Glenoiditis or glenoid wear is the progressive erosion/wear of the native glenoid and is the most common complication of shoulder hemiarthroplasty. It may be caused by oversized humeral heads and insufficient joint release.
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Epidemiology
Glenoiditis after shoulder hemiarthroplasty occurs in one-third of patients at an average follow-up of 2.5 years 1. Young women, patients with early osteoarthritis and rheumatoid arthritis, or with a valgus positioned humeral component are most frequently affected 1.
Clinical presentation
Pain and progressive limitation of motion 1.
Radiographic features
Glenoditis may be caused by oversized humeral heads and insufficient joint release. Cartilage wear is more rapid in younger patients from increased joint stress.
Plain radiograph
progressive narrowing of the glenohumeral space 2
sclerosis with posterior glenoid wear and erosion 2
Treatment and prognosis
Revision will depend on the status of the rotator cuff 1:
with intact rotator cuff: total shoulder arthroplasty
with a rotator cuff tear: reverse total shoulder arthroplasty
The use of a new material for the humeral heads, such as pyrocarbon, which has an elastic modulus similar to cortical bone, seems to promise good results 1.
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