alexa Extramedullary guides versus portable, accelerometer-based navigation for tibial alignment in total knee arthroplasty: a randomized, controlled trial: winner of the 2013 HAP PAUL award.
Orthopaedics

Orthopaedics

Orthopedic & Muscular System: Current Research

Author(s): Nam D, Cody EA, Nguyen JT, Figgie MP, Mayman DJ

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Abstract Extramedullary (EM) tibial alignment guides have demonstrated a limited degree of accuracy in total knee arthroplasty (TKA). The purpose of this study was to compare the tibial component alignment obtained using a portable, accelerometer-based navigation device versus EM alignment guides. One hundred patients were enrolled in this prospective, randomized controlled study to receive a TKA using either the navigation device, or an EM guide. Standing AP hip-to-ankle and lateral knee-to-ankle radiographs were obtained at the first, postoperative visit. 95.7\% of tibial components in the navigation cohort were within 2° of perpendicular to the tibial mechanical axis, versus 68.1\% in the EM cohort (P<0.001). 95.0\% of tibial components in the navigation cohort were within 2° of a 3° posterior slope, versus 72.1\% in the EM cohort (P=0.007). A portable, accelerometer-based navigation device decreases outliers in tibial component alignment compared to conventional, EM alignment guides in TKA. © 2013 Elsevier Inc. All rights reserved. This article was published in J Arthroplasty and referenced in Orthopedic & Muscular System: Current Research

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