RPD Food Packing Reduction — ORE Part 1 MCQ

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EasyProsthodonticsRPD Food Packing ReductionORE Part 1

A patient wearing a lower removable partial denture reports that food repeatedly collects between the denture and adjacent natural teeth. Which design feature is most likely to reduce this problem?

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Correct answer: C — Provide intimate contact between guide planes, framework and saddle flanges

Explanation lettering: D = shown as A · C = shown as B · A = shown as C · E = shown as D · B = shown as E

**A is correct.** Food packs where there are gaps between the fitting surface of the removable partial denture (RPD) and the teeth or ridge. Parallel guide planes and intimate adaptation of the framework and saddle flanges to their intended surfaces reduce such empty spaces and also improve stability. Option B deliberately creates the space that promotes food retention. Option C may make the clasp more bulky but does not seal or eliminate a gap; it may also worsen plaque retention. Options D and E reduce flange/base extension and therefore do not address the cause of food packing, while potentially reducing support and stability. The key principle is accurate RPD design and fit, rather than loosening or reducing the prosthesis.

Reference: Kim JH, et al. The path of placement of a removable partial denture: a microscope based approach to survey and design. Journal of Advanced Prosthodontics. 2015. https://pubmed.ncbi.nlm.nih.gov/25722842/