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

Cutable bioactive devitrified glass and its prepn

A glass-ceramic, bioactive technology, applied in dentures and other directions, can solve the problems of unsatisfactory strength, bioactivity and mechanical processing performance, and achieve the effect of good biocompatibility

Inactive Publication Date: 2002-05-22
TSINGHUA UNIV
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In 1983 and 1987, the German patent DE 330664A and the Chinese patent CN 1035999A respectively reported in Na 2 O-K 2 O-CaO-MgO-Al 2 o 3 -SiO 2 -P 2 o 5 In the -F system, a biological glass-ceramic with apatite and fluorophlogopite as the main crystal phase is obtained, but the material is not ideal in terms of strength, biological activity and mechanical processing performance, which limits the application of this material

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] will contain 45% SiO 2 , 10%Al 2 o 3 , 5% MgO, 6% K 2 O, 8% MgF 2 , 6%P 2 o 5 , 15% CaO, 5% ZrO 2 The chemical analysis of pure raw materials is mixed evenly, put into an alumina crucible, and melted at 1460°C for 3 hours, and the molten glass liquid is cast into a tooth mold to form a blank, cooled to room temperature, and then heated to 600°C for nucleation After 1 hour, crystallize at 950° C. for 3 hours to obtain a glass-ceramic artificial tooth with an ivory white color and good gloss.

Embodiment 2

[0026] will contain 35% SiO 2 , 8%Al 2 o 3 , 7% MgO, 4% K 2 O, 15% MgF 2 , 5%P 2 o 5 , 18% CaO, 8% ZrO 2 The chemical analysis of pure raw materials is mixed evenly, put into an alumina crucible, melted at 1500°C for 3 hours, cast the molten glass liquid into a bone mold to form a blank, cool to room temperature, and then heat up to 650°C for nucleation 1 hour, crystallization at 850° C. for 4 hours, and finally finish processing the above-mentioned heat-treated blank to obtain a glass-ceramic artificial bone with a smooth surface and a three-point bending strength of 191 MPa.

Embodiment 3

[0028] will contain 28% SiO 2 , 5%Al 2 o 3 , 15% MgO, 3% K 2 O, 6% MgF 2 , 8%P 2 o 5 , 20% CaO, 15% ZrO 2 The chemical analysis of pure raw materials is mixed evenly, put into an alumina crucible, melted at 1460°C for 3 hours, cast the molten glass liquid into a bone mold to form a blank, cool to room temperature, and then heat up to 550°C for nucleation 1 hour, crystallization at 750° C. for 4 hours, and finally finishing the rough body after the above heat treatment to obtain a glass-ceramic artificial bone with a smooth surface and a three-point bending strength of 198 MPa.

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
Three-point bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a machinable bio-active nucleated glass and its preparation method. Said preparation method includes the following steps: firstly, uniformly mixing raw materials according toa certain proportion, melting them at 1400-1550 deg.C for 2-4 hr., pouring the molten glass liquor into mould and forming to make blank, cooling to room temp., heating and heat-insulating to make glass nucleate, continuously heating and heat-insulating to make gas crystallize to obtain biological nucleated glass using apatite and fluorophlogopite as main crystal phase. Said product also contains a certain reinforced phase formed fronm leucite and wollastonite, and possesses good biological compatibility, machinability and beautifulness.

Description

technical background [0001] The invention relates to a cuttable bioactive glass-ceramic and a preparation method thereof, belonging to the technical field of glass ceramics. Background technique [0002] Biomaterials are a class of materials that can repair, replace and regenerate body tissues and have special functions. (biologically active or biologically inert), but also have good machinability (including machinability, etc.). More than 70% of human bones and teeth are composed of apatite, and the rest are composed of collagen, so if the glass ceramic contains fluorapatite phase, it will have good biocompatibility; if it contains a layered structure Fluorphlogopite phase, then it will have good machinability. [0003] In 1983 and 1987, the German patent DE 330664A and the Chinese patent CN 1035999A respectively reported in Na 2 O-K 2 O-CaO-MgO-Al 2 o 3 -SiO 2 -P 2 o 5 In the -F system, a biological glass-ceramic with apatite and fluorophlogopite as the main cryst...

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): A61C13/083C03B32/02C03C10/04C03C10/08C03C10/10
CPCC03C3/112C03C3/062
Inventor 梁开明俞冰胡安民
Owner TSINGHUA UNIV
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