A porcelain veneer is planned. Which finish line is appropriate at the INCISAL aspect of the preparation?

Correct answer: A. A chamfer

• A. ✅ CORRECT — Veneer preparations are conservative and confined to enamel. A light CHAMFER produces a smooth, definite margin with adequate bulk for the porcelain while removing minimal tooth structure — appropriate at the incisal and cervical margins.
• B. ❌ A shoulder with a bevel is used for metal-ceramic crowns; it removes far more tooth structure than a veneer requires.
• C. ❌ A deep shoulder is the margin for an all-ceramic CROWN, not a veneer.
• D. ❌ A knife-edge margin gives the ceramist no discernible finish line and leaves the porcelain edge too thin to survive.

Note: A light chamfer is the conservative, widely taught choice for veneer margins; incisal coverage design (window vs. butt joint vs. wrap) is a separate decision.