INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the recommended reduction for the mid-facial of a porcelain veneer?

0.5mm
0.3mm
1mm
2mm

The correct answer is: 0.5mm

When preparing a tooth for a porcelain veneer, it is essential to consider the recommended reduction to ensure the proper fit of the restoration. The mid-facial reduction for a porcelain veneer typically ranges from 0.3mm to 0.5mm. This reduction allows adequate space for the veneer to be bonded seamlessly onto the tooth while maintaining a natural appearance. Options C (1mm) and D (2mm) suggest excessive reduction, which can compromise the structural integrity of the tooth and may result in unnecessary removal of healthy tooth structure. It is crucial to preserve as much natural tooth structure as possible while still achieving a proper fit for the veneer. Therefore, option A (0.5mm) is the recommended reduction for the mid-facial of a porcelain veneer as it strikes a balance between conserving tooth structure and providing sufficient space for the veneer.