Acetabular cup with bi-directional steps
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United States of America Patent
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-
Oct 31, 2000
Grant Date -
N/A
app pub date -
Nov 21, 1997
filing date -
Nov 21, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An acetabular cup having an outer surface with a first set of steps formed in a first direction and a second set of steps formed in a different, second direction is effective to provide positional stability and enhanced load transfer after implantation in the acetabulum. The stepped outer surface of the acetabular cup provides a significant increase in effective surface area. The multi-directional first and second steps convert shear loads to compressive loads in their respective directions, resulting in enhanced fixation of the cup.
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