RPD Rest Seat Function — NDEB AFK MCQ

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EasyProsthodonticsRPD Rest Seat FunctionNDEB AFK

What is the primary purpose of the rest seat in a removable partial denture?

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Correct answer: A — To direct occlusal forces along the long axis of the abutment tooth

The rest (and rest seat preparation) has the primary function of directing occlusal forces along the long axis of the abutment tooth, thereby transmitting forces favourably through the periodontium. A positive rest seat prevents the RPD from settling and impinging on soft tissue. Rest seats should be at least 1.5 mm deep (rounded concavity) with a floor that slopes towards the centre of the tooth.

Reference: Carr – McCracken's Removable Partial Prosthodontics, 13th ed., 2015