Hassanin Alkaduhimi - ۱ Massachusetts General Hospital, Orthopaedic Sports Department, Harvard Medical School, Boston, Massachusetts, U.S.A ۲ Orthopaedic Department, Amphia Ziekenhuis, Breda, the Netherlands
N.F.J. Hilgersom - ۱ Massachusetts General Hospital, Orthopaedic Sports Department, Harvard Medical School, Boston, Massachusetts, U.S.A
Denise Eygendaal - Orthopaedic Department, Amphia Ziekenhuis, Breda, the Netherlands ۳ Orthopaedic Department, Academic Medical Center, Amsterdam, the Netherlands
M.P.J. van den Bekerom - Shoulder and elbow unit, Joint Research, OLVG Amsterdam, the Netherlands
Luke Oh - Massachusetts General Hospital, Orthopaedic Sports Department, Harvard Medical School, Boston, Massachusetts, U.S.A

Background: This study aimed to assess the results after soft-tissue posterior instability surgery and address possible challenges during these operations.Methods: The databases of two tertiary hospitals were reviewed to identify patients treated for posterior shoulder instability between ۲۰۰۰ and ۲۰۱۵. Out of ۱۹۸ treated patients, ۱۹ cases underwent surgery with a mean follow-up of ۳۵ months. Chart review was performed to obtain recurrence rates, revision rates, return to sport, persistent pain, subjective instability, subjective feeling of being better, complications, and range of motion after operative treatment of posterior shoulder instability. These outcomes were compared using the Fisher’s exact and Mann-Whitney U tests. Results: After surgery, ۶ (۳۲%) patients had a recurrent subluxation, and ۱۱ (۵۸%) cases had persistent pain; moreover, ۵ (۲۶%) patients had a persistent feeling of instability, and ۱۰ (۵۳%) cases did not feel improvement after the operation. Furthermore, ۱۰ (۵۳%) patients required a revision, and there were ۷ (۳۷%) cases with a complication. Postoperatively, ۷۵% of the patients had a full forward flexion, and ۹۳% of the cases had full internal rotation; however, ۶۴% of them had restrictions in external rotation. Conclusion: There is a high rate of recurrent instability, need for revision, and complications after soft-tissue posterior instability surgery. Postoperative external rotation was impaired in most patients. Patients should be informed about these unsatisfactory results. Level of evidence: IV

Bankart, Dislocation, glenohumeral, Instability, posterior, shoulder, Soft-tissue Surgery