Bone grafting block fixing device used for posterior atlantoarial fusion after arcus posterior atlantis excision

Abstract

The invention discloses a bone grafting block fixing device used for posterior atlantoarial fusion after arcus posterior atlantis excision. The bone grafting block fixing device comprises a metal plate, wherein the metal plate is provided with a lateral extension part and a longitudinal extension part; the lateral extension part is forwards bent from a junction of the lateral extension part and the longitudinal extension part; the lateral extension part is forwards bent to be of a circular shape; and in the longitudinal extension part, along the length direction of the longitudinal extension part, from the lateral extension part, a bone grafting block fixing area and an arcus posterior atlantis positioning hook formed by bending to the rear side arc shape of the bone grafting block fixingarea are arranged in sequence. The bone grafting block fixing device used for the posterior atlantoarial fusion after the arcus posterior atlantis excision is simple and easily used. The length and the angle of each part of the bone grafting block fixing device are adaptive to a human body cervical vertebra dissection characteristic and a bone grafting block space, so that attaching properties aregood, the bone grafting block fixing device is suitable for a special situation of a limited bone grafting bed area after the arcus posterior atlantis is partially cut off, the stability of the bonegrafting block is greatly improved, and a bone grafting success rate is improve.

Description

technical field [0001] The invention relates to articles for human life, in particular to a medical device, in particular to a bone graft block fixation device for posterior fusion of atlantoaxial vertebrae after resection of the posterior arch of the atlas. Background technique [0002] Injuries, deformities, tumors, and inflammations can damage the ligaments or bony structures of the atlantoaxial spine, resulting in instability or dislocation of the atlantoaxial spine, especially for the narrow posterior arch and cervical spinal canal stenosis caused by the developmental deformity of the atlas. Compression of the spinal cord necessitates removal of the posterior arch to achieve adequate decompression. The existing treatment method is posterior atlantoaxial bone graft fusion, but the atlas itself is small, and the posterior arch is the only commonly used bone graft bed. At present, the commonly used alternative method is to do occipital-cervical fusion. However, although t...

AI Technical Summary

Problems solved by technology

Even for patients with a complete posterior arch, due to the lack of a unified fixation device for bone graft fixation, methods such as nail bar clamping, steel wire binding, and single screw fixation will lead to insufficient local stability of the bone graft and unreliability. It is easy to be absorbed, the failure rate of bone graft is high, and the stability is poor. Moreover, due to the small area after atlas haremectomy, it is difficult to place screws, so the fixation device cannot fit closely with the posterior arch of the atlas, and cannot fundamentally realize the posterior cervical spine. Physiological remodeling of columns

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