Method of shaping an endo-prosthesis, a femoral head prosthesis, an acetabulum prosthesis and a method of fixing a femoral head prosthesis in a bone
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United States of America Patent
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-
Aug 20, 1991
Grant Date -
N/A
app pub date -
Nov 3, 1988
filing date -
Nov 3, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
According to the present invention, the stress patterns at the interface between bone and cement of an existing prosthesis are calculated by a finite element model. For this model the external load, material properties and boundary conditions are provided. By means of advanced digital computers, stresses and strains in the model are calculated. Desired stress patterns are achieved through an optimization procedure to determine that geometry which generates those stress patterns which approximate the desired ones best.
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