Restorative & Materials · single question
In a porcelain veneer preparation, which third is most commonly under-prepared / most prone to failure?
Show answer and explanation
Correct answer: A. Incisal third
- A. Correct – the incisal third is most often under-reduced, leaving thin/over-contoured porcelain that fractures under incisal load.
- B. Incorrect – a common margin-finish concern but not the classic under-prep/failure site.
- C. Incorrect – generally adequately reduced.
- D. Incorrect. Veneers do fail, and the incisal third is the classic site of under-reduction and fracture/chipping.
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