TT sockets that are excessively extended cause excessive pressure in which area?

When transtibial (TT) sockets are excessively extended, they can create inappropriate pressure distribution across the residual limb. Specifically, excessive extension of the socket tends to concentrate pressure in the anterior-proximal region of the limb.

This phenomenon occurs because an extended position of the socket can lead to the tibia being too far anterior, thereby increasing pressure on the anterior portion of the proximal socket. The anatomy of the residual limb allows for this region to be particularly sensitive to applied loads, and when the socket is not aligned properly, it can lead to discomfort and even skin issues due to the localized pressure on the anterior-proximal area.

Understanding the alignment of TT sockets is crucial in prosthetic design and fitting, as improper alignment can significantly affect the function and comfort of the prosthesis. Proper assessment and adjustment are necessary to ensure that pressure is distributed evenly and does not lead to complications for the user.