Composite Polymerisation Shrinkage — NDEB AFK MCQ
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Correct answer: D — 1-5%
Polymerisation shrinkage of modern dental composites ranges from approximately 1-5% by volume, depending on the filler loading, resin matrix composition, and curing conditions. This shrinkage generates stress at the tooth-restoration interface, potentially leading to gap formation, microleakage, post-operative sensitivity, secondary caries, and cusp deflection. Incremental placement techniques, low-shrinkage composites, and bulk-fill materials are strategies to manage polymerisation stress.
Reference: Anusavice – Phillips' Science of Dental Materials, 13th ed., 2022