Method for preparing dental restoration material lithium disilicate glass ceramic by means of adhesive

The invention discloses a method for preparing a dental restoration material lithium disilicate glass ceramic by means of an adhesive.The method comprises the following steps that SiO2, Li2O, Al2O3, K2O, ZrO2 and P2O5 are weighed according to proportions and put in a ball grinding mill to be evenly mixed, the mixed materials are melted at high temperature, quenched and ball-milled, and substrate glass fine powder is obtained; water and polyvinyl alcohol are weighed according to the mass ratio of 100:(3-8) and poured into a beaker, heating stirring is conducted till polyvinyl alcohol is completely dissolved, and a PVA aqueous solution is obtained and sealed for use; the substrate glass fine powder is added to the PVA aqueous solution in proportion, the materials are mixed to be uniform and put in a circular mold, pressure maintaining is conducted for 1-10 min under the pressure of 20-40 MPa, and then the product is taken out and put into a high temperature furnace for sintering.According to the method for preparing the dental restoration material lithium disilicate glass ceramic by means of the adhesive, organic polymer polyvinyl alcohol with the adhesive property is used in the pressurizing molding process, and therefore the glass ceramic which is smooth in appearance, compact in internal structure and capable of reaching the expected thickness is obtained.