Formation of double contour in the human mandibular condyle. A case report

This is the first report of double contour formation in the human mandibular condyle that includes both radiographic and histologic confirmation. Panoramic radiographs showed an additional cortical layer formation on the posterior of the condyle during follow-up after displacement of the condyle. Two cortical layers on the posterior portion of the condyle were demonstrated on the histologic specimen. The outer layer consisted of a few lamellated bone layers and included many osteocytes. However, minimal fibroconnective tissue was seen, and there was no cartilage layer. We concluded that the double contour formation was not caused by endochondral ossification but by periosteal bone formation.