Prosthodontics & Occlusion · single question
What type of finish line is used at the incisal edge of a porcelain veneer preparation?
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Correct answer: B. Beveled chamfer
- A. Knife edge is used for cast metal crowns and does not provide adequate porcelain bulk.
- B. The incisal edge of a veneer preparation uses a beveled chamfer (incisal bevel). This allows porcelain to feather to a thin edge, providing good esthetic transition and structural support.
- C. A chamfer is used at the gingival margin of veneer preparations; the incisal edge requires a different design.
- D. A shoulder finish line is used for full-coverage crowns (PFM/all-ceramic).
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