A prospective study was done of 50 total shoulder replacements in 44 patients who were followed for an average of 3.5 years (range, 2.0 to 7.5 years). The preoperative diagnosis was osteoarthritis in 33 shoulders, rheumatoid arthritis in 11, and a previous fracture of the humeral head in 6 shoulders. 9 of the shoulders had a tear of the rotator cuff. The Neer-II system of total shoulder replacement with a non-metal-backed component was used in all 50 shoulders. At follow-up, 44 shoulders (88 per cent) had no significant pain. Of the 6 painful shoulders, 4 had loosening of the glenoid component and one had malposition of both components. 3 of the 6 shoulders had no significant pain after revision. The average range of active forward elevation in all of the shoulders improved from 71 to 100 degrees, and both external and internal rotation improved as well. 5 specific activities of daily living were evaluated, and the patients' ability to perform them improved from 14 to 78 per cent. 35 shoulders (68 per cent) were rated by the patients as much better; 13 shoulders (26 per cent), as better; and 3 (6 per cent), as no better. An incomplete lucent line was noted around 5 (10 per cent) of the cemented humeral stems and around 37 (74 per cent) of the glenoid prostheses. 4 arthroplasties (8 per cent) required revision: 3 for loosening of the glenoid component and one for malposition of both components.(ABSTRACT TRUNCATED AT 250 WORDS)
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A prospective study was done of 50 total shoulder replacements in 44 patients who were followed for an average of 3.5 years (range, 2.0 to 7.5 years). The preoperative diagnosis was osteoarthritis in 33 shoulders, rheumatoid arthritis in 11, and a previous fracture of the humeral head in 6 shoulders. 9 of the shoulders had a tear of the rotator cuff. The Neer-II system of total shoulder replacement with a non-metal-backed component was used in all 50 shoulders. At follow-up, 44 shoulders (88 per cent) had no significant pain. Of the 6 painful shoulders, 4 had loosening of the glenoid component and one had malposition of both components. 3 of the 6 shoulders had no significant pain after revision. The average range of active forward elevation in all of the shoulders improved from 71 to 100 degrees, and both external and internal rotation improved as well. 5 specific activities of daily living were evaluated, and the patients' ability to perform them improved from 14 to 78 per cent. 35 shoulders (68 per cent) were rated by the patients as much better; 13 shoulders (26 per cent), as better; and 3 (6 per cent), as no better. An incomplete lucent line was noted around 5 (10 per cent) of the cemented humeral stems and around 37 (74 per cent) of the glenoid prostheses. 4 arthroplasties (8 per cent) required revision: 3 for loosening of the glenoid component and one for malposition of both components.(ABSTRACT TRUNCATED AT 250 WORDS)
Copyright remains with the authors and publisher.