Loosening, rotator cuff deficiency common with cemented total shoulder replacement

At the 10-year to 15-year review, radiographic loosening of the glenoid component and rotator cuff deficiency were common when the implants, cementation and surgical technique were used in patients with primary glenohumeral osteoarthritis, according to this study.

Researchers studied 39 arthroplasties, with special regard to glenoid component loosening, at a mean of 11 years postoperatively. They found the mean constant score was 27 points preoperatively vs. 61 points postoperatively. Mean shoulder flexion increased from 84° preoperatively to 133° postoperatively; mean abduction increased from 77° to 123°; and mean external rotation increased from 11° to 35°.

Thirty-six percent of the glenoid components and no humeral components were radiographically loose at follow-up. With revision as the endpoint, Kaplan-Meier survivorship of the glenoid component was 100% after 13 years. However, with radiographic loosening as the endpoint, survivorship was 48% after 13 years. Researchers also found no correlation between glenoid loosening on radiographs and clinical findings. Sixty-nine percent of cases had cranial migration of the humerus.

Disclosure: The researchers had no relevant financial disclosures.

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Source:

Raiss P. J Bone Joint Surg. 2012;doi:10.2106/JBJS.K.00580.