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Cervical anterior fixation system and manufacturing method thereof

A fixation system and anterior cervical spine technology, applied in the field of medical fixation systems and their preparation, can solve the problems of increasing the difficulty and time of surgery for doctors, prolonging the recovery period, non-degradable titanium alloy materials, etc., and eliminating the need for nut fixation and adjustment time. , Reduce the stress shielding effect, and achieve the effect of high-strength fixation

Inactive Publication Date: 2015-09-30
SHANGHAI MICROPORT ORTHOPEDICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention has the following problems: single structure design, nail foot structure, non-degradable titanium alloy material, strong foreign body feeling
The disadvantages of this type of bone plate are: firstly, when there are many bone fragments or fracture lines at the fracture site, the amount of bone plate or bone screw used will be greatly increased; secondly, the magnesium alloy has low strength and cannot be directly fixed. When screwing into the bone, it is necessary to use hard bone nails such as stainless steel to tap the hole first, which increases the difficulty and time of the operation for the doctor; finally, screwing in the bone screw is another damage to the bone, which increases the original trauma area and prolongs the operation time. Increased recovery cycle and increased patient suffering
[0007] The above patents involving magnesium alloys mainly involve raw materials, surface treatment, and some cages, screws, etc., and none of them are specifically aimed at the anterior cervical fixation system, especially the technical points such as the integrated pressurized structure.

Method used

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  • Cervical anterior fixation system and manufacturing method thereof
  • Cervical anterior fixation system and manufacturing method thereof
  • Cervical anterior fixation system and manufacturing method thereof

Examples

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preparation example Construction

[0071] Please continue to see Figure 17 , the preparation method of cervical anterior approach internal fixation system provided by the present invention comprises the following steps:

[0072] Step S1: Integral processing of high-purity magnesium or magnesium alloy to form the fixed foot 1 and the fixed foot connecting rod 2; integrally process the fixed foot 1 and the fixed foot connecting rod 2 on the slow-moving wire cutting processing equipment, and the cut and formed The fixed foot 1 and the fixed foot connecting rod 2 are ground, polished and cleaned.

[0073] Step S2: place and soak the fixed foot 1 and the fixed foot connecting rod 2 after machining and surface cleaning in a mixed solution containing silicon salt; the mixed solution containing silicon salt is Na 2 SiO 3 9H 2 O, Na 3 PO 4 12H 2 Mixture of O and NaF, Na 2 SiO 3 9H 2 O, Na 3 PO 4 12H 2 O, KF and (CH 3 COO) 2 Ca·H 2 Mixture of O or K 2 SiO 3 9H 2 O, K 3 PO 4 12H 2 A mixture of O and ...

Embodiment 1

[0077] Three-dimensional software was used to design the shape and structure of the above-mentioned integrated anterior cervical internal fixation system, and the MB2 magnesium alloy material was used to process it on the wire cutting processing equipment, and then it was ground, polished, and cleaned for later use. at specific 14g / l Na 2 SiO 3 9H 2 O, 1g / l Na 3 PO 412H 2 O, 0.5g / l NaF mixed solution, use plasma oxidation equipment to treat at 470V for 5 minutes, and prepare a silicon-containing coating with a thickness of 15 microns.

Embodiment 2

[0079] Three-dimensional software is used to design the external structure of the above-mentioned integrated anterior cervical internal fixation system, and the pure magnesium material is used to process it on the slow-moving wire-cutting processing equipment, and then it is ground, polished, and cleaned for later use. at specific 12g / l Na 2 SiO 3 9H 2 O, 0.5g / l Na 3 PO 4 12H 2 O, 0.5g / l KF, 11g / l (CH 3 COO) 2 Ca·H 2 O mixed solution was treated with plasma oxidation equipment at a voltage of 450V for 6 minutes to prepare a silicon-containing coating with a thickness of 10 microns.

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Abstract

An internal fixation system for the anterior cervical vertebrae and a preparation method therefor. The system comprises a pair of fixing legs (1) arranged oppositely; the ends of the pair of fixing legs (1) are connected by a legs connection rod (2); the other ends of the fixing legs (1) are conical; saw-tooth barbs (5) are arranged on the inside surface of each fixing foot (1); saw-tooth ridges (6) are arranged on two sides of each saw-tooth barb; the middle of the legs connection rod (2) is pierced to form an observation window (3). While the system exerts a distraction force to the two sides of the middle of the observation window (3) of the legs connection rod (2), the two fixing legs (1) continuously press inwards, thus achieving the effect of pressing and fixing a single segment of cervical spine; the system accords with the physiological structural features of the cervical spine, has good conformability, fastens effectively, is simple in structure and easy to put in place and adjust. The preparation method uses single-piece shaping and a degradable magnesium and magnesium alloy matched bioactivity coating, so that the degrading speed of the magnesium and magnesium alloy can be effectively controlled, and injury caused by separation of a screw from a steel plate or removal in a second operation is fully avoided.

Description

technical field [0001] The invention relates to a medical fixation system and a preparation method thereof, in particular to an anterior cervical internal fixation system and a preparation method thereof. Background technique [0002] Since Robinson in 1955 and Cloward et al. first introduced the anterior cervical fusion surgery in 1961, the surgical method of anterior cervical plate and screw internal fixation has been widely accepted, especially in the clinical treatment of traumatic fractures, dislocations and degenerative cervical vertebral fractures. Cervical diseases and other aspects have been widely used. Anterior plate and screw internal fixation after discectomy and bone graft can significantly enhance the stability of the cervical spine and bone graft, reduce pathological activities that can lead to the formation of pseudarthrosis, prevent the loss of intervertebral height and promote bone graft fusion, and patients can recover early Get out of bed to reduce post...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70
CPCA61B17/7059A61B17/0642A61B2017/00004A61B2017/00526
Inventor 耿芳张隽季向茹
Owner SHANGHAI MICROPORT ORTHOPEDICS
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