Custom Provisional Crown — NDEB AFK MCQ
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Correct answer: A — Custom bis-acryl composite provisional fabricated with a putty index from diagnostic wax-up
A custom bis-acryl composite provisional crown fabricated from a silicone putty index (taken from the diagnostic wax-up or the pre-operative tooth) provides the best marginal adaptation, anatomical contour, occlusion, and aesthetics. The putty captures the exact pre-operative or ideal tooth morphology and is used as a matrix to form the provisional. Bis-acryl materials (e.g., Protemp, Luxatemp) have excellent mechanical properties, colour stability, and low exothermic heat during setting. Pre-formed crowns (polycarbonate, stainless steel) have limited aesthetic and marginal adaptation.
Reference: Shillingburg – Fundamentals of Fixed Prosthodontics, 4th ed., 2012