Prosthodontics and Occlusion Flashcards

Centric relation (CR) is best defined as:

Answer: The most superior, anterior position of the condyles in the glenoid fossae

Centric relation is the maxillomandibular relationship in which the condyles are in their most superior (and slightly anterior) position in the glenoid fossae, independent of tooth contact.

Canine-protected occlusion refers to:

Answer: The canines bearing all lateral excursive contacts while posterior teeth disclude

In canine-protected (mutually protected) occlusion, the canines bear and guide all lateral excursive forces, allowing the posterior teeth to disclude and be protected from lateral forces.

The Bonwill triangle in prosthodontics represents:

Answer: The relationship between condyles and the incisors forming an equilateral triangle

Bonwill's triangle is an equilateral triangle with 4-inch sides connecting the two condyles and the mesial contact point of the mandibular central incisors.

A facebow transfer records the relationship of:

Answer: Maxillary arch to the transverse hinge axis of the condyles

A facebow records the spatial relationship of the maxillary arch to the opening axis of the condyles (transverse hinge axis), allowing accurate mounting on an articulator.

The closest speaking space refers to:

Answer: The closest vertical relationship of upper and lower teeth during speech

The closest speaking space (1–2 mm) is the minimum distance between maxillary and mandibular teeth observed during phonation of sibilant sounds like 's'.

Residual ridge resorption after tooth extraction follows a pattern that is:

Answer: Greater in the mandible in all dimensions

The mandibular ridge typically resorbs 4 times faster than the maxilla overall, and resorption is greater in all dimensions in the mandible, making mandibular dentures more challenging.