CN102674817B - High-tenacity dental ceramic bracket material and preparation method thereof - Google Patents
High-tenacity dental ceramic bracket material and preparation method thereof Download PDFInfo
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- CN102674817B CN102674817B CN201210176011.6A CN201210176011A CN102674817B CN 102674817 B CN102674817 B CN 102674817B CN 201210176011 A CN201210176011 A CN 201210176011A CN 102674817 B CN102674817 B CN 102674817B
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Abstract
The invention relates to a high-tenacity dental ceramic bracket material and a preparation method thereof. The high-tenacity dental ceramic bracket material is characterized by taking aluminum oxide as a main component, nanometer zirconium oxide powder as a toughening agent, nanometer yttrium oxide as a phase stabilizing agent and fatty acid as a powder surface modifying agent, and comprises the nanometer zirconium oxide powder, nanometer yttrium oxide powder, the fatty acid, magnesium oxide and the aluminum oxide. The preparation method comprises the following steps of: uniformly mixing the nanometer zirconium oxide powder, the nanometer yttrium oxide powder and the fatty acid in a ball-milling mode; and adding the magnesium oxide and the aluminum oxide, and continuously performing ball-milling mixing until the mixture is uniform. The flexural strength of a dental ceramic bracket prepared by the method is obviously improved compared with that of other common dental ceramic brackets; and the flexural strength of a common dental ceramic bracket is not more than 700MPa commonly, but the flexural strength of the dental ceramic bracket prepared by the method can reach 900MPa.
Description
Technical field
The present invention relates to mouth cavity orthodontic technical field, be specifically related to a kind of high tenacity dental polishing bracket material and preparation method.
Background technology
Bracket is device necessary in Orthodontic Treatment, clinical use have rustless steel and pottery two kinds, rustless steel aesthetic property is poor, and ceramic bracket has the translucence similar to enamel, good antipollution and the ability of fastness and be subject to the especially welcome of female patient of extensive patients.
All ceramic brackets of application are aluminium oxide ceramics at present, according to the difference of its processing technology, can be divided into signle crystal alumina pottery and polycrystalline alumina ceramic again.Between the two, the most obvious difference is the difference of optical transmission, and the light transmission of signle crystal alumina pottery is better.The two all has good antipollution and the ability of fastness.Because polycrystalline alumina ceramic processing technology is more simple, application is comparatively extensive at present.But it also has obvious shortcoming, owing to adopting integral cutting, there is cut on surface, increase frictional force can to the slip of correction steel wire, and polycrystalline alumina ceramic is more crisp, corner and tie wings frangibility.
External what produce at present ceramic bracket is mainly that the product of the ，3M company of HeTP company of 3M company of the U.S. is made by polycrystalline alumina ceramic, adopts integral cutting processing technique.Owing to adopting machine cuts processing, its groove is more coarse, has increased the frictional force between correction steel wire and bracket.In order to reduce frictional resistance, they are just at the ceramic bracket of development of metallic groove.Because the modular ratio Natural tooth Enamel of aluminium oxide ceramics is high a lot, therefore, in interlock process, enamel contacts and often causes enamel lesions with ceramic bracket.
The TP company of the U.S. adopts a kind of new technology that is different from 3M company, and what they adopted is the pottery that can cast, and its technique is exactly first mold, then by the high mould that is pressed into of ceramic powders, and sintering at high temperature, bottom surface adopts resin material.The ceramic bracket that this technique is made is more smooth than 3M, and it and adamantine cementability, owing to adopting resin material, can be improved in bottom surface, simultaneously the effectively abrasion of reduction enamel.
The domestic development of grinding that also has some units carrying out ceramic bracket, correction Ke He Tsing-Hua University of the Capital University of Medical Sciences has researched and developed a kind of injection molding ceramic bracket, stop general ceramic company and Tongji University's School of Stomatology and researched and developed a kind of interpolation nanometer zirconium oxide ceramic bracket, it is reported that their performance Yu3M company product is close.
The fracture toughness of these above-mentioned alumina ceramics holding grooves is all also very low, ceramic bracket be broken into a clinical large problem.The ability of the anti-fracture of ceramic bracket depends on kind, shape and the volume of bracket.The fracture of bracket may occur in use, also may occur in bracket process.Research shows, twisting resistance, shearing force and removal bracket power can cause different bracket fracture rates, and dissimilar bracket fracture location is different.The defect that pottery is inner and mechanical injuries are the first causes that cause bracket fracture.Therefore the toughness that increases ceramic bracket is to be badly in need of at present changing problem certainly.
Summary of the invention
Deficiency for existing ceramic bracket batching, the object of the present invention is to provide a kind of material and preparation method of ceramic bracket of high tenacity, thereby overcomes in use chipping phenomenon of conventional ceramic bracket.
For achieving the above object, the technical scheme that the present invention takes is:
One, a dental polishing bracket material, makes main component with aluminium oxide, with nano oxidized zirconium powder, makes flexibilizer, with nanometer yttrium oxide, makes phase stabiliser, with fatty acid, makes powder surface modifier; Its composition composition comprises as follows:
Nano oxidized zirconium powder 5-20 weight portion, nanometer yttrium oxide powder 2-10 weight portion, fatty acid 1-10 weight portion, magnesium oxide 0-5 weight portion, aluminium oxide 60-85 weight portion; Described fatty acid is a kind of of lauric acid, stearic acid, oleic acid.
As above-mentioned preferred version, have:
The carbon number of described fatty acid is 12-18;
Described nano zircite powder footpath is 10-100nm.；
Described nanometer yttrium oxide powder footpath is 10-50nm;
Particle diameter≤320 order of described magnesium oxide, aluminium oxide;
Two, a preparation method for high tenacity dental polishing bracket material, comprises the steps:
A, by following weight parts, take raw material, standby;
Nano oxidized zirconium powder 5-20 part, nanometer yttrium oxide powder 2-10 part, fatty acid 1-10 part, magnesium oxide 0-5 part, aluminium oxide 60-85 part;
B, first by nano oxidized zirconium powder, nanometer yttrium oxide powder and fatty acid ball milling mix homogeneously, then add magnesium oxide, aluminium oxide to continue after ball milling is mixed to evenly to take out powder body.
Preferred version as said method has:
The carbon number of described fatty acid is 12-18;
Described nano zircite powder footpath is 10-100nm;
Described nanometer yttrium oxide powder footpath is 10-50nm;
Particle diameter≤320 order of described magnesium oxide, aluminium oxide;
Described fatty acid is the wherein a kind of of lauric acid, stearic acid, oleic acid.
Three, a kind of method of utilizing high tenacity dental polishing bracket material to prepare dentistry bracket; pressure by above-mentioned high tenacity dental polishing bracket material at 2-6Mpa is pushed down in dentistry bracket mould; speed with 5～10 ℃/min under inert gas shielding is warming up to 1400 ℃-1600 ℃; insulation 2-4 hour, is chilled to room temperature with stove.
The invention has the beneficial effects as follows:
The flexural strength of the dental polishing bracket material that it is prepared obviously improves.The flexural strength of common dental polishing bracket material is generally no more than 700Mpa, and the flexural strength of dental polishing bracket material prepared by the present invention can be up to 900Mpa.
The specific embodiment
below in conjunction with specific embodiment, the present invention and filling effect thereof are further described.This specific embodiment is the restriction to its protection domain not.
Embodiment 1
One, preparation bracket material: 1) take by weight the zirconia powder of 10 parts of particle diameter 30nm, the yttrium oxide powder of 2 parts of particle diameter 10 nm, 1 part of lauric acid, 5 parts of magnesium oxide, 82 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 2Mpa, and the speed with 10 ℃/min under nitrogen protection is warming up to 1400 ℃, is incubated 2 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is 1476Mpa, and flexural strength is 793Mpa.
Embodiment 2
One, preparation bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 10nm, the yttrium oxide powder of 5 parts of particle diameter 10 nm, 5 parts of stearic acid, 2 parts of magnesium oxide, 68 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 10 ℃/min under nitrogen protection is warming up to 1500 ℃, is incubated 2 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is 1657Mpa, and flexural strength is 868Mpa.
Embodiment 3
One, preparation bracket material: 1) take by weight the zirconia powder of 5 parts of particle diameter 20nm, the yttrium oxide powder of 3 parts of particle diameter 20 nm, 2 parts of stearic acid, 1 part of magnesium oxide, 68 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 10 ℃/min under argon shield is warming up to 1600 ℃, is incubated 2 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is compressive strength 1586Mpa, and flexural strength is 813Mpa.
Embodiment 4
One, preparation bracket material: 1) take by weight the zirconia powder of 10 parts of particle diameter 30nm, the yttrium oxide powder of 2 parts of particle diameter 50 nm, 3 parts of oleic acid, 2 parts of magnesium oxide, 83 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 3Mpa, and the speed with 10 ℃/min under nitrogen protection is warming up to 1450 ℃, is incubated 4 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1523Mpa, and flexural strength is 834Mpa.
Embodiment 5
One, preparation bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 30nm, the yttrium oxide powder of 10 parts of particle diameter 10 nm, 5 parts of stearic acid, 3 parts of magnesium oxide, 62 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 6Mpa, and the speed with 10 ℃/min under argon shield is warming up to 1600 ℃, is incubated 2 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is compressive strength 1657Mpa, and flexural strength is 921Mpa.
Embodiment 6
One, preparation bracket material: 1) take by weight the zirconia powder of 15 parts of particle diameter 50nm, the yttrium oxide powder of 4 parts of particle diameter 30 nm, 5 parts of lauric acids, 2 parts of magnesium oxide, 74 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 10 ℃/min under nitrogen protection is warming up to 1550 ℃, is incubated 3 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1517Mpa, and flexural strength is 813Mpa.
Embodiment 7
One, preparation bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 100nm, the yttrium oxide powder of 5 parts of particle diameter 20 nm, 5 parts of stearic acid, 4 parts of magnesium oxide, 66 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after lauric acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 10 ℃/min under nitrogen protection is warming up to 1500 ℃, is incubated 4 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1487Mpa, and flexural strength is 768Mpa.
Embodiment 8
One, preparation bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 80nm, the yttrium oxide powder of 10 parts of particle diameter 20 nm, 5 parts of stearic acid, 65 parts of aluminium oxidies are standby; 2), first by zirconia powder, yttrium oxide powder, adds aluminium oxide to continue ball milling mix homogeneously after lauric acid ball milling mix homogeneously, take out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 5 ℃/min under argon shield is warming up to 1600 ℃, is incubated 2 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is compressive strength 1721Mpa, and flexural strength is 743Mpa.
Embodiment 9
One, preparation bracket material: 1) take by weight the zirconia powder of 10 parts of particle diameter 50nm, the yttrium oxide powder of 2 parts of particle diameter 30 nm, 2 parts of stearic acid, 1 part of magnesium oxide, 85 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after stearic acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 4Mpa, and the speed with 8 ℃/min under nitrogen protection is warming up to 1550 ℃, is incubated 4 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1786Mpa, and flexural strength is 797Mpa.
Embodiment 10
One, preparation bracket material: 1) take by weight the zirconia powder of 15 parts of particle diameter 50nm, the yttrium oxide powder of 3 parts of particle diameter 20 nm, 10 parts of stearic acid, 2 parts of magnesium oxide, 70 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after stearic acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 5Mpa, and the speed with 8 ℃/min under nitrogen protection is warming up to 1600 ℃, is incubated 4 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1736Mpa, and flexural strength is 837Mpa.
Embodiment 11
One, preparation bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 50nm, the yttrium oxide powder of 10 parts of particle diameter 20 nm, 10 parts of stearic acid, 60 parts of aluminium oxidies are standby; 2), first by zirconia powder, yttrium oxide powder, adds aluminium oxide to continue ball milling mix homogeneously after stearic acid ball milling mix homogeneously, take out powder body;
Two, prepare bracket: the made powder body of upper step is pushed down into mould at 6Mpa, and the speed with 5 ℃/min under nitrogen protection is warming up to 1600 ℃, is incubated 4 hours, cools to room temperature with the furnace.
Three, bracket strength test: through intensity detection test, the compressive strength of bracket is that compressive strength is 1725Mpa, and flexural strength is 767Mpa.
Claims (1)
1. utilize high tenacity dental polishing bracket material to prepare a method for dentistry bracket, it is characterized in that: comprise the steps:
One) prepare bracket material: 1) take by weight the zirconia powder of 20 parts of particle diameter 30nm, the yttrium oxide powder of 10 parts of particle diameter 10 nm, 5 parts of stearic acid, 3 parts of magnesium oxide, 62 parts of aluminium oxidies are standby; 2) first by zirconia powder, yttrium oxide powder, adds magnesium oxide after stearic acid ball milling mix homogeneously, and aluminium oxide continues ball milling mix homogeneously, takes out powder body;
Two) prepare bracket: the made powder body of upper step is pushed down into mould at 6MPa, and the speed with 10 ℃/min under argon shield is warming up to 1600 ℃, is incubated 2 hours, cools to room temperature with the furnace.
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| CN104058742B (en) * | 2014-06-13 | 2015-10-07 | 吉利 | ceramic bracket |
| CN104127251A (en) * | 2014-08-13 | 2014-11-05 | 马鞍山市休普技术陶瓷有限责任公司 | Ceramic bracket and production method thereof |
| CN105272323A (en) * | 2015-09-30 | 2016-01-27 | 苏州蔻美新材料有限公司 | Bracket for orthodontics and preparation method thereof |
| CN106045481A (en) * | 2016-05-27 | 2016-10-26 | 武汉理工大学 | High-purity nano aluminium oxide biological ceramic formed through starch curing and preparation method and application thereof |
| CN108158675A (en) * | 2017-11-27 | 2018-06-15 | 桐庐宏远医疗器械有限公司 | A kind of complete ceramic locking bracket and its open method and locking means |
| CN110204334B (en) * | 2019-05-29 | 2021-12-21 | 常州大学 | Special material for high-density zirconium oxide powder injection molding and preparation method thereof |
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| CN1701764A (en) * | 2005-06-01 | 2005-11-30 | 深圳市爱尔创科技有限公司 | Transparent alumina ceramics holding groove and manufacturing method thereof |
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