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Oral Surgery · single question

An Ellis Class II fracture has which characteristics?

  1. Enamel, dentin, and pulp exposure — bleeding
  2. Sub-gingival fracture — requires crown lengthening
  3. Enamel only — no sensitivity to air
  4. Enamel and dentin exposure — sensitivity present, no pulp exposed
Show answer and explanation

Correct answer: D. Enamel and dentin exposure — sensitivity present, no pulp exposed

  • A. Incorrect. Enamel + dentin + pulp exposure = Ellis Class III (complicated crown fracture). Bleeding from the pulp exposure is seen.
  • B. Incorrect. A sub-gingival fracture extends below the gingival margin but is not part of the Ellis classification system for uncomplicated/complicated crown fractures.
  • C. Incorrect. Enamel only = Ellis Class I. No dentin exposure means minimal or no sensitivity.
  • D. Correct. Ellis Class II = ENAMEL + DENTIN fracture with NO pulp exposure. The exposed dentin causes sensitivity to temperature, air, and touch. The yellowish dentin is visible. Treatment: dentin protection (glass ionomer or bonding), and the tooth remains vital.

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