Wn. Levine et al., HEMIARTHROPLASTY FOR GLENOHUMERAL OSTEOARTHRITIS - RESULTS CORRELATEDTO DEGREE OF GLENOID WEAR, Journal of shoulder and elbow surgery, 6(5), 1997, pp. 449-454
Thirty patients (31 shoulders) were retrospectively reviewed after hem
iarthroplasty for glenohumeral osteoarthritis. Ten shoulders had prima
ry osteoarthritis, and 21 shoulders had secondary osteoarthritis. Glen
oid surface wear was evaluated and classified as either type I, concen
tric, (15 shoulders) or type II, nonconcentric, (16 shoulders). Postop
erative results were reviewed with the American Shoulder and Elbow Sur
geons' evaluation Form, Neer classification, and the Constant score. O
verall, 23 (74%) shoulders achieved satisfactory results, and 8 (26%)
shoulders had unsatisfactory results. Results were similar in the prim
ary and secondary osteoarthritis groups. Outcome correlated most signi
ficantly with the status of posterior glenoid wear. Patients with conc
entric, type I glenoids achieved 86% satisfactory results, whereas pat
ients with nonconcentric, type II glenoids had only 63% satisfactory r
esults. Although pain relief was similar in both groups, the unsatisfa
ctory results were attributed to loss of Forward elevation and externa
l rotation in patients with type II glenoids. On the basis of these re
sults hemiarthroplasty can be an effective treatment for both primary
and secondary arthritis but should be reserved for patients with a con
centric glenoid, which affords a better fulcrum For glenohumeral motio
n.