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Preparation method for dental lithium silicate microcrystalline glass

A technology of glass-ceramics and lithium disilicate, applied in dental preparations, dentistry, dental prosthesis, etc., can solve the problems of no commercial products, and achieve the effect of low block strength and good processability

Active Publication Date: 2015-09-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic research on lithium silicate glass-ceramics is relatively late. Although some research institutes have proposed related invention patents, they are still in their infancy and no commercial products have appeared.

Method used

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  • Preparation method for dental lithium silicate microcrystalline glass
  • Preparation method for dental lithium silicate microcrystalline glass
  • Preparation method for dental lithium silicate microcrystalline glass

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with specific embodiments.

[0024] In the first stage, according to the formula ingredients in Table 1, LiO 2 、K 2 O is introduced in the form of carbonate, P 2 o 5 Take NH 4 h 2 PO 5 The raw material grade is analytically pure, the ingredients are mixed by ball milling, the ball milling medium is absolute ethanol, and the mass ratio of balls, materials, and medium is 2:1:1. The ball-milled mixture is passed through a 300-mesh sieve, put into an alumina crucible, and pre-fired in an air furnace to fully decompose the carbonate in the raw material; melt the completely decomposed mixture in a resistance furnace, and then add The temperature clarifies the glass liquid (the glass liquid can be mechanically stirred during the clarification process), and the clarified glass liquid is quickly poured into a stainless steel bucket filled with water and water-quenched to obtain a transparent gla...

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Abstract

The invention discloses a preparation method for dental lithium silicate microcrystalline glass. Glass powder is subjected to hot-pressing sintering, and after a compact lithium metasilicate microcrystalline glass body is formed, lithium metasilicate (Li2SiO3) crystals are converted into lithium disilicate (Li2Si2O5) crystals through heat treatment. The interior of the microcrystalline glass is uniform rod-shaped lithium disilicate (Li2Si2O5) crystals and has a rod-shaped interlock structure. Color matching agents can be intruduced in the hot-pressing sintering phase of the microcrystalline glass material, the obtained lithium metasilicate microcrystalline glass material has good processability, and unification of the manufacturability, mechanical properties and aesthetic functions of the obtained material is achieved. The technology is simple, the processability is strong, performances are stable, and the microcrystalline glass is suitable structure function integrated material.

Description

technical field [0001] The invention relates to a method for preparing glass-ceramic, in particular to a method for preparing glass-ceramic for dental use. Background technique [0002] As an important tooth restoration material, lithium disilicate glass-ceramics not only has good mechanical properties, biocompatibility, stability, etc., but also has excellent semi-permeability, which can simulate the fluorescence effect of natural teeth, and has other advantages. The incomparable biocompatibility and aesthetic performance of the material can meet the basic medical requirements for dental restoration materials. With the development of the times, people pay more and more attention to the safety performance and aesthetic performance of dental restorations. Dental restoration materials should not only have better mechanical properties to prepare components such as posterior single crowns and triple fixed bridges, but also be able to simulate the luster of natural teeth and mee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/04A61K6/027
Inventor 杨建锋张亚明张辉郭海霞曾德军吴桐王波
Owner XI AN JIAOTONG UNIV
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