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Restorative & Materials · single question

A patient has very yellow natural teeth, with a single crown on tooth #12 that appears strikingly 'super white' and mismatched. Which shade-matching dimension is most fundamentally responsible for why this mismatch is so visually obvious?

  1. Value (lightness/darkness) — the human eye is most sensitive to value differences, so a crown that is much lighter/brighter than the surrounding darker, more saturated natural teeth stands out most starkly
  2. Chroma alone, with value playing no role
  3. Translucency alone, with no color component involved
  4. Surface texture alone
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Correct answer: A. Value (lightness/darkness) — the human eye is most sensitive to value differences, so a crown that is much lighter/brighter than the surrounding darker, more saturated natural teeth stands out most starkly

Value (the relative lightness or darkness of a color, independent of hue or chroma) is widely taught as the single most important and most perceptible shade-matching dimension — the human eye detects value mismatches more readily than hue or chroma mismatches. A crown that reads as much lighter/brighter ('super white') against much darker, more yellow-saturated natural teeth will stand out primarily because of this value contrast, even though hue and chroma differences contribute as well.

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