Surgical treatment of locked posterior shoulder dislocations with modified McLaughlin procedure: Case series and review of treatment possibilities of reverse Hill-Sachs defect.

The aim is to draw attention to the presence of posterior traumatic glenohumeral dislocations of the shoulder joint, which may sometimes present as missed injuries. The retrospective study reports a cohort of 9 patients operated on between 2010 and 2020 due to locked posterior traumatic dislocation of the shoulder joint with the reverse Hill-Sachs defect. The modified McLaughlin procedure was performed in all cases. No failure of the reconstruction was observed. Removal of fixation screws was performed in 1 patient due to migration. The average Constant-Murley score during the mean follow-up period of 5.7 years resulted in 76 points. Comparing the relationship between angles characterising the location of the reverse Hill-Sachs defect, the defects enlarge toward the anterior margin. Non-anatomical reconstruction with lesser tubercle transfer results in satisfactory outcomes in reverse Hill-Sachs defects involving up to 35% of the articular surface of the humeral head.