Outcome and revision rate of uncemented glenohumeral resurfacing (C.A.P.) after 5–8 years
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Resurfacing of the glenohumeral joint for patients with glenohumeral arthritis has gained popularity since the first introduction. We report the mid-term results of the Global C.A.P. uncemented resurfacing shoulder prosthesis (DePuy Synthes).
From January 2007 to December 2009, 48 humeral cementless resurfacing prostheses in 46 patients were performed. All patients were diagnosed with primary glenohumeral osteoarthritis. Patients were contacted for review; the Constant Score, visual analog pain scale, Dutch Simple Shoulder Test, SF-12 scores and physical examination were assessed both preoperatively and yearly postoperatively. Complications and revision surgery were documented. Radiographs were evaluated for component size, offset, inclination, height, loosening and subluxation.
Forty-six patients (12 males) with a mean age of 72 years old (range 59–89) were included. At a mean 6.4-year follow-up (range 5–8), the Constant Score, visual analog pain scale and the Dutch Simple Shoulder Test scores improved significantly (p < 0.05) from baseline. Three patients were lost to follow-up. One patient died and two patients were not able to attend the follow-up appointments, due to other health-related issues. Eleven patients (23%) had a revision operation.
The most important findings of this study of the Global C.A.P. shoulder resurfacing arthroplasty were an increase of range of motion, a reduction of pain complaints, but a concerning high rate of revision after mid-term follow-up.
Level of evidence
Therapeutic Level IV.
KeywordsShoulder Osteoarthritis Cementless Resurfacing Arthroplasty Humerus Glenoid
Compliance with ethical standards
Conflict of interest
The original CAP study was funded by a grant (Spaarne Gasthuis #116347 and Alrijne Hospital #221090) from DePuy/Synthes, Warsaw, IN, USA, which participated in the study design and data management. The implant used in this study was not provided free of charge. The study sponsors had no role in the in the collection, analysis, interpretation of data, in the writing of the manuscript, and in the decision to submit the manuscript for publication.
Pieter Geervliet: The author, their immediate family, and any research foundation with which they are affiliated have not received any financial payments or other benefits from any commercial entity related to the subject of this article. Michel van den Bekerom: The author, their immediate family, and any research foundation with which they are affiliated have not received any financial payments or other benefits from any commercial entity related to the subject of this article. Paul Spruyt: The author, their immediate family, and any research foundation with which they are affiliated have not received any financial payments or other benefits from any commercial entity related to the subject of this article. Maud Curvers: The author, their immediate family, and any research foundation with which they are affiliated have not received any financial payments or other benefits from any commercial entity related to the subject of this article. Arthur van Noort: Dr Van Noort is a key opinion leader for Johnson and Johnson. Cornelis Visser: Dr Visser is a key opinion leader for Johnson and Johnson.
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