A preparing method of a dental ceramic composite material

A technology of composite materials and dental ceramics, applied in the field of stomatology, can solve problems such as the weak combination of dental glass-ceramics and dental alumina ceramics, achieve excellent mechanical properties, simple production process, and repair tooth defects

Inactive Publication Date: 2016-04-06
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the present invention: the present invention provides a kind of preparation method of dental ceramic composite material in view of the problems existing in the above-mentioned existing technology, by adjusting the ratio of some raw materials of dental glass-ceramics, the coefficient of thermal expansion of dental glass-ceramics is slightly smaller than that of dental ceramics. The thermal expansion coefficient of alumina ceramics, the dental glass-ceramics of the composite material is in the micro-compressed state of dental alumina ceramics, which not only solves the technical problem that the dental glass-ceramics and dental alumina ceramics are not firmly bonded, but also prepares a white pomegranate Dental ceramic composite materials with the color and luster of stone-reinforced glass-ceramics and the strength of dental alumina ceramics, and the dental ceramic composites have better color and luster than dental glass-ceramics, and higher mechanical strength than dental alumina ceramics.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: the K that mass percent is 15.00% 2 O, 30.00% Al 2 o 3 , 48.00% SiO 2 , 6.80% CaO, 0.05% MgO, 0.05% Fe 2 o 3 , 0.10% TiO 2 Mix well, add ethanol with a volume ratio of 95% (according to the ratio of 95ml absolute ethanol plus 5ml water), ball mill for 24 hours until the particle size of the mixture powder is below 4 microns; dry at 400°C for 12 hours; heat up to 1550°C Melt for 8 hours, cool down to room temperature, and then pulverize and grind. The particle size of the ground powder is controlled below 4 microns; the powder is wrapped on the surface of microcrystalline alumina ceramics with a thickness of 0.3mm, and the wrapped sample is placed in the required mold for processing. Press and fix, and then place the pressure-fixed sample in a silica gel film and apply cold isostatic pressing under 300MPa pressure for 30 minutes to form, remove the silica gel film, heat the sample to 1200°C for 8 hours to nucleate, and then heat up to 1550°C Crystalli...

Embodiment 2

[0011] Embodiment 2: the K that mass percent is 17.30% 2 O, 20.00% Al 2 o 3 , 60.00% SiO 2 , 1.50% CaO, 1.00% MgO, 0.10% Fe 2 o 3 , 0.10% TiO 2 Mix well, add ethanol with a volume ratio of 75% (according to the ratio of 75ml absolute ethanol plus 25ml water), ball mill for 24 hours until the particle size of the mixture powder is below 4 microns; dry at 500°C for 11 hours; heat up to 1600°C Melt for 10 hours; cool down to room temperature, then pulverize and grind, the particle size of the ground powder is controlled below 4 microns; wrap the powder on the surface of microcrystalline alumina ceramics with a thickness of 2mm, put the wrapped sample in the required mold and pressurize Fix, and then place the pressure-fixed sample in a silica gel film and apply cold isostatic pressing for 25 minutes under a pressure of 500 MPa to form, remove the silica gel film, and raise the temperature of the sample to 1000 ° C for 12 hours; then raise the temperature to 1350 ° C to cryst...

Embodiment 3

[0012] Embodiment 3: the K that mass percent is 23.00% 2 O, 20.00% Al 2 o 3 , 55.00% SiO 2 , 1.50% CaO, 0.48% MgO, 0.01% Fe 2 o 3 , 0.01% TiO 2 Mix well, add ethanol with a volume ratio of 95% (according to the ratio of 95ml absolute ethanol plus 5ml water), ball mill for 24 hours, until the particle size of the mixture powder is below 4 microns; dry at 700°C for 10 hours; heat up to 1680°C Melt for 12 hours; cool down to room temperature, then pulverize and grind, the particle size of the ground powder is controlled below 4 microns; wrap the powder on the surface of microcrystalline alumina ceramics with a thickness of 3mm, and put the wrapped sample in the required mold for pressure Fix, and then place the pressure-fixed sample in a silica gel film and apply cold isostatic pressing under a pressure of 400MPa for 25 minutes to form, remove the silica gel film, and heat the sample to 1100°C for 10 hours to nucleate; then heat up to 1450°C to crystallize After heating for...

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Abstract

The invention relates to a preparing method of a dental ceramic composite material. The method includes mixing 15.00-25.00% by mass of K2O, 20.00-30.00% by mass of Al2O3, 48.00-60.00% by mass of SiO2, 1.50-7.00% by mass of CaO, 0.05-1.00% by mass of MgO, 0.01-0.10% by mass of Fe2O3 and 0.01-0.10% by mass of TiO2, adding 75-95% by mass of ethanol, grinding with the granularity of ground powder being controlled to be lower than 4 mu, drying, melting for form glass, smashing and grinding the cooled glass with the granularity of ground powder being controlled to be 4 mu or below, covering microcrystalline alumina ceramic with the ground powder with the thickness being 0.3-3 mm, pressing and performing isostatic cool pressing through a former, nucleating and performing crystallization heat treatment to obtain the dental ceramic composite material. Mechanical performances of the prepared dental ceramic composite material are better than those of leucite-enhanced dental microcrystalline glass at present, and physical and chemical performances of the prepared dental ceramic composite material are better than those of microcrystalline alumina ceramic at present, so that the dental ceramic composite material can be used as restorations for repairing tooth defects. The method is easily available in raw materials and simple in production process and has good development and application prospects.

Description

technical field [0001] The invention belongs to the technical field of stomatology, and in particular relates to a preparation method of a dental ceramic composite material. Background technique [0002] Dental ceramics are brittle materials that are prone to fracture when the restoration is in place, occlusal and accidental trauma (HondrumSo.Areviewofthestrengthpropretiesofdentalceramics.JProsthetDent,1992,67(6):859.). The use of internal reinforcement is currently one of the main methods of improving dental ceramic materials (Wang Dalin. Research on Improving the Strength of Dental Ceramics. Foreign Medical Stomatology, 1995, 22 (5): 276.) Natural leucite has been used by some foreign countries. The company is used to improve the strength and color of dental ceramics (CulpL.Empress2.Firstyearclinicalresults.JDentTechnol, 1999,16:12-15). Due to its unique physical and chemical properties, natural leucite is more suitable for the restoration and treatment of tooth defects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/85C03C10/10
CPCC03C10/0018C04B41/009C04B41/5023C04B41/85C04B35/10C04B41/4521C04B41/4545C04B41/0072
Inventor 张飚吴伯麟
Owner WUHAN UNIV
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