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Selective Pressure Impression — NDEB AFK MCQ

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HardProsthodonticsSelective Pressure ImpressionNDEB AFK

In the context of removable prosthodontics, what is the purpose of selective pressure impression technique for a mandibular distal extension RPD?

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Correct answer: B — To capture the edentulous ridge under load (functional impression) while relieving pressure over bony prominences

The selective pressure (altered cast/corrected cast) impression technique for distal extension RPDs captures the edentulous residual ridge under functional load (simulating the forces the ridge will bear during function) while relieving pressure over non-stress-bearing areas (mylohyoid ridge, genial tubercles, tori). This ensures better tissue support, reduces residual ridge resorption, and improves the fit and comfort of the distal extension denture base compared to a conventional impression taken under minimal pressure.

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