Shoulder arthroplasty for chondrolysis.

BACKGROUND

Chondrolysis is a rare complication after shoulder arthroscopy leading to early joint destruction. Shoulder arthroplasty may be considered for end-stage chondrolysis, but concerns exist about implant survivorship, given the younger age of this population. This study aimed to assess pain relief, function, and survivorship of shoulder arthroplasty for chondrolysis and to assess risk factors for failure.

METHODS

Between January 2000 and January 2013, 26 consecutive shoulders with chondrolysis were treated at our institution with shoulder arthroplasty. All shoulders had a prior arthroscopic procedure that predated a phase of rapid joint destruction. Twenty-three shoulders were followed up for a minimum of 2 years or until reoperation (mean, 4.0 years; range, 0.7-8.6 years). The mean age of the patients was 40 years (range, 21-58 years). Outcome measures included pain, range of motion, postoperative modified Neer ratings, American Shoulder and Elbow Surgeons scores, complications, and reoperations.

RESULTS

At most recent follow-up, only 14 of 23 shoulders had no or mild pain. Overall pain scores improved from 4.7 to 2.6 points. Abduction and external rotation improved significantly. Five shoulders required reoperation, 2 for glenoid loosening and 1 each for infection, instability, and stiffness. Subjectively, 8 patients rated their shoulder as much better, 7 as better, 4 the same, and 4 worse. Most recent American Shoulder and Elbow Surgeons scores averaged 64 points (range, 20-95 points).

CONCLUSIONS

Shoulder arthroplasty for the treatment of chondrolysis improves pain and range of motion. However, patient satisfaction is variable. Early follow-up shows a higher than expected rate of reoperation (25%). Patients undergoing shoulder arthroplasty for chondrolysis should be counseled appropriately about expectations after surgery.