CN101579261B - Zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method - Google Patents
Zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method Download PDFInfo
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- CN101579261B CN101579261B CN2009100992561A CN200910099256A CN101579261B CN 101579261 B CN101579261 B CN 101579261B CN 2009100992561 A CN2009100992561 A CN 2009100992561A CN 200910099256 A CN200910099256 A CN 200910099256A CN 101579261 B CN101579261 B CN 101579261B
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Abstract
The invention discloses a zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method; the method comprises the following steps: dipping a special provided ceramic slurry by a stack porcelainsmall brush to compost all ceramic crown inner core on a dental die surface of a clinical patient and standing the dental die; absorbing the water content on the surface of the slurry and densifying to form embryonic core, and then drying the embryonic core at a constant temperature, taking off the all ceramic crown from the dental die, and sintering the all ceramiccrown at a high temperature to prepare the ceramics substrate crown. In the invention, gel systems composed of organic monomer and crosslinker are used, high solid content and strongly plastic core b iscuit is obtained by the free radical polymerization reaction, nano-ceramic particles are used as dispersed phase to introduce micron ceramic matrix to prepare a nano-composite ceramic, and the nano-composite ceramic has good strenghing and toughing effect, high strength material and high toughness, small change of sintering volume, moreover the forming method of the invention is easy and fast tooperate, and can prepare dental ceramics substrate crown into various complicated shapes and approach net size forming.
Description
Technical field: the forming method that the present invention relates to a kind of dental polishing substrate crown.
Background technology: ceramic material is because of approaching with adamantine transparency and refractive index, the close natural teeth of appearance, and have excellent biological compatibility, make the application of ceramic bases hat in Oral Repair more and more widely.The composite ceramics of Zirconia reinforced alumina classes such as the In-Ceram Zirconia (ICZ) that uses in dentistry, LAVASystem, Precident-DCS-System, Cerec Sirona Dental System has high strength and high tenacity, but change in volume is big behind the high temperature sintering, and cost of manufacture is also higher.In order to make ceramic bases hat with preferable sintering character, supertension molding, ink-jet molding, ceramic mould-free forming, gel straight forming or the like various forming techniques are arranged now, but these method equipment needed thereby complexity, the specification requirement height is promoted undesirable in the clinical use of dentistry.
Summary of the invention: at the deficiencies in the prior art, the invention provides a kind of simple for production fast, the gel-casting method of the Zirconia reinforced alumina dental polishing substrate crown that sinter molding is effective.
Method of the present invention follows these steps to carry out:
(A) get the tooth die of clinical patients, and expect in surface coated die crack;
(B) pick ready ceramic size at tooth die surface composting all-ceramic crown kernel with heap porcelain small brushes, the step of producing of wherein preparing ceramic size is:
The organic monomer acrylamide solution of the configuration quality percent 15wt% of elder generation adds the cross-linking agent methylene-bisacrylamide again and forms premixed liquid, and wherein the mass ratio of organic monomer acrylamide and cross-linking agent methylene-bisacrylamide is 24: 1;
Micron order aluminium oxide and nanoscale zirconium oxide powder are pressed mass ratio are equipped with at 4: 1, and with micron order magnesium oxide and Nano titanium dioxide powder as the assisted sintering agent, and the assisted sintering agent is no more than 5% in above-mentioned all powder gross masses;
Above-mentioned powder is scattered in the above-mentioned premixed liquid, and adds an amount of dispersant, and utilize pH value that alkali liquor regulates premixed liquid fit value, prepare solid volume fraction and be the suspension more than 45% to dispersant;
Above-mentioned suspension fine grinding is obtained the low viscous slurry of high solid phase, add an amount of initiator and catalyst again, fully dispersed with stirring promptly makes the preparation ceramic size;
(C) the tooth die with the good all-ceramic crown kernel of surperficial composting leaves standstill, and makes surperficial slurry moisture be absorbed the fine and close young bird nuclear that forms in back;
(D) then with tooth die freeze-day with constant temperature, take off the all-ceramic crown kernel from the tooth die, high temperature sintering is promptly made the ceramic bases hat again.
The gel rubber system that the present invention has used organic monomer and cross-linking agent to form, can obtain high solids content, kernel biscuit that plasticity is strong by Raolical polymerizable, and utilize the nanometer scale ceramics granule to make nano composite ceramic as disperse phase introducing micron order ceramic matrix, have good enhancing and mend tough effect, the strength of materials and toughness height, the sintering change in volume is little, and forming method of the present invention is easy and simple to handle fast, can prepare various complex shapes, can be near the dental polishing substrate crown of dead size molding.
Further specify the present invention below by embodiment.
Embodiment: must use ceramic size when making the all-ceramic crown kernel, generally be that ceramic size is prefabricated standby, and it is as follows that slurry is produced step:
Organic monomer acrylamide (AM) solution of the configuration quality percent 15wt% of elder generation, add cross-linking agent methylene-bisacrylamide (MBAM) again and form premixed liquid, wherein the mass ratio of organic monomer acrylamide (AM) and cross-linking agent methylene-bisacrylamide (MBAM) is 24: 1;
Micron order aluminium oxide and nanoscale zirconium oxide powder are pressed mass ratio are equipped with at 4: 1, and with micron order magnesium oxide and Nano titanium dioxide powder as the assisted sintering agent, the assisted sintering agent in the present embodiment accounts for 2% of above-mentioned all powder gross masses;
Above-mentioned powder is scattered in the above-mentioned premixed liquid, and adding an amount of dispersant, present embodiment adopts SD-07, and utilizes strong aqua ammonia or sodium hydroxide to regulate the pH value to 9.5 of premixed liquid, prepare solid volume fraction and be the suspension more than 45%, it is 55% preferable generally making solid volume fraction;
With the abundant vacuum ball milling of above-mentioned suspension, perhaps other fine grinding modes, obtain the low viscous slurry of high solid phase, add an amount of initiator ammonium persulfate (APS) and catalyst tetramethylethylenediamine (TEMED) again, the use amount of initiator is the percentage by volume 4vol% of the premixed liquid of above-mentioned organic monomer and cross-linking agent formation in the present embodiment, perhaps 3vol% and 5vol% are also preferable, can certainly be adjusted into other numerical value as required, the use amount of catalyst is the percentage by volume 8vol% of initiator normally, perhaps 9vol%, 5vol% etc.;
The slurry of above-mentioned adding initiator and catalyst fully stirred and ultrasonic dispersing after, it is standby promptly to make required ceramic size.
The method of formal making dental polishing substrate crown is as follows:
(A) get the tooth die of clinical patients, and, generally adopt dental stone's die at surface coated die crack material, harder, be out of shape when avoiding composting all-ceramic crown kernel;
(B) pick ready ceramic size at tooth die surface composting all-ceramic crown kernel with heap porcelain small brushes then;
(C) the tooth die with the good all-ceramic crown kernel of surperficial composting left standstill 24 hours, made the moisture of surperficial slurry be absorbed the fine and close young bird nuclear that forms in back;
(D) then with 120 ℃ of dryings of tooth die constant temperature, take off the all-ceramic crown kernel from the tooth die, high temperature sintering is promptly made the ceramic bases hat with furnace temperature cooling taking-up again.
The strength of materials and the toughness height of the Zirconia reinforced alumina dental polishing substrate crown that obtains, the sintering change in volume is little, near the dead size molding, and easy and simple to handle fast, can prepare the substrate crown of various complex shapes.
Claims (5)
1. the gel-casting method of a Zirconia reinforced alumina dental polishing substrate crown is characterized in that following these steps to carrying out:
(A) get the tooth die of clinical patients, and expect in surface coated die crack;
(B) pick ready ceramic size at tooth die surface composting all-ceramic crown kernel with heap porcelain small brushes, the step of producing of wherein preparing ceramic size is:
The organic monomer acrylamide solution of the configuration quality percent 15wt% of elder generation adds the cross-linking agent methylene-bisacrylamide again and forms premixed liquid, and wherein the mass ratio of organic monomer acrylamide and cross-linking agent methylene-bisacrylamide is 24: 1;
Micron order aluminium oxide and nanoscale zirconium oxide powder are pressed mass ratio are equipped with at 4: 1, and with micron order magnesium oxide and Nano titanium dioxide powder as the assisted sintering agent, and the assisted sintering agent is no more than 5% in above-mentioned all powder gross masses;
Above-mentioned powder is scattered in the above-mentioned premixed liquid, and adds an amount of dispersant, and utilize pH value that alkali liquor regulates premixed liquid fit value, prepare solid volume fraction and be the suspension more than 45% to dispersant;
Above-mentioned suspension fine grinding is obtained the low viscous slurry of high solid phase, add an amount of initiator and catalyst again, fully dispersed with stirring promptly makes the preparation ceramic size;
(C) the tooth die with the good all-ceramic crown kernel of surperficial composting leaves standstill, and makes surperficial slurry moisture be absorbed the fine and close young bird nuclear that forms in back;
(D) then with tooth die freeze-day with constant temperature, take off the all-ceramic crown kernel from the tooth die, high temperature sintering is promptly made the ceramic bases hat again.
2. the gel-casting method of Zirconia reinforced alumina dental polishing substrate crown according to claim 1 is characterized by: the initiator of producing in the preparation ceramic size adopts Ammonium persulfate., and catalyst adopts tetramethylethylenediamine.
3. the gel-casting method of Zirconia reinforced alumina dental polishing substrate crown according to claim 1 is characterized by: the dispersant of producing in the preparation ceramic size adopts SD-07, and the most suitable pH value is 9.5 accordingly.
4. the gel-casting method of Zirconia reinforced alumina dental polishing substrate crown according to claim 1 is characterized by: the assisted sintering agent of producing in the preparation ceramic size accounts for 2% of all powder gross masses.
5. the gel-casting method of Zirconia reinforced alumina dental polishing substrate crown according to claim 1 is characterized by: the tooth die adopts dental stone's die.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100992561A CN101579261B (en) | 2009-05-28 | 2009-05-28 | Zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method |
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| CN2009100992561A CN101579261B (en) | 2009-05-28 | 2009-05-28 | Zirconia tenacity-increasing alumina oxide dental ceramics substrate crown gelcasting forming method |
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| CN101579261B true CN101579261B (en) | 2011-06-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151230B (en) * | 2010-02-11 | 2012-11-21 | 上海交通大学医学院附属第九人民医院 | Preparation method of gel-formed zirconium oxide full-porcelain base crown |
| CN105924164A (en) * | 2016-05-05 | 2016-09-07 | 青岛大学 | Method for preparing zirconium oxide all-ceramic crown through microwave sintering |
| CN105967686A (en) * | 2016-05-05 | 2016-09-28 | 青岛大学 | Preparation method of zirconia whole porcelain tooth |
| KR20190114849A (en) * | 2018-03-30 | 2019-10-10 | 소후 인코포레이티드 | Opaque imparting liquid for zirconia |
| CN110292450A (en) * | 2019-06-26 | 2019-10-01 | 深圳牙领科技有限公司 | A kind of wet forming production method of artificial tooth |
| CN110946665A (en) * | 2019-11-26 | 2020-04-03 | 山西金兔义齿有限公司 | Technology for repairing false tooth by 3D printing of titanium-based composite material |
| CN111704442A (en) * | 2020-06-22 | 2020-09-25 | 深圳市第二人民医院(深圳市转化医学研究院) | Preparation method of tooth bracket for orthodontic treatment and tooth bracket prepared by preparation method |
| CN114872390B (en) * | 2022-05-23 | 2023-06-13 | 哈尔滨工业大学 | Ceramic/fiber reinforced composite protective armor structure |
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