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Restorative & Materials · single question

How is a bevel used in a Class V cavity preparation?

  1. A bevel on the gingival margin only
  2. A counter-bevel on all margins
  3. No bevel is placed in Class V preparations
  4. A 45-degree bevel on the incisal margin only
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Correct answer: C. No bevel is placed in Class V preparations

  • A. Incorrect. A gingival bevel alone is not the standard for Class V preparations.
  • B. Incorrect. A counter-bevel is not a standard technique for Class V restorations.
  • C. CORRECT. Class V preparations (cervical lesions) do NOT receive a bevel. Since Class V involves the cervical area where enamel may be thin or absent (cementum/dentin only), bevels are contraindicated — they would weaken the marginal ridge and, in composite restorations, acid-etching enamel rods in the gingival area may not be effective. A butt-joint margin is used.
  • D. Incorrect. A single-margin bevel is not standard for Class V.

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