Screw element for use in spinal, orthopedic or trauma surgery and a system of such a screw element and a screw driver adapted thereto
作者： Wilfried Matthis , Lutz Biedermann , Dimosthenis Dandanopoulos
DOI:
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摘要: A screw element includes a axis, shank for inserting in bone, and drive portion engaging driver. The first wall defining recess second recess. Drive grooves are formed the extend parallel to axis. extends axially from free end of has an inner diameter that continuously increases towards portion. plurality guide at circumferential positions corresponding respectively grooves. further radially axis than driver
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