Intervertebral fusion device with bone ingrowth micropores for lumbar vertebrae

Abstract

The invention discloses an intervertebral fusion device with bone ingrowth micropores for lumbar vertebrae. The fusion device includes a fusion device body of a tetrahedral structure with a rectangular cross section, wherein the fusion device body is defined by connecting a front device wall, a left device wall, a rear device wall and a right device wall in sequence; the upper end surfaces of theleft device wall, the rear device wall and the right device wall are provided with jagged grooves, and the bone ingrowth micropores are vertically formed in the bottoms of the jagged grooves; the upper end surface of the front device wall is provided with multiple through holes, and the middle of the front end surface is provided with a threaded hole; the interior of a device wall at the junctionbetween the left device wall and the rear device wall and the interior of a device wall at the junction between the right device wall and the front device wall are provided with developing needles. Polyether-ether-ketone materials are used, bone implanting windows and the developing needles are designed, the micropores for bone ingrowth components are added, and the developing needles are used fordisplaying the implanting position of the fusion device under an X ray; during an operation, by implanting the bone ingrowth components identical with the micropores in diameter in the bone ingrowthmicropores for artificial bone induction, the bone fusion on supported surfaces can be improved, the intervertebral fusion areas are increased, and the function of improving the stability of a vertebrae after the intervertebral fusion operation is achieved.

Description

technical field [0001] The invention belongs to an intervertebral fusion device, in particular to a lumbar intervertebral fusion device with bone ingrowth microholes. Background technique [0002] Lumbar intervertebral disc herniation and spondylolisthesis are one of the common diseases in spinal surgery. The effective way to treat lumbar disc herniation is to perform intervertebral fusion surgery. The lumbar fusion device with the same shape of the intervertebral disc can achieve immediate stabilization of the lumbar spine, promote fusion, rebuild and maintain the intervertebral height and the physiological curvature of the lumbar spine. [0003] At present, common lumbar fusion cages do not have microholes on the support surface, so the area of ​​bony fusion on the coronal surface of the lumbar vertebral body is small, and there are only fusion areas at the upper and lower ends of the bone grafting window. Intervertebral fusion cages need to be implanted for a long time I...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem existing in the prior art that under the effect of vertebral body growth, the bone in the bone graft window area grows too fast, and it is easy to suspend the upper and lower support surfaces of the fusion device, resulting in insufficient support force on the support surface of the fusion device and load-bearing transfer. With the physiological activities of the human body, the fusion bone in the area of ​​the only bone graft window will increase, resulting in fracture of the intervertebral fusion bone and instability of the lumbar vertebral body. Its purpose is to provide a lumbar intervertebral fusion device with bone ingrowth microholes

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