Bone fixation apparatus
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United States of America Patent
Stats
-
Jun 14, 2005
Grant Date -
Aug 21, 2003
app pub date -
Feb 4, 2002
filing date -
Oct 31, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a bone fixation apparatus. This device comprises a bone screw having a head; a cap member placed on an upper part of the head of the bone screw; a receiver member having a bore in which the cap member and the head of the bone screw are respectively accommodated and held, and a U-shaped channel through which a support bar extends; and a compression member threadedly coupled into the receiver member to downwardly bias the support bar. A multitude of stepped portions are formed at a lower end and inner surface of the receiver member to be brought into linear contact with an outer surface of a lower part of the head so that the supporting force for the head of the bone screw is increased.
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