*3.1. Postoperative Complications*

Thirteen patients (9%) suffered from postoperative complications: 6 (6%) in the HA group and 7 (37%) in the TSA group (OR = 9.9; 95% CI = (2.9; 34.4); *p* < 0.001). In the HA group, 2 painful glenoid wear complications were observed as well as 1 humeral shaft fracture, 1 coagulase-negative Staphylococcus infection, 1 cuff tear involving supraspinatus and subscapularis, and 1 ulnar nerve palsy which recovered in 3 months. In the TSA group, one patient had an immediate posterior dislocation with a metal-back glenoid.
