Shoulder Arthroplasty Anatomy
A 62-year-old female with primary glenohumeral osteoarthritis is undergoing preoperative CT planning for total shoulder arthroplasty. The CT shows glenoid retroversion of 18° and a B2 glenoid morphology with posterior humeral head subluxation. The humeral head shows 25° of retroversion relative to the transepicondylar axis. Regarding normal shoulder anatomy relevant to arthroplasty:
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Normal glenoid version is approximately 2° of retroversion (range 0-7° retroversion); glenoid retrov...
Normal humeral head retroversion averages 20-30° relative to the transepicondylar axis (range 10-40°...
Normal glenoid version is 15-20° of anteversion; humeral retroversion should always be set at 0° reg...
The Walch classification describes glenoid morphology in osteoarthritis: Type A (centered wear, conc...
Humeral head offset refers to the medial-lateral position of the head center relative to the humeral...
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Click T (True) or F (False) for each option