用以插入骨骼固定元件的器具及该器具之系统与多轴式骨骼固定元件;INSTRUMENT FOR INSERTING A BONE ANCHORING ELEMENT AND SYSTEM OF SUCH AN INSTRUMENT AND A POLYAXIAL BONE ANCHORING ELEMENT

摘要

一种器具，用于插入一骨骼固定元件至骨骼。器具包括一轴(2)，其具有一端部(23、23’)以接合该骨骼固定元件与传送扭力至该骨骼固定元件(1、1’)以及一定义一旋转轴(R)的纵向轴；一切割元件(4、4’)连接至轴(2)且具有用于切割骨骼材料的切割部(45)；其中该切割元件(4、4’)具有一由切割部(45)定义的外直径(D)，其实质上相同或大于该多轴式骨骼固定器的一接受部(500)在其一底端(500b)的一区域的一外直径。; a cutting member (4, 4’) connected to the shaft (2) with cutting portions (45) that are configured to cut bone material; wherein the cutting member (4, 4’) has an outer diameter (D) defined by the cutting portions (45) that is substantially the same or larger than an outer diameter (dd) of a receiving part (500) of the polyaxial bone anchor in a region at a bottom end (500b) of the receiving part.