FIXING DEVICE FOR VERTEBRAE

摘要

PURPOSE: A fixing device for vertebrae is provided to prevent the ejection of a rod fixing member in a bending process of a rod from an external shock by forming a cap part of the rod fixing member to hold a head part of a vertebra screw member. CONSTITUTION: A fixing device for vertebrae includes a screw member(20) and a rod fixing member(50). The screw member(20) includes a screw part(30) and a head part(40). The screw part(30) is inserted into a vertebra. The head part(40) includes a cutting groove(42), a plurality of wings(44), and a first thread(46). A rod(10) is installed in the cutting groove(42). The wings(44) are formed at both sides of the cutting groove. The first thread(46) is formed on each inner wall of the wings. The fixing member(50) includes a fixing part(60) and a cap part(70). A second thread(62) is formed on an outer circumference of the fixing part(60). The fixing part is combined with a top end of the head part. The cap part(70) is formed at a top end of the fixing part in order to hold the wings of the head part.