Summary

Posterior glenoid osteotomy is a viable option in patients with recurrent PSI that have increased retroversion and havefailed non-operative or arthroscopic treatment.

Abstract

Background

Posterior shoulder instability (PSI) is becoming an increasingly recognised condition. A num-ber of different treatment modalities exist to treat PSI including arthroscopic or open surgeries whennon-operative treatment has failed. The primary aim of this systematic review was to analyse the rate ofrecurrent instability after posterior glenoid osteotomy (PGO) for recurrent PSI, while secondary aim wasto identify complication rate and the amount of retroversion correction.

Patients and methods: A review of the online databases MEDLINE and Embase was conducted on 1November 2019 according to PRISMA guidelines. The review was registered prospectively in the PROS-PERO database (Registration No. CRD42020161984). Clinical studies reporting either the recurrence rate,complications or amount of retroversion correction after PGO for PSI were included. The studies wereappraised using the Methodological Index for Non-Randomized Studies (MINORS) tool.

Results

The search strategy identified 9 studies eligible for inclusion. Of the 9 studies, 4 showed animprovement in retroversion with a mean change in retroversion of 10o. All 9 studies reported on recur-rence rate with an overall rate of 22%. Complications were discussed in only 7 of the studies with overallrate of 18.3%. The most common complication reported in the studies were degenerative changes of theglenohumeral joint (7.3%) and iatrogenic fractures (5.5%).

Conclusion

PGO is a viable option in patients with recurrent PSI that have increased retroversion and havefailed non-operative or arthroscopic treatment. It does however carry a significant risk of complications.