Adjustable interbody fusion device

Abstract

The invention relates to an adjustable interbody fusion device and belongs to the technical field of body insertions of medical instruments. The adjustable interbody fusion device comprises a front fixed structure, a back fixed structure, a movable structure and a fastening structure. The movable structure is arranged in the middle portion of the front fixed structure and the middle portion of the back fixed structure, and after the front fixed structure and the back fixed structure are connected through the movable structure, in the implanting process, the front fixed structure, the movable structure and the back fixed structure can be further fastened into a whole through the fastening structure. The adjustable interbody fusion device can be implanted into intervertebral space through a small incision or a path. The adjustable interbody fusion device has the advantages that the contact area between the device and implanted sclerotin and centrum surface is large, stress distribution is wide, and supporting is high, and the adjustable interbody fusion device can be used for cases such as a cervical lumbar vertebrae degenerative disease. The adjustable interbody fusion device solves the problems that various interbody fusion devices adopted at present cannot be implanted with the small path, or after an operation, the fusion devices shift or get out of the positions, the centrum collapses, and nonunion rate of the planted sclerotin is high.

Description

technical field [0001] The invention relates to an adjustable intervertebral fusion device, which belongs to the technical field of implants in the human body of medical instruments. Background technique [0002] At present, spinal fusion technology has achieved good results in the treatment of neck and low back pain and instability of the cervical and lumbar spine. In recent years, intervertebral fusion device implantation is being widely carried out, and a certain degree of clinical satisfaction has been obtained, but the corresponding complications cannot be ignored, such as the displacement, prolapse, and collapse of the fusion device, or vertebral body collapse, implantation, etc. Bone nonunion, inconvenient implantation or nerve damage due to too large fusion cage; some doctors implant a large amount of bone between the vertebral bodies before the fusion cage is implanted in order to improve the fusion effect after bone grafting. However, after the fusion device is im...

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Problems solved by technology

Some scholars have also analyzed based on experiments that when the shape of the fusion cage is similar to the "cross" distribution, the stress distribution is more uniform, the possibility of prosthesis prolapse is less, and the risk of vertebral body collapse is lower, but the one-piece "cross" shape The middle part of the fusion device is too wide, and its implantation operation is difficult, and there is no such product on the market at present

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