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Pathology · single question

What is the characteristic feature of dilaceration?

  1. An abrupt, sharp bend or angulation of the root or crown
  2. A smooth, straight root
  3. Shallow enamel ridges
  4. Multiple accessory root canals
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Correct answer: A. An abrupt, sharp bend or angulation of the root or crown

  • A. Correct. DILACERATION is an abnormal, ABRUPT ANGULATION or sharp bend in the root (or between crown and root) of a formed tooth. It results from mechanical trauma to the developing tooth germ — classically trauma to a primary incisor that displaces the underlying permanent successor's partially calcified crown relative to its still-forming root. Clinical relevance: it complicates extraction and endodontic instrumentation, and may prevent eruption.
  • B. A straight root is normal morphology, not dilaceration.
  • C. Enamel ridge morphology is unrelated.
  • D. Multiple canals describe accessory/lateral canal anatomy, not dilaceration.

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