Knee stiffness and viscosity: New implementation and perspectives in prosthesis development

Authors

  • Klemen Bohinc Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
  • Nejc Vantur Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
  • Drago Torkar Computer Systems Department, Jožef Stefan Institute, Ljubljana, Slovenia
  • Tomaž Lampe Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
  • Marija Hribernik Department of Anatomy, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
  • Miroljub Jakovljević Department of Physiotherapy, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia

DOI:

https://doi.org/10.17305/bjbms.2017.1765

Keywords:

Infrared camera, knee viscosity and stiffness, prosthesis, pendulum test

Abstract

The pendulum test is a method applied to measure passive resistance of the knee. A new and simple pendulum test with instrumentation based on infrared camera was used to evaluate knee stiffness and viscosity on a female human cadaver. The stiffness and viscosity were calculated based on the kinetic data. During the measurements, the periarticular and intraarticular soft tissue of the knee was gradually removed to determine the stiffness and viscosity as a function of the tissue removal rate. The measurements showed that the removal of tissue around the joint reduces the damping of leg oscillation, and therefore decreases the stiffness and viscosity. The contribution to knee joint damping was 10% for the skin, 20% for ligaments, and 40% for muscles and tendons. Tissue removal has a very large impact on the knee stiffness and viscosity.

Author Biographies

  • Klemen Bohinc, Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
    Prosthetics Department
  • Nejc Vantur, Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
    Prosthetics Department
  • Drago Torkar, Computer Systems Department, Jožef Stefan Institute, Ljubljana, Slovenia
    Computer Systems Department
  • Tomaž Lampe, Prosthetics Department, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
    Prosthetics Department
  • Marija Hribernik, Department of Anatomy, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
    Department of Anatomy
  • Miroljub Jakovljević, Department of Physiotherapy, Faculty of Health Sciences, University of Ljubljana, Ljubljana, Slovenia
    Department of Physiotherapy

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Knee stiffness and viscosity: New implementation and perspectives in prosthesis development

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20-05-2017

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1.
Knee stiffness and viscosity: New implementation and perspectives in prosthesis development. Biomol Biomed [Internet]. 2017 May 20 [cited 2024 Mar. 28];17(2):164-71. Available from: https://bjbms.org/ojs/index.php/bjbms/article/view/1765