Condylar asymmetry and its relation to age in a group of patients with a craniomandibular disorder of myogenous origin.

A group of patients with a myogenous origin of craniomandibular disorders was found to show a variation of condylar asymmetry with age. The curve obtained by plotting patient age against their asymmetry index was parabolic in nature. This differed from a group of patients with an arthrogenous origin of pain, where a linear correlation with age, with a negative slope, had previously been found. The mean asymmetry index for this group of patients was found to be 23.77%. This is higher than that reported for a group of patients with a craniomandibular disorder of arthrogenous origin, namely 18.76%. It appears that these two groups differ in the variation of condylar asymmetry with age..