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Postoperative sensitivity after composite — NDEB AFK MCQ

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HardRestorativePostoperative sensitivity after compositeNDEB AFK

A 30-year-old has sharp sensitivity to cold after a deep posterior composite. The occlusion is normal, radiograph shows no overhang, and the restoration was placed after visible saliva contamination during bonding. What is the most likely cause/mechanism?

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Correct answer: A — Microleakage from bonding contamination

Saliva contamination during bonding can impair adhesion and create microleakage, causing postoperative cold sensitivity. A tight contact may cause flossing difficulty but does not best explain thermal sensitivity after a contaminated bond. The pearl is that isolation is a biological and materials requirement, not merely a convenience.

Reference: Restorative dentistry and dental materials reference texts; NDEB KSAs 2024