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1. 发明公开

EP4032522A1 CURABLE COMPOSITION FOR DENTISTRY 审中-实审
公开(公告)号：EP4032522A1
公开(公告)日：2022-07-27
申请号：EP20865424.4
申请日：2020-09-18
申请人： Kuraray Noritake Dental Inc.
发明人： KAJIKAWA, Tatsuya , HORIGUCHI, Hirotaka
IPC分类号： A61K6/884 , A61K6/889
摘要： The present invention provides a dental curable composition, suited for applications such as dental composite resins, having a small polymerization shrinkage stress and a consistency to easily fill cavities, and that, in the form of a cured product, has excellent mechanical strength with low water absorbency while causing reduced wear on opposing teeth. The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), and a polymerization initiator (C),
the polymerizable monomer (A) containing a polyfunctional (meth)acrylic monomer (A-1) having no aromatic ring but having a moiety (X) constituted by an alkoxylene repeating unit having 1 to 15 carbon atoms, and a polyfunctional (meth)acrylic monomer (A-2) having an aromatic ring but no hydroxyl group,
the moiety (X) having a C/O of 2.5 to 10 as a ratio of a total number of carbon atoms and a total number of oxygen atoms in the moiety (X),
the moiety (X) having a backbone with a total of 25 to 60 constituent carbon atoms and oxygen atoms altogether,
the polyfunctional (meth)acrylic monomer (A-1) being 3 to 60 parts by mass in 100 parts by mass of the polymerizable monomer (A).

2. 发明公开

EP3925593A1 DENTAL MILL BLANK 无效
公开(公告)号：EP3925593A1
公开(公告)日：2021-12-22
申请号：EP20755452.8
申请日：2020-02-13
申请人： Kuraray Noritake Dental Inc.
发明人： HORIGUCHI, Hirotaka , NISHIGAKI, Naoki
IPC分类号： A61K6/831 , A61K6/887 , A61C5/77 , A61L27/10 , A61L27/16 , A61L27/44 , A61L27/50
摘要： The present invention provides a dental mill blank having an excellent mechanical strength and an excellent water resistance according to which a decrease in mechanical strength can be suppressed even in an environment where water is present, for example, inside an oral cavity. The present invention relates to a dental mill blank including: a polymer (A); and continuous inorganic fibers (B) that are oriented substantially in one direction, wherein the dental mill blank has a decreasing rate of 40% or less in three-point flexural strength after immersion in 70°C water for seven days.

3. 发明公开

EP3479909A1 DISPENSER 审中-公开
公开(公告)号：EP3479909A1
公开(公告)日：2019-05-08
申请号：EP17820356.8
申请日：2017-06-30
申请人： Kuraray Noritake Dental Inc. , Yoshino Kogyosho Co., Ltd.
发明人： HORIGUCHI, Hirotaka , YOSHIMURA Kazuhisa , TOMA Toru
IPC分类号： B05C5/00 , B05C17/01 , B65D83/76
摘要： A dispenser that can prevent leakage of contents from a nozzle tip when stopping discharging the contents is provided. A dispenser 1 comprises: a syringe body 10 that has a filled space M of contents, and has a discharge hole 45a at a tip thereof; a plunger 20 that is slid in the syringe body 10 by application of a pushing force, to discharge the contents in the filled space M from the discharge hole 45a; and a piston 30 that is formed of an elastic material and located at a tip part of the plunger 20, wherein a gap G is formed between an inner peripheral surface of the syringe body 10 and an outer peripheral surface of the piston 30, when the plunger 20 is pushed, the piston 30 deforms to narrow the gap G, and a back leakage risk (= (gap (G) area / final discharge hole area)) after the deformation of the piston 30 is 0 or more and less than 1.

4. 发明公开

EP4238546A1 DENTAL CURABLE COMPOSITION HAVING GOOD COLOR COMPATIBILITY 审中-实审
公开(公告)号：EP4238546A1
公开(公告)日：2023-09-06
申请号：EP21886310.8
申请日：2021-10-28
申请人： Kuraray Noritake Dental Inc.
发明人： KAJIKAWA, Tatsuya , HORIGUCHI, Hirotaka , KAMEYA, Takehiro
IPC分类号： A61K6/887 , A61K6/15 , A61K6/16 , A61K6/17 , A61K6/30 , A61K6/60 , A61K6/65 , A61K6/76 , A61K6/84
摘要： The present invention provides a dental curable composition that enables a highly aesthetic restoration that blends in so well with the surroundings that it is almost indistinguishable from natural teeth, and that, despite being a single dental curable composition, shows good color compatibility with natural teeth over a wide range of shades, particularly in cases involving cavity floors in different classes of cavities, such as Class I, Class II, and Class V. The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), a polymerization initiator (C), and a colorant (D), wherein the ratios R 650/600 , R 700/600 , and R 750/600 of spectral reflectances at 650 nm, 700 nm, and 750 nm wavelengths to a spectral reflectance at 600 nm wavelength all fall within a range of 97% to 103% when measured for a 1.0 mm-thick cured product of the dental curable composition against a white background with a spectral colorimeter.

5. 发明公开

EP4082513A1 DENTAL RESTORATION MATERIAL COMPOSITION 审中-实审
公开(公告)号：EP4082513A1
公开(公告)日：2022-11-02
申请号：EP20904704.2
申请日：2020-12-24
申请人： Kuraray Noritake Dental Inc.
发明人： HORIGUCHI, Hirotaka , KAJIKAWA, Tatsuya
IPC分类号： A61K6/80 , A61K6/889
摘要： The present invention provides a dental restoration material composition that is low in polymerization shrinkage stress, and that excels in mechanical strength and polishability in the form of a cured product. The present invention relates to a dental restoration material composition comprising a (meth)acrylic acid ester compound (A) having two or more (meth)acryloyloxy groups per molecule, a mono(meth)acrylic acid ester compound (B), a polymerization initiator (C), and an organic-inorganic composite filler (D), the mono(meth)acrylic acid ester compound (B) comprising at least one selected from the group consisting of a mono(meth)acrylic acid ester compound (B-1) represented by the following general formula (I), and a mono(meth)acrylic acid ester compound (B-2) represented by the following general formula (II).

[Descriptions of the symbols in the formulae are omitted.]

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