Shofu Inc.

Kabushikikaisha Shofu

Mitsui Chemicals, Inc.

Sun Medical Co., Ltd.

Jgc Catalysts & Chemicals Ltd.

Mitsuji Teramae

Jun Uchida

Shuhei Takahashi

Hidefumi Fujimura

Masanori Goto

Mitsuharu Mizuno

Hiroshi Naruse

Kazuhiko Yoshinaga

Kiyomi Fuchigami

Masuji Tsuchikawa

Hirofumi Imai

Naoyuki Enomoto

Toshio Kitamura

Ryuichi Yoshimoto

Kazumichi Nonaka

Daisuke Takeuchi

Kunio Hori

Yushin Okimoto

A zirconia mill blank for dental cutting and machining which may impart reproducibility of color tone similar to a natural tooth and high strength to a zirconia perfect sintered body without a special sintering method such as HIP treatment. The zirconia mill blank for dental cutting and machining comprises at least two intermediate layers LA and LB which satisfy the Formula (1) and Formula (2) defined herein, and change directions of yttria concentration, alumina concentration and contrast ratio in a stacking direction are not changed by the at least two intermediate layers.

Zirconia mill blank having layers with different contents of yttria and alumina

The present invention relates to a composite material which can be used as a dental prosthesis device (crown, bridge), and specifically, relates to a composite material including a curable resin and a fiber material, and more specifically relates to a block-like composite material for dental cutting and processing characterized by having a multilayered structure including at least two layers having different transparencies. There are no technical information relating to a color tone and a transparency of the fiber material. To provide a block-like composite material for dental cutting and processing, wherein the block-like composite material has a multilayered structure including at least two layers having different transparencies, and the each layer includes a curable resin and a fiber material.

Block-like composite material for dental cutting and processing having multilayered structure including layers with different transparencies and containing fiber material

The present invention provides a dental curable composition comprising (A) a polymerizable monomer, (B) an inorganic filler, and (C) a polymerization initiator,

Dental curable composition having high mechanical strength

To provide a dental lithium silicate glass composition capable of providing a dental lithium silicate glass ceramic capable of efficiently precipitating the main crystals (lithium disilicate and/or lithium metasilicate) even after heat treatment. To provide a AlO-free dental lithium silicate glass composition including the following components: SiO: 60.0 to 80.0% by weight, LiO: 10.0 to 17.0% by weight, KO: 0.5 to 10.0% by weight, ZrO: 0.0 to 5.0% by weight, a nucleating agent: 1.0 to 6.0% by weight, a glass stabilizer: 0.0 to 8.0% by weight and a colorant: 0.0 to 10.0% by weight.

AlO-free lithium silicate glass composition

Provided are dental polymerizable monomer compositions that can give cured products having high toughness and high rigidity, and dental compositions containing such dental polymerizable monomer compositions and cured products thereof having high mechanical properties. The dental polymerizable monomer composition includes a urethane acrylate compound (A) and a polymerizable compound (B) having at least one polymerizable group selected from methacryloyl groups and acryloyl groups, the urethane acrylate compound (A) being obtained by reacting a specific hydroxyacrylate (a1) with a diisocyanate (a2) having two isocyanate groups bonded to a divalent Caromatic hydrocarbon group or a divalent Cbridged cyclic hydrocarbon group via a methylene group optionally substituted with a hydrocarbon group in place of a hydrogen atom, the proportion of the number of acryloyl groups present in the urethane acrylate compound (A) being 10% to less than 90% relative to the total number of (meth)acryloyl groups in the monomer composition.

Dental polymerizable monomer compositions

Provided are dental polymerizable monomers that can give cured products having high toughness and high rigidity, dental polymerizable monomer compositions containing the polymerizable monomers, and dental compositions containing the dental polymerizable monomer compositions, and cured products thereof having high mechanical properties. The dental polymerizable monomer (A) which includes a urethane acrylate obtained from an appropriately rigid diisocyanate and an appropriately flexible hydroxyacrylate is used to prepare a dental polymerizable monomer composition containing the dental polymerizable monomer, and a dental composition containing the dental polymerizable monomer composition.

Dental polymerizable monomers

The present invention provides a dental curable composition used for dental filling restorative materials, dental crown prosthesis materials such as inlays, crowns, and bridges, materials for constructing anchor teeth, block materials for dental CAD/CAM, etc. More specifically, the present invention provides a dental curable composition comprising a curable resin (A), a porous inorganic filler (B), and a polymerization initiator (C), wherein the porous inorganic filler (B) comprises a silicon dioxide, and an oxide comprising at least one kind of the other metallic elements, and a ratio (I/I) of a maximum absorbance (I) of 3730 to 3750 cmto a maximum absorbance (I) of 3000 to 3600 cmin infrared absorption spectrum of the porous inorganic filler (B), is not less than 1 and not more than 3.

Dental curable composition

To provide a multilayer resin material for dental milling and machining, comprising an inorganic filler in a content of 40% by weight or more and a plurality of layers different in transparency and color tone from each other, wherein the thickness of the uppermost layer (U) and the thickness of the lowermost layer (L) are each 1 mm or more, the contrast ratios (uppermost layer: C, lowermost layer: C) as indices for the transparency of the uppermost layer (U) and the transparency of the lowermost layer (L) satisfy the following relations:0.30&#x2266;C&#x2266;0.600.55&#x2266;C&#x2266;0.90C&#x3c;C and the chromaticities (uppermost layer: L&#xb7;a&#xb7;b, lowermost layer: L&#xb7;a&#xb7;b) based on the L*a*b* colorimetric system as the indices of the color tones in the uppermost layer (U) and the lowermost layer (L) satisfy the following relations:60&#x2266;&#x2266;80&#x2212;3&#x2266;&#x2266;20&#x2266;&#x2266;30

Multilayer resin material for dental milling and machining

Provided are opaque materials exhibiting a good adhesive strength and a good color tone reproduction comparable with natural dental crowns as well as having a good operability. In addition, the opaque materials may exhibit a stain-resistance property in rebuilding-up a dental composition on the opaque materials in a cured form with a metal instrument. Further, the opaque materials may exhibit a good color tone reproduction comparable with natural dental crowns even if a dental membrane is thinly formed from the opaque metals. The dental membrane is formed from a first opaque layer and a second opaque layer, wherein the first opaque layer contains a filler of indefinite-shape particles and the second opaque layer contains a filler of spherical-shape particles, and wherein the first opaque layer is formed on a metal base and the second opaque layer is formed on the first opaque layer.

Dental material set and a dental membrane for obscuring a metal color of a dental metal, and a preparing method thereof

A dental coloring material composition comprising containing:

Mixable and color tone freely reproducible dental coloring material composition, and set and method thereof

Disclosed is a dental composition comprising 0.01 to 10 parts by weight of at least one kind of (a) a visible light-photopolymerization catalyst compound and one or more kinds of (b) di(meth)acrylate compounds represented by the general formula (I): wherein Rand Reach independently represent hydrogen or a methyl group, and a repeating unit number n of an ethylene oxide group is from 9 to 50.

Photopolymerizable dental composition with suppressed change in color tone by monomer

An object of the present invention is to provide a photopolymerizable dental composition which causes less change in a color tone before and after curing and exhibits excellent photopolymerizability to irradiation in a wide wavelength range, and has also excellent thin-layer surface curability, and to provide a photopolymerization initiator used therefor. Disclosed is a visible light-polymerizable dental composition which does not substantially contain an amine compound as a photosensitizer, comprising 0.01 to 10 parts by weight of a (bis)acylphosphine oxide compound, 0.01 to 10 parts by weight of an &#x3b1;-diketone compound and 100 parts by weight of a polymerizable monomer.

Growing community of inventors

Kyoto, Japan

Mitsuji Teramae