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Frictional action at lower limb/prosthetic socket interface

M Zhang1, A R Turner-Smith, V C Roberts

  • 1Department of Medical Engineering & Physics, King's College School of Medicine & Dentistry, London, UK.

Medical Engineering & Physics
|April 1, 1996
PubMed
Summary
This summary is machine-generated.

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Friction at the stump/socket interface is crucial for amputee mobility, aiding in load support and preventing prosthesis slippage. Optimizing friction balances comfort, tissue health, and prosthetic stability.

Area of Science:

  • Biomechanics
  • Biomaterials
  • Prosthetics

Background:

  • The stump/socket interface is critical for prosthetic limb function.
  • Frictional forces at this interface can cause tissue damage and amputee discomfort.
  • Understanding friction's role is key to improving prosthetic design and wearer experience.

Observation:

  • Friction generates stresses in stump tissues, potentially leading to damage.
  • Both normal and shear stresses are implicated in amputee discomfort and tissue injury.
  • Clinical measurements show higher pressures at lubricated interfaces compared to normal ones.

Findings:

  • Finite element and simplified models demonstrate friction's vital role in supporting body weight during gait.
  • Friction is essential for preventing prosthesis slippage during the swing phase of walking.

Related Experiment Videos

  • Optimizing the coefficient of friction is necessary to balance load support and slip reduction.

    • Implications:

    • Proper friction management can enhance amputee comfort and reduce tissue damage.
    • This research informs the design of prosthetic sockets for improved functionality and user well-being.
    • Further studies can refine friction coefficients for personalized prosthetic fittings.