Medial Mobile Bearing Unicompartmental Knee Arthroplasty: Early Survivorship and Analysis of Failures in 1000 Consecutive Cases

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 mobi...

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Bibliographic Details
Published in:The Journal of arthroplasty 2013-10, Vol.28 (9), p.172-175
Main Authors: Bergeson, Adam G., Berend, Keith R., Lombardi, Adolph V., Hurst, Jason M., Morris, Michael J., Sneller, Michael A.
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Arthroplasty, Replacement, Knee
Female
Humans
Joint Diseases - surgery
Knee Prosthesis
Male
medial unicompartmental knee arthroplasty
Middle Aged
minimally invasive
mobile bearing
Osteoarthritis, Knee - surgery
Prosthesis Failure
rapid recovery protocol
Reoperation
survivorship
Treatment Outcome
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Description
Summary: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 2year 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 23.1months (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.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2013.01.005