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Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Four-Dimensional CT Analysis Using Sequential 3D-3D Registration

Published on: November 23, 2019

A three dimensional approach for quantifying resultant loading at the knee.

Ryan T Lewinson¹, Chad P Maag², Victor M Y Lun³

¹Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada; Schulich School of Engineering, University of Calgary, Calgary, Alberta, Canada; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.

|November 16, 2016

Summary

This summary is machine-generated.

Lateral wedges reduce frontal-plane knee moments but may increase overall knee load in some knee osteoarthritis patients. Further research is needed to understand these varied responses.

Keywords:

Gait Joint loading Knee adduction moment Lateral wedge Osteoarthritis

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Area of Science:

Biomechanics
Orthopedics
Gait Analysis

Background:

Clinical effectiveness of lateral wedges for knee osteoarthritis is inconsistent.
Peak frontal-plane knee moment may not fully capture knee loading dynamics.

Purpose of the Study:

Propose a 3D resultant approach for knee moments.
Evaluate changes in 3D knee moments with lateral wedges.

Main Methods:

Gait analysis in 20 knee osteoarthritis patients with/without 6mm lateral wedges.
Calculated frontal-plane and 3D resultant knee moments.
Statistical analysis of moment changes and pain correlations.

Main Results:

Lateral wedges significantly reduced both peak frontal-plane and 3D resultant knee moments.
A significant correlation existed between changes in frontal-plane and 3D resultant moments.
Five participants showed reduced frontal-plane moments but increased 3D resultant moments.

Conclusions:

Lateral wedges alter frontal-plane moments, but 3D resultant moment changes may differ.
Resultant knee load can sometimes increase with lateral wedge use.
Investigate 3D resultant moments to explain varied clinical benefits of lateral wedges.