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J Arthroplasty. 2013 Oct;28(9 Suppl):172-5. doi: 10.1016/j.arth.2013.01.005. Epub 2013 Mar 20.

Medial mobile bearing unicompartmental knee arthroplasty: early survivorship and analysis of failures in 1000 consecutive cases.

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  • 1Joint Implant Surgeons, Inc., New Albany, Ohio; Mount Carmel Health System, New Albany, Ohio.

Abstract

Unicompartmental knee arthroplasty (UKA) is a less invasive treatment for medial gonarthrosis. However, registry data have demonstrated higher revision and early failure rates. The purpose of this study is to report the early survivorship and failure modes in a series of 1000 consecutive medial mobile bearing UKA. UKA patients with a minimum of 2 year follow-up or those meeting the study endpoint (UKA failure or death) were included. Demographic variables, pre and post-operative clinical variables, and mode of failure were analyzed. Eight hundred and thirty-nine knees were included in the analysis. Forty revisions were performed at an average of 23.1 months (range, 2.3-74.2) following UKA for a survivorship of 95.2%. Indications for revision were aseptic loosening (15), tibial collapse (7), mobile bearing dislocation (2), persistent pain (12), progression of disease (2), infection (1), and tibiofemoral instability (1). These results are from a single center and may not be comparable to those of larger reports such as national registries.

Copyright © 2013. Published by Elsevier Inc.

KEYWORDS:

medial unicompartmental knee arthroplasty; minimally invasive; mobile bearing; rapid recovery protocol; survivorship

PMID:
23523498
[PubMed - indexed for MEDLINE]
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