The Journal of Medical Investigation
Online ISSN : 1349-6867
Print ISSN : 1343-1420
ISSN-L : 1343-1420
Can intraoperative kinematic analysis predict postoperative kinematics following total knee arthroplasty? A preliminary
Keizo WadaHiroshi MikamiDaisuke HamadaTakaharu YamazakiTetsuya TomitaKoichi Sairyo
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2017 Volume 65 Issue 1.2 Pages 21-26

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Abstract

The preliminary study analyzed the relationship between intraoperative navigation‐based kinematics and postoperative 2‐dimensional/3‐dimensional (2D/3D) image registration‐based kinematics in total knee arthroplasty (TKA). Six knees in 5 patients were analyzed. All TKA procedures were performed using an image‐free knee navigation system. Tibial internal rotation was assessed by intraoperative knee kinematics. At 1 year after surgery, tibial internal rotation was evaluated using a 2D/3D image registration technique under loaded and unloaded conditions. The correlation between intraoperative and postoperative data for the tibial internal rotation angle at 10 increments of knee flexion was then assessed. Difference in the knee flexion angle between the intraoperative and postoperative evaluations was adjusted to account for the sagittal cutting angle of the distal femur and proximal tibia. A correlation was found between the intraoperative and postoperative data for loaded knee flexion with this adjustment (Pearson's r = 0.725, p = 0.012). However, intraoperative kinematics was not significantly correlated with postoperative kinematics in the absence of loading. Larger adequately powered prospective studies are now needed to confirm our preliminary finding that postoperative loaded kinematics can be predicted by intraoperative evaluation. J. Med. Invest. 65:21‐26, February, 2018

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© 2017 by The University of Tokushima Faculty of Medicine
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