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Related Experiment Videos

Comparative analysis of below-knee prosthetic socket liner materials

R Emrich1, K Slater

  • 1School of Engineering, University of Guelph, Ontario, Canada.

Journal of Medical Engineering & Technology
|May 23, 1998
PubMed
Summary

This study compared four prosthetic socket liner materials for below-knee use. Bock-Lite offers superior durability, while silicone and polyurethane provide better grip but may require more frequent replacement.

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Area of Science:

  • Biomaterials Science
  • Prosthetics and Orthotics
  • Rehabilitation Engineering

Background:

  • Prosthetic socket liners are crucial for patient comfort and function in lower-limb amputations.
  • Material selection impacts liner durability, fit, and user experience.
  • Below-knee prosthetics require materials that withstand mechanical stress and maintain skin contact.

Purpose of the Study:

  • To evaluate and compare the performance of four common prosthetic socket liner materials.
  • To determine the suitability of Bock-Lite, Pedilin, polyurethane, and silicone for below-knee prosthetic applications.
  • To assess material properties relevant to in-use performance, including durability and friction.

Main Methods:

  • Materials tested: Bock-Lite, Pedilin, polyurethane, and silicone.

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  • Key tests included compression resistance, flexural abrasion resistance, and static/dynamic friction coefficients.
  • Tests simulated end-use conditions involving compressive, shear forces, and skin-socket interface prediction.

    • Main Results:

    • Bock-Lite and silicone demonstrated high compression resistance.
    • Bock-Lite exhibited good resistance to flexural abrasion, indicating high durability.
    • Polyurethane and silicone showed high coefficients of frictional resistance, suggesting better retention.

    Conclusions:

    • Bock-Lite is the most durable material but may have reduced grip due to its low friction coefficient.
    • Silicone and polyurethane offer better retention but are more susceptible to tearing and compression, potentially necessitating frequent replacement.
    • Material choice involves a trade-off between durability and in-use stability for below-knee prosthetic liners.