Arthroscopically assisted conversion of total shoulder arthroplasty to hemiarthroplasty with glenoid bone grafting.

Aseptic loosening of the glenoid component after total shoulder arthroplasty presents a considerable treatment challenge in the setting of substantial glenoid bone loss. Glenoid component explantation and bone grafting of defects have become common methods of recreating bone stock in hopes of preventing later fractures, maintaining joint kinematics, and allowing for later glenoid reimplantation if necessary. Although this has been traditionally accomplished via open techniques, this article describes an arthroscopic-assisted method of glenoid explantation and bone grafting for cases of aseptic glenoid loosening with contained bone defects.