Document Detail

Joint stiffness of the ankle during walking after successful mobile-bearing total ankle replacement.
MedLine Citation:
PMID:  17462899     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: It has been shown that walking kinematics remain near to normal after mobile bearing total ankle replacement (TAR). However, no information is available on mechanical joint loading. The purpose of this study was to determine whether mechanical load and 'quasi-stiffness' of the ankle joint after TAR differs from the normal load and stiffness of a healthy ankle joint during walking. METHODS: Ten TAR patients and 10 age-matched healthy control subjects (CO) participated in this study. Participants walked barefooted on an indoor track at self-selected walking speed. 3D ankle kinematics and ground reaction force were measured and used for the calculation of 3D net joint moments, joint quasi-stiffness coefficients and internal net joint ankle work. RESULTS: Between patients and control subjects no differences were observed in peak moments and stiffness coefficient at the ankle. Internal work at the ankle during the step differed however, significantly (-0.078 (0.088) J kg(-1) versus 0.005 (0.048) J kg(-1) for TAR versus CO, p=0.02), although it could be argued that this difference was due to a minor difference in walking speed between both groups (1.02 (0.07) versus 1.09 (0.07) for TAR versus CO, p=0.02). CONCLUSION: Despite the small difference in internal work at the ankle, there was no significant difference in mechanical loading of the ankle after TAR compared to normal.
Han Houdijk; H Cornelis Doets; Marienke van Middelkoop; H E J Dirkjan Veeger
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-04-25
Journal Detail:
Title:  Gait & posture     Volume:  27     ISSN:  0966-6362     ISO Abbreviation:  Gait Posture     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2007-12-18     Completed Date:  2008-04-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  115-9     Citation Subset:  IM    
Institute for Fundamental and Clinical Movement Sciences, and MOVE Interdepartmental Research Initiative, Vrije Universiteit, Amsterdam, The Netherlands.
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MeSH Terms
Ankle Joint / physiology,  surgery*
Arthritis / surgery
Arthritis, Rheumatoid / surgery
Arthroplasty, Replacement*
Case-Control Studies
Gait / physiology
Imaging, Three-Dimensional
Joint Prosthesis
Middle Aged
Range of Motion, Articular / physiology
Walking / physiology*
Weight-Bearing / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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