Improved interbody fusion cage

Abstract

The invention relates to an improved interbody fusion cage which is used for the spine surgery and fits vertebral pedicle intervertebral disc inclined bolt internal fixation. The improved interbody fusion cage is composed of a body part, an upper surface, a lower surface, a left lateral face, a right lateral face, a back arc face and a front inclined face. The right lateral face is of a trapezoidal structure, and small holes are formed in the right lateral face. The inclined angle of the front inclined face ranges from 15 degrees to 75 degrees. Each of the upper surface and the lower surface is provided with a large hole; the large holes are through so that the body part is of a hollow structure. The radian of the back arc face ranges from 15 degrees to 45 degrees and fits the radian of the front edge of the centrum. Each of the back arc face and the front inclined face is high in middle and low in two-side, and the middle parts is 2-3 mm higher than the two sides. An X-ray non-transmission metal marking pin is arranged on the body part. By means of the improved interbody fusion cage, the problem that a common interbody fusion cage cannot fit the vertebral pedicle intervertebral disc inclined bolt internal fixation is solved; meanwhile, the improved interbody fusion cage conforms to intervertebral space anatomical features and is convenient to operate.

Description

[0001] technical field [0002] The invention relates to an improved intervertebral fusion device used in spinal surgery and suitable for oblique screw internal fixation through the pedicle and intervertebral disc. Background technique [0003] In recent years, a new internal fixation with oblique screws through the pedicle and intervertebral disc has been reported. This new internal fixation technology has many advantages such as less trauma, less pain, faster recovery, and fewer complications. It is the future surgical technique. direction of development. However, two screws are placed obliquely from the posterior edge of the lower vertebral body through the intervertebral space into the middle of the upper vertebral body. The common intervertebral fusion cage is blocked by the screws in the intervertebral space and cannot be inserted, while autologous bone insertion alone cannot achieve Mechanical properties and fusion rates of intervertebral fusion cages. In order to m...

AI Technical Summary

Problems solved by technology

However, this "6"-shaped structure is difficult to operate and insert. The front bulge and the head bulge are often blocked by the oblique screws through the pedicle and intervertebral disc. At the same time, because the height of the middle part of the intervertebral space is greater than that of the two sides, the previous uniform height The design often has the disadvantages of being tight on both sides and loose in the middle.

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