Femoral stem for artificial coxal articulation and method for processing neck portion thereof
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United States of America Patent
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Dec 25, 2007
Grant Date -
Dec 1, 2005
app pub date -
May 2, 2005
filing date -
May 28, 2004
priority date (Note) -
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Abstract
Disclosed are a femoral stem for artificial coxal articulation, in which portions of the femoral stem interfering with and contacting an insertion in the joint movement of the femoral stem are removed from the femoral stem so as to maximize the range of the joint movement thereof while maintaining the cross sectional area thereof, and a method for processing a neck portion of the femoral stem. The method includes cutting symmetrical portions of the outer circle of a circular rod to form cutting planes inwardly inclined such that the cutting planes contact a virtual inner circle having the same center as that of the outer circle; and rounding a portion between the cutting planes along the inner circle so that the inner part of the outer circle is shorter than the outer part of the outer circle.
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