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Prosthodontics & Occlusion · single question

How should the shade for a crown be selected?

  1. At the patient's eye level with the tooth moist, early in the appointment
  2. Only under the dental operatory light
  3. After cementation, to verify the match
  4. After drying the teeth
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Correct answer: A. At the patient's eye level with the tooth moist, early in the appointment

  • A. Correct – select shade at the START of the visit, teeth kept MOIST, at eye level, under natural daylight, quickly (before retinal fatigue).
  • B. Incorrect – the unit light is too bright and causes glare; natural daylight is preferred.
  • C. Incorrect. Shade is selected before preparation/cementation; checking only after cementation is too late to correct a mismatch.
  • D. Incorrect – dehydrated teeth lose chroma/translucency and appear lighter, producing a mis-match.

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