Prosthodontics & Occlusion · single question
A patient with bruxism needs a posterior crown. Which material is the best choice for fracture resistance?
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Correct answer: B. Monolithic zirconia
- A. Feldspathic/glass ceramics are weakest and prone to fracture under heavy parafunction.
- B. Correct. Monolithic (full-contour) zirconia has the highest flexural strength and is the most fracture-resistant option for a bruxer.
- C. Lithium disilicate is strong but lower in flexural strength than monolithic zirconia for heavy occlusal loads.
- D. PFM can chip porcelain at the occlusal contacts under bruxing forces.
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