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Method of Designing and Manufacturing Artificial Joint Stem with Use of Composite Material

  • US 20080234833A1
  • Filed: 03/23/2004
  • Published: 09/25/2008
  • Est. Priority Date: 03/23/2004
  • Status: Abandoned Application
First Claim
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1. A method of designing and manufacturing an artificial joint stem with the use of a composite material comprising:

  • a first external layer, which is inserted and fixed in an insertion hole formed in a bone without filling cement, torsional stiffness thereof is increased as contacting an internal surface of said insertion hole;

    a main structure layer, which is positioned in an inner side than said first external layer, bending stiffness thereof is increased;

    a core layer with lower stiffness than the main structure layer and the first external layer, which is positioned in an inner side than said main structure layer; and

    a most inner layer, which is positioned between the core layer and the main structure layer;

    steps of performing, as using a computer, an analysis involving an internal stress of said artificial joint stem and an adhesive stress of said artificial joint stem and the bone based on three dimension data indicating a structure of said bone made by using plural bone tomographic images and a design condition involving a form and stiffness of said artificial joint stem configured at least by one of said tomographic images and said three dimension image;

    having said computer to reanalyze as changing said design condition if a result of said analysis fails to satisfy said design condition;

    designing and manufacturing said artificial joint stem using stem data based on said result of said analysis and said design condition if said result of said analysis satisfies said design condition.

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