脊柱、整型或创伤手术用之螺丝元件及其系统;A SCREW ELEMENT FOR USE IN SPINAL, ORTHOPEDIC OR TRAUMA SURGERY AND A SYSTEM OF SUCH A SCREW ELEMENT AND A SCREW DRIVER ADAPTED THERETO

摘要

一种脊柱、整型或创伤手术用之螺丝元件，含螺丝轴线(S)和螺丝螺纹(3)；可供与螺丝起子(20)结合之驱动部(6)，其中驱动部(6)包括第一凹部(7)有壁，和壁上所形成实质上纵向延伸之驱动凹沟(8)，第二凹部(9)介于螺丝元件(1,1')自由端(5)和第一凹部(7)间，其中第二凹部(9)有壁，朝自由端(5)逐渐加大内径；且其中在第二凹部(9)壁，相当于驱动凹沟(8)之位置形成导引凹沟(10)，使螺丝起子的结合部(30)可被导引进入驱动凹沟(8)内。又提供系统，包含螺丝元件及其适用之螺丝起子。; a drive portion (6) for engagement with a screw driver (20), wherein the drive portion (6) comprises a first recess (7) with a wall and substantially longitudinally extending drive grrooves (8) formed in the wall, a second recess (9) between a free end (5) of the screw element (1, 1') and the first recess (7), wherein the second recess (9) has a wall and a gradually increasing inner diameter towards the free end (5); and wherein in the wall of the second recess (9) guide grooves (10) are formed at positions corresponding to the position of the drive grooves (8) that allow an engagement portion (30) of a screw driver to be guided to enter the drive grooves (8). Further, a system is provided that includes the screw element and a screw driver adapted thereto.