Unilateral total hip replacement patients with symptomatic leg length inequality have abnormal hip biomechanics during walking

Article

Li, J., McWilliams, A., Jin, Z., Fisher, J., Stone, M., Redmond, A. and Stewart, T. 2015. Unilateral total hip replacement patients with symptomatic leg length inequality have abnormal hip biomechanics during walking. Clinical Biomechanics. 30 (5), pp. 513-519. https://doi.org/10.1016/j.clinbiomech.2015.02.014
TypeArticle
TitleUnilateral total hip replacement patients with symptomatic leg length inequality have abnormal hip biomechanics during walking
AuthorsLi, J., McWilliams, A., Jin, Z., Fisher, J., Stone, M., Redmond, A. and Stewart, T.
Abstract

BACKGROUND
Symptomatic leg length inequality accounts for 8.7% of total hip replacement related claims made against the UK National Health Service Litigation authority. It has not been established whether symptomatic leg length inequality patients following total hip replacement have abnormal hip kinetics during gait.
METHODS
Hip kinetics in 15 unilateral total hip replacement patients with symptomatic leg length inequality during gait was determined through multibody dynamics and compared to 15 native hip healthy controls and 15 'successful' asymptomatic unilateral total hip replacement patients.
FINDING
More significant differences from normal were found in symptomatic leg length inequality patients than in asymptomatic total hip replacement patients. The leg length inequality patients had altered functions defined by lower gait velocity, reduced stride length, reduced ground reaction force, decreased hip range of motion, reduced hip moment and less dynamic hip force with a 24% lower heel-strike peak, 66% higher mid-stance trough and 37% lower toe-off peak. Greater asymmetry in hip contact force was also observed in leg length inequality patients.
INTERPRETATION
These gait adaptions may affect the function of the implant and other healthy joints in symptomatic leg length inequality patients. This study provides important information for the musculoskeletal function and rehabilitation of symptomatic leg length inequality patients.

Research GroupBiophysics and Bioengineering group
PublisherElsevier
JournalClinical Biomechanics
ISSN0268-0033
Publication dates
Online28 Feb 2015
Print01 Jun 2015
Publication process dates
Deposited05 Jun 2017
Accepted20 Feb 2015
Output statusPublished
Publisher's version
License
Copyright Statement

© 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).

Digital Object Identifier (DOI)https://doi.org/10.1016/j.clinbiomech.2015.02.014
LanguageEnglish
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