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Related Experiment Videos

The HPC-device: a method to quantify the heel pad shock absorbency.

U Jørgensen1, E Larsen, J E Varmarken

  • 1Department of Orthopaedic Surgery, Rigshospittalet University of Copenhagen, Denmark.

Foot & Ankle
|October 1, 1989
PubMed
Summary
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This study developed a new device to measure heel pad shock absorbency, crucial for understanding heel pain. Findings show shock absorption decreases with age and differs between sexes, impacting overuse injuries.

Area of Science:

  • Biomechanics
  • Orthopedics
  • Sports Medicine

Background:

  • Heel pad shock absorbency is vital in heel strike-related pain conditions.
  • Existing methods for quantifying shock absorbency may lack clinical usability.

Purpose of the Study:

  • To develop a simple, clinically applicable method for quantifying heel pad shock absorbency.
  • To evaluate the developed device's suitability and reproducibility.

Main Methods:

  • Development of the Heel Pad Compression (HPC)-device, comprising a fixing device and transducer.
  • Assessment of HPC-device's suitability for evaluating heel pad force/deformation characteristics.
  • Validation using cadaver heel pads and drop tests, and testing on 200 normal heel pads.

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Main Results:

  • The HPC-device demonstrated high reproducibility (0.96) for heel pad deformation.
  • High correlation found between HPC results and drop test shock absorbency in cadavers.
  • Shock absorption decreased with age and was significantly higher in men than women.
  • Men had thicker heel pads, but no linear correlation existed between thickness and absorbency, except for the thinnest pads.

Conclusions:

  • The HPC-device is a clinically usable tool for evaluating heel pad shock absorbency.
  • Heel pad shock absorption is influenced by age and sex, with implications for overuse injuries.
  • Further research will explore the role of heel pad shock absorption in developing overuse injuries.