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Inter vertebral fusing device

A fusion device and intervertebral technology, applied in the direction of internal bone synthesis, medical science, internal fixator, etc., can solve the problems of slowness, short half-life, unsatisfactory effect, etc., to prevent displacement, improve related symptoms, design reasonable effect

Inactive Publication Date: 2005-07-20
宋跃明 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Factors such as BMP and bFGF have a short half-life in vivo, and the effect of systemic or local application is not satisfactory, so it is necessary to study the sustained release system of the factor to make it work continuously and slowly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: The poly DL-lactic acid material (molecular weight: 400,000) is molded by an injection machine at an injection temperature of 200-250° C. to make an intervertebral fusion device. The cross-section of the hollow cylinder is quadrangular, and the side wall is perforated (diameter 2mm). The finished product is tested and has a pressure resistance of 930 kg.

Embodiment 2

[0027] Example 2: The L-polylactic acid material (molecular weight: 400,000) is molded into an intervertebral fusion device through an injection machine. The injection temperature is 220-225°C. The cross-section of the hollow cylinder is quadrangular, and the side wall is open. (diameter is 2mm), the finished product has been tested, and the pressure resistance is 975 kg.

Embodiment 3

[0028] Example 3: DL-lactic acid and L-lactic acid (30:70, molecular weight: 500,000) copolymer material were molded into an intervertebral fusion device through an injection machine, and the injection temperature was 175-180°C. The cross-section of the hollow cylinder is quadrangular, and the side wall is perforated (diameter 2mm). The finished product is tested to withstand a pressure of 980 kg.

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Abstract

The present invention discloses a cervical synostosis device for front enter operation of cervical vertebrae. Said device is formed from upper and lower two arms, screws and a hollow column body and is prepared by using absorbable material of poly-DL-lactic acid, poly-L-lactic acid and polyglycollic acid or copolymer of them, biological ceramics or composite of hydroxyapatite and the above-mentioned polymer. The side wal of said column body can have or have not open pore, its upper surface is made into the risen form, and its upper and lower surface can have or have not pointed tooth, and its cross-section is polygonal or circular. Said invention also provides its advantages and application range.

Description

technical field [0001] The invention belongs to the field of medical materials, and relates to a medical surgical instrument implanted in the body, which is prepared by absorbable or metal materials. The device is an intervertebral body fusion device mainly suitable for treating cervical trauma, tumors, cervical spondylosis and other diseases through anterior cervical surgery. Using ultra-high-strength absorbable materials or metal materials, it is also suitable for thoracic and lumbar operations. Background technique [0002] Anterior cervical decompression and fusion (ACDF) can effectively remove the intervertebral disc protruding to the front of the spinal canal, hypertrophic osteophytes, and fracture fragments, and can also perform intervertebral bone graft fusion at the same time. It is widely used in the treatment of cervical trauma, tumors, cervical spondylosis and other diseases. The selection of fusion materials and fusion methods plays an important role in improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70A61F2/44A61L27/00
Inventor 宋跃明段宏林代平
Owner 宋跃明
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