Spinal crest elastic internal fixation device

Abstract

The invention discloses an inner elastic fixer of vertebral spinous process. The fixer comprises a U-shaped elastic strip (1) and a U-shaped clip (2) arranged at both sides of the U-shaped elastic strip. The invention is characterized in that lateral wings (3) are arranged at both sides of the bottom of the U-shaped elastic strip (1) respectively, the lateral wings (3) extend along the negative direction of a U-shaped opening and a tapping screw hole (5) is arranged on each lateral wing (3). The invention fastens a fixed bolt on the upper spinous process and the lower spinous process by the U-shaped clip and adopts the tapping screw hole to fix the lateral wing on a vertebral lamina at the root of the spinous process, thus greatly reducing force acting on the spinous process so as to improve the stability of fixing and effectively prevent the fracture and incision of the spinous process.

Description

technical field [0001] The invention relates to a spinal elastic internal fixer, which is suitable for treating stenosis and instability of lumbar spinal canal. Background technique [0002] In traditional spinal diseases, besides injuries caused by traumatic fractures, spinal degeneration is a common cause. The segmental instability of the spine caused by lumbar degeneration leads to abnormal local stress and narrowing of the spinal canal. This abnormal stress distribution and spinal canal stenosis are considered to be one of the pain-causing mechanisms of low back pain. Lumbar spinal stenosis and lumbar instability often go together, because lumbar spinal instability accelerates the narrowing of the lumbar spinal canal, and lumbar posterior decompression surgery often damages the structure of the posterior column of the lumbar spine and aggravates lumbar instability. At present, the surgical methods for the treatment of the above diseases are mainly posterior decompressio...

AI Technical Summary

Problems solved by technology

However, because the bone strength of the spinous process itself is weak, and all the forces are concentrated on the spinous process, it is prone to fracture and cutting of the spinous process

In order to avoid the above problems, the method of not fixing with bolts is often used clinically, but there are contradictions that the implant is not strong enough to fix and the implant is easy to loosen

Although the developer of the above-mentioned implant has set some small protrusions on the outer side of the U-shaped elastic sheet main body and designed the inner sides of the U-cards on both sides as a serration to its product, it is attempted to increase the Increase the bonding force between it and the spinous process to avoid loosening of the implant, but practice has proved that the above shortcomings cannot be overcome

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