Prosthetic device with predetermined crystal orientation
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United States of America Patent
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-
Jun 12, 1990
Grant Date -
N/A
app pub date -
Jul 6, 1989
filing date -
Jul 6, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Prosthetic device such as bone plates, stem-type prostheses such as femoral or humeral prostheses, or intramedullary rods are substantially improved by utilizing casting techniques that provide columnar or monocrystalline grain structure, with the <001> crystal direction oriented substantially parallel to the neutral axis, thereby increasing flexibility of the prosthesis and increasing loading on the bone, whereby disuse-atrophy is reduced and bone healing is facilitated; similarly, the crystal direction may be oriented to increase the stiffness of the prosthesis to resist tension.
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