Occlusion in Natural Dentition

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  1. 1. Ahsen Saeed, 1010
  2. 2. INTRODUCTION
  3. 3. JABLONSKI (1982) It is relationship between all components of masticatory system in normal function, parafunction and dysfunction including morphology, and functional features of contacting surfaces of opposing teeth and restorations, occlusal trauma, neuromuscular physiology, psychophysiological state and the diagnosis, prevention and treatment of functional disorders. DYNAMIC OCCLUSION (Davies and Gray) Refers to the occlusal contacts that are made whilst mandible is moving relative to the maxilla, the mandible being guided by muscles of mastication and anterior and posterior guidance mechanism of mandible, Anterior guidance of teeth which may touch during eccentric movement of mandible, posterior guidance, TMJ.
  4. 4. Flush terminal Distal step Mesial step
  5. 5. CENTRIC POSITION PROTRUSIVE POSITION LATERAL POSITION Working Nonworking Anterior and posterior teeth contact All maxillary and mandibular teeth contact Posterior teeth make contact Posterior teeth make contact.
  6. 6. CENTRIC POSITION PROTRUSIVE POSITION LATERAL POSITION Working Nonworking Posterior tooth make contact. Anterior teeth may or may not contact. Canine and posterior teeth disclude . Teeth contact (mostly desirable canine, premolar, mesiobuccal cusp of 1st molar) No tooth contacts.
  7. 7. CENTRIC POSITION PROTRUSIVE POSITION LATERAL POSITION Working Nonworking Only posterior tooth make contact. Anterior tooth have a space of minimum 30 microns. Canine and posterior teeth disclude . Mesial inclines of mandibular first premolar buccal cusps may contact. Maxillary canine guide the mandible. Posterior teeth disclude. No tooth contacts.
  8. 8. In lateral position, working side In protrusive position
  9. 9. ANY