Radiofrequency capsular shrinkage for voluntary shoulder instability

We report a prospective study of 13 consecutive shoulders treated exclusively with radiofrequency capsular shrinkage for voluntary instability. Before surgery, voluntary instability had ceased in all patients with physiotherapy, but involuntary shoulder instability continued. The mean follow-up was 45 months (range, 32-57 months). According to the system of Rowe et al, the results were excellent in 3 shoulders (23.1%), fair in 1 (7.7%), and poor in 9 (69.2%). All 4 shoulders that had previous stabilization surgery had a recurrence of instability. Of the 6 shoulders with fair and poor Rowe ratings that had no previous stabilization surgery, 4 had a repeat capsular shrinkage. Two of these four shoulders had an excellent Rowe rating at final review. Overall, 5 of 9 patients (55.6%) with no previous surgery achieved stability by radiofrequency stabilization. In conclusion, results of radiofrequency capsular shrinkage in voluntary shoulder instability are poor. Results are improved with repeat capsular shrinkage. Radiofrequency capsular shrinkage is not recommended for patients who have had previous stabilization surgery.