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Endodontics · single question

During endodontic access restoration, why do you use dual-cure composite?

  1. Depth of increment (polymerization depth limitation)
  2. Better quality of restoration
  3. Better adhesion
  4. Lower cost
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Correct answer: A. Depth of increment (polymerization depth limitation)

DUAL-CURE composite is used for endodontic access restorations because light-cured composites have a MAXIMUM DEPTH OF CURE of approximately 2mm per increment. The access cavity can be deep and light cannot penetrate adequately to cure composite at the bottom. Dual-cure composites use BOTH light-activation AND chemical self-cure, ensuring complete polymerization regardless of depth. This is the primary reason — depth of increment limitation. A is correct.

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