Functional outcomes and general health status after ulnohumeral arthroplasty for primary degenerative arthritis of the elbow.

Ulnohumeral arthroplasty (UHA) is considered a satisfactory surgical treatment option for patients with primary degenerative arthritis of the elbow. Most series have used categoric elbow scoring systems to evaluate the outcome of this procedure. The purpose of our study was to evaluate the outcome of UHA with patient-derived functional and general health status outcome instruments. We evaluated 17 patients (18 elbows) with primary degenerative arthritis of the elbow at a mean of 85 months after UHA. The mean age at the time of surgery was 42 years (range, 26 to 58 years). At the follow-up evaluation, the patients were assessed with a physical examination, outcome assessment tools, and plain radiographs. The mean elbow flexion arc improved by 16 degrees (range, -15 degrees to 60 degrees ; P = .012), and the mean forearm rotation arc (supination/pronation) improved by 35 degrees (range, -20 degrees to 90 degrees ; P < .001). Of the elbows, 11 were painless, 4 were painful with motion, and 3 were painful at rest and with motion. The mean Hospital for Special Surgery elbow score was 70 (range, 40 to 99), and the mean Mayo Elbow Performance Score was 83 (range, 50 to 100). The mean Disabilities of the Arm, Shoulder and Hand score was 9.75 (range, 0 to 43.48). The Short Form-36 scores were better than the mean age- and sex-adjusted normal values. Patient self-assessed outcomes and general health status after UHA for primary degenerative elbow arthritis appear to be better than those determined by some categoric scoring systems. Consequently, the clinical utility of UHA may be underrepresented if physician-derived categoric scoring systems are the only measures of outcome assessment.