Restorative & Materials · single question
Which shade of composite takes LONGER to light cure?
Show answer and explanation
Correct answer: A. D3
- A. Correct. DARKER and MORE OPAQUE composite shades (D3, B4, A4) require LONGER cure times. The added pigmentation and opacity in darker shades absorb and scatter more of the curing light, reducing light penetration and slowing photoinitiator activation. D3 is among the darkest shades and therefore requires the longest cure time.
- B. Incorrect. A1 is a light, high-value shade that cures quickly.
- C. Incorrect. D2 is a darker shade but D3 is even darker, requiring more cure time.
- D. Incorrect. C3 is a lighter shade that cures more readily than D3.
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