Anterior zero-incisura fixed combined type movable artificial cervical vertebra body and using method

Abstract

The invention discloses an anterior zero-incisura fixed combined type movable artificial cervical vertebra body and a using method thereof. The anterior zero-incisura fixed combined type movable artificial cervical vertebra body comprises an upper-end connecting body, a lower-end connecting body and a middle assembly, and the upper-end connecting body and the lower-end connecting body are both connected with the middle assembly through ball joint joints. According to the artificial vertebral body and the using method, after subtotal resection of the anterior cervical vertebral body and anterior cervical discectomy and fusion (ACDF) of OPLL (ossification of posterior longitudinal ligament) resection, the height of the cervical vertebra can be recovered, the cervical vertebra capable of partially moving can be reconstructed, activity of the cervical vertebra can be partially recovered, and adjacent vertebral degeneration is reduced. The invention aims to solve the problems of serious trauma, unsatisfactory decompression effect, and easy occurrence of complications such as adjacent vertebral degeneration, difficult swallowing, axial symptoms and the like in the existing long-segment cervical vertebra surgical operation, and provides a better internal fixation material and technical support.

Description

technical field [0001] The invention belongs to the technical field of cervical vertebra reconstruction in cervical vertebra surgery. More specifically, the present invention relates to an anterior zero-profile fixation combined type movable artificial cervical vertebral body and its use method. Background technique [0002] Long-segment cervical ossification of the posterior longitudinal ligament <OPLL> and multi-segment cervical disc herniation (more than 2 segments) is a common disease in the elderly, which can lead to cervical spinal canal stenosis, spinal cord and nerve root compression, and secondary upper limb Numbness and pain, decreased muscle strength, or unsteady walking of the lower limbs, which can lead to paralysis in severe cases, is a disease that seriously affects work and life. [0003] Long-segment cervical ossification of the posterior longitudinal ligament <OPLL> and multi-segment cervical intervertebral disc herniation, if non-surgical trea...

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Problems solved by technology

[0015] 2. The anterior plate occupies a certain space in front of the cervical spine, and postoperative complications of dysphagia are prone to occur. According to Wang Shaobo et al. "Analysis of the causes of dysphagia after anterior cervical surgery" -- "Chinese Journal of Spinal Cord, Volume 16, Issue 12, 2006 : 913-916" and Chen Zhi, Huang Xuan, Li Fengning et al. "Analysis of related factors of dysphagia after anterior cervical surgery" -- "Chinese Journal of Spinal Cord 2012..22: 979-983" shows that traditional anterior The incidence of dysphagia after metal plate fixation was 19..2%-28.7%;

[0017] 3. It is difficult to decompress and fix the segments above the neck 2

[0026] 3. After long-segment decompression, due to the preservation of the range of motion of the cervical spine, the incidence of adjacent vertebral degeneration is low

[0028] 1. The calcified posterior longitudinal ligament in the front cannot be removed, the spinal cord is still in a state of drifting backward after surgery, and the tension of the nerve roots is difficult to relieve, so it cannot be directly decompressed, which belongs to indirect decompression;

[0029] 2. The height of the intervertebral space cannot be restored, and the stenosis of the nerve root canal is difficult to relieve;

[0030] 3. The reversed cervical curvature is usually difficult to correct, the reversed cervical curvature is greater than 10 degrees, the thickness of the OPLL is greater than 5mm, and it is not suitable for those who press against the spinal cord;

[0031] 4. The traditional posterior median approach is traumatic, and the posterior part of the muscle is denervated and atrophied, prone to "axial symptoms" and long-term neck pain

[0032] 5. Each cervical vertebra uses 1 to 2 cervical lamina support metal plates, multi-segment surgery, internal fixation materials are expensive, and medical expenses are high

[0038] 1. It can only be decompressed indirectly, and the calcified posterior longitudinal ligament cannot be removed for direct decompression. After the operation, the spinal cord is still in a state of drifting backwards, and the tension of the nerve roots is difficult to relieve;

[0039] 2. The range of motion of the cervical spine decreases after surgery, which accelerates the degeneration of adjacent vertebrae;

[0040] 3. The traditional posteromedian approach has a large trauma, and the posterior part of the muscle is denervated and atrophied after operation, which is prone to "axial symptoms" and long-term neck pain.

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