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Composite polymerisation failure — NDEB AFK MCQ

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ModerateRestorativeComposite polymerisation failureNDEB AFK

A posterior composite restoration remains tacky and wears rapidly. Review shows the curing light may have low output, the composite was placed in 5 mm increments, and a dark shade was used. What is the most appropriate investigation?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: E — Check curing-light irradiance and placement protocol

Low curing output, thick increments, and dark shade raise concern about inadequate polymerisation, so checking curing-light irradiance and placement protocol is the most useful investigation. Percussion testing or panoramic imaging would not assess the material failure mechanism. The pearl is to maintain and test curing lights, and to place composites in increments suitable for the material and shade.

Reference: Dental materials reference texts; NDEB KSAs 2024