Abstract
The purpose of this study was to objectively evaluate
the fit of sockets for trans-tibial stumps in
order to establish a guideline for use in the automated
production of prosthetic sockets. Subjects
were 24 trans-tibial amputees. Using a CAD/CAM
system, 11 parameters regarding the 3D shape of
the stumps and the sockets were objectively evaluated.
A correlation was found between the activity
level and the upper and lower volumes of the
socket, and between the cause of amputation and
the upper volume of the socket. It was considered
desirable to make the lower part of the socket looser
for patients with lower activity levels, to make the
upper part tighter for patients with higher activity
levels, and to make the upper part looser for
amputation patients with peripheral circulatory
diseases.
