Shrapnel fixed anterior cervical zero-profile intervertebral fusion

Abstract

The invention relates to a shrapnel fixed type anterior cervical spine zero-incisura interbody fusion cage. The shrapnel fixed type anterior cervical spine zero-incisura interbody fusion cage comprises a fusion cage main body forming a micro-movable clearance buckling connection, a fixed component, and shrapnel fixed plates inserted into an implant cavity of the fixed components inserted into an implant cavity of the fixed components form forming included angles; the fixed component is composed of a block body, a first implant cavity and a second implant cavity which are arranged on an upper end surface and a lower surface of the block body and mutually penetrate the front end surface, clamping arms which are convexly arranged on two sides of the block body, vertical to the block body, andinserted into inclined sliding chutes of the fusion cage main body, clamping hooks which are arranged at ends of the clamping arms and extend inwardly and vertically, and retaining sliding slots which are formed behind the implant cavities on the upper surface and the lower surface of the block body and parallel to the implant cavities; two shrapnel fixed plates are orderly implanted into the vertebral in opposite included angles through the first implant cavity and the second implant body; the elastic bulges on the shrapnel fixed plates are matched with the retaining clamping slots on the fixed component; the fusion cage main body is composed of a U-shaped frame, sawteeth convexly arranged on two end surfaces, and the inclined sliding chutes which are symmetrically formed on the waist outer sides of the U-shaped frame and inwardly extend from the outer end walls.

Description

Technical field [0001] The invention relates to an anterior zero-notch cervical intervertebral fusion cage fixed by shrapnel. Background technique [0002] There are more than ten zero-notch cervical interbody fusion products such as PEEK PREVAIL, Zero~P, ROI~C, MC+, COALITION, STALIF~C, etc., which have been widely used in Europe, America and Asia. However, there are few self-designed zero-notch fuser products authorized in China, and most of the products that have been authorized and are applying for changes in the shape and size of foreign products, and there are fewer products with innovative structural designs. [0003] CN104068949.A discloses an anterior cervical zero-notch intervertebral fusion device. The structure includes a PEEK thick plate fusion cage and two TC4 fastening screws. The upper and lower sides of the thick plate fusion cage are provided with limit stoppers. To prevent excessive implantation, the upper and lower vertebral body fixation holes are connected wi...

AI Technical Summary

Problems solved by technology

[0002] There are already more than ten kinds of zero-profile cervical intervertebral fusion devices such as PEEK PREVAIL, Zero~P, ROI~C, MC+, COALITION, STALIF~C, etc., which have been widely used in Europe, America, Asia and other places. However, there are few self-designed zero-notch fuser products authorized in China, most of which have been authorized or are applying for changes based on the structural shape and size of foreign products, and there are few products with innovative structural designs.

[0003] CN104068949.A discloses an anterior cervical zero-notch intervertebral fusion device. The structure includes: a PEEK thick-plate fusion cage and two TC4 fastening screws, and the upper and lower sides of the front of the thick-plate fusion cage are provided with limit stops , to prevent excessive implantation, the upper and lower vertebral body fixation holes are connected with two fastening screws to achieve low-notch product fixation, but the metal is fixed on the non-metal through threaded connection, and the non-metal wears more seriously under the condition of force, which is easy It will lead to unstable connection and screw protruding, affecting the service life of the product

[0004] CN202740160.U discloses a locking intervertebral fusion device. The positioning plate and the fixing member adopt an integrated structure, and are fixed on the vertebral body by fastening screws, which can realize the effective fixation and fusion of the zero-notch fusion device product, but the The patent does not involve the specific integrated connection method of the positioning plate and the fixed member, and the integrated connection method does not allow micro-movement of the vertebral body at the initial stage of implantation, which will lead to non-fusion and affect the postoperative fusion rate and practical application of the product Effect

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