Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite tri-dimensional porous bone tissue engineering stent material and its preparation method and uses

A technology of bone tissue engineering and scaffold material, applied in the field of biomedical materials, can solve the problems of destroying the degradation performance of calcium phosphorus ceramics, difficult body degradation, poor clinical operability, etc., and achieve good osseointegration and cell affinity, high Bioactivity and biocompatibility, effects of altering structure and mechanical strength

Inactive Publication Date: 2006-09-27
SOUTH CHINA UNIV OF TECH
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Tissue engineering provides an emerging approach for the repair of damaged bone tissue. Calcium phosphate ceramics represented by hydroxyapatite (HA) are widely used as bone substitute materials because of their similar chemical composition to the inorganic phase of bone. The disadvantage is that it is difficult to use in load-bearing parts due to its brittleness and low bending strength. After calcination, the crystallinity of ceramics is high and it is difficult for the body to degrade. The resulting stress shielding is very unfavorable to bone healing and shaping.
Collagen has inherent defects as a bone graft substitute: its low mechanical strength cannot better meet the strength requirements of bone repair materials, and its clinical operability is poor
At present, most calcium phosphate / collagen composites are actually mechanical mixtures of the two, which are usually made by grinding sintered HA or other ceramics and mixing them with collagen solution. Forming a tight bond, the ceramic particles can only be loosely distributed in the collagen framework, which cannot solve the problems of bioceramics
In addition, the forming process of traditional hydroxyapatite and other calcium-phosphorus ceramics usually requires high temperature and high pressure, and pressing and sintering further destroy the degradation performance of calcium-phosphorus ceramics.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite tri-dimensional porous bone tissue engineering stent material and its preparation method and uses
  • Composite tri-dimensional porous bone tissue engineering stent material and its preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of CaO-P 2 o 5 -SiO 2 System bioactive glass nanopowder

[0040] (1) Preparation of microemulsion organic template: add octylphenol-based polyoxyethylene ether (TritonX-100), co-surfactant and ammonium hydroxide aqueous solution (concentration 12.5%) or calcium nitrate aqueous solution (concentration 12.5%) in cyclohexane 0.6M), prepare the microemulsion of ammonium hydroxide solution and the microemulsion of calcium nitrate solution;

[0041] (2) Hydrolysis: adding tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) to the microemulsion of ammonium hydroxide solution, a hydrolysis reaction occurs, and the hydrolysis reaction time is 30 to 60 minutes. (TEOS): triethyl phosphate (TEP): the weight ratio of ammonium hydroxide aqueous solution is 9: 1: 50;

[0042] (3) mixing: the microemulsion of the calcium nitrate solution configured in step (1) is added in the microemulsion obtained in step (2) by volume ratio 1: 1, and stirred for 60 minute...

Embodiment 2

[0050] (1) Preparation of CaO-P 2 o 5 -SiO 2 System bioactive glass nanopowder

[0051] (1) Preparation of microemulsion organic template: add octylphenol-based polyoxyethylene ether (TritonX-100), co-surfactant and ammonium hydroxide aqueous solution (concentration 12.5%) or calcium nitrate aqueous solution (concentration 12.5%) in cyclohexane 0.6M), prepare the microemulsion of ammonium hydroxide solution and the microemulsion of calcium nitrate solution;

[0052] (2) Hydrolysis: adding tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) to the microemulsion of ammonium hydroxide solution, a hydrolysis reaction occurs, and the hydrolysis reaction time is 30 minutes. ): triethyl phosphate (TEP): the weight ratio of ammonium hydroxide aqueous solution is 13: 1: 100;

[0053] (3) mixing: the microemulsion of the calcium nitrate solution configured in step (1) is added in the microemulsion obtained in step (2) by volume ratio 1: 1, and stirred for 80 minutes to obta...

Embodiment 3

[0061] (1) Preparation of CaO-P 2 o 5 -SiO 2 System bioactive glass nanopowder

[0062] (1) Preparation of microemulsion organic template: add octylphenol-based polyoxyethylene ether (TritonX-100), co-surfactant and ammonium hydroxide aqueous solution (concentration 12.5%) or calcium nitrate aqueous solution (concentration 12.5%) in cyclohexane 0.6M), prepare the microemulsion of ammonium hydroxide solution and the microemulsion of calcium nitrate solution;

[0063] (2) Hydrolysis: adding tetraethyl orthosilicate (TEOS) and triethyl phosphate (TEP) to the microemulsion of ammonium hydroxide solution, a hydrolysis reaction occurs, and the hydrolysis reaction time is 30 to 60 minutes. (TEOS): triethyl phosphate (TEP): the weight ratio of ammonium hydroxide aqueous solution is 9: 1: 50;

[0064] (3) mixing: the microemulsion of the calcium nitrate solution configured in step (1) is added in the microemulsion obtained in step (2) by volume ratio 1: 1, and stirred for 60 minute...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Apertureaaaaaaaaaa
Diameteraaaaaaaaaa
Apertureaaaaaaaaaa
Login to View More

Abstract

The bionic composite 3D bone tissue engineering rack material has pores of 200-500 microns and porosity over 80 %, and contains bioactive nanometer CaO-P2O5-SiO2 glass powder 50-80 wt%, type-I collagen 10-35 wt%, hyaluronic acid 2-8 wt% and phosphatidylserine 2-8 wt%. Its preparation process includes mixing the above said components homogeneously, adding buffering agent and cross-linking agent for cross-linking treatment, freezing, freeze drying to dewater completely, soaking in Na2HPO4 solution, washing, dewatering and vacuum drying. The material is used as bone substituting material for repairing damaged bone tissue in medical field.

Description

technical field [0001] The invention relates to a biomedical material, in particular to a method for preparing a bionic composite three-dimensional porous bone tissue engineering scaffold material. [0002] The invention also relates to materials prepared by said method. [0003] The invention also relates to the use of said materials. Background technique [0004] Tissue engineering provides an emerging approach for the repair of damaged bone tissue. Calcium phosphate ceramics represented by hydroxyapatite (HA) are widely used as bone substitute materials because of their similar chemical composition to the inorganic phase of bone. The disadvantage is that it is difficult to use in load-bearing parts due to its brittleness and low bending strength. After calcination, the ceramics have high crystallinity and are difficult to degrade by the body. The resulting stress shielding is very unfavorable to bone healing and shaping. Therefore, currently commonly used bioceramics re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A61L27/40A61L27/56
Inventor 王迎军陈晓峰赵娜如杨春蓉
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com