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Buccal Shelf Stress-Bearing — NDEB AFK MCQ

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ModerateProsthodonticsBuccal Shelf Stress-BearingNDEB AFK

Which of the following correctly describes the 'buccal shelf' area of the mandible in complete denture prosthodontics?

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Correct answer: B — The primary stress-bearing area of the mandibular denture, located between the mandibular buccal frenum and the anterior border of the masseter muscle

The buccal shelf is the primary stress-bearing area of the mandibular complete denture. It is located on the buccal aspect of the mandibular body, between the buccal frenum (anteriorly) and the anterior border of the masseter muscle (posteriorly), bounded medially by the crest of the residual ridge and laterally by the external oblique ridge. The cortical bone in this area is dense and covered by keratinised mucosa, making it well-suited to bear occlusal loads. The denture base must extend over the buccal shelf for optimal support.

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