Interbody fusion device with four unfoldable sides

Abstract

The invention discloses an interbody fusion device with four unfoldable sides. The device comprises a cylinder. A supporting block is in clearance fit with the outer wall of the cylinder through an opening; and fusion blocks are arranged on the outer side of the supporting block. A supporting assembly is arranged in the cylinder. According to the invention, after cooperation of the cylinder, the opening, the support block and the fusion blocks, the four fusion blocks are unfolded step by step in a crossed manner by rotation of a double-end stud, so that the unfolding range of the fusion blockis extended and the spinal cone is supported well; and thus the height and the tension of the spinal cone are recovered conveniently and the spine can better recover the physiological curvature, so that the application range is extended. Because of cooperation of the supporting block, the fusion blocks, and a self-adjusting assembly, automatic rotation of the fusion blocks can be realized to an angle suitable for a contact surface by dynamic balance of balls and universal rotation of the balls when the fusion blocks make contact with the spinal cone; and the contact area between the fusion block and the spinal cone is increased, so that the stability of the supporting effect is greatly improved.

Description

technical field [0001] The invention relates to the technical field of a four-sided openable intervertebral cage, in particular to a four-sided openable intervertebral cage. Background technique [0002] The upper end of the spine supports the skull, lowers the hip bone, attaches to the rib cage, and serves as the back wall of the thoracic, abdominal and pelvic cavities. The spine has the functions of supporting the trunk, protecting the internal organs, protecting the spinal cord, and performing movement. A longitudinal spinal canal is formed inside the spine from top to bottom, which contains the spinal cord. When treating spinal diseases or degeneration problems, an interbody cage is often needed to support the spine. [0003] In the four-sided openable intervertebral fusion cage in the prior art, the four fusion blocks cannot be gradually spread out in a cross-shaped manner around the four sides, and the expansion range of the fusion blocks is small, and the support eff...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a four-side expandable intervertebral fusion device to solve the problem of the four-side expandable intervertebral fusion device in the prior art proposed in the above-mentioned background technology, and the four fusion blocks cannot be crossed around. Gradually expand, and then the expansion range of the fusion block is small, the support effect on the vertebral cone is poor, it is not easy to restore the height and tension of the vertebral joint, so that the spine cannot better restore the physiological curvature, and the applicable range is narrow, practical and the problem of poor flexibility

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