Prosthodontics & Occlusion · single question
What type of tissue lines the POSTERIOR BORDER area (vibrating line) of a maxillary complete denture? [⚠️ Study Note: Source discrepancy between recall files]
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Correct answer: B. Nonkeratinized mucosa with minor salivary glands
⚠️ FLAGGED: Two recall sources differ on this. Most sources identify the vibrating line area as nonkeratinized mucosa containing minor salivary glands — the glands make this area slightly compressible and are important for the posterior palatal seal.
- A. The anterior hard palate (rugae area) is keratinized over cortical bone — NOT the posterior border.
- B. CORRECT (per most sources). The posterior palatal seal area at the vibrating line = nonkeratinized mucosa with minor salivary glands. These glands contribute to tissue compressibility aiding the posterior palatal seal.
- C. Nonkeratinized is correct, but the tissue here overlies cancellous (not cortical) bone at this posterior palatal region.
- D. Major salivary glands (parotid, submandibular, sublingual) are not located in the palate.
Note: ⚠️ Source discrepancy: One recall says 'nonkeratinized + minor salivary glands'; another says 'nonkeratinized + cancellous bone.' Both are partially correct. Best supported answer = nonkeratinized mucosa with minor salivary glands at the vibrating line.
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