Prosthodontics & Occlusion · single question
Where should the occlusal plane of the lower complete denture be positioned relative to the retromolar pad?
Show answer and explanation
Correct answer: C. At 2/3 the height of the retromolar pad
- A. Incorrect. '4 mm above' the retromolar pad is not the conventional guideline.
- B. Incorrect. '5.5 mm below' is not a standard reference for occlusal plane in complete denture fabrication.
- C. Correct. The occlusal plane of the mandibular complete denture should be positioned at approximately 2/3 (TWO-THIRDS) of the height of the RETROMOLAR PAD. This places the occlusal plane at a physiologically appropriate level for posterior occlusal contact, stability, and esthetics, while remaining in harmony with the buccinator mechanism.
- D. Incorrect. 1/4 of the retromolar pad height would position the plane too low.
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