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Parametric modelling of a knee joint prosthesis

L P Khoo1, J C Goh, S L Chow

  • 1School of Mechanical and Production Engineering, Nanyang Technological University, Singapore.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|January 1, 1993
PubMed
Summary

This study introduces a parametric model for knee joint prostheses, enabling custom designs for Asian knees. This approach facilitates rapid, economical production of patient-specific implants.

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Area of Science:

  • Biomedical Engineering
  • Orthopedic Surgery
  • Medical Device Design

Background:

  • Knee joint prostheses are crucial for restoring mobility in patients with severe knee damage.
  • Existing prostheses may not optimally fit diverse patient anatomies, particularly smaller Asian knee joints.
  • Parametric modeling offers a pathway to customizable implant design.

Purpose of the Study:

  • To establish a parametric model for knee joint prostheses.
  • To develop a prototype prosthesis tailored for patients with small Asian knee joints.
  • To explore rapid and economical production of customized knee prostheses.

Main Methods:

  • Utilized reverse engineering techniques to reconstruct commercial prosthesis designs in CATIA (Computer-Aided Design).

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  • Developed parametric models based on reconstructed designs.
  • Integrated parametric models with clinical data from 21 pairs of cadaveric Asian knees.

    • Main Results:

    • Successfully established parametric models for knee joint prostheses.
    • Developed a prototype prosthesis suitable for a small Asian knee joint.
    • Identified the need for parameter modification due to unique Asian knee anatomy.

    Conclusions:

    • Parametric modeling is a viable approach for knee prosthesis design.
    • Customization is essential for optimal fit, especially for specific populations like Asian individuals.
    • The proposed method offers potential for rapid and cost-effective production of patient-specific knee implants.