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Flabby Ridge Impression — ORE Part 1 MCQ

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HardProsthodonticsFlabby Ridge ImpressionORE Part 1

An edentulous patient requires a maxillary complete denture. Examination shows a broad, mobile fibrous ridge in the anterior maxillary alveolus, with firm posterior denture-bearing tissues. Which impression modification is most appropriate?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: A — Use a windowed custom tray and record the mobile area with light-body material

**A is correct.** The anterior ridge is mobile and displaceable, whereas the posterior tissues are firm. A windowed custom tray permits the firm denture-bearing tissues to be recorded conventionally while the flabby segment is recorded separately with low-viscosity material and minimal pressure. This reduces distortion of the mobile tissue; otherwise, elastic rebound after impression making can compromise denture fit and stability. **B** still risks displacement because heavy-body material is relatively viscous. **C** does not provide controlled selective pressure or a stable custom-tray design. **D** records the fibrous ridge in a compressed, displaced position. **E** similarly applies pressure across all tissues and is inappropriate for a localised flabby ridge. The key discriminating feature is selective, minimally displacing recording of the anterior mobile tissue.

Reference: Habib S, Alshehri WS, Alyousef S. Window Technique for the Final Impression of a Maxillary Flabby Ridge: A Case Report of an Edentulous Patient. Cureus. 2025. https://pubmed.ncbi.nlm.nih.gov/39822250/