The Impact of Wear and Lift-Off on Coronal Plane Alignment in TKA and Implications to Future Constrained Revision: A Retrieval Study

Authors

Pieter Jan T.K. Vandekerckhove, London Health Sciences Centre
Matthew G. Teeter, London Health Sciences Centre
Douglas D.R. Naudie, London Health Sciences Centre
James L. Howard, London Health Sciences Centre
Steven J. MacDonald, London Health Sciences Centre
Brent A. Lanting, London Health Sciences Centre

Document Type

Article

Publication Date

11-1-2015

Journal

Journal of Arthroplasty

Volume

30

Issue

11

First Page

2017

Last Page

2020

URL with Digital Object Identifier

10.1016/j.arth.2015.05.048

Abstract

© 2015 Elsevier Inc.. Current discussion exists whether to position a total knee arthroplasty (TKA) in slight undercorrection in varus osteoarthritis. The goal of this study was to analyse the effect of wear and lateral lift-off in primary TKA on coronal plane alignment and the implication to future constrained revision TKA. Seventy-six retrieved tibial inserts were analysed for the ratio of wear (RW), lateral lift-off and implications for future constrained revision surgery according to the coronal plane alignment. The RW significantly affects the coronal plane alignment in TKA. Progressive wear and lateral lift-off were seen with progressive varus alignment. However, there was no difference in constrained revision between mild varus and moderate varus aligned TKAs.