Does the degree of osteoarthritis influence the clinical outcome after anatomic total shoulder arthroplasty?
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ORTHOPAEDIC SURGERY
Does the degree of osteoarthritis influence the clinical outcome after anatomic total shoulder arthroplasty? Boris Sowa1 · Maike Petersen1 · Michael Maier1 · Matthias Bülhoff1 · Thomas Bruckner2 · Gilles Walch3 · Patric Raiss1,4 Received: 29 September 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Background The degree of preoperative osteoarthritis has been shown to influence the postoperative outcome and the patients’ satisfaction rate in hip and knee joint replacement surgery. However, no corresponding information is available for total shoulder arthroplasty (TSA). We therefore set out to evaluate the influence of preoperatively measured end-stage osteoarthritis on the postoperative clinical outcome of TSA. Methods A retrospective analysis of 103 anatomic total shoulder replacements (96 patients) was performed. Patients were evaluated radiologically with X-rays in two planes and clinically using the Constant and Murley score (CS) and the selfreported satisfaction with the result. The degree of osteoarthritis was radiographically analyzed with the aid of the classifications according to Kellgren/Lawrence, Gerber, Guyette, and Allain and according to whether complete narrowing of the glenohumeral joint was present or not [bone-on-bone contact (BOB) or no bone-on-bone contact (No BOB)]. Results The clinical results of TSA did not differ significantly among the various stages of osteoarthritis in any of the classifications (p > 0.05). The CS was significantly higher postoperatively for both the BOB and the No BOB group (p 7 mm in height Sclerosis and narrowing of glenohumeral joint
Table 2 Classification according to Gerber Stage 1 2 3
Inferior humeral head or glenoid osteophyte
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