No Longer Smooth: Introducing Striations into Prosthetic Socket Construction to Improve Suspension, Rotation, Fit and Comfort

Project: Research project

Project Details

Description

This application addresses the FY15/16 JPC-8/CRMRP NMSIRA Focus Area “Current assistive technology,
including prosthetic and orthotic, characteristics that limit patient interaction, usability and
durability,” specifically “lack of human-device interface to address limb health, comfort, and
function,” which are major concerns for persons with amputation.

The prosthetic socket forms the interface between the residual limb and prosthesis, as such it is
responsible for the comfortable and efficient transfer of load bearing forces between the human and
device. It has long been a paradigm in the field of prosthetics that sockets must be smooth in
order to be comfortable, and this was especially true when subjects wore rigid sockets directly in
contact with the residual limb. However, the introduction of elastomeric (gel) liners worn between
the residual limb and rigid socket obviate the need for a totally smooth socket or liner. Hence, it
has been postulated that textured interfaces may improve socket stabilization and suspension by
increasing friction at the interface between the socket, liner and residual limb. Textured surfaces
increase the surface area in contact between objects and hence increase the coefficient of sliding
friction.
StatusFinished
Effective start/end date9/30/163/29/21

Funding

  • U.S. Army Medical Research and Materiel Command (W81XWH-16-1-0485)

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