Lumbar interbody fusion device

Abstract

The invention discloses a lumbar interbody fusion device and relates to an orthopedic operation implant. The device has a hollow titanium alloy skeleton for holding bones, wherein the skeleton is shaped like a U-shaped plate; the rear vertical wall of the U-shaped plate does not have any hole, but the front vertical wall of the U-shaped plate has a plurality of holes; the upper and lower two sides of the bottom of the U-shaped plate both has a stepped inclined hole; the big ends of the two inclined holes are both positioned on the bottom faces of the bottoms, and the small ends of the two inclined holes are both positioned on end faces corresponding to the bottoms; and bolts are inserted into the two inclined holes in the U-shaped plate respectively. When the device with small volume is used, little lumbar body is cut off, fusion is more reliable, bleeding of the patient is relieved, and the blood supply to the lumbar body can be maintained. Broken bones are prevented from entering the canalis spinalis, so secondary neurothlipsis is avoided. Collapse is avoided. And a doctor can observe the growth of callus and lumbar interbody fusion conveniently.

Description

technical field [0001] The invention relates to an orthopedic surgical implant. Background technique [0002] In order to repair the injured and damaged vertebral bodies, foreign medical circles have invented artificial vertebral bodies, such as titanium cages (TMC). The titanium cage is a hollow skeleton made of titanium alloy, which is surrounded by a titanium alloy plate with multiple mesh holes, and is equipped with a ring-shaped support inside. When in use, the injured and damaged vertebral body needs to be subtotal cut, and the injured and damaged vertebral body should be chiseled into an empty shell with open sides; then a titanium cage filled with broken bones should be put into it. The point-shaped protrusions at the two ends of the titanium cage respectively withstand the lower end surface of the previous vertebral body and the upper end surface of the next vertebral body. With the growth of the injured and damaged vertebral body, the broken bones in the titanium...

AI Technical Summary

Problems solved by technology

[0003] However, the titanium cage also has the following disadvantages: 1. The shape of the titanium cage determines that its cylindrical volume is huge. In order to implant it into the injured and damaged vertebral body, when performing subtotal resection, on the one hand, the patient has a lot of bleeding, and on the other hand Aspects disrupt the blood supply to the vertebral body

2. The titanium cage only relies on the point-like protrusions at both ends to withstand the upper vertebral body and the next vertebral body, which is prone to collapse

3. Bone grafting is not allowed around the titanium cage, and the titanium cage does not have the function of blocking the spinal canal. The bone graft in the titanium cage may enter the spinal canal again and compress the nerves.

4. The titanium cage encloses the newborn bone; during the imaging examination, the titanium cage will block the rays, making it difficult for the doctor to observe the growth of the callus

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