Centrum non-fusion interspinous device

Abstract

The invention discloses a medical instrument and particularly discloses a centrum non-fusion interspinous device which is used for spinal fixation. The device is composed of a front centrum part, a middle centrum part and a rear centrum part, wherein the front centrum part, the middle centrum part and the rear centrum part are sequentially connected into an integral structure. The front centrum part and the rear centrum part are respectively of a U-shaped groove structure. The opening direction of the U-shaped groove of the front centrum part and that of the U-shaped groove of the rear centrum part are opposite. The middle centrum part is of an S-shaped structure, the upper end of the S-shaped structure is located at the bottom of the U-shaped groove of the front centrum part, and the lower end of the S-shaped structure is located at the bottom of the U-shaped groove of the rear centrum part. The centrum non-fusion interspinous device has the advantages that the operation wound is small, the centrum mobility and stability are good after operation, and an implant is not prone to being displaced or disengaged.

Description

technical field [0001] The invention relates to a medical device, in particular to a non-fused vertebral interspinous process device for spinal fixation. Background technique [0002] At present, in the treatment of spinal lesions or injuries, spinal fixation devices are generally used to fix the spine, or artificial vertebral bodies are used as substitutes for surgery. [0003] Commonly used spinal fixation devices are composed of longitudinal rods and pedicle screws, and the connection and fixation of the longitudinal rods and pedicle screws will have a direct impact on the effect and quality of the operation. The connection and fixation of the longitudinal rod and the pedicle screw are all through the fastening method of tightening the screw. This method is not only inconvenient to operate, but also the screw head of the pedicle screw is easy to be stretched out when the screw is tightened, causing surgery fail. If the screw head of the pedicle screw is to be prevented ...

AI Technical Summary

Problems solved by technology

Although some artificial vertebral bodies have the adjustability to restore the height of the vertebral body, the biggest disadvantage is that the mobility of the vertebral body at the surgical site is completely removed.

Obviously, there are still some problems to be solved in some aspects of the traditional artificial vertebral body, especially the insufficient stability of the postoperative vertebral body mobility and the low early bonding strength with the upper and lower vertebral bodies. dislocation or even prolapse, restricted spinal motion at the surgical site, a series of load increases and degeneration acceleration caused by compensatory over-activity of adjacent segments of the spine, etc.

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