Modular Cervical Hook Vertebral Fusion Cage

Abstract

The invention discloses a combined cervical hook-vertebral joint fusion device, which belongs to the field of medical equipment, and provides a combined cervical hook-vertebral joint fusion device that is more convenient for implantation and installation, including an intervertebral support body and a hook-vertebral joint The fusion component, the hook vertebra joint fusion component includes a circle of cofferdam, and inside the cofferdam is a bone graft cavity that runs through up and down, and a hook vertebra joint fusion component is respectively arranged on the left and right sides of the supporting body between the vertebral bodies; it also includes a connecting The intervertebral support body and the hook-vertebral joint fusion component are arranged separately, and the intervertebral support body and the hook-vertebral joint fusion component can be assembled and installed through the connecting piece. In the present invention, by setting a split structure, implantation and installation can be performed successively during implantation and installation, which avoids the problem of difficult implantation caused by simultaneous implantation when an integrated structure is provided. In addition, by setting a deformable cofferdam, it can facilitate its implantation and installation operation and improve the effect of fitting, and it is also more conducive to early osteogenesis and fusion.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an assembled cervical hook-vertebral joint fusion device. Background technique [0002] Anterior cervical decompression and fusion (ACDF) has always been an effective and classic surgical method for the treatment of cervical degenerative diseases. Anterior cervical plate, cervical intervertebral fusion device and other implant materials can improve the initial stability, support strength and bone graft fusion rate of ACDF surgery. Among them, the basic purpose of the design of the cervical intervertebral fusion device is to maintain and improve the curvature of the cervical spine on the basis of providing good initial stability and support strength, and to provide a good biological and biomechanical environment for intervertebral fusion to promote bone grafting. fusion. [0003] There are many types of cervical fusion cages on the market, but the basic design is still a cylin...

AI Technical Summary

Problems solved by technology

[0006] First, the elastic support body between the vertebral bodies and the fusion parts of the hook vertebral joints on both sides adopt an integrated structure design, resulting in the irregular joint space between the vertebral bodies during the implantation process, resulting in the elastic support body between the vertebral bodies and the joints on both sides It is difficult to implant and install the hook vertebral joint fusion components at the same time, so the installation and implantation operation is difficult;

[0007] Second, because the joint space of the hook vertebra is irregular, and the original joint fusion component of the hook vertebra is a single height-invariable structure, on the one hand, it is difficult to implant and install; The bone surface of the body is completely attached, which affects the postoperative recovery effect;

[0008] Third, the intervertebral elastic support body and the hook vertebra joint fusion components on both sides adopt an integrated structure design, but in actual conditions, the stress distribution between the intervertebral elastic support body and the lateral hook vertebra joint fusion components is inconsistent, so the operation Stress concentration often exists when the patient’s neck moves. Therefore, if the elastic support body between the vertebral bodies and the fusion components of the hook vertebra joints on both sides cannot effectively move relative to each other, the stress will not be distributed in various areas of the fusion cage, which will affect Patient Bone Graft Healing and Rehabilitation

[0009] Fourth, the elastic support body between the vertebral bodies is directly connected to the upper and lower vertebral bodies by screws, which lacks the necessary amount of activity, and there is a risk of stress concentration that may cause complications such as screw withdrawal, breakage, and bone resorption around the screw; at the same time, due to the lack of necessary The amount of activity leads to the lack of stress stimulation caused by micro-movement at the hook vertebral joint, which is not conducive to bone graft fusion and postoperative rehabilitation of patients

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