Mortise and tenon type cervical vertebra intervertebral fixer

Abstract

The invention relates to the field of medical instruments and in particular relates to a mortise and tenon type cervical vertebra intervertebral fixer including an intervertebral fixer body part inserted into a gap of the cervical vertebral, and a vertical wing-shaped component rotationally connected to one end of the intervertebral fixer body part. The vertical wing-shaped component is formed by a bearing and tenon heads, wherein the bearing is in a spacing and rotary connection with the intervertebral fixer body part; and the bearing extends the tenon heads from toward two sides of the intervertebral fixer body part along a length direction of a cervical vertebra. Compared with the cervical vertebra intervertebral fixer device in the prior art, the mortise and tenon type cervical vertebra intervertebral fixer is suitable for intervertebral fusion and fixation of a lesion segment in a cervical vertebra anterior decompression surgery; the upper and lower vertebral bodies can be squeezed toward the intervertebral fixer body part via fixation between the tenon heads of the vertical wing-shaped component and the mortise and tenon between upper and lower vertebral body bone slots, so a firm and stable integral body can be formed by the upper and lower vertebral bodies and the intervertebral fixer; great stability and firmness can be achieved; the fixer depth can be limited and retraction of the fixer can be prevented; and a favorable condition is provided for final fusion.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a mortise and tenon type cervical intervertebral fixator. Background technique [0002] The main pathological basis of cervical spondylosis is the degeneration and protrusion of the intervertebral disc, the formation of osteophytes at the posterior border of adjacent vertebral bodies, and the thickening or ossification of the posterior longitudinal ligament, resulting in compression of the spinal cord, nerve roots and blood vessels. Surgery for cervical spondylosis mainly focuses on the intervertebral space. The classic surgical operation is to remove the degenerated and protruding intervertebral disc, clean up the osteophyte at the posterior edge of the vertebral body, remove the thickened or ossified posterior longitudinal ligament and its adhesions, sometimes decompress the nerve root at the same time, and then implant bone in the intervertebral body fusion. This cervical deco...

AI Technical Summary

Problems solved by technology

At present, the cervical intervertebral fixation devices on the market are generally hollow columnar or cubic structures. They are fixed by the tooth-like protrusions on the upper and lower surfaces and screws screwed into the upper and lower vertebral bodies. Generally, they need to be used in conjunction with an anterior cervical fixation plate or locking plate. , to increase stability, this fixation method is one of the current mainstream surgical methods, the structure of the cervical intervertebral fixation device is more complicated, and the method of using this cervical intervertebral fixation device is more difficult to operate, and its stability and reliability are relatively high. Difference

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