Dental micro crystal glass and its preparation method and use

Abstract

A microcrystal glass used for repairing tooth contains K2O (15-25%), Al2O3 (20-30 %), SiO2 (50-60%), CaO (1-6%), MgO (0.1-0.8%), Fe2O3 (0.04-0.1%) and TiO2 (0.04-0.1%), and is prepared through mixingsaid raw materials, grinding, baking, smelting, cold isostatic pressing for shaping, nucleating, crystallizing and heat treating. Its advantages are high strength, and excellent physical and chemicalproperties.

Description

technical field

[0001] The invention belongs to the technical field of stomatology, and in particular relates to a dental glass-ceramic as well as its preparation method and application. Background technique

[0002] Dental ceramics are brittle materials, which are easy to break when the restoration is in place, occlusal and accidental trauma (Hondrum So.Areview of the strength properties of dental ceramics.J Prosthet Dent, 1992, 67(6):859.). The use of internal reinforcement is one of the main methods of improving dental ceramic materials (Wang Dalin. Research on Improving the Strength of Dental Ceramics. Foreign Medical Stomatology Volume, 1995, 22(5): 276.). Natural leucite has been used by some foreign companies to improve the strength and color of dental ceramics (Holland W. Empress-material and clinical science. Ivoclar-Vivadent Report No. 10, 1994.).

[0003] The structure, performance and production process of glass-ceramics are different from traditional ceramics. ...

Examples

Embodiment 1

[0012] Embodiment 1: get 20% K by mass percentage 2 O, 25% Al 2 o 3 , 53.5% SiO 2 , 1.2% CaO, 0.1% MgO, 0.1% Fe 2 o 3 , O.1% TiO 2 Mix well, add ethanol to submerge the above mixture, ball mill for 24 hours, dry, heat up to 1680°C, cool down to room temperature, and grind again. After being made into a cylinder, it is cold isostatically pressed at 380MPa for 20 minutes, heated up to 1100°C for nucleation, then heated up to 1550°C for crystallization, and cooled to room temperature to obtain the desired pre-pressed dental glass-ceramics.

Embodiment 2

[0013] Embodiment 2: get 15.2% K by mass percentage 2 O, 21% Al 2 o 3 , 58% SiO 2 , 5% CaO, 0.7% MgO, 0.05% Fe 2 o 3 , 0.05% TiO 2 Mix well, add 75% ethanol and ball mill until the particle size of the mixture powder is below 4 microns; dry at 600°C for 5 hours; heat up to 1600°C and melt for 9 hours; cool down to room temperature, make the desired shape and cool under 400MPa pressure Isostatic pressing for 30 minutes; heating up to 1000°C for 10 hours for nucleation; then heating up to 1550°C for 10 hours for crystallization, and cooling down to room temperature to obtain the desired dental glass-ceramics.

technical field

[0001] The invention belongs to the technical field of stomatology, and in particular relates to a dental glass-ceramic as well as its preparation method and application. Background technique

[0002] Dental ceramics are brittle materials, which are easy to break when the restoration is in place, occlusal and accidental trauma (Hondrum So.Areview of the strength properties of dental ceramics.J Prosthet Dent, 1992, 67(6):859.). The use of internal reinforcement is one of the main methods of improving dental ceramic materials (Wang Dalin. Research on Improving the Strength of Dental Ceramics. Foreign Medical Stomatology Volume, 1995, 22(5): 276.). Natural leucite has been used by some foreign companies to improve the strength and color of dental ceramics (Holland W. Empress-material and clinical science. Ivoclar-Vivadent Report No. 10, 1994.).

[0003] The structure, performance and production process of glass-ceramics are different from traditional ceramics. ...

Examples

Embodiment 1

[0012] Embodiment 1: get 20% K by mass percentage 2 O, 25% Al 2 o 3 , 53.5% SiO 2 , 1.2% CaO, 0.1% MgO, 0.1% Fe 2 o 3 , O.1% TiO 2 Mix well, add ethanol to submerge the above mixture, ball mill for 24 hours, dry, heat up to 1680°C, cool down to room temperature, and grind again. After being made into a cylinder, it is cold isostatically pressed at 380MPa for 20 minutes, heated up to 1100°C for nucleation, then heated up to 1550°C for crystallization, and cooled to room temperature to obtain the desired pre-pressed dental glass-ceramics.

Embodiment 2

[0013] Embodiment 2: get 15.2% K by mass percentage 2 O, 21% Al 2 o 3 , 58% SiO 2 , 5% CaO, 0.7% MgO, 0.05% Fe 2 o 3 , 0.05% TiO 2 Mix well, add 75% ethanol and ball mill until the particle size of the mixture powder is below 4 microns; dry at 600°C for 5 hours; heat up to 1600°C and melt for 9 hours; cool down to room temperature, make the desired shape and cool under 400MPa pressure Isostatic pressing for 30 minutes; heating up to 1000°C for 10 hours for nucleation; then heating up to 1550°C for 10 hours for crystallization, and cooling down to room temperature to obtain the desired dental glass-ceramics.