Between 1976 and 2004, 38 revision arthroplasties (35 patients) were performed for aseptic loosening of the humeral component. The mean interval from primary arthroplasty to revision was 7.1 years (0.4 to 16.6). A total of 35 shoulders (32 patients) were available for review at a mean follow-up of seven years (2 to 19.3).

Pre-operatively, 34 patients (97%) had moderate or severe pain; at final follow-up, 29 (83%) had no or only mild pain (p < 0.0001). The mean active abduction improved from 88° to 107° (p < 0.01); and the mean external rotation from 37° to 46° (p = 0.27). Excellent or satisfactory results were achieved in 25 patients (71%) according to the modified Neer rating system. Humeral components were cemented in 29, with ingrowth implants used in nine cases. There were 19 of standard length and 17 were longer (two were custom replacements and are not included). Bone grafting was required for defects in 11 humeri. Only two glenoid components were left unrevised. Intra-operative complications included cement extrusion in eight cases, fracture of the shaft of the humerus is two and of the tuberosity in four. There were four re-operations, one for recurrent humeral loosening, with 89% survival free of re-operations at ten years.

Revision surgery for aseptic loosening of the humeral component provides reliable pain relief and modest improvement of movement, although there is a substantial risk of intra-operative complications. Revision to a total shoulder replacement gives better results than to a hemiarthroplasty.

Between January 1, 1976 and December 31, 1991, 195 total shoulder arthroplasties and 108 hemiarthroplasties were performed by the senior author in patients with rheumatoid arthritis. One hundred eighty-seven total shoulder arthroplasties and 95 hemiarthroplasties with complete preoperative evaluation, operative records, and minimum 2-year follow-up (mean 11.6 years) or follow-up until revision were included in the clinical analysis. Twenty patients died and one was lost to follow-up. All 303 shoulders were included in the survival analysis.

There was significant long term pain relief (P< .0001), improvement in active abduction (P< .0001), and external rotation (P< .0001) with both, hemiarthroplasty and total shoulder arthroplasty. There was not a significant difference in improvement in pain and motion comparing hemiarthroplasty and total shoulder arthroplasty for patients with a thin or torn rotator cuff. However, among patients with an intact rotator cuff, improvement in pain and abduction were significantly greater with total shoulder arthroplasty. Additionally, among patients with an intact rotator cuff, the risk for revision was significantly lower for total shoulder arthroplasty (p=0.04).

Radiographs were available for 152 total shoulder arthroplasties and 63 hemiarthroplasties with a minimum 2 year follow-up. Glenoid erosion was present in 62 of 63 hemiarthroplasties (98%). Glenoid periprosthetic lucency was present in 110 of 152 total shoulder arthroplasties (72%).

The data from this study indicate there is marked long term pain relief and improvement in motion with shoulder arthroplasty. Among patients with an intact rotator cuff, total shoulder arthroplasty appears to be the preferred procedure for pain relief, improvement in abduction, and lower risk of revision surgery.