公开(公告)号：US20190282455A1

公开(公告)日：2019-09-19

申请号：US16463796

申请日：2017-11-28

Applicant: TOKUYAMA DENTAL CORPORATION

Inventor： Tomonao SHIMIZU ,  Junichiro YAMAGAWA ,  Yuko NAGASAWA

IPC: A61K6/087 ,  A61K6/00 ,  A61C5/77 ,  A61C13/20

Abstract: A polyaryletherketone resin material is provided for dental use having high color tone stability in the case of exposure to visible light. The polyaryletherketone resin material for dental use includes a polyaryletherketone resin, which is a thermoplastic resin containing at least an aromatic group, an ether group (ether bond), and a ketone group (ketone bond) in its structural unit, and having a b* value of 10.0 or more in terms of colorimetric value of a 1.0 mm molded body in a CIELab color system under a black background condition.

公开(公告)号：US20190274931A1

公开(公告)日：2019-09-12

申请号：US16335069

申请日：2017-10-12

Applicant: TOKUYAMA DENTAL CORPORATION

Inventor： Junichiro YAMAGAWA ,  Tomonao SHIMIZU ,  Yuko NAGASAWA ,  Anna UEHARA

IPC: A61K6/087 ,  A61K6/027 ,  A61K6/04

Abstract: A dental resin composite material is provided that is reduced in darkness of its color tone, and also reduced in burning and color unevenness. Specifically provided are a dental resin composite material including 100 parts by mass of a polyaryletherketone resin, 10 parts by mass to 300 parts by mass of inorganic particles, and 90 ppm or less of an impurity having an aromatic ring, a method of producing the dental resin composite material, and a polyaryletherketone resin for producing a dental resin composite material, to be used for producing the dental resin composite material.

公开(公告)号：US20190038515A1

公开(公告)日：2019-02-07

申请号：US15760535

申请日：2016-10-27

Applicant: TOKUYAMA DENTAL CORPORATION

Inventor： Junichiro YAMAGAWA ,  Tatsuya YAMAZAKI ,  Takuma MATSUO ,  Takuya SUZUKI

IPC: A61K6/00 ,  A61K6/083

Abstract: To provide a cured product having high fracture energy, provided are a curable composition, including: organic-inorganic composite particles; (a polymerizable monomer; a polymerization initiator; and inorganic particles, in which a cured body formed by curing the curable composition includes: a matrix formed by curing all constituent components of the curable composition except for the organic-inorganic composite particles; and the organic-inorganic composite particles dispersed and contained in the cured body, and in which an elastic modulus M of the matrix is larger than an elastic modulus P of the organic-inorganic composite particles by 3.0 GPa or more, a curable composition for dental use, and an organic-inorganic composite particle for dental use.

公开(公告)号：US20180303587A1

公开(公告)日：2018-10-25

申请号：US15770220

申请日：2016-10-25

Applicant: Tokuyama Dental Corporation

Inventor： Junichiro YAMAGAWA ,  Tomonao SHIMIZU ,  Yuko NAGASAWA

IPC: A61C13/00 ,  A61C13/08 ,  A61C13/09 ,  C08K3/36 ,  C08K3/22 ,  A61K6/04 ,  A61K6/06 ,  A61K6/087 ,  C08J5/00 ,  B29C45/00

CPC classification number: A61C13/0022 ,  A61C13/0004 ,  A61C13/081 ,  A61C13/087 ,  A61C13/09 ,  A61K6/027 ,  A61K6/046 ,  A61K6/0612 ,  A61K6/087 ,  B29C45/0001 ,  B29C45/0055 ,  B29K2101/12 ,  B29K2105/16 ,  B29L2031/7532 ,  C08J5/00 ,  C08J2371/10 ,  C08K3/00 ,  C08K3/22 ,  C08K3/36 ,  C08K2003/2241 ,  C08L101/00

Abstract: A resin block that can be favorably used for obtaining dental prosthetics through the milling work, containing very little voids, having excellent property for being cut, exhibiting excellent appearance and mechanical strength, and without permitting the formation of defective products. The resin block contains a thermoplastic resin having a fluidizing temperature in a range of 310 to 500° C. and inorganic particles in an amount of 30 to 150 parts by mass per 100 parts by mass of said thermoplastic resin. The inorganic particles are at least one kind of inorganic oxide particles selected from the group consisting of silica particles, silica composite particles of silica and other metal oxides, titania particles, and titania composite particles of titania and other metal oxides. The resin block has a thick portion of a thickness of at least not less than 5 mm, and does not contain any void whose length is not less than 1.0 mm.

公开(公告)号：US20200253835A1

公开(公告)日：2020-08-13

申请号：US16647045

申请日：2018-09-14

Applicant: Tokuyama Dental Corporation

Inventor： Junichiro YAMAGAWA ,  Akiyoshi MORI ,  Yuko NAGASAWA ,  Takuya SUZUKI ,  Yohei SEYA

IPC: A61K6/887 ,  A61K6/84 ,  A61K6/833 ,  A61K6/836

Abstract: A dental curable composition which comprises a radically polymerizable monomer component (A), a polymerizing catalyst (B) and an inorganic granular material (C), characterized in that: the radically polymerizable monomer component (A) contains a bifunctional monomer (A-1) represented by the following formula (α), RP—SP1—RP   (α) where, RP is a radically polymerizable group represented by CH2═C(R)—COO— or CH2═C(R)—CONH—, wherein R is a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, and SP1 is a hydrocarbon group having 5 to 15 carbon atoms, and the content of the bifunctional monomer (A-1) in the radically polymerizable monomer component (A) is 5 to 40% by mass under a condition that the content of a diluting monomer (A-2) represented by the following formula (β), RP—SP2—RP   (β) where, RP is as defined in the above formula (α), and SP2 is an aliphatic hydrocarbon group different from. SP1, an oxygen-containing aliphatic hydrocarbon group having not less than 2 oxygen atoms, or an oxygen-containing aromatic hydrocarbon group having not less than 3 oxygen atoms, is zero or not more than 10% by mass.