Interbody fusion cage capable of realizing pressurizing bone grafting and matching with height of intervertebral space

Abstract

The invention discloses an interbody fusion cage capable of realizing pressurizing bone grafting and matching with the height of an intervertebral space. The interbody fusion cage comprises a frame, wherein the frame is in a vertically-through rectangular shape, a power sliding block is connected into the frame in an embedded mode, supporting plates are arranged at the upper end and the lower endof the power sliding block respectively, ribs are arranged on the supporting plates, a groove is formed in the power sliding block; and the supporting plates and the power sliding block are embedded and connected through the ribs and the groove; a rear through hole is formed in the rear end of the frame, the rear end of the power sliding block is connected with a screw through a thread, and the screw penetrates through the rear through hole to be arranged on the frame in a sleeving manner; a groove is also formed in the circumferential direction of the screw, and the groove and a fixed shaft pin cooperate to realize the purpose that the screw cannot move in the axial direction; and a front through hole is formed in the front end of the frame, the front end of the power sliding block is connected with a guide pin pipe in a sliding assembly mode, and the guide pin pipe is connected to the front end of the frame in a threaded mode;. The structural design that the height of the interbody fusion cage is adjustable is adopted, through linked control of the guide pin pipe, the screw and the power sliding block, perfect matching of the height of the interbody fusion cage and the height ofa physiological intervertebral space is realized, and the purpose of parallel lifting height of the intervertebral space after implantation is achieved.

Description

technical field [0001] The invention relates to the technical field of fusion devices, in particular to an intervertebral fusion device capable of pressurizing bone grafts and matching the height of the intervertebral space. Background technique [0002] Traditional intervertebral fusion cages do not have the function of height adjustment. Intervertebral fusion cages of different specifications need to be used in different intervertebral space heights. The types are complex, which increases the difficulty of surgery, requires a long operation time, and the operation process is complicated; [0003] The existing intervertebral fusion surgery is suitable for open surgery due to the excessive volume of the intervertebral fusion device. The large volume fusion device damages the original stable structures such as the articular process and the fibrous ring of the intervertebral disc too much, resulting in spinal instability. Finally, a nail rod must be added for fixation, which n...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of expandable fusion cage are: although the main body of this type of fusion cage can adapt to the height or area of ​​the intervertebral space of different segments, the range of distraction height is limited, and the volume is generally large, and it is more generally suitable for open surgery. The volume fusion cage damages the original stable structures such as the articular process and intervertebral disc fibrous ring too much, resulting in spinal instability. After surgery, nail rods must be added for fixation, which not only increases the difficulty of the operation, prolongs the operation time, and increases the operation cost, but also damages the nerve root. There is also a greater chance of injury

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