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Related Experiment Videos

Development of a telemeterized shoulder prosthesis

F J Kummer1, T R Lyon, J D Zuckerman

  • 1Department of Bioengineering, Hospital for Joint Diseases Orthopaedic Institute, New York, NY 10003, USA.

Clinical Orthopaedics and Related Research
|September 1, 1996
PubMed
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A novel telemeterized shoulder prosthesis was developed and validated. This implantable device accurately measures forces on the humeral head, showing feasibility for future total shoulder prostheses.

Area of Science:

  • Biomedical Engineering
  • Orthopedic Surgery
  • Biomechanics

Background:

  • Shoulder prostheses are common orthopedic implants.
  • Accurate measurement of in vivo joint forces is crucial for understanding prosthesis performance and failure modes.
  • Current methods for measuring shoulder joint forces are limited.

Purpose of the Study:

  • To develop and test a telemeterized shoulder prosthesis prototype.
  • To evaluate the accuracy of force measurement for load vectors on the humeral head.
  • To assess the feasibility of a fully implantable telemeterized prosthesis.

Main Methods:

  • A prototype shoulder prosthesis was instrumented with three strain gauges.
  • Strain gauges were integrated into a hollow, tapered neck element.

Related Experiment Videos

  • In vitro and cadaver implantation tests were performed to apply and measure load vectors.

    • Main Results:

    • The telemeterized prosthesis accurately determined experimentally applied load vectors.
    • Force measurement resolution was within 5% of actual applied forces.
    • The prototype demonstrated feasibility for further development.

    Conclusions:

    • The developed telemeterized shoulder prosthesis is a feasible design.
    • This technology shows potential for accurate in vivo measurement of shoulder joint forces.
    • Further investigation is warranted for a totally implantable telemeterized prosthesis.