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Comparative Study
. 2016 Oct;98-B(10 Supple B):22-27.
doi: 10.1302/0301-620X.98B10.BJJ-2016-0483.R1.

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty: a comparison between consultant and trainee surgeons

N Bottomley  1 , L D Jones  1 , R Rout  1 , A Alvand  1 , I Rombach  1 , T Evans  1 , W F M Jackson  1 , D J Beard  1 , A J Price  1
Affiliations
Comparative Study

A survival analysis of 1084 knees of the Oxford unicompartmental knee arthroplasty: a comparison between consultant and trainee surgeons

N Bottomley et al. Bone Joint J. 2016 Oct.

Abstract

Aims: The aim of this to study was to compare the previously unreported long-term survival outcome of the Oxford medial unicompartmental knee arthroplasty (UKA) performed by trainee surgeons and consultants.

Patients and methods: We therefore identified a previously unreported cohort of 1084 knees in 947 patients who had a UKA inserted for anteromedial knee arthritis by consultants and surgeons in training, at a tertiary arthroplasty centre and performed survival analysis on the group with revision as the endpoint.

Results: The ten-year cumulative survival rate for revision or exchange of any part of the prosthetic components was 93.2% (95% confidence interval (CI) 86.1 to 100, number at risk 45). Consultant surgeons had a nine-year cumulative survival rate of 93.9% (95% CI 90.2 to 97.6, number at risk 16). Trainee surgeons had a cumulative nine-year survival rate of 93.0% (95% CI 90.3 to 95.7, number at risk 35). Although there was no differences in implant survival between consultants and trainees (p = 0.30), there was a difference in failure pattern whereby all re-operations performed for bearing dislocation (n = 7), occurred in the trainee group. This accounted for 0.6% of the entire cohort and 15% of the re-operations.

Conclusion: This is the largest single series of the Oxford UKA ever reported and demonstrates that good results can be achieved by a heterogeneous group of surgeons, including trainees, if performed within a high-volume centre with considerable experience with the procedure. Cite this article: Bone Joint J 2016;(10 Suppl B):22-7.

Keywords: Arthroplasty; Knee; Partial; Survival; Trainee.

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Figures

Fig. 1
Fig. 1
Graph showing cumulative survival of implants over ten years, comparing consultants and trainees.
See this image and copyright information in PMC

References

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