Prosthodontics & Occlusion · single question
In a mandibular RPD with teeth #19 through #29 present, where is support primarily provided?
Show answer and explanation
Correct answer: B. Occlusal rest on tooth #22
- A. Proximal plates provide indirect retention and minor stabilization but not primary support.
- B. Correct. In a tooth-supported partial denture, support (resistance to vertical forces directed apically) is provided primarily by OCCLUSAL RESTS on the abutment teeth. An occlusal rest on tooth #22 (lower canine) would provide this support in a tooth-supported design.
- C. Mucosal support is characteristic of complete dentures; in a tooth-supported RPD, support comes from occlusal rests.
- D. The lingual bar is the major connector — it connects components but does not provide primary support.
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