Temporomandibular joint morphology in two Australian aboriginal populations.

The morphology of the temporomandibular joints in two Australian populations with previously established differences in patterns of tooth wear and craniofacial morphology did not differ significantly from that described in other comparable populations. The relationships between age and linear and angular measures of joint form were generally not significant, but the shape of the mandibular condyle was age-related, with flattening and cavitation of the posterior and medial aspects being more common in older age groups. Comparison of tooth-wear data in groups with different mandibular condylar shapes suggested that rapid anterior tooth wear was associated with flattening or cavitation of the condyle, while relatively rapid posterior tooth wear was more commonly associated with a convex condylar shape.