This narrative review by Denard and Walch examines surgical options for the B2 (biconcave) glenoid in primary glenohumeral arthritis—a morphology defined by posterior glenoid erosion and posterior humeral head subluxation that poses unique challenges for shoulder arthroplasty. The review synthesizes outcomes data for hemiarthroplasty, anatomic TSA with various correction strategies, and primary reverse shoulder arthroplasty.
When you encounter a B2 glenoid on preoperative CT, measure neoglenoid retroversion and posterior humeral head subluxation using the scapular axis method: values ≥27° retroversion or ≥80% subluxation signal high risk for TSA failure and should prompt serious consideration of primary reverse shoulder arthroplasty, particularly in older patients.
This narrative review by Denard and Walch examines surgical options for the B2 (biconcave) glenoid in primary glenohumeral arthritis—a morphology defined by posterior glenoid erosion and posterior humeral head subluxation that poses unique challenges for shoulder arthroplasty. The review synthesizes outcomes data for hemiarthroplasty, anatomic TSA with various correction strategies, and primary reverse shoulder arthroplasty.
When you encounter a B2 glenoid on preoperative CT, measure neoglenoid retroversion and posterior humeral head subluxation using the scapular axis method: values ≥27° retroversion or ≥80% subluxation signal high risk for TSA failure and should prompt serious consideration of primary reverse shoulder arthroplasty, particularly in older patients.