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Tuesday, March 17, 2009

105 MCQs in Prosthodontics

Tuesday, March 17, 2009

All of the following are correct statements concerning an occlusal rest, except

  1. the rest prep should extend one-half the buccolingual width of the tooth from cusp tip to cusp tip
  2. the rest prep should extend on-third to one-half the mesiodistal width of the tooth
  3. the rest seat is prepared such that the deepest portion is at the marginal ridge
  4. the rest measures between 1.0 to 1.5 mm thick where it crosses the marginal ridge
  5. the occlusal rest seat is prepared so that the enclosed angle formed by the floor of the rest seat and a line dropped down the proximal surface of the tooth must be less than 90 degrees
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