. 57.5% students were aware of the government policies on tobacco control and 80% of them thought use of tobacco should be banned. The remaining 20% did not want a ban on tobacco consumption, and this seems to be a large proportion for a community of health care personnel. It may also represent a hidden pool of the population who could possibly use tobacco products but do not acknowledge the habit due to various reasons. This would decrease the efficacy of patient management and hence steps need to be taken to reinforce positive attitude among this group. In another important question pertaining to the curriculum containing related education, 48% said that the curriculum did cover the related aspects but a large 43.25% said that it should be included in the curriculum. All the students surveyed said that as health care personnel they can prevent oral cancer and help promote awareness about the adverse effects of tobacco consumption. And 74.25% of the students added a comment that they would provide health education to their patients and examine the patients more thoroughly for early changes of precancer and cancer. Next page 13 April-May, 2010 Issue 2 Vol 10 Contd from previous page....................... CONCLUSION :With the increasing burden of tobacco induced cancer, we as health professionals have a significant role in prevention and treatment of this lifestyle related disease. The nursing community forms a large pool of the health care fraternity. Their close association and frequency with dealing with patients and their families along with their knowledge about the disease process makes them indispensible in prevention and early detection of tobacco induced oral cancers. In conclusion most nursing students surveyed were aware about the adverse effects of tobacco but adequate training needs to be given in screening for oral cancer if early lesions are not to be missed. We suggest that oral cancer prevention and screening be an essential part of the nursing curriculum with both theoretical and practical demonstrations and active participation in tobacco cessation and cancer prevention programmes. With the combined efforts of the health care providers the menace of increasing oral cancer can definitely be controlled and the role of nursing community seems indispensible in prevention and early detection oral cancers. BIBLIOGRAPHY Reddy S, Gupta P. Report on Tobacco control in India executive summary Bobba R, Khan Y. Cancer in India An Overview. GOR Vol.5 No.4 ; 2003:93 -96. Murthy.N, Mathew. A. Cancer epidemiology, prevention and control. Current Science, Vol. 86 ; 2004:518-527 G.L. Lodi, A. Sardella and A. Carrassi. Oral Cancer Prevention and Dentists' Attitude towards Smoking. Oral Oncology, European Journal of Cancer, Vol. 318; 153: 1995 Comment. Oral cancer screening: 5 minutes to save a life. The Lancet. Vol 365; 2005:1905-06 R.Shankarnaryanan. Health care auxiliaries in the detection and prevention of oral cancer. Oral Oncology; 1997 :149- 154 Authors: Dr.Uzma Belgaumi1, Prof.(Dr.) Pushparaja Shetty2, Dr. Sreelatha S.V.3, Prof (Dr.) Pratima S. Rao4, Lal P. Madathil5 1Post Graduate,2Head of the Department and Professor,3Reader,4Professor,5Professor.Department of Oral Pathology and Microbiology, A.B. Shetty Memorial Institute Of Dental Sciences, Mangalore, Karnataka. Dentsply India announce CME Program on Endodontics and Implantology Dentsply India is honoured and extremely pleased to announce an International Speaker Program on Endodontics and Implantology from 10th to 13th May in Delhi, Bangalore and Mumbai. We would be fortunate to have with us Internationally renowned Endodontist Dr.Julian Weber, and famous Implantologist Dr.Weigl and Dr.Nentwig, who would be sharing the latest developments in their respective field of work. News brief 14 April- May 2010, Issue 2 Vol10 The SMILE that you always has dreamed now at your reach Before After LLis-Universal Composite Opallis Syringes Whiteness HP Maxx Bleach Whiteness Perfect i i l i S-201-204, IInd Floor, Vardhman Plaza, O & P Pocket, Dilshad Garden, Delhi - 110095 (INDIA) Phone No. +91 11-22131600, Tele-Fax . +91 11-43029499 Mobile: 09871077633 Email; jaishreesurgident@gmail.com JAISHREE SURGIDENT (INDIA) PVT. LTD. For membership & subscription details of Dental World, please send request at: dw_2000@rediffmail.com MAGNETISM IN ORTHODONTICS PROF. (DR.) U. S. KRISHNA NAYAK, DR. AZHAR MOHAMMED, DR. YATISH JOSHI, Dr. MANDAVA PRASAD, INTRODUCTION: The first known magnets were the lodestones, which were stones that were magnetized naturally. The Greeks and the Chinese were amused by the stones' ability to attract metal over a short distance, as if by magic. Later they learnt to use lodestones in compasses to determine direction. Today magnets are used extensively. E.g. in VCR's, audio cassettes, ATM and credit cards, and the electronics industry. The most commonly encountered magnet in our lives is the planet Earth itself. HISTORY: Magnet was originally discovered from a place called Magnesia in Greece when a shepherd named Magnes accidentally came across a stone which attracted iron nails in his shoes. According to Matasa, the first person to write a book on magnets was William Gilbert in 1600. It was William Gilbert who first realized that the Earth was a giant magnet. Serious use of magnets in medicine was reported in early 19th century. The first use of magnets in Dentistry was by Behran and Egan in 1953 who used it as implants for denture retention. The use of magnets for orthodontic tooth movement was first described by Blechman and Smiley who bonded earth magnets made of Aluminum- Nickel - Cobalt to the teeth of adolescent cats to produce tooth movement. Other rare earth magnets, Samarium. - Cobalt, introduced by Becker in 1970. PROPERTIES: 1) COULOMB'S LAW All magnets obey this law which states that the force between two magnetic poles is proportional to their magnitudes and inversely proportional to the square of the distance between them. F α m1 X m2 d2 2) CURIE POINT Rare earth magnets tend to loss their magnetism at room temperature. Pierre Currie observed that magnets tend to lose their properties if subjected to a specific temperature which causes their domain to return to random distribution. This point of temperature is called Currie Point. In Orthodontics, this has been overcome by using magnets which are combined with other elements so that they can be incorporated in appliances and also be heat sterilized. 3) ANISOTROPY This property allows single crystals to be preferentially aligned in one direction, thus increasing the magnetism. This resulted in magnets capable of producing high forces relative to their sizes. For rest of the article see next issue April-May, 2010 Issue-2 Vol-10 15 April-May, 2010 Issue-2 Vol-10 16 Published Printed Edited & Owned by Neeraj Kaushik. Published at 1001, 2nd floor, Kucha Natwan, Chandni Chowk, Delhi-110006. Printed at Sandhu Printing Press 3840, Kanhya Nagar, Tri Nagar, Delhi-110035. Reproduction of any part is prohibited. Dental World does not guarantee the quality & efficacy of commercial advertisements. The views expressed in the articles are of the authors and does not reflect the official view of Dental World. Slim X-ray Viewer-LED Based Regd off: 13, Shreshta Vihar, Vikas Marg Extn. Delhi-92 Works: 53A, Dilshad Garden, Opp. SBI, Delhi-95 Ph: 22597763, 22597767, Mobile: 9811330727, 9711118436 E mail: gdpdental@gmail.com Website: gdpdentalindia.com With 4 Vacuum Cycle Compact Simple to Use Newly launched X-Ray Magnifier Enclave-V 22 Please note that we have shifted our works and office at the below mentioned address. Ultraslim, thickness is only 19 mm. LED based with uniform light all over. Very low power conversion. Table top model with slide for holding the X-Ray film. (Magnification 2.5 X) Power consumption 5 watt. UNIKLAVE MINI UNIKLAVE PLUS UNIKLAVE SUPER GLASS BEADS STERILIZER Digital OPG X-ray Table Top Can be placed on the wall Overall Size: Length 320x Height 270x Depth 75 Screen Size:290mmx230mm Power Consumption 27 watt Capacity: 12 Ltr, 16 Ltr & 22 Ltr Enclave-V12/V16