DOUBLE LEAD BONE SCREW
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United States of America Patent
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N/A
Issued Date -
Oct 13, 2005
app pub date -
Mar 30, 2004
filing date -
Mar 30, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A bone screw is provided having a head and a shank with opposed first and second helical threads extending there around. In one embodiment, the shank has a proximal portion with a constant minor diameter, and a distal portion with a minor diameter that decreases in a proximal-to-distal direction to form a taper. The opposed first and second helical threads preferably define a thread depth that remains constant along the length of the shank. In an exemplary embodiment, a major diameter of the shank at a distal tip of the shank is equal to or less than the minor diameter of the proximal portion of the shank.
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