Arthroscopic Reduction and Fixation of Impacted Humeral Head Reverse Hill-Sachs Fracture With Absorbable Anchors for Acute Traumatic Posterior Shoulder Dislocation.

A minimally invasive technique is presented for the treatment of acute traumatic posterior shoulder dislocation with a reverse Hill-Sachs lesion. Arthroscopic reduction was combined with internal fixation using 1 absorbable anchor. Under high-definition arthroscopic visualization, precise anatomical reduction of the impacted anteromedial humeral head compression fracture was achieved. Absorbable anchors were inserted into the subchondral bone defect beneath the reduced fragment. Initial stability was provided, and congruity of the articular surface is maintained. Compared with conventional approaches, several advantages were shown. First, anatomical restoration and functional preservation were achieved. The osseous morphology of the humeral head was restored, and the subscapularis tendon was preserved. Postoperative recovery of shoulder function, particularly internal rotation, was facilitated. Second, minimal invasiveness and biocompatibility were emphasized. Tissue trauma was reduced, and visualization was improved. Mechanical support was provided during early healing, followed by gradual degradation of the implants and progressive load transfer to newly formed bone. Long-term risks associated with metallic implants were avoided, including secondary removal and stress shielding. Finally, concomitant injuries could be managed concurrently under arthroscopic guidance.