Altered Cast Technique — NDEB AFK MCQ
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Correct answer: B — Altered cast (corrected cast) technique with selective tissue loading of the edentulous areas
The altered cast (corrected cast) technique is the preferred impression approach for Kennedy Class I and II distal extension RPDs. After the framework is fabricated on the initial cast and tried in the mouth, an impression of the distal extension ridge is taken through the framework's denture base area using a functional impression material (zinc oxide eugenol paste, elastomer). This captures the ridge under simulated functional load. The corrected cast replaces the edentulous area on the original cast, ensuring the denture base fits the ridge accurately under function.
Reference: Carr – McCracken's Removable Partial Prosthodontics, 13th ed., 2015