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1. 发明公开

EP3214057A1 ZIRCONIA COMPOSITION, ZIRCONIA CALCINED BODY AND ZIRCONIA SINTERED BODY, AND DENTAL PRODUCT 审中-实审
公开(公告)号：EP3214057A1
公开(公告)日：2017-09-06
申请号：EP15856037.5
申请日：2015-10-30
申请人： Kuraray Noritake Dental Inc.
发明人： ITO, Yoshihisa , MATSUMOTO, Atsushi , EMOTO, Tomohiro
IPC分类号： C04B35/48 , A61C13/083 , A61K6/02
CPC分类号： C04B35/48 , A61C5/73 , A61C13/0022 , A61C13/083 , A61K6/0094 , A61K6/024 , A61K6/025 , C04B35/486 , C04B35/488 , C04B35/6261 , C04B35/62625 , C04B35/62675 , C04B35/62695 , C04B35/64 , C04B35/6455 , C04B41/009 , C04B41/5038 , C04B41/87 , C04B2111/00836 , C04B2111/82 , C04B2235/3206 , C04B2235/3208 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3243 , C04B2235/3244 , C04B2235/3248 , C04B2235/3251 , C04B2235/3262 , C04B2235/3272 , C04B2235/3274 , C04B2235/3275 , C04B2235/3279 , C04B2235/3418 , C04B2235/3427 , C04B2235/602 , C04B2235/6026 , C04B2235/604 , C04B2235/656 , C04B2235/668 , C04B2235/762 , C04B2235/765 , C04B2235/9661 , C09C1/0009 , C09C1/0012
摘要： Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.

2. 发明公开

EP2995434A1 ZIRCONIA SINTERED BODY, ZIRCONIA COMPOSITION AND ZIRCONIA CALCINED BODY, PRODUCTION METHOD OF THESE, AND DENTAL PROSTHESIS 有权
标题翻译：烧结ZIRKONOXIDKÖRPER，ZIRKONOXIDZUSAMMENSETZUNG和煅烧ZIRKONOXIDKÖRPER，工艺用于生产和牙科修复体
公开(公告)号：EP2995434A1
公开(公告)日：2016-03-16
申请号：EP14795059.6
申请日：2014-05-08
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： B28B1/08 , A61C13/083 , A61C13/09 , C04B35/48
CPC分类号： A61C13/083 , A61C13/09 , B28B5/00 , B32B3/26 , B32B5/16 , B32B5/30 , B32B18/00 , B32B2264/102 , B32B2264/107 , B32B2535/00 , C04B35/48 , C04B35/486 , C04B35/62645 , C04B35/62675 , C04B35/6455 , C04B2235/3206 , C04B2235/3208 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3229 , C04B2235/3232 , C04B2235/3241 , C04B2235/3272 , C04B2235/3418 , C04B2235/6026 , C04B2235/604 , C04B2235/765 , C04B2235/81 , C04B2235/96 , C04B2235/9653 , C04B2235/9661 , C04B2237/348 , C04B2237/58
摘要： A zirconia sintered body having gradation is provided. A method for preparing a zirconia composition comprises preparing a plurality of powders for lamination; the lamination powders containing zirconia, a stabilizer(s) suppressing phase transition of zirconia and a pigment(s) at respective different pigment content ratios, and laminating the lamination powders in a mold. In the laminating step, the mold is vibrated after at least two lamination powders are charged into the mold.

3. 发明公开

EP2975011A1 SINTERED ZIRCONIA COMPACT, AND ZIRCONIA COMPOSITION AND CALCINED COMPACT 有权
标题翻译：烧结锆石紧凑，锆石组合和煅制紧凑
公开(公告)号：EP2975011A1
公开(公告)日：2016-01-20
申请号：EP14765463.6
申请日：2014-03-10
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： C04B35/48 , A61C13/083
CPC分类号： C04B35/49 , C04B35/486 , C04B35/62645 , C04B35/64 , C04B2235/3217 , C04B2235/3225 , C04B2235/3232 , C04B2235/3418 , C04B2235/5445 , C04B2235/5454 , C04B2235/5472 , C04B2235/782 , C04B2235/785 , C04B2235/9653
摘要： When a cross-sectional area of each zirconia crystal grain is calculated in an image of a cross section of a zirconia sintered body; a converted crystal grain size of each zirconia crystal grain is calculated based on the cross-sectional area on the assumption that each zirconia crystal grain has a circular cross-sectional shape; the zirconia crystal grains are classified into a class of smaller than 0.4 µm, a class of from 0.4 µm to smaller than 0.7 µm, and a class of 0.76 µm or greater based on the converted crystal grain size; a total cross-sectional area of the zirconia crystal grains is calculated in each of the classes; and a rate of the cross-sectional area to a total cross-sectional area of all zirconia crystal grains whose cross-sectional area has been calculated is calculated in each class, the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of smaller than 0.4 µm ranges from 4% to 35%, the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of from 0.4 µm to smaller than 0.76 µm ranges from 24% to 57%, and the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of 0.76 µm or greater ranges from 16% to 62%.
摘要翻译：当在氧化锆烧结体的横截面的图像中计算每个氧化锆晶粒的横截面面积时，假定每个氧化锆晶粒具有圆形截面形状，基于截面面积计算每个氧化锆晶粒的转化晶粒大小; 基于转化的晶粒大小，氧化锆晶粒分为小于0.4μm的类别，从0.4μm到小于0.7μm的类别和0.76μm以上的类别; 计算每种类别中氧化锆晶粒的总横截面面积; 计算截面面积相对于计算出截面积的全部氧化锆结晶粒子的总截面积的比例，并求出各分级中的氧化锆结晶粒子的截面积的比例小于0.4μm的转换晶粒尺寸的范围为4％至35％，氧化锆晶粒的横截面面积在转换后的晶粒尺寸范围内为0.4μm至小于0.76 μm的范围为24％〜57％，氧化锆晶粒的换算结晶粒径为0.76μm以上的范围的比例为16％〜62％。

4. 发明公开

EP4223723A1 ZIRCONIA CALCINED BODY HAVING EXCELLENT MACHINABILITY 审中-实审
公开(公告)号：EP4223723A1
公开(公告)日：2023-08-09
申请号：EP21875649.2
申请日：2021-09-28
申请人： Kuraray Noritake Dental Inc.
发明人： NAKANO, Kirihiro , SAKAI, Kazuya , KASHIKI, Nobusuke , ITO, Sho , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： C04B35/486 , A61C5/70 , A61C13/083
摘要： The present invention provides a zirconia pre-sintered body having excellent machinability and having a low probability of pillar fracture or chipping during milling. A method of production of such a zirconia pre-sintered body is also provided. The present invention relates to a zirconia pre-sintered body comprising zirconia, and a stabilizer capable of reducing a phase transformation of zirconia, the content of the stabilizer being 3 to 8 mol% relative to the total mole of the zirconia and the stabilizer, at least a part of the stabilizer being not dissolved in zirconia as a solid solution, and the zirconia pre-sintered body having a Vickers hardness of 65 to 135HV 5/30 as measured in compliance with JIS Z 2244:2009.

5. 发明公开

EP4177234A1 ZIRCONIA CALCINED BODY SUITABLE FOR DENTAL USE 审中-实审
公开(公告)号：EP4177234A1
公开(公告)日：2023-05-10
申请号：EP21833528.9
申请日：2021-07-01
申请人： Kuraray Noritake Dental Inc.
发明人： KATO, Shinichiro , MATSUMOTO, Atsushi
IPC分类号： C04B35/488 , A61C5/77 , A61C13/083 , C01G25/02 , C04B35/48
摘要： The present invention provides a zirconia pre-sintered body that exhibits suitable shade, translucency, and strength with short firing. The present invention relates to a zirconia pre-sintered body comprising a multilayer structure including at least three layers containing zirconia and a stabilizer capable of reducing a phase transformation of zirconia, the zirconia comprising predominantly monoclinic crystal system, the multilayer structure including at least two layers that differ from one another in the content of the stabilizer relative to the total mole of the zirconia and the stabilizer, the multilayer structure including at least two layers having substantially the same stabilizer content relative to the total mole of the zirconia and the stabilizer, the zirconia pre-sintered body containing a color component in all of the layers having substantially the same stabilizer content, and the layers having substantially the same stabilizer content differing from one another in the composition of the color component.

6. 发明公开

EP3266439A1 ZIRCONIA COMPOSITION, ZIRCONIA CALCINED BODY AND ZIRCONIA SINTERED BODY, AND DENTAL PRODUCT 审中-实审
标题翻译：氧化锆组成，氧化锆煅烧体和氧化锆烧结体，牙科产品
公开(公告)号：EP3266439A1
公开(公告)日：2018-01-10
申请号：EP17180987.4
申请日：2015-10-30
申请人： Kuraray Noritake Dental Inc.
发明人： ITO, Yoshihisa , MATSUMOTO, Atsushi , EMOTO, Tomohiro
IPC分类号： A61K6/00 , C04B35/626 , C04B35/486 , C04B35/488 , A61K6/02 , A61C13/00 , C04B35/645 , C04B41/00
CPC分类号： C04B35/48 , A61C5/73 , A61C13/0022 , A61C13/083 , A61K6/0094 , A61K6/024 , A61K6/025 , C04B35/486 , C04B35/488 , C04B35/6261 , C04B35/62625 , C04B35/62675 , C04B35/62695 , C04B35/64 , C04B35/6455 , C04B41/009 , C04B41/5038 , C04B41/87 , C04B2111/00836 , C04B2111/82 , C04B2235/3206 , C04B2235/3208 , C04B2235/3217 , C04B2235/3224 , C04B2235/3225 , C04B2235/3229 , C04B2235/3232 , C04B2235/3239 , C04B2235/3241 , C04B2235/3243 , C04B2235/3244 , C04B2235/3248 , C04B2235/3251 , C04B2235/3262 , C04B2235/3272 , C04B2235/3274 , C04B2235/3275 , C04B2235/3279 , C04B2235/3418 , C04B2235/3427 , C04B2235/602 , C04B2235/6026 , C04B2235/604 , C04B2235/656 , C04B2235/668 , C04B2235/762 , C04B2235/765 , C04B2235/9661 , C09C1/0009 , C09C1/0012
摘要： Provided is a zirconia sintered body that suppresses discoloration due to porcelain. The zirconia sintered body comprises at least one of a coloring agent A: erbium oxide and a coloring agent B: nickel oxide, and a composite oxide of zirconium and vanadium.
摘要翻译：本发明提供一种抑制由瓷器引起的变色的氧化锆烧结体。氧化锆烧结体包含着色剂A：氧化铒和着色剂B：氧化镍中的至少一种，以及锆和钒的复合氧化物。

7. 发明公开

EP3202749A1 ZIRCONIA SINTERED BODY, AND ZIRCONIA COMPOSITION AND CALCINED BODY 审中-实审
标题翻译：氧化锆烧结体，氧化锆组成和煅烧体
公开(公告)号：EP3202749A1
公开(公告)日：2017-08-09
申请号：EP17156637.5
申请日：2014-03-10
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： C04B35/48 , A61C13/083
CPC分类号： C04B35/49 , C04B35/486 , C04B35/62645 , C04B35/64 , C04B2235/3217 , C04B2235/3225 , C04B2235/3232 , C04B2235/3418 , C04B2235/5445 , C04B2235/5454 , C04B2235/5472 , C04B2235/782 , C04B2235/785 , C04B2235/9653
摘要： When a cross-sectional area of each zirconia crystal grain is calculated in an image of a cross section of a zirconia sintered body; a converted crystal grain size of each zirconia crystal grain is calculated based on the cross-sectional area on the assumption that each zirconia crystal grain has a circular cross-sectional shape; the zirconia crystal grains are classified into a class of smaller than 0.4µm, a class of from 0.4µm to smaller than 0.76µm, and a class of 0.76µm or greater based on the converted crystal grain size; a total cross-sectional area of the zirconia crystal grains is calculated in each of the classes; and a rate of the cross-sectional area to a total cross-sectional area of all zirconia crystal grains whose cross-sectional area has been calculated is calculated in each class, the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of smaller than 0.4µm ranges from 4% to 35%, the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of from 0.4µm to smaller than 0.76µm ranges from 24% to 57%, and the rate of the cross-sectional area of the zirconia crystal grains in the class of the converted crystal grain size of 0.76µm or greater ranges from 16% to 62%.
摘要翻译：当在氧化锆烧结体的横截面的图像中计算每个氧化锆晶粒的横截面面积时，假定每个氧化锆晶粒具有圆形截面形状，基于截面面积计算每个氧化锆晶粒的转化晶粒大小; 氧化锆晶粒按转换的晶粒大小分为小于0.4μm的类，0.4μm至小于0.76μm的类和0.76μm或更大的类; 计算每种类别中氧化锆晶粒的总横截面面积; 计算截面面积相对于计算出截面积的全部氧化锆结晶粒子的总截面积的比例，并求出各分级中的氧化锆结晶粒子的截面积的比例转换后的晶粒尺寸小于0.4μm的范围为4％至35％，氧化锆晶粒的横截面面积在0.4μm至小于0.76的范围内 μm的范围为24％〜57％，氧化锆结晶粒子的换算结晶粒径为0.76μm以上的范围的比例为16％〜62％。

8. 发明公开

EP3988517A1 A ZIRCONIA PRE-SINTERED BODY 审中-实审
公开(公告)号：EP3988517A1
公开(公告)日：2022-04-27
申请号：EP21213862.2
申请日：2014-05-08
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： C04B35/48 , A61C13/083 , B28B1/08 , C04B35/64
摘要： A zirconia sintered body is provided in which the strength between layers of powders is improved. A flexural strength of a test sample of the zirconia sintered body, measured pursuant to JISR1601, is not less than 1100MPa. The test sample is formed by preparing a plurality of zirconia powders, each containing zirconia and a stabilizer that suppresses phase transition of zirconia, the zirconia powders differing in a composition, layering the zirconia powders to form a zirconia composition, and sintering the zirconia composition to form a zirconia sintered body. The flexural strength is measured such that a load point is positioned at a boundary of the zirconia powders, the boundary traversing the test sample of the sintered body along a direction of load application.

9. 发明授权

EP2975011B1 SINTERED ZIRCONIA COMPACT, AND ZIRCONIA COMPOSITION AND CALCINED COMPACT 有权
公开(公告)号：EP2975011B1
公开(公告)日：2020-04-22
申请号：EP14765463.6
申请日：2014-03-10
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： C04B35/48 , A61C13/083

10. 发明授权

EP2995434B1 METHODS FOR PRODUCING ZIRCONIA SINTERED BODIES, ZIRCONIA COMPOSITIONS AND ZIRCONIA CALCINED BODIES 有权
公开(公告)号：EP2995434B1
公开(公告)日：2020-02-19
申请号：EP14795059.6
申请日：2014-05-08
申请人： Kuraray Noritake Dental Inc.
发明人： YAMADA, Yoshihisa , MATSUMOTO, Atsushi , ITO, Yoshihisa
IPC分类号： B28B1/08 , A61C13/083 , A61C13/09 , C04B35/48

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