Prosthodontics & Occlusion · single question
A bruxist needs a porcelain veneer. What is the MOST appropriate incisal margin preparation?
Show answer and explanation
Correct answer: C. Shoulder margin
For a bruxist, a shoulder margin at the incisal edge provides the most support and material bulk to resist heavy occlusal forces.
- A. ❌ Bevel creates even thinner ceramic; contraindicated in bruxers.
- B. ❌ Knife-edge creates the thinnest, most fragile margin; worst choice for a bruxer.
- C. ✅ CORRECT – Shoulder margin provides adequate ceramic bulk to resist bruxing forces.
- D. ❌ Feather/chamfer results in thin porcelain at the incisal, prone to fracture under bruxing forces.
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