Quantification of B2 glenoid morphology in total shoulder arthroplasty

摘要: Background B2 glenoid morphology is challenging to address with shoulder reconstruction. Deformity often renders current techniques inadequate, necessitating compromises that limit long-term implant durability. The purpose of this study was perform in vivo measurements deformity better appreciate the orientation biconcavity demarcation and erosion surgeons face intraoperatively. Materials methods A consecutive 106 total arthroplasty cases for primary glenohumeral osteoarthritis were studied. We classified glenoids by direct visualization noted lines in B2s. then calculated “angle erosion” as between back side unsupported, smooth-backed sizer disk neoglenoid. obtained depth throughout reaming process monitored subchondral bone. Results 43 (41%) B2. line paleoglenoid neoglenoid present, on average, from 1-o'clock 7-o'clock position a left shoulder. Mean 4.4 mm, occurring at 114° Cartesian coordinate system mean angle 18° (range, 8°-43°). Despite reaming, 20 (47%) had incompletely supported components final seating. Conclusions Arthritic are common, their maximal usually posteroinferior. Use standard reconstruct them may require significant bone removal achieve complete support. Alternatively, compromise, maintenance these requires implanting incomplete bony