Screw element for use in spinal, orthopedic or trauma surgery and a system of such a screw element and a screw driver adapted thereto
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United States of America Patent
Stats
-
Jan 16, 2018
Issued Date -
N/A
app pub date -
Apr 13, 2015
filing date -
Apr 15, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A screw element includes a screw axis, a shank for inserting in a bone, and a drive portion for engaging a screw driver. The drive portion includes a first wall defining a first recess and a second wall defining a second recess. Drive grooves are formed in the first wall and extend parallel to the screw axis. The second wall extends axially from a free end portion of the screw element to the first wall and has an inner diameter that continuously increases from the first wall towards the free end portion. A plurality of guide grooves are formed in the second wall at circumferential positions corresponding respectively to circumferential positions of the drive grooves. The guide grooves extend further radially from the screw axis than the drive grooves and guide the screw driver from the free end portion of the screw element to the drive grooves.
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Family
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