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Interocclusal/ online orthodontic courses

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Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.

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  • 1. 1 www.indiandentalacademy.com
  • 2. 2 IMPORTANCE AND RELEVANCE OF INTER OCCLUSAL RECORDS IN FIXED PROSTHODONTICS INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.com
  • 3.  Physiological method.  The kinesthetic sense or muscle sense helps to direct movements of parts of body through space.  It is one of the methods of recording centric relation . 3 www.indiandentalacademy.com
  • 4.  Inter occlusal record : registration of the positional relationship of the opposing teeth or arches  A record of the positional relationship of the teeth or jaws to each other. 4 www.indiandentalacademy.com
  • 5.  Centric inter occlusal record- a record of centric jaw position 5 www.indiandentalacademy.com
  • 6.  Eccentric inter occlusal record – a record of jaw position other than centric  Lateral –record of lateral eccentric jaw position  Protrusive – record of protruded eccentric jaw position . 6 www.indiandentalacademy.com
  • 7.  Centric inter occlusal records  Eccentric inter occlusal records  lateral inter occlusal records  protrusive inter occlusal records 7 www.indiandentalacademy.com
  • 8.  Active techniques  Passive techniques  DIRECT  INDIRECT 8 www.indiandentalacademy.com
  • 9.  Impression plaster  zinc oxide eugenol  waxes  elastomers  acrylic resins  Impression compound 9 www.indiandentalacademy.com
  • 10.  Limited resistance before setting to avoid displacing teeth or mandible during closure.  Rigid after setting  Minimum dimensional change  Accurate record of incisal & occlusal surfaces  Easy to manipulate  No adverse effect on tissue  Records should be verifiable 10 www.indiandentalacademy.com
  • 11.  According to Dawson, the criteria for accuracy in making interocclusal records include the following points:  1. The recording material must not cause any movement of teeth or displacement of soft tissues.  2. The recording material must fit cast as accurately as it fits the teeth intra-orally.  3. The accuracy of the jaw relation record should check in the mouth and on the casts 11 www.indiandentalacademy.com
  • 12.  Amount and equalization of pressure ,  uniform consistency of recording material .  Comfort of patient ,.  styli or cusp tips are better than occlusal rims or non functional cusps. 12 www.indiandentalacademy.com
  • 13.  THE PRECISE RELATION of maxillary and mandibular casts is an essential step in developing accurate occlusion in fixed prosthodontics. 13 www.indiandentalacademy.com
  • 14.  When an adequate number of opposing teeth and stable intercuspation exist, direct occlusion of the casts is the most accurate method of articulation 14 www.indiandentalacademy.com
  • 15.  In the absence of definitive occlusal contacts for direct relation of the casts, an interocclusal record is required.  This becomes even more important when the distal tooth in the arch is also an abutment in the fixed partial denture. 15 www.indiandentalacademy.com
  • 16.  To direct the occlusal forces along long axis of the teeth.  To attain simultaneous contact of all teeth in centric relation 16 www.indiandentalacademy.com
  • 17.  To eliminate any occlusal contact on inclined planes to enhance the positional stability of the teeth.  To have centric relation coincide with maximum intercuspation position. 17 www.indiandentalacademy.com
  • 18.  To arrive at the occlusal scheme selected for the patient [unilateral balanced vs. mutually protected] 18 www.indiandentalacademy.com
  • 19.  In the absence of the patient casts will provide us a great information if they are articulated properly for this a good interocclusal record is needed 19 www.indiandentalacademy.com
  • 20.  When 1 or 2 areas of tripod is missing when articulating the casts  To check for any centric interferences in patients 20 www.indiandentalacademy.com
  • 21.  Ideally thick  Very rigid materials  Passivity 21 www.indiandentalacademy.com
  • 22.  Too much force can cause compression of the elastic record,  while too little force can allow for inadequate seating 22 www.indiandentalacademy.com
  • 23.  We should hold the wax wafer up to the light to see whether there is any penetration.  Rechecking in patients mouth 23 www.indiandentalacademy.com
  • 24.  Failure to capture an accurate interocclusal record  1. Time-consuming chairside adjustments,  2. The need for remounting casts  3. and possible refabrication of the prosthesis. 24 www.indiandentalacademy.com
  • 25.  DIFFICULTIES IN RECORDING INTEROCCLUSAL RECORDS  1. Biologic characteristics of the stomatognathic system  2. Dentist induced causes  3. Inherent properties of the record material.   25 www.indiandentalacademy.com
  • 26.  This includes the anatomic and physiologic characteristics of the patient, which includes:  1. Vertical displacement of the condyles  2. Displacement of the teeth due to the flexibility of the periodontal attachments  3. Flexing of the mandible during opening and closing movements  4. Compression of soft tissues in the edentulous areas  5. Mandibular positional variation due to muscular activity  6. Inaccuracies related to displacement of mobile teeth while registering the record. 26 www.indiandentalacademy.com
  • 27.  DENTIST INDUCED CAUSES  This relates to the variations in the manner with which the dentist manages the patient and the material during the clinical phase.   27 www.indiandentalacademy.com
  • 28.  INHERENT PROPERTIES OF THE RECORD MATERIAL  This primarily involves:  The dimensional changes caused by temperature, humidity and time.  Polymerization shrinkage.  Chemical reactions.  Stress and mechanical manipulation, which occurs during the procedures necessary to make the record. 28 www.indiandentalacademy.com
  • 29.  Cerec, and lava technology 29 www.indiandentalacademy.com
  • 30. 30 www.indiandentalacademy.com
  • 31.  It is apparent that there is not one type of interocclusal record that is fast, accurate, and easy to make that is indicated for all clinical situations  Today the mostly used interocclusal record materials are waxes and vinylsiloxane materials.  depending on handling, situation , type of material used interocclusal records provide us a great detail Despite the advantages and dis-advantages of them 31 www.indiandentalacademy.com
  • 32.  1. Herbert. T. shillingburg 3rd edition  2. Peter. E .Dawson 2nd edition  3. Stephen . F. Rossensteil 3rd edition  3. An improved interocclusal record of centric relation Carl G. At all. J. Prosth. Dent.March, 1971  A Simplified Technique for Making an Interocclusal Record in Fixed Prosthodontics. J. Prosth. Dent, August 2005 32 www.indiandentalacademy.com
  • 33. 33 Thank you For more details please visit www.indiandentalacademy.com www.indiandentalacademy.com