Metal Crown Occlusal Reduction — NDEB AFK MCQ
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Correct answer: A — 1.5 mm
The minimum recommended occlusal reduction for a full-coverage metal crown is approximately 1.0-1.5 mm (functional cusps require slightly more reduction than non-functional cusps). This provides adequate thickness of metal for strength under occlusal loading without excessive removal of tooth structure. The reduction should follow the anatomical contour of the occlusal surface (two-plane reduction following cusp inclines) rather than a single flat cut. For metal-ceramic crowns, the occlusal reduction is 1.5-2.0 mm to accommodate both metal and porcelain.
Reference: Shillingburg – Fundamentals of Fixed Prosthodontics, 4th ed., 2012