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Bone cement pedicle screw fixation and fusion system for spinal degeneration disease

A technology of pedicle screw and bone cement, which is applied in the direction of fixator, internal fixator, internal bone synthesis, etc., can solve the problems such as the backward movement of the syringe piston, the inability to accurately grasp the injection pressure and the injection volume, etc. Achieve the effect of increasing anchoring force, preventing bending and reducing clogging

Pending Publication Date: 2022-02-25
LUOYANG ORTHOPEDIC TRAUMATOLOGICAL HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a bone cement pedicle screw fixation and fusion system for spinal degeneration, to solve the problem that the anchoring force proposed in the above-mentioned background technology still has a certain space for improvement, and the injection method of the syringe cannot be accurate. Master the pressure and volume of injection. In the face of bone cement injection blockage, loosening the syringe may also cause the piston to fall back.

Method used

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  • Bone cement pedicle screw fixation and fusion system for spinal degeneration disease
  • Bone cement pedicle screw fixation and fusion system for spinal degeneration disease
  • Bone cement pedicle screw fixation and fusion system for spinal degeneration disease

Examples

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Effect test

Embodiment 1

[0041] see figure 1 with figure 2 , the present invention provides a technical solution:

[0042] A bone cement pedicle screw fixation and fusion system for spinal degeneration, comprising a hollow screw 1 with several side holes 2 at the front end, a cross angle 3 at the rear end and capable of rotating through a hollow drum, and a chute 4 And the connection head 7 sleeved on the chute 4, the inner side of the hollow screw 1 is slidably provided with the injection rod 6, and the injection rod 6 is slidably connected to the inner side of the hollow screw 1, which can be used to overcome the problem that the injection rod 6 follows the rotation of the hollow screw 1. Rotate, the front end of the injection rod 6 is provided with an injection ring 5 corresponding to the side hole 2, the injection ring 5 is used for the injection of bone cement, the inner side of the hollow screw 1 is fixedly connected with a friction ring 10, and the friction ring 10 can be maintained by frict...

Embodiment 2

[0046] see image 3 with Figure 5-7 , the present invention provides a technical solution;

[0047] The fixation and fusion system also includes an injection module, which is used to pressurize the bone cement to allow the bone cement to enter and generate diffusion, and the injection module includes an injection volume statistics module;

[0048] The injection module is used to realize the injection of bone cement. The injection module includes an injector 13 and a piston 14 sliding on the inside of the injector 13. The leftward movement of the piston 14 can generate pressure on the bone cement in the injector 13 to realize bone cement injection. injection, the right end of the piston 14 is rotated and connected with a compression screw 15. With the rotation of the compression screw 15, the compression screw 15 will drive the piston 14 to move to the left, and the outside of the compression screw 15 is spirally connected with the inside of the injector 13. 15 to make the p...

Embodiment 3

[0055] see image 3 with 4 , the present invention provides a technical solution:

[0056] The same parts as those in Embodiment 2 will not be repeated in this embodiment, the difference is that;

[0057] The fixed fusion system also includes an injection module, the injection module includes an injection pressure warning module, and the injection pressure warning module also includes a pressure threshold adjustment module;

[0058] The injection pressure warning module is used to monitor the pressure during injection, and lock the rotation of the compression screw 15 when the pressure is too high. The injection pressure warning module includes a slider 26, a second spring 27 and a stopper 22, The top of the second spring 27 is fixedly connected with the bottom end of the slide block 26. When the injection pressure is too high, the slide block 26 will be pressed and press the stopper 22 to move toward the cam 21 side through the oil pipe 20, and the movement of the cam 21 w...

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Abstract

The invention relates to a bone cement pedicle screw fixation and fusion system for the spinal degeneration disease, belonging to the technical field of bone cement pedicle screw fixation and fusion. The system comprises a hollow screw, a chute and a connector sleeving the chute, wherein an injection rod is slidably arranged on the inner side of the hollow screw, the injection rod is in sliding connection with the inner side of the hollow screw and can be used for overcoming the defect that the injection rod rotates along with rotation of the hollow screw, an injection ring corresponding to a side hole is formed in the front end of the injection rod and used for injecting bone cement, a friction ring is fixedly connected to the inner side of the hollow screw and used for friction, and the friction ring can maintain the relative stability of the position of the injection rod through the friction force. The fixation and fusion system further comprises an injection module, wherein the injection module is used for pressurizing the bone cement to enable the bone cement to enter and disperse, the injection module comprises an injection amount counting module and an injection pressure warning module, and the injection pressure warning module further comprises a pressure threshold value adjusting module.

Description

technical field [0001] The invention relates to the technical field of bone cement pedicle screw fixation and fusion, in particular to a bone cement pedicle screw fixation and fusion system for spinal degeneration. Background technique [0002] Patients with spinal degenerative diseases are often accompanied by osteoporosis. The hot and difficult issues in the field of spinal surgery are the treatment of spinal degenerative diseases accompanied by osteoporosis. For degenerative spinal diseases, the commonly used clinical treatment method is surgical treatment. However, for patients with severe osteoporosis, the effect of internal fixation is not satisfactory. Common postoperative complications include pedicle screw loosening, falling off, and fracture. Therefore, the combination of bone cement and pedicle screw treatment began to appear. [0003] Injection of bone cement into the screw canal: refers to screwing the pedicle screw into the vertebral body to form a channel, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70
CPCA61B17/7071A61B17/7098
Inventor 吴晓阳马冬苗刘晓东陈磊陈睿马虎升
Owner LUOYANG ORTHOPEDIC TRAUMATOLOGICAL HOSPITAL
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