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Restorative & Materials · single question

Metamerism in shade matching is best described as:

  1. Two objects matching under one light source but appearing different under another
  2. A permanent color change of porcelain over time
  3. The translucency of enamel at the incisal edge
  4. The fluorescence of a tooth under UV light
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Correct answer: A. Two objects matching under one light source but appearing different under another

  • A. Correct. Metamerism is when two colors match under one illuminant but mismatch under a different light source. To avoid it, evaluate shade under multiple/standardized (color-corrected) lighting conditions.
  • B. Metamerism is not a permanent color change of the material.
  • C. Translucency is a separate optical property.
  • D. Fluorescence is emission of light under UV, a different phenomenon.

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