Computer-assisted kinematic and mechanical axis total knee arthroplasty: a prospective randomized controlled trial of bilateral simultaneous surgery

McEwen, Peter J., Dlaska, Constantine E., Jovanovic, Ivana A., Doma, Kenji, and Brandon, Benjamin J. (2020) Computer-assisted kinematic and mechanical axis total knee arthroplasty: a prospective randomized controlled trial of bilateral simultaneous surgery. Journal of Arthroplasty, 35 (2). pp. 443-450.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: https://doi.org/10.1016/j.arth.2019.08.0...
22


Abstract

Background: Randomized controlled trials of kinematic alignment (KA) and mechanical alignment (MA) in primary total knee arthroplasty (TKA) have to date demonstrated at least equivalence of KA in terms of clinical outcomes. No trial of bilateral TKA has been conducted so patient preference for one technique over the other is unknown.

Methods: Forty-one participants underwent computer-assisted bilateral TKA. The outcome measures were as follows: (1) joint range of motion and functional scores including the KOOS, the KOOS JR, Oxford Knee Score, and the Forgotten Joint Score at a minimum of 2 years; (2) preference and perception of limb symmetry; (3) intraoperative alignment data; (4) release and gap balance data; and (5) postoperative radiographic joint angles.

Results: There were no significant differences with respect to flexion range (P=.970) or functional scores (mean KOOS, P=.941; KOOS JR, P=.685; Oxford Knee Score, P=.578; FJS, P=.542). Significantly more participants who favored one knee preferred their KA TKA (P=.03); however, half of the patients had no preference and the overall numbers were small. Only 3 participants perceived any limb asymmetry (P<.001). More releases were required in the MA group (P=.018). Standing hip-knee-ankle angle means and frequency distributions were similar (P=.097 and P=.097, respectively).

Conclusion: Clinical outcomes were equivalent at 2 years. Significantly more participants preferred their KA joint. Fewer releases were required using a KA technique. Participants were visually insensitive to modest hip-knee-ankle angle asymmetry.

Item ID: 61609
Item Type: Article (Research - C1)
ISSN: 1532-8406
Keywords: computer assisted, total knee, arthroplasty, kinematic, mechanical
Copyright Information: © 2019 Elsevier Inc. All rights reserved.
Date Deposited: 29 Jan 2020 07:35
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320216 Orthopaedics @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320226 Surgery @ 50%
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page