Forward dynamic simulations of a toe-rise task were developed to explore the outcomes of plantar fasciotomy, a surgery commonly performed to relieve heel pain. The specific objectives of this study were to develop such a simulation, validate its predictions, and simulate rising on toes using a model from which the plantar fascia had been removed. Root-mean squared differences between the intact model and measurements of healthy subjects were found to be 0.009 body weights (BW) and 0.055 BW for the horizontal and vertical ground reaction forces and 7.1 mm, 11.3 mm, and 0.48 deg for the horizontal, vertical and rotational positions of the pelvis. Simulated plantar fasciotomy increased passive arch torques by 7.4%, increased metatarsal head contact forces by 18%, and resulted in greater toe flexor activity. These simulations may explain the mechanisms behind plantar fasciotomy complications when patients perform activities that require loading of the plantarflexors and the longitudinal arch.
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April 2004
Technical Papers
Changes in Foot Loading Following Plantar Fasciotomy: A Computer Modeling Study
Ahmet Erdemir, Ph.D.,
Ahmet Erdemir, Ph.D.
Department of Biomedical Engineering, The Cleveland Clinic Foundation, Cleveland, OH 44195, USA
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Stephen J. Piazza, Ph.D.
Stephen J. Piazza, Ph.D.
Center for Locomotion Studies, Departments of Kinesiology, Mechanical Engineering, and Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA
Department of Orthopaedics and Rehabilitation, The Pennsylvania State University, Hershey, PA 17033, USA
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Ahmet Erdemir, Ph.D.
Department of Biomedical Engineering, The Cleveland Clinic Foundation, Cleveland, OH 44195, USA
Stephen J. Piazza, Ph.D.
Center for Locomotion Studies, Departments of Kinesiology, Mechanical Engineering, and Bioengineering, The Pennsylvania State University, University Park, PA 16802, USA
Department of Orthopaedics and Rehabilitation, The Pennsylvania State University, Hershey, PA 17033, USA
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division November 15, 2002; revision received June 13, 2002. Associate Editor: M. Hull.
J Biomech Eng. Apr 2004, 126(2): 237-243 (7 pages)
Published Online: May 4, 2004
Article history
Revised:
June 13, 2002
Received:
November 15, 2002
Online:
May 4, 2004
Citation
Erdemir, A., and Piazza, S. J. (May 4, 2004). "Changes in Foot Loading Following Plantar Fasciotomy: A Computer Modeling Study ." ASME. J Biomech Eng. April 2004; 126(2): 237–243. https://doi.org/10.1115/1.1691447
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