Augmented glenoid implants in shoulder arthroplasty are used for glenohumeral osteoarthritis with Walch type B2 and B3 glenoid morphology, which are characterized by humeral head posterior subluxation 1-3.
Shoulder replacement with augmentation of the glenoid implant allows for:
correct glenoid retroversion without loss of bone stock, caused by excessing reaming
decreases medialization of the joint line
preserved biomechanical length-tension relationships resulting in optimal muscle function and joint stability
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Indications
reverse shoulder arthroplasty (RSA) with a superior augmented baseplate (SAB) or a posterior augmented baseplate (PAB) without eccentric reaming or bone graft
total shoulder arthroplasty (TSA) with glenoid augmentation
Radiographic features
Pre-operative
Planning CT study with computer-assisted surgical techniques such as 3-dimensional planning software, to assess glenoid version, configuration, available bone stock for placing a prosthesis and patient-specific guides.
Post-operative
Immediate postoperative radiograph to exclude complications such as glenohumeral dislocation or periprosthetic fracture.
Follow-up imaging as a baseline study to which all future studies are compared to, is performed at 3–6 weeks after surgery and include true anteroposterior (AP) or Grashey view, axillary and scapular Y views.
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