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Hip joint load in relation to leg length discrepancy
Örebro University, School of Medical Sciences. Department of Molecular Medicine and Surgery, Section of Orthopaedics), Karolinska Institute, Stockholm, Sweden.
Department of Molecular Medicine and Surgery, Section of Orthopaedics), Karolinska Institute, Stockholm, Sweden.
Department of Women and Child Health, Karolinska Institute, Stockholm, Sweden.
2008 (English)In: Medical Devices: Evidence and Research, ISSN 1179-1470, E-ISSN 1179-1470, Vol. 1, 13-18 p.Article in journal (Refereed) Published
Abstract [en]

Objective: Leg length discrepancy is common both in healthy subjects and after total hip arthroplasty (THA). Studies that evaluated leg length following THA have demonstrated a notable inconsistency in restoring leg length. The effects concerning joint load during gait is however not well known. The purpose of this study was to use three-dimensional (3D) gait analysis to evaluate joint load during gait with a simulated leg length discrepancy of 2 and 4 cm. Nine healthy subjects without any history of hip injury participated.

Method: A 3D gait analysis (Vicon, Motion System, Oxford, England) was performed with 6 cameras and 2 force palates using a standard biomechanical gait model. Hip joint moments of force were calculated for all three degrees of motion freedom. ANOVA for repeated measurements was used for statistical calculations.

Results: Abduction peak moment was significantly increased at the short side (P < 0.05) but unaffected on the long side. The adduction moment decreased on the long side between 0 and 4 cm (P < 0.01) but was unaffected on the short side. The internal hip rotation moments were unchanged for both the long and the short side. The external rotation moment was unchanged on the short side and decreased between bare foot and 4 cm on the long side (P < 0.05).

Conclusion: A leg length discrepancy of 2 cm or more creates biomechanical changes concerning hip joint load both on the long and the short side and that the effects are larger on the short side. The increased stress may cause problems in the long run.

Place, publisher, year, edition, pages
Macclesfield, United Kingdom: Dove Medical Press Ltd.(Dovepress) , 2008. Vol. 1, 13-18 p.
Keyword [en]
Gait analyses, leg length discrepancy, hip, biomechanics
National Category
Medical and Health Sciences Orthopedics
Identifiers
URN: urn:nbn:se:oru:diva-55779PubMedID: 22915902Scopus ID: 2-s2.0-77953386110OAI: oai:DiVA.org:oru-55779DiVA: diva2:1074566
Available from: 2017-02-15 Created: 2017-02-15 Last updated: 2017-03-01Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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