Knee moment outcomes using inverse dynamics and the cross product function in moderate knee osteoarthritis gait: A comparison study

Derek James Rutherford, Matthew Baker

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

12 Citas (Scopus)

Resumen

Inverse dynamics are the cornerstone of biomechanical assessments to calculate knee moments during walking. In knee osteoarthritis, these outcomes have been used to understand knee pathomechanics, but the complexity of an inverse dynamic model may limit the uptake of joint moments in some clinical and research structures. The objective was to determine whether discrete features of the sagittal and frontal plane knee moments calculated using inverse dynamics compare to knee moments calculated using a cross product function. Knee moments from 74 people with moderate knee osteoarthritis were assessed after ambulating at a self-selected speed on an instrumented dual belt treadmill. Standardized procedures were used for surface marker placement, gait speed determination and data processing. Net external frontal and sagittal plane knee moments were calculated using inverse dynamics and the three-dimensional position of the knee joint center with respect to the center of pressure was crossed with the three-dimensional ground reaction forces in the cross product function. Correlations were high between outcomes of the moment calculations (r > 0.9) and for peak knee adduction moment, knee adduction moment impulse and difference between peak flexion and extension moments, the cross product function resulted in absolute values less than 10% of those calculated using inverse dynamics in this treadmill walking environment. This computational solution may allow the integration of knee moment calculations to understand knee osteoarthritis gait without data collection or computational complexity.

Idioma originalEnglish
Páginas (desde-hasta)150-154
Número de páginas5
PublicaciónJournal of Biomechanics
Volumen78
DOI
EstadoPublished - sep. 10 2018

Nota bibliográfica

Funding Information:
The authors would like to thanks Dr. William Stanish, Dr. Nathan Urquhart and Dr. Ivan Wong for assistance with recruitment, Ms. Michelle Jones and Ms. Sara Saleh for assistance with data collection and processing and for the participants for volunteering their time to support our work. Funding was provided by the Nova Scotia Health Research Foundation Establishment (MED-EST-2014-9605) and Develop and Innovation (MED-DI-2014-9558) grants.

Funding Information:
The authors would like to thanks Dr. William Stanish, Dr. Nathan Urquhart and Dr. Ivan Wong for assistance with recruitment, Ms. Michelle Jones and Ms. Sara Saleh for assistance with data collection and processing and for the participants for volunteering their time to support our work. Funding was provided by the Nova Scotia Health Research Foundation Establishment ( MED-EST-2014-9605 ) and Develop and Innovation ( MED-DI-2014-9558 ) grants.

Publisher Copyright:
© 2018 Elsevier Ltd

ASJC Scopus Subject Areas

  • Biophysics
  • Biomedical Engineering
  • Orthopedics and Sports Medicine
  • Rehabilitation

PubMed: MeSH publication types

  • Comparative Study
  • Journal Article
  • Research Support, Non-U.S. Gov't

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