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Type: Journal article
Title: Reintervention after Mobile-bearing Oxford Unicompartmental Knee Arthroplasty
Author: Clark, M.
Campbell, D.
Kiss, G.
Dobson, P.
Lewis, P.
Citation: Clinical Orthopaedics and Related Research, 2010; 468(2):576-580
Publisher: Lippincott Williams & Wilkins
Issue Date: 2010
ISSN: 0009-921X
Statement of
Marcia Clark, David G. Campbell, Greg Kiss, Peter J. Dobson, Peter L. Lewis
Abstract: <h4>Background</h4>Medial compartment osteoarthritis is a common disorder that often is treated by unicompartmental knee arthroplasty (UKA). Although the Oxford 3 prosthesis is commonly used based on revision rate and cumulative survival, our experience suggests that although there may be adequate implant survival rates, we observed a worrisome and undisclosed reintervention rate of nonrevision procedures.<h4>Purpose</h4>We describe the frequency and cause of repeat intervention subsequent to implanting this device.<h4>Methods</h4>Between 1998 and 2005, 398 patients underwent UKA using the Oxford 3 prosthesis. The minimum followup was 12 months (mean, 43 months; range, 12-102 months).<h4>Results</h4>Forty of the 398 (10%) patients had 55 (13.8%) repeat anesthetics (reintervention). There were 38 nonrevision reinterventions. Revision was performed in 15 patients (3.8%), but two patients had a second revision (17 revisions or 4.3%). We revised the UKA to a second UKA in seven of the 15 cases but two subsequently were rerevised to a TKA; eight were revised directly to a TKA.<h4>Conclusions</h4>Although our data confirm the reported revision rates for this prosthesis, we observed a substantial reintervention rate. Most of the reinterventions are minor and are diagnosed frequently and treated arthroscopically. If revision is required, a second UKA may be considered and performed successfully in patients with isolated loosening of one component.<h4>Level of evidence</h4>Level II, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.
Keywords: Knee
Osteoarthritis, Knee
Prosthesis Failure
Treatment Outcome
Arthroplasty, Replacement, Knee
Retrospective Studies
Prosthesis Design
Knee Prosthesis
Time Factors
Aged, 80 and over
Middle Aged
Rights: © The Association of Bone and Joint Surgeons® 2009
DOI: 10.1007/s11999-009-1089-y
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Orthopaedics and Trauma publications

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