ADJUSTABLE COMPOSITE OF CERVICAL VERTEBRAL PROSTHESIS AND CONNECTION PORTION BETWEEN CERVICAL VERTEBRAE

摘要

An adjustable composite of a cervical vertebral prosthesis and a connection portion between the cervical vertebrae includes a vertebral member and two endplates (1) connected to an upper end and a lower end of the vertebral member respectively by ball joints. The vertebral member is composed of an upper vertebral member (2) and a lower vertebral member (3). The upper vertebral member (2) and the lower vertebral member (3) are connected axially by threads. Several threaded bores (7) are axially correspondingly arranged on circumferential sidewalls of the upper vertebral member (2) and the lower vertebral member (3). Between the threaded bores (7) of the upper vertebral member (2) and the lower vertebral member (3) is further provided a screw (5) for fixing the length. Screws (4) for fixing the endplates are provided on two endplates (1), respectively.