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Proceedings Paper

3D model acquisition, design, planning, and manufacturing of orthopaedic devices: a framework
Author(s): Justin R. Kidder; Emily Mason; Bartholomew O. Nnaji
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Paper Abstract

Design and manufacture of orthopedic devices using rapid prototyping technologies has been until recently a highly iterative process that involves multiple users, including doctors, design engineers and rapid prototyping experts. Existing systems for creation of orthopedic parts through rapid prototyping do not follow the principles of concurrent engineering and design for manufacture. This leads to excessive communication between parties and delays in product realization time. In this paper, we lay out the framework for a unified expert system that will enable a doctor to create quickly and easily fully functional prosthetics and orthopedic implants. Necessary components of the model acquisition process should include volumetric segmentation of objects from a CT or MRI dataset and NURBS surface fitting to the boundary points. Finite element analysis and surface model modification modules are also needed, but should be provided in an intuitive fashion for doctors who are not experienced in computer aided design. Preprocessing for rapid prototype building should be automatic, and should include optimal orientation, support structure generation and build simulation modules. Finally, the model should be passed to the rapid prototyping machine in a presliced format for speed and accuracy.

Paper Details

Date Published: 19 December 1996
PDF: 14 pages
Proc. SPIE 2911, Advanced Sensor and Control-System Interface, (19 December 1996); doi: 10.1117/12.262507
Show Author Affiliations
Justin R. Kidder, Univ. of Pittsburgh (United States)
Emily Mason, Univ. of Pittsburgh (United States)
Bartholomew O. Nnaji, Univ. of Pittsburgh (United States)


Published in SPIE Proceedings Vol. 2911:
Advanced Sensor and Control-System Interface
Bartholomew O. Nnaji, Editor(s)

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