Biofeedback and relaxation therapy for chronic temporomandibular joint pain: predicting successful outcomes.

ABSTRACT: 57 patients with chronic temporomandibular joint (TMJ) pain were randomly assigned to receive either relaxation or biofeedback therapy. 27 Ss (mean age 35.6 yrs) listened to tape-recorded relaxation once a week at the therapist's office for 3 sessions and were encouraged to practice daily. 30 Ss (mean age 43 yrs) participated in biofeedback sessions and were instructed to practice relaxation for 20 min/day between sessions. Results show no significant differences in outcomes. However, successful Ss in the 2 conditions differed from each other. Successful relaxation Ss tended to be younger, had TMJ pain for a shorter period of time, and reported problems with other psychophysiologic disorders. Successful biofeedback Ss were older, married, had TMJ pain for a longer period of time, and had not received prior equilibration treatment. Equilibration and presence of other disorders were related to both short- and long-term outcomes, suggesting they may be useful as predictors of outcome. It is also suggested that knowledge of pretherapy factors may allow for optimal assignment to therapy conditions