Formatted contact-surface adaptation type full support interbody fusion cage

Abstract

A formatted contact-surface adaptation type full support interbody fusion cage comprises an implant assembly, and the rear surface of the implant assembly is connected with an instrument assembly. The formatted contact-surface adaptation type full support interbody fusion cage is characterized in that the implant assembly comprises a front baffle, a supporting rod is arranged on the rear portion of the front baffle and connected with a deformation post, and a rear check ring is arranged on the tail section of the deformation post; meanwhile, the instrument assembly comprises an outer fixed tube, an inner fixed rod is arranged inside the outer fixed tube, a conduction tube is arranged on the periphery of the outer fixed tube, and the tail end of the inner fixed rod is connected with a driving assembly. Thus, by means of the implant assembly, the instrument assembly and the driving assembly, the formatted contact-surface adaptation type full support interbody fusion cage can be effectively matched with the interbody fusion surgery so as to avoid postoperation long-term interbody height loss. Besides, the formatted contact-surface adaptation type full support interbody fusion cage is reasonable in structure, easy and convenient to operate, and convenient to popularize and use.

Description

technical field [0001] The invention relates to a fully supported intervertebral fusion device, in particular to a formatted contact surface adaptable fully supported intervertebral fusion device. Background technique [0002] Spinal fusion is currently one of the main treatments for various spinal disorders. In recent years, with the rapid development of spinal surgery technology, various intervertebral fusion devices (hereinafter referred to as fusion devices, Cage) have been used clinically, such as BAK type, Ray type, Harms type, Brantigan cuboid, cylindrical Cage, low Cutting thread Cage, B-twin intervertebral fusion device, fully integrated vertebral body pillar block, etc., are made of different materials such as titanium alloy and polyether ether ketone, each with its own characteristics. According to whether these fusion cages can be deformed, they can be divided into two categories: non-deformable "traditional" fusion cages and deformable expansion fusion cages. ...

AI Technical Summary

Problems solved by technology

Because the "traditional" fusion cage cannot be deformed, although the corresponding specification can be selected according to the size of the intervertebral space during the operation, the adaptation of this type of fusion cage to the contact surface is not ideal sometimes, and when using a "traditional" fusion cage with a larger size In this case, more bone and larger nerve traction need to be removed, the operation is more difficult, and the risk of nerve injury also increases

Expansion fusion cage represents the future development direction, and has the advantages of less trauma and convenient installation, but currently has the following shortcomings: (1) It is difficult to form an ideal adaptation according to the changes in the surface of the upper and lower vertebral endplates (that is, the contact surface) relation

(2) After the fusion cage expands, it can only provide a few "point supports" on the contact surface. The contact area is small, and it is prone to stress concentration and bone absorption "sinking", resulting in long-term intervertebral height loss after surgery, which may lead to intervertebral foramina stenosis Nerve root entrapment causes clinical symptoms and affects curative effect

Images