Pathology · single question
Identifying dilaceration on a radiograph: which radiographic finding is most consistent with dilaceration?
Show answer and explanation
Correct answer: C. Sharp curvature or bend in the root
DILACERATION is a developmental anomaly characterized by an abrupt bend or curve (angular deformity) in the root or crown of a tooth, resulting from trauma or displacement of the developing tooth germ. On radiograph, dilaceration appears as a sharp BEND or ANGULATION in the root, which can be anywhere along the root length. This distinguishes it from the gradual curve of curved roots (curvature) or root curvature.
- A. INCORRECT. Missing/short root development is characteristic of dentin dysplasia type I or other developmental anomalies, not specifically dilaceration.
- B. INCORRECT. Enlarged pulp chamber is characteristic of taurodontism — not dilaceration.
- C. CORRECT. DILACERATION shows as a sharp BEND or ANGULATION in the root on radiograph — an abrupt directional change rather than a gradual curve. This represents a traumatic deformity of the forming tooth.
- D. INCORRECT. A horizontal chevron-shaped pulpal remnant is characteristic of DENTIN DYSPLASIA TYPE I (radicular dentin dysplasia).