MRI evaluation of the effect of stabilization splints in patients with TMJ closed lock

Abstract

Fourteen patients (17 joints) with TMJ closed lock treated by stabilization splints, were evaluated with regard to condyle movement and changes in the disc and bone by means of MR imaging before and after treatment.
In all 13 joints that responded to treatment, condyle mobility increased after treatment. Disc displacement and deformity progressed in 3 joints. Disc reduction was seen in 2 joints, and although 11 joints were still locked, disc mobility improved in association with structural changes. In 4 joints with no response to treatment, these changes were not seen. Pseudodisk formation and osseous changes were not observed in any patient.
These results suggest that the use of stabilization splints in patients with closed lock may promote disc reduction and increase condylar and disc mobility even when the disc is still locked.