Screwed type fusion apparatus among cervical vertebra zygopophysis joints and supporting cutter of fusion apparatus

The invention belongs to the technical field of surgical medical appliances for spine surgery of arthrosteopedic surgery of clinical medicine, and particularly relates to a screwed type fusion apparatus among cervical vertebra zygopophysis joints, which is used for the fusion of the laminectomy for decompression at a cervical posterior. The fusion apparatus is characterized in that the appearance of the fusion apparatus is in the shape of a screw, threads are formed in the fusion apparatus, and the center of the fusion apparatus is of a lozenge hollow structure; the circumferential diameter of the lozenge hollow structure from the tail end to the front end is decreased progressively. The threads are shallow, and a pitch is wide. An entire body is made of a tantalum material, and a micropore structure is formed in the surface of the entire body. When being transplanted, the fusion apparatus needs to be screwed in through a supporting cutter, and the cutter consists of a lozenge cutter head, an elliptic cutter bar and a handle. The lozenge cutter head has a certain taper, and is matched precisely with the lozenge hollow structure of the fusion apparatus. Through the implementation of the fusion apparatus disclosed by the invention, the operative procedure is simplified, the defects that during bone grafting on a rear outer side, massive bleeding is generated, grafted bones are shifted, the grafted bones are in non-fusion, and the like are overcome; because the fusion apparatus is made of the tantalum material, good biocompatibility exists between the fusion apparatus and a human body, the fusion apparatus has a micropore structure similar to the spongy bones of the human body, which is favorable for the growing of the bones, and the fusion of the zygopophysis joints is promoted.