公开(公告)号：US20210401552A1

公开(公告)日：2021-12-30

申请号：US17193466

申请日：2021-03-05

Applicant: SHOFU INC.

Inventor： Kazumichi NONAKA ,  Shuhei TAKAHASHI ,  Mitsuji TERAMAE

IPC: A61C13/00 ,  A61C13/083 ,  B32B18/00

Abstract: [Problem]
To provide 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.
[Solution]
A zirconia mill blank for dental cutting and machining comprises at least two intermediate layers LA and LB which satisfy the following Formula (1) and Formula (2), wherein the layer LA is contained in a section A in which a distance from one plane of two planes is within 40% of the distance between the two planes and the layer LB is contained in a section B in which a distance from the other plane is within 40% of the distance between the two planes, wherein in a case in which, a sintered body prepared by sintering at 1550° C. a test specimen cut out from the layer LA is defined as sintered body SA, a sintered body at 1550° C. prepared by sintering a test specimen cut out from the layer LB is defined as sintered body SB, a contrast ratio of the sintered body SA at a sample having a thickness of 1 mm is defined as contrast ratio CA and a contrast ratio of the sintered body SB at a sample having a thickness of 1 mm is defined as contrast ratio CB, the contrast ratios CA and CB satisfy the following Formula (3), change directions of yttria concentration, alumina concentration and contrast ratio in a stacking direction are not changed by the at least two intermediate layers. Yttria concentration of layer LA−Yttria concentration of layer LB>1.0 mol %  Formula (1): 0.0 wt. %

公开(公告)号：US20170196667A1

公开(公告)日：2017-07-13

申请号：US15178644

申请日：2016-06-10

Applicant: SHOFU INC.

Inventor： Mitsuji TERAMAE ,  Masanori GOTO

IPC: A61C13/08 ,  A61C13/09 ,  A61C13/087 ,  A61C13/00

CPC classification number: A61C13/082 ,  A61C13/0022 ,  A61C13/087 ,  A61C13/09 ,  A61K6/0005 ,  A61K6/083

Abstract: 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.

公开(公告)号：US20170181932A1

公开(公告)日：2017-06-29

申请号：US15300669

申请日：2015-03-31

Applicant: MITSUI CHEMICALS, INC. ,  SHOFU INC. ,  SUN MEDICAL CO., LTD.

Inventor： Kazuhiko YOSHINAGA ,  Hiroshi NARUSE ,  Mitsuji TERAMAE ,  Kiyomi FUCHIGAMI ,  Hidefumi FUJIMURA ,  Masuji TSUCHIKAWA ,  Hirofumi IMAI

IPC: A61K6/083 ,  A61K6/00

CPC classification number: A61K6/083 ,  A61K6/0023 ,  A61K6/0073 ,  A61K6/0097 ,  A61K6/0835 ,  C07C271/20 ,  C07C2102/42 ,  C08L33/10

Abstract: 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 C6-9 aromatic hydrocarbon group or a divalent C6-9 bridged 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.

公开(公告)号：US20170174621A1

公开(公告)日：2017-06-22

申请号：US15300696

申请日：2015-03-31

Applicant: MITSUI CHEMICALS, INC. ,  SHOFU INC. ,  SUN MEDICAL CO., LTD.

Inventor： Kazuhiko YOSHINAGA ,  Hiroshi NARUSE ,  Mitsuji TERAMAE ,  Kiyomi FUCHIGAMI ,  Hidefumi FUJIMURA ,  Masuji TSUCHIKAWA ,  Hirofumi IMAI

IPC: C07C271/20 ,  A61K6/083

CPC classification number: A61K6/083 ,  A61K6/0023 ,  A61K6/0073 ,  A61K6/0097 ,  A61K6/0835 ,  C07C271/20 ,  C07C2102/42 ,  C08L33/10

Abstract: 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.

公开(公告)号：US20170151041A1

公开(公告)日：2017-06-01

申请号：US15362867

申请日：2016-11-29

Applicant: SHOFU INC.

Inventor： Masanori GOTO ,  Toshio KITAMURA ,  Mitsuji TERAMAE

IPC: A61C13/00 ,  A61C13/09 ,  A61C13/08

CPC classification number: A61C13/0022 ,  A61C5/10 ,  A61C5/30 ,  A61C13/082 ,  A61C13/087 ,  A61C13/09

Abstract: 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: CU, lowermost layer: CL) as indices for the transparency of the uppermost layer (U) and the transparency of the lowermost layer (L) satisfy the following relations: 0.30≦CU≦0.60 0.55≦CL≦0.90 CU