Computer-Aided Grid-Editing System for Supporting the Design of Rapid Prototyping Transtibial Sockets

Abstract

This study is to develop an easily-used editing system for designing a transtibial socket that will be fabricated by a rapid prototyping (RP) machine. This study uses STL format data to construct the editing model. This grid-editing system is developed by employing C++/CLI and the OpenGL graphic interface. It could conveniently import three-dimensional scanner data and export appropriate data format for RP machines. The proposed system includes filtering the point data, generating mesh, and editing point data. After being edited, a socket is constructed by the mesh model. The socket model is then coupled with a base that will be used to connect a shank. Because the system only modifies the point data, it could have high efficiency and freedom while designing transtibial sockets. To achieve an easy-to-use program, the self-developed software is very distinct with other commercial software, such as colliding deformation and grid-editing methods. Based on the concept of virtual reality, users could operate this software intuitively. This system may allow a prosthetist to design RP sockets conveniently. The results of case studies demonstrated the feasibility of this grid-editing system for transtibial socket design.