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Fixed bearing lateral unicompartmental knee arthroplasty-Short to midterm survivorship and knee scores for 101 prostheses

Smith, James R.A.; Robinson, James R.; Porteous, Andrew J.; Murray, James R.D.; Hassaballa, Mohammad A.; Artz, Neil; Newman, John H.

Authors

James R.A. Smith

James R. Robinson

Andrew J. Porteous

James R.D. Murray

Mohammad A. Hassaballa

Neil Artz

John H. Newman



Abstract

Background: Isolated unicompartmental knee arthritis is less common laterally than medially. Lateral unicompartmental knee arthroplasty (UKA) constitutes only 1% of all knee arthroplasty performed. Use of medial UKA is supported by several published series showing good long-term survivorship and patient satisfaction, in large patient cohorts. Results of lateral UKA however have been mixed. We present the short and mid-term survivorship and 5-year clinical outcome of 101 lateral UKAs using a single prosthesis. Methods: Over a 9. year period, 100 patients who satisfied inclusion criteria underwent a lateral fixed-bearing unicompartmental arthroplasty. American Knee Society (AKSS), Oxford Knee (OKS) and modified Western Ontario McMaster Universities Arthritis Index (WOMAC) scores were completed preoperatively and at 1, 2 and 5. years postoperatively. Kaplan-Meier survival analysis was used to determine the 2-year and 5-year survivorship, using revision for any cause as end point. Results: Survivorship was 98.7% and 95.5% at 2 and 5. years respectively. 1 knee was revised for subsidence of the tibial component and 1 knee for progression of medial compartment osteoarthritis. Of a possible 35 knees in situ at 5. year follow-up, 33 knees were fully scored. Median AKSS, OKS and modified WOMAC scores were 182, 41, and 16 respectively. Conclusions: The mid-term survivorship and outcome scores at 5-years suggest that lateral unicompartmental knee arthroplasty provides a valuable alternative to total joint replacement in selected patients with isolated lateral tibio-femoral arthritis at mid-term follow-up.Level II evidence. © 2014 Elsevier B.V.

Citation

Smith, J. R., Robinson, J. R., Porteous, A. J., Murray, J. R., Hassaballa, M. A., Artz, N., & Newman, J. H. (2014). Fixed bearing lateral unicompartmental knee arthroplasty-Short to midterm survivorship and knee scores for 101 prostheses. Knee, 21(4), 843-847. https://doi.org/10.1016/j.knee.2014.04.003

Journal Article Type Article
Acceptance Date Apr 1, 2014
Online Publication Date Apr 12, 2014
Publication Date Jan 1, 2014
Deposit Date Jul 2, 2019
Publicly Available Date Mar 29, 2024
Journal Knee
Print ISSN 0968-0160
Electronic ISSN 1873-5800
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 21
Issue 4
Pages 843-847
DOI https://doi.org/10.1016/j.knee.2014.04.003
Public URL https://uwe-repository.worktribe.com/output/1467314
Publisher URL https://doi.org/10.1016/j.knee.2014.04.003

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