Dental ceramic article, process for production and use thereof
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-035/48
C04B-035/49
C09K-003/00
A61K-006/00
A61K-006/02
C04B-035/486
A61C-013/00
출원번호
US-0131428
(2009-10-26)
등록번호
US-8841223
(2014-09-23)
우선권정보
EP-08170071 (2008-11-27)
국제출원번호
PCT/US2009/062029
(2009-10-26)
§371/§102 date
20110526
(20110526)
국제공개번호
WO2010/062541
(2010-06-03)
발명자
/ 주소
Jahns, Michael
Schechner, Gallus
출원인 / 주소
3M Innovative Properties Company
대리인 / 주소
Han, Qiang
인용정보
피인용 횟수 :
1인용 특허 :
7
초록▼
The invention describes a dental article comprising zirconium oxide and at least two different coloring substances A and B, substance A showing a light emission in the range of about 470 nm to about 510 nm and substance B showing a light absorption in the range from about 520 nm to about 750 nm. The
The invention describes a dental article comprising zirconium oxide and at least two different coloring substances A and B, substance A showing a light emission in the range of about 470 nm to about 510 nm and substance B showing a light absorption in the range from about 520 nm to about 750 nm. The invention also relates to different processes of producing the dental article e.g. by a process comprising a casting step, a pressing step, or an infiltration step and to the use of certain compositions containing either substance A or substance B for producing such a dental article.
대표청구항▼
1. A dental ceramic article comprising, a dental support structure, wherein the dental support structure comprises zirconium oxide and at least two different coloring substances A and B, substance A showing a light emission in the range from about 470 nm to about 510 nm and substance B showing a lig
1. A dental ceramic article comprising, a dental support structure, wherein the dental support structure comprises zirconium oxide and at least two different coloring substances A and B, substance A showing a light emission in the range from about 470 nm to about 510 nm and substance B showing a light absorption in the range from about 520 nm to about 750 nm, wherein the dental support structure does not comprise a glass or glass ceramic material in an amount above about 10 wt.-% and wherein substance A is from about 3 wt.-% to about 7.5 wt.-%. 2. The dental ceramic article according to claim 1, substance A being selected from components comprising dysprosium. 3. The dental ceramic article according to claim 1, substance B being selected from components comprising neodymium. 4. The dental ceramic article according to claim 1, substance A being present in an amount in the range of about 0.1 to about 5 mol-% and substance B being present in an amount in the range of about 0.01 to about 1 mol-%, wherein the amounts of the substances are calculated as molar amounts of the cations. 5. The dental ceramic article according to claim 1 being characterized by at least one of the following features: breaking resistance: at least about 400 MPa,density: from about 5.9 to about 6.1 g/cm3, andlight emission in the region of about 470 nm to about 510 nm. 6. The dental ceramic article according to claim 1 comprising: ZrO2: from about 80 wt.-% to about 99 wt.-%,Y2O3: from about 0.5 wt.-% to about 10 wt.-%,Dy2O3: from about 2 wt.-% to about 7.5 wt.-%,Nd2O3: from about 0.014 wt.-% to about 1.4 wt.-%, andAdditives: from about 0.0001 wt.-% to about 1 wt.-%. 7. The dental ceramic article according to claim 1 fixed in or to a holding device. 8. A process of producing the dental ceramic article according to claim 1, the process comprising the steps of a) providing a composition comprising zirconium oxide, a liquid, substance A, substance B and optionally a binder,b) casting the composition in a mould to obtain a 3-dimensional article,c) pre-sintering the 3-dimensional article to obtain a pre-sintered article,d) machining the 3-dimensional article obtained in step b) or the pre-sintered article obtained in step c), and firing the article from step b), step c) or step d). 9. A process of producing the dental ceramic article according to claim 1, the process comprising the steps of a) providing a composition comprising zirconium oxide, substance A and substance B,b) applying pressure and/or temperature to the composition to obtain a 3-dimensional article,c) optionally machining the 3-dimensional article, and optionally firing the 3-dimensional article from step b) or step c). 10. A process of producing the dental ceramic article according to claim 1, the process comprising the steps of a) providing a dental article comprising zirconium oxide,b) optionally machining the dental article of step a),c) applying a composition containing substance B and substance A to the dental article, andd) optionally firing the dental article. 11. A process of producing the dental ceramic article according to claim 1, the process comprising the steps of a) providing a composition comprising zirconium oxide and substance A or substance B,b) applying pressure and/or temperature to the composition to obtain a 3-dimensional article,c) optionally machining the 3-dimensional article,d) applying a composition containing a substance which has not been used in step a), the substance being selected from substance B or substance A, to the article obtained in step b) or step c), ande) optionally firing the article from step d). 12. A method of producing a dental restoration or a part thereof, the method comprising providing the dental ceramic article according to claim 1; andmachining the dental ceramic article. 13. A process for producing a dental ceramic article as described in claim 1, the process comprising applying to the dental ceramic article a composition comprising a solvent in an amount of about 20 to about 99 wt.-%,substance A and substance B, andoptionally additives in an amount of about 0.1 wt.-% to about 10 wt.-%, wherein substance A is present in an amount of about 3 wt.-% to about 7.5 wt.-%, and substance B is present in an amount of about 0.1 wt.-% to about 20 wt.-%, wt.-% with respect to the weight of the whole composition.
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이 특허에 인용된 특허 (7)
Hauptmann, Holger; Schnagl, Robert; Frank, Sybille, Blank comprised of a zirconium oxide ceramic with an oxide additive and the use thereof.
Yoshida Masahiro (Hidaka JPX) Kimura Nobuo (Kanagawa JPX) Okamura Hiromichi (Ibaraki JPX), Ivory-colored zirconia sintered body, process for its production and its use.
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