title: The Impact of Wear and Lift-Off on Coronal Plane Alignment in TKA and Implications to Future Constrained Revision: A Retrieval Study.
abstract: 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.
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada; Department of Orthopaedic Surgery and Traumatology, Sint-Jan Hospital, Bruges, Belgium.
authors.forename: Pieter-Jan T K
authors.initials: PJ
authors.lastname: Vandekerckhove
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada.
authors.forename: Matthew G
authors.initials: MG
authors.lastname: Teeter
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada.
authors.forename: Douglas D R
authors.initials: DD
authors.lastname: Naudie
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada.
authors.forename: James L
authors.initials: JL
authors.lastname: Howard
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: MacDonald
authors.affiliation: Department of Orthopaedic Surgery, London Health Sciences Centre Ontario, Canada.
authors.forename: Brent A
authors.initials: BA
authors.lastname: Lanting
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods / Q000706:statistics & numerical data*; D060750:Bone Anteversion / Q000150:complications / Q000601:surgery*; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000150:complications / Q000601:surgery*; D012086:Reoperation
keywords: constrained; coronal plane alignment; lift-off; retrieval study; total knee arthroplasty; wear