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Measuring medial longitudinal arch deformation during gait. A reliability study.

Jesper Bencke¹, Ditte Christiansen, Kathrine Jensen

¹Gait Analysis Laboratory, Department of Orthopaedic Surgery, Copenhagen University Hospital, Hvidovre, Denmark. jesper.bencke@hvh.regionh.dk

|November 26, 2011

Summary

A new 3D method reliably measures medial longitudinal arch deformation during gait. Static navicular drop measurements do not accurately predict dynamic arch changes during walking.

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Area of Science:

Biomechanics
Orthopedics
Gait Analysis

Background:

Clinical assessment of medial longitudinal arch deformation (MLAD) during walking gait often relies on static measures like navicular drop (ND).
The accuracy of static measures in representing dynamic foot function during gait is not well established.

Purpose of the Study:

To evaluate the test-retest reliability of a novel three-dimensional (3D) method for measuring MLAD during gait.
To compare the 3D method with a static ND measure and a 2D dynamic method for MLAD assessment.

Main Methods:

Fifty-two feet from 26 healthy male participants were assessed twice within 4-9 days.
Measurements included a 3D three-marker foot model, a 2D video-based model for dynamic MLAD, and static ND during quiet standing.

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Test-retest reliability and correlation between methods were analyzed.

Main Results:

The 3D method demonstrated the highest test-retest reliability for measuring MLAD during gait.
Static navicular drop (ND) showed only moderate correlation with both dynamic 2D and 3D MLAD measurements.
ND measured during quiet standing could not reliably predict MLAD during walking gait.

Conclusions:

The novel 3D method is a highly reliable tool for assessing MLAD during gait.
Static ND measurements are insufficient for predicting dynamic changes in the medial longitudinal arch during walking.
The 3D or 2D dynamic methods are recommended for reliable clinical estimation of foot longitudinal stability during gait.