Craniomandibular disorders in psoriatic arthritis. Correlations between subjective symptoms, clinical signs, and radiographic changes.

One hundred and ten patients with psoriatic arthritis (PA group) and 110 individually matched control subjects (C group) without general joint or skin disease were studied to determine correlations between radiographic changes, detected on orthopantomography, in the condyle of the temporomandibular joint and subjective symptoms and clinical signs of craniomandibular (CM) disorders. In the PA group there was a correlation, not found in the C group, between the radiographic changes, especially erosions, and subjective symptoms and clinical signs of CM disorders. The correlations found indicate that in PA subjective symptoms, clinical signs, and radiographic changes in the stomatognathic system are mainly caused by the systemic joint disease.