Internal fixation system for cervical posterior vertebral enlargement

Abstract

The invention discloses an internal fixation system for a cervical posterior vertebral enlargement. The internal fixation system comprises a fixing plate, and a fusion body, a first fixing screw and asecond fixing screw are arranged on the inner side of the fixing plate. The fusion body is arranged between the first fixing screw and the second fixing screw, and the fusion body is of a middle holestructure with openings at both ends. According to the internal fixation system for the cervical posterior vertebral enlargement, spinal cord decompression is completed, at the same time, a vertebralcanal can be reconstructed, the integrity of the vertebral canal can be restored, a cervical vertebra posterior ligamentous complex is retained, and therefore, it is particularly necessary to avoid related complications caused by existing surgical modes. The novel surgical mode can lead to a revolution in the treatment of clinical multi-segmental cervical spondylosis and benefit patients to obtain better surgical effects, so that great medical and social value are generated.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and in particular relates to a cervical posterior internal fixation system. Background technique [0002] Cervical spondylosis (Cervical spondyrlotic myelopathy, CSM) is due to various reasons (including trauma and congenital abnormalities and other factors) caused by cervical disc degenerative changes, nucleus pulposus, resulting in spinal cord compression or / and spinal cord ischemia caused spinal cord Dysfunction, a myelopathy that affects sensation, movement, and defecation in the extremities. Multilevel degenerative cervical spondylosis (Multilevel cervical degenerative myelopathy, MCDM) refers to patients with spinal cord compression in more than 3 segments on imaging, which can be manifested as intervertebral disc degeneration, herniation, vertebral body anterior or posterior bone Various pathological changes such as hypertrophy, cervical spinal canal stenosis, ossification of the p...

AI Technical Summary

Problems solved by technology

[0006] The current multi-segment posterior cervical surgery methods, whether total laminectomy (Lamineectomy, LC) or posterior open-door laminoplasty (Open-door Laminoplasty, LP), have damaged the posterior cervical spine to varying degrees. Ligament complex, clinically found that the above two surgical methods have some surgical-related late complications, such as kyphosis (2-4%), segmental instability (14-47%), axial symptoms (30 -80%), C5 nerve root paralysis (25%-28.6%), seriously affecting the patient's neurological recovery and quality of life

[0007] These operations all require partial or complete resection of the cervical spinous process and the attached spines and interspinous ligaments, thus destroying the function of the posterior cervical ligament complex, and postoperative patients are prone to cervical reflexion, swan-neck deformity, Cervical instability, even delayed spinal nerve compression

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