Veneer Preparation Depth — ORE Part 1 MCQ

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EasyRestorative DentistryVeneer Preparation DepthORE Part 1

A patient is having a conventional porcelain veneer prepared on the upper left central incisor. What labial reduction should usually be planned?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — About 0.5 mm, aiming to remain in enamel

Explanation lettering: D = shown as A · A = shown as C · E = shown as D · C = shown as E

**A is correct.** For a conventional porcelain laminate veneer, approximately 0.5 mm of labial reduction is the usual target, with the aim of maintaining an enamel-bonded preparation. Evidence from maxillary central incisors found that a 0.4–0.6 mm reduction was largely intra-enamel, apart from the cervical region. This creates space for ceramic without producing an overcontoured restoration. Options B, C and D are unnecessarily destructive for a routine veneer and make dentine exposure more likely; bonding to enamel is preferred. Option E is incorrect because a no-preparation veneer is a case-specific alternative, not the usual approach irrespective of existing tooth contour and the required ceramic space.

Reference: Cherukara GP, Davis GR, Seymour KG, et al. Dentin exposure in tooth preparations for porcelain veneers: a pilot study. Journal of Prosthetic Dentistry. 2005. https://pubmed.ncbi.nlm.nih.gov/16275300/