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Screw element for use in spinal, orthopedic or trauma surgery and a system of such a screw element and a screw driver adapted thereto
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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机译:用于脊柱,整形外科或创伤手术的螺钉元件和这种螺钉元件的系统和适用于其的螺钉驱动器
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摘要
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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