Seven-year survival analysis of the Global® CAP® (Conservative Anatomic Prosthesis) shoulder resurfacing

Abstract

Background

Shoulder resurfacings represent approximately one-third of shoulder arthroplasties and have the highest revision rates of any shoulder arthroplasty. We present a survival analysis of the Global CAP hemi-resurfacing implanted by multiple surgeons with up to 10 years of follow-up.

Methods

A life-table survival analysis of the Global CAP hemi-resurfacing was undertaken in a single site with multiple surgeons. Two survival analyses were performed; first, where failure was defined as component exchange and, second, where failure was defined as re-operation for any reason. Postoperative functional outcome was quantified using the Quick Disability Arm Hand and Shoulder Score (Quick DASH) and Oxford Shoulder Score (OSS).

Results

Eighty-seven Global CAPs were implanted in 75 patients. At a mean (SD) follow-up of 5.4 years (2.5 years) (range 0.9 years to 10 years), five patients had revision surgery and three patients underwent a reoperation for any reason. Survival at year 7 with component exchange as the endpoint was 80% (95% confidence interval = 93 to 65) and survival with re-operation for any reason as the end point was 62% (95% confidence interval = 82 to 50). The mean OSS and Quick DASH were 35 and 27.6, respectively.

Conclusions

The Global CAP has similar survivorship in the short to medium term and produces similar clinical outcomes compared to other shoulder resurfacings.

Keywords

arthroplasty Global CAP resurfacing shoulder survival

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References

Levy

Copeland

. Cementless surface replacement arthroplasty of the shoulder. 5- to 10-year results with the Copeland mark-2 prosthesis. J Bone Joint Surg Br 2001; 83: 213–221.

Levy

Copeland

. Cementless surface replacement arthroplasty (Copeland CSRA) for osteoarthritis of the shoulder. J Shoulder Elbow Surg 2004; 13: 266–271.

NJR Editorial Board. National Joint Registry 13th Annual report. Hemel Hempstead: Northgate Public Services, 2015:147–170.

Geervliet

van den Bekerom

Spruyt

Curvers

Visser

van Noort

. Short-term results of the global CAP uncemented resurfacing shoulder prosthesis. Orthopedics 2014; 37: 42–47.

Armitage P, Berry G, Matthews JNS. Survival analysis. In: Armitage P. (ed.) Statistical methods in medical research. Oxford: Blackwell Science Ltd., 2008:568–590.

Graves

Davidson

Ingerson

et al.

The Australian Orthopaedic Association National Joint Replacement Registry. Med J Australia 2004; 180: S31–S34.

Rasmussen

Olsen

Fevang

et al.

A review of national shoulder and elbow joint replacement registries. J Shoulder Elbow Surg 2012; 21: 1328–1335.

Australian Orthopaedic Association National Joint Replacement Registry. Annual report. Adelaide: AOA, 2016:350–353.

The New Zeland Joint Registry. The New Zealand Joint Registry Seventeen Year Report (January 1999 – December 2015). Christchurch: New Zealand Orthopaedic Association, 2017:126–140.

10.

The Norwegian Arthroplasty Register and Centre of Excellence of Joint Replacements. The Norwegian Arthroplasty Register report in English. Haukeland: Department of Orthopaedic Surgery, Haukeland University Hospital, 2015.

11.

Rai

Wand

Bigsby

. Long-term follow-up of the Copeland Resurfacing hemi-arthroplasty in a district general hospital. Bone Joint J Orthop Proc Suppl 2014; 96B: 17–17.

12.

Younis

Sultan

Dix

Hughes

. The range of the Oxford Shoulder Score in the asymptomatic population: a marker for post-operative improvement. Ann R Coll Surg Engl 2011; 93: 629–633.