Complete Denture Posterior Border — NDEB AFK MCQ

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ModerateProsthodonticsComplete Denture Posterior BorderNDEB AFK

When fabricating a complete denture, which of the following landmarks defines the posterior extent of the maxillary denture base?

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Correct answer: D — Vibrating line (junction of hard and soft palate)

The posterior border (post-dam) of a maxillary complete denture is determined by the vibrating line, which marks the junction between the moveable soft palate and the immoveable hard palate. The vibrating line is identified by asking the patient to say 'ah' and marking where movement begins. The post-dam seal at this line prevents air ingress and enhances retention. The hamular notches define the lateral extent.

Reference: Zarb – Prosthodontic Treatment for Edentulous Patients, 13th ed., 2013