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Anterior cervical pedicle screw plate fixing system

A technology of pedicle screw and cervical spine anterior approach, which is applied in the direction of fixator, internal fixator, outer plate, etc. It can solve the problems of loose internal fixation, difficulty in resisting cervical rotation force, and poor anti-rotation ability, so as to avoid axial pain effect

Inactive Publication Date: 2016-01-13
徐兆万
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defects of the above two kinds of internal fixation, a few experts at home and abroad have reported the clinical application and biomechanical research of the anterior internal fixation system, but the main disadvantages are as follows: 1. Only anterior column fixation, that is, osteosynthesis The screw only protrudes into the vertebral body, and its stability is poor; 2. The anti-rotation ability is poor. In the past, the anterior pedicle fixation system was monocular and single-screw fixation, which was difficult to resist the rotational force of the cervical spine, and the internal fixation was prone to loosening

Method used

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  • Anterior cervical pedicle screw plate fixing system
  • Anterior cervical pedicle screw plate fixing system
  • Anterior cervical pedicle screw plate fixing system

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Embodiment Construction

[0021] Such as figure 1 As shown, in the prior art, when performing anterior cervical internal fixation surgery, the upper and lower vertebrae are connected through the bone plate 30, and the bone plate 30 is connected with a connecting screw 40 that passes through the bone plate and penetrates into the vertebral body. The vertebral body contains cortical bone and cancellous bone, that is to say, the connecting screw 40 can only penetrate into the cortical bone near the front side (region R in the figure), and the penetrating end of the connecting screw 40 cannot be infinitely close to the spinal canal 50. That is, the cortical bone close to the vertebral canal 50 on the vertebral body cannot be approached. When the patient is osteoporotic, the above-mentioned four connecting screws 40 are likely to fall off at this time, and the screw back and even the bone plate 30 are open. , thus making it difficult for patients to swallow after surgery, and greatly prolonging the recovery...

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Abstract

The invention discloses an anterior cervical pedicle screw plate fixing system which comprises an arc fixing plate and bone screws. The fixing plate is provided with four screw through holes, and the surface of an inner wall section, close to the inner surface of the fixing plate, of each screw through hole is a spherical surface. Each bone screw comprises a screw head and a self-tapping connection section, each screw head is provided with a round spherical surface, each upper screw through hole and the corresponding lower screw through hole are in inclined arrangement and positioned on the same side of a longitudinal center line of the fixing plate, and the two upper screw through holes and the two lower screw through holes are in vertically staggered arrangement. The anterior cervical pedicle screw plate fixing system has the advantages that the bone screws are enabled to enter by an optimal angle, the fixing plate can be firmly connected onto vertebrae to function in supporting and fixing, and effectiveness in avoidance of postoperative axial pain, high rotation resistance and benefits for rapid recovery of patients are realized.

Description

technical field [0001] The invention relates to an anterior cervical pedicle screw-plate fixation system. Background technique [0002] Anterior or posterior internal fixation of the cervical spine is a commonly used surgical method for cervical trauma, degeneration, inflammation, tumors and other diseases, but both methods have advantages and disadvantages: the anterior internal fixation is less invasive, does not damage the paraspinal muscles, and can be recovered after surgery. Faster; but its stability is worse than posterior fixation, especially for patients with three-column cervical spine injury, multi-level cervical discectomy or multi-level corpectomy. [0003] In order to overcome the defects of the above two kinds of internal fixation, a few experts at home and abroad have reported the clinical application and biomechanical research of the anterior internal fixation system, but the main disadvantages are as follows: 1. Only anterior column fixation, that is, osteo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61B17/86A61B17/80
CPCA61B17/7059A61B17/70A61B17/7044A61B17/80A61B17/8052A61B17/86
Inventor 徐兆万伦登兴徐嘉炜刘大勇庄青山
Owner 徐兆万
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