JP7493534B2 - 歯科用組成物 - Google Patents
歯科用組成物 Download PDFInfo
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- JP7493534B2 JP7493534B2 JP2021564046A JP2021564046A JP7493534B2 JP 7493534 B2 JP7493534 B2 JP 7493534B2 JP 2021564046 A JP2021564046 A JP 2021564046A JP 2021564046 A JP2021564046 A JP 2021564046A JP 7493534 B2 JP7493534 B2 JP 7493534B2
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- GOLORTLGFDVFDW-UHFFFAOYSA-N 3-(1h-benzimidazol-2-yl)-7-(diethylamino)chromen-2-one Chemical compound C1=CC=C2NC(C3=CC4=CC=C(C=C4OC3=O)N(CC)CC)=NC2=C1 GOLORTLGFDVFDW-UHFFFAOYSA-N 0.000 description 4
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- 239000012933 diacyl peroxide Substances 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 229940043279 diisopropylamine Drugs 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- OWMBTIRJFMGPAC-UHFFFAOYSA-N dimethylamino 2-methylprop-2-enoate Chemical compound CN(C)OC(=O)C(C)=C OWMBTIRJFMGPAC-UHFFFAOYSA-N 0.000 description 1
- QLZHNIAADXEJJP-UHFFFAOYSA-L dioxido-oxo-phenyl-$l^{5}-phosphane Chemical compound [O-]P([O-])(=O)C1=CC=CC=C1 QLZHNIAADXEJJP-UHFFFAOYSA-L 0.000 description 1
- MIBMTBXKARQXFP-UHFFFAOYSA-N diphenylphosphoryl-(2,3,5,6-tetramethylphenyl)methanone Chemical compound CC1=CC(C)=C(C)C(C(=O)P(=O)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1C MIBMTBXKARQXFP-UHFFFAOYSA-N 0.000 description 1
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- YGHIIBLLAKLTBT-UHFFFAOYSA-N ethyl 6-methoxy-2-oxochromene-3-carboxylate Chemical compound COC1=CC=C2OC(=O)C(C(=O)OCC)=CC2=C1 YGHIIBLLAKLTBT-UHFFFAOYSA-N 0.000 description 1
- ATXWFSDEXYKQST-UHFFFAOYSA-N ethyl 8-methoxy-2-oxochromene-3-carboxylate Chemical compound C1=CC(OC)=C2OC(=O)C(C(=O)OCC)=CC2=C1 ATXWFSDEXYKQST-UHFFFAOYSA-N 0.000 description 1
- UXYBXUYUKHUNOM-UHFFFAOYSA-M ethyl(trimethyl)azanium;chloride Chemical compound [Cl-].CC[N+](C)(C)C UXYBXUYUKHUNOM-UHFFFAOYSA-M 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- LIIALPBMIOVAHH-UHFFFAOYSA-N herniarin Chemical compound C1=CC(=O)OC2=CC(OC)=CC=C21 LIIALPBMIOVAHH-UHFFFAOYSA-N 0.000 description 1
- JHGVLAHJJNKSAW-UHFFFAOYSA-N herniarin Natural products C1CC(=O)OC2=CC(OC)=CC=C21 JHGVLAHJJNKSAW-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Chemical group 0.000 description 1
- 239000011630 iodine Chemical group 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910052747 lanthanoid Inorganic materials 0.000 description 1
- 150000002602 lanthanoids Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- JUYQFRXNMVWASF-UHFFFAOYSA-M lithium;phenyl-(2,4,6-trimethylbenzoyl)phosphinate Chemical compound [Li+].CC1=CC(C)=CC(C)=C1C(=O)P([O-])(=O)C1=CC=CC=C1 JUYQFRXNMVWASF-UHFFFAOYSA-M 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229960004963 mesalazine Drugs 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 229940095102 methyl benzoate Drugs 0.000 description 1
- OLXYLDUSSBULGU-UHFFFAOYSA-N methyl pyridine-4-carboxylate Chemical compound COC(=O)C1=CC=NC=C1 OLXYLDUSSBULGU-UHFFFAOYSA-N 0.000 description 1
- LKNDYQNNDRTHFP-UHFFFAOYSA-N n,n,3,4-tetramethylaniline Chemical compound CN(C)C1=CC=C(C)C(C)=C1 LKNDYQNNDRTHFP-UHFFFAOYSA-N 0.000 description 1
- NBFRQCOZERNGEX-UHFFFAOYSA-N n,n,3,5-tetramethylaniline Chemical compound CN(C)C1=CC(C)=CC(C)=C1 NBFRQCOZERNGEX-UHFFFAOYSA-N 0.000 description 1
- CWOMTHDOJCARBY-UHFFFAOYSA-N n,n,3-trimethylaniline Chemical compound CN(C)C1=CC=CC(C)=C1 CWOMTHDOJCARBY-UHFFFAOYSA-N 0.000 description 1
- GYVGXEWAOAAJEU-UHFFFAOYSA-N n,n,4-trimethylaniline Chemical compound CN(C)C1=CC=C(C)C=C1 GYVGXEWAOAAJEU-UHFFFAOYSA-N 0.000 description 1
- HKJNHYJTVPWVGV-UHFFFAOYSA-N n,n-diethyl-4-methylaniline Chemical compound CCN(CC)C1=CC=C(C)C=C1 HKJNHYJTVPWVGV-UHFFFAOYSA-N 0.000 description 1
- MJRUTYCVCLZWSR-UHFFFAOYSA-N n,n-dimethyl-4-propan-2-ylaniline Chemical compound CC(C)C1=CC=C(N(C)C)C=C1 MJRUTYCVCLZWSR-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- BFYJDHRWCNNYJQ-UHFFFAOYSA-N oxo-(3-oxo-3-phenylpropoxy)-(2,4,6-trimethylphenyl)phosphanium Chemical compound CC1=CC(C)=CC(C)=C1[P+](=O)OCCC(=O)C1=CC=CC=C1 BFYJDHRWCNNYJQ-UHFFFAOYSA-N 0.000 description 1
- UZLYXNNZYFBAQO-UHFFFAOYSA-N oxygen(2-);ytterbium(3+) Chemical compound [O-2].[O-2].[O-2].[Yb+3].[Yb+3] UZLYXNNZYFBAQO-UHFFFAOYSA-N 0.000 description 1
- 125000005704 oxymethylene group Chemical group [H]C([H])([*:2])O[*:1] 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- TZMFJUDUGYTVRY-UHFFFAOYSA-N pentane-2,3-dione Chemical compound CCC(=O)C(C)=O TZMFJUDUGYTVRY-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000005634 peroxydicarbonate group Chemical group 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-M phthalate(1-) Chemical compound OC(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-M 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000000068 pit and fissure sealant Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 239000011698 potassium fluoride Substances 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 150000003139 primary aliphatic amines Chemical class 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 229910001426 radium ion Inorganic materials 0.000 description 1
- 239000003829 resin cement Substances 0.000 description 1
- 229910001419 rubidium ion Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000005619 secondary aliphatic amines Chemical class 0.000 description 1
- 235000013024 sodium fluoride Nutrition 0.000 description 1
- 239000011775 sodium fluoride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229960004711 sodium monofluorophosphate Drugs 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229910001427 strontium ion Inorganic materials 0.000 description 1
- PWYYWQHXAPXYMF-UHFFFAOYSA-N strontium(2+) Chemical compound [Sr+2] PWYYWQHXAPXYMF-UHFFFAOYSA-N 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-M succinate(1-) Chemical compound OC(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-M 0.000 description 1
- BUUPQKDIAURBJP-UHFFFAOYSA-N sulfinic acid Chemical compound OS=O BUUPQKDIAURBJP-UHFFFAOYSA-N 0.000 description 1
- 150000003455 sulfinic acids Chemical class 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- GQIUQDDJKHLHTB-UHFFFAOYSA-N trichloro(ethenyl)silane Chemical compound Cl[Si](Cl)(Cl)C=C GQIUQDDJKHLHTB-UHFFFAOYSA-N 0.000 description 1
- 229960003500 triclosan Drugs 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910003454 ytterbium oxide Inorganic materials 0.000 description 1
- 229940075624 ytterbium oxide Drugs 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/15—Compositions characterised by their physical properties
- A61K6/16—Refractive index
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/15—Compositions characterised by their physical properties
- A61K6/17—Particle size
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Dental Preparations (AREA)
Description
[1]単量体(A)、重合開始剤(B)、ポリマー粒子(C)、及びフィラー(D)(ポリマー粒子(C)を除く)を含有し、硬化前の歯科用組成物について下記式〔I〕で示される光拡散度Dが0.10以上である、歯科用組成物;
D=(I20/cos20°+I70/cos70°)/(2I0) 〔I〕
(式中、Iは試料を透過した光の光度を表し、I0、I20及びI70は試料板に垂直な方向(光の入射方向)に対する、零度、20度、70度方向の光度(光の強さ)をそれぞれ表す。)
[2]前記ポリマー粒子(C)の平均粒子径が0.5μm~50μmである、[1]に記載の歯科用組成物;
[3]前記フィラー(D)が無機フィラーである、[1]又は[2]に記載の歯科用組成物;
[4]前記ポリマー粒子(C)が架橋ポリマー粒子である、[1]~[3]のいずれかに記載の歯科用組成物;
[5]前記ポリマー粒子(C)の屈折率が1.550以上である、[1]~[4]のいずれかに記載の歯科用組成物;
[6]前記ポリマー粒子(C)の含有量が歯科用組成物100質量部中0.1質量部~20質量部である、[1]~[5]のいずれかに記載の歯科用組成物;
[7]前記ポリマー粒子(C)の含有量が単量体成分の全量100質量部に対して、0.1質量部以上50質量部以下である、[1]~[6]のいずれかに記載の歯科用組成物;
[8]前記ポリマー粒子(C)が球状である、[1]~[7]のいずれかに記載の歯科用組成物;
[9]前記ポリマー粒子(C)と硬化前の全単量体混合物との屈折率差が0.020以上である、[1]~[8]のいずれかに記載の歯科用組成物;
[10]前記ポリマー粒子(C)が(メタ)アクリルポリマー粒子又はスチレンポリマー粒子からなる、[1]~[9]のいずれかに記載の歯科用組成物;
[11]前記単量体(A)が酸性基を有する単量体(A-1)を含む、[1]~[10]のいずれかに記載の歯科用組成物;
[12]前記単量体(A)が、酸性基を有しない疎水性単量体(A-2)を含む、[1]~[11]のいずれかに記載の歯科用組成物;
[13]前記重合開始剤(B)が、非水溶性光重合開始剤(B-2)を含む、[1]~[12]のいずれかに記載の歯科用組成物;
[14]前記フィラー(D)が、平均粒子径が1nm以上0.1μm未満の超微粒子無機フィラーを含む、[1]~[13]のいずれかに記載の歯科用組成物;
[15]前記フィラー(D)が、平均粒子径が1μm超10μm以下の無機フィラーを含む、[1]~[13]のいずれかに記載の歯科用組成物;
[16][1]~[15]のいずれかに記載の歯科用組成物からなる、歯科用コンポジットレジン;
[17][1]~[15]のいずれかに記載の歯科用組成物からなる、自己接着性歯科用コンポジットレジン;
[18][1]~[15]のいずれかに記載の歯科用組成物からなる、歯科用セメント;
を包含する。
D=(I20/cos20°+I70/cos70°)/(2I0) 〔I〕
(式中、Iは試料を透過した光の光度を表し、I0、I20及びI70は試料板に垂直な方向(光の入射方向)に対する、零度、20度、70度方向の光度(光の強さ)をそれぞれ表す。)
D=(I20/cos20°+I70/cos70°)/(2I0) 〔I〕
(式中、Iは試料を透過した光の光度を表し、I0、I20及びI70は試料板に垂直な方向(光の入射方向)に対する、零度、20度、70度方向の光度(光の強さ)をそれぞれ表す。)
単量体(A)としては、酸性基を有する単量体(A-1)、酸性基を有しない疎水性単量体(A-2)、酸性基を有しない親水性単量体(A-3)が挙げられる。単量体(A)は、1種を単独で配合してもよく、2種以上を併用してもよい。
・酸性基を有する単量体(A-1)
酸性基を有する単量体(A-1)は、酸エッチング効果及びプライマー処理効果を有しており、脱灰作用及び浸透作用を与える成分である。また、酸性基を有する単量体(A-1)は、重合可能であり、硬化作用も付与する。酸性基を有する単量体(A-1)を含有することにより、歯質に対する接着性と接着耐久性が向上する。
酸性基を有しない疎水性単量体(A-2)(以下、疎水性単量体(A-2)とする。)は、歯科用組成物の機械的強度、取り扱い性などを向上させる。酸性基を有さず、重合性基を有するラジカル単量体が好ましく、ラジカル重合が容易である観点から、重合性基は(メタ)アクリル基及び/又は(メタ)アクリルアミド基がより好ましい。疎水性単量体(A-2)とは、酸性基を有さず、かつ25℃における水に対する溶解度が10質量%未満の単量体を意味し、例えば、芳香族化合物系の二官能性単量体、脂肪族化合物系の二官能性単量体、三官能性以上の単量体などの架橋性の単量体が挙げられる。
本発明の歯科用組成物は、酸性基を有しない親水性単量体(A-3)(以下、親水性単量体(A-3)とする。)をさらに含むことが好ましい。親水性単量体(A-3)は、歯科用組成物の成分の歯質への浸透を促進するとともに、自らも歯質に浸透して歯質中の有機成分(コラーゲン)に接着する。親水性単量体(A-3)としては、酸性基を有さず、重合性基を有するラジカル単量体が好ましく、ラジカル重合が容易である観点から、重合性基は(メタ)アクリル基及び/又は(メタ)アクリルアミド基がより好ましい。親水性単量体(A-3)とは、酸性基を有さず、かつ25℃における水に対する溶解度が10質量%以上のものを意味し、該溶解度が30質量%以上のものが好ましく、25℃において任意の割合で水に溶解可能なものがより好ましい。親水性単量体(A-3)としては、水酸基、オキシメチレン基、オキシエチレン基、オキシプロプレン基、アミド基などの親水性基を有するものが好ましく、例えば、2-ヒドロキシエチル(メタ)アクリレート、3-ヒドロキシプロピル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、1,3-ジヒドロキシプロピル(メタ)アクリレート、2,3-ジヒドロキシプロピル(メタ)アクリレート、2-((メタ)アクリロイルオキシ)エチルトリメチルアンモニウムクロライド、ポリエチレングリコールジ(メタ)アクリレート(オキシエチレン基の数が9以上のもの)などの親水性の単官能性(メタ)アクリレート系単量体;N-メチロール(メタ)アクリルアミド、N-ヒドロキシエチル(メタ)アクリルアミド、N,N-ビス(2-ヒドロキシエチル)(メタ)アクリルアミド、N-メトキシメチル(メタ)アクリルアミド、N-エトキシメチル(メタ)アクリルアミド、ジアセトン(メタ)アクリルアミド、4-(メタ)アクリロイルモルホリン、N-トリヒドロキシメチル-N-メチル(メタ)アクリルアミド、N,N-ジメチルアクリルアミド及びN,N-ジエチルアクリルアミドなどの単官能性(メタ)アクリルアミド系単量体などが挙げられる。
重合開始剤(B)は大きく光重合開始剤と化学重合開始剤に分類され、さらに光重合開始剤は水溶性光重合開始剤(B-1)と非水溶性光重合開始剤(B-2)に分類される。重合開始剤(B)としては、水溶性光重合開始剤(B-1)のみを用いてもよく、非水溶性光重合開始剤(B-2)のみを用いてもよく、水溶性光重合開始剤(B-1)と非水溶性光重合開始剤(B-2)を併用してもよい。
水溶性光重合開始剤(B-1)は、親水的な歯面界面での重合硬化性が向上し、高い接着強さを実現できる。水溶性光重合開始剤(B-1)は、前記溶解度が10g/L以上であり、15g/L以上であることが好ましく、20g/L以上であることがより好ましく、25g/L以上であることがさらに好ましい。同溶解度が10g/L未満の場合は、接着界面部において水溶性光重合開始剤(B-1)が歯質中の水に十分に溶解せず、重合促進効果が発現しにくくなる。
本発明の歯科用組成物は、硬化性の観点から、水溶性光重合開始剤(B-1)以外に25℃の水への溶解度が10g/L未満である非水溶性光重合開始剤(B-2)(以下、非水溶性光重合開始剤(B-2)とする。)を含んでいてもよい。本発明に用いられる非水溶性光重合開始剤(B-2)は、公知の光重合開始剤を使用することができる。非水溶性光重合開始剤(B-2)は、1種を単独で配合してもよく、2種以上を組み合わせて配合してもよい。
本発明の歯科用組成物は、さらに化学重合開始剤を含有することができ、有機過酸化物が好ましく用いられる。上記の化学重合開始剤に使用される有機過酸化物は特に限定されず、公知のものを使用することができる。代表的な有機過酸化物としては、例えば、ケトンペルオキシド、ヒドロペルオキシド、ジアシルペルオキシド、ジアルキルペルオキシド、ペルオキシケタール、ペルオキシエステル、ペルオキシジカーボネートなどが挙げられる。これら有機過酸化物の具体例としては、国際公開第2008/087977号に記載のものが挙げられる。
ポリマー粒子(C)は、本発明の歯科用組成物において、重合収縮応力の抑制と機械的強度を両立するために用いられる。
本発明の歯科用組成物は、さらにフィラー(D)を含む。フィラー(D)は、ポリマー粒子(C)とも重複し得るが、本発明において、フィラー(D)としては、ポリマー粒子(C)と重複するものを除く。フィラー(D)としては、無機フィラー及び有機-無機複合フィラーに大別される。
他の実施形態では、非水溶性光重合開始剤(B-2)及び/又は化学重合開始剤とともに重合促進剤(E)が用いられる。本発明に用いられる重合促進剤(E)としては、例えば、アミン類、スルフィン酸及びその塩、ボレート化合物、バルビツール酸誘導体、トリアジン化合物、銅化合物、スズ化合物、バナジウム化合物、ハロゲン化合物、アルデヒド類、チオール化合物、亜硫酸塩、亜硫酸水素塩、チオ尿素化合物などが挙げられる。
本発明の歯科用組成物は、さらにフッ素イオン放出性物質を含んでいてもよい。フッ素イオン放出性物質を配合することによって、歯質に耐酸性を付与することができる歯科用組成物が得られる。かかるフッ素イオン放出性物質としては、例えば、フッ化ナトリウム、フッ化カリウム、モノフルオロリン酸ナトリウム、フッ化リチウム、フッ化イッテルビウムなどの金属フッ化物類などが挙げられる。上記フッ素イオン放出性物質は、1種を単独で配合してもよく、2種以上を組み合わせて配合してもよい。
本発明の歯科用組成物の好適な実施形態の一つとして、自己接着性歯科用コンポジットレジンが挙げられる。本発明の歯科用組成物からなる自己接着性歯科用コンポジットレジンは、酸性基を有する単量体(A-1)を含む。本発明の歯科用組成物を自己接着性歯科用コンポジットレジンとして用いる場合、単量体(A)、重合開始剤(B)、ポリマー粒子(C)、フィラー(D)及び重合促進剤(E)を含み、単量体(A)が酸性基を有する単量体(A-1)、酸性基を有さない疎水性単量体(A-2)、及び酸性基を有さない親水性単量体(A-3)を含むことが好ましい。また、重合開始剤(B)は光重合開始剤が好ましく、重合開始剤(B)が水溶性光重合開始剤(B-1)と非水溶性光重合開始剤(B-2)を含むことがより好ましい。本発明の歯科用組成物を自己接着性歯科用コンポジットレジンとして用いる場合、前処理材を使用してもよいが、自己接着性を有するため前処理材は必須ではなく、前処理材を使用しなくてもよい。前処理材を含まず、本発明の歯科用組成物のみからなる自己接着性歯科用コンポジットレジンとすることができる。
本発明の歯科用組成物の好適な実施形態の一つとして、歯科用コンポジットレジン(自己接着性歯科用コンポジットレジンを除く)が挙げられる。本発明の歯科用組成物からなる歯科用コンポジットレジンは、酸性基を有する単量体(A-1)を含まない。本発明の歯科用組成物を歯科用コンポジットレジンとして用いる場合、酸性基を有さない疎水性単量体(A-2)、酸性基を有さない親水性単量体(A-3)、重合開始剤(B)、ポリマー粒子(C)、フィラー(D)及び重合促進剤(E)を含むことが好ましい。また、重合開始剤(B)は光重合開始剤が好ましく、重合開始剤(B)が水溶性光重合開始剤(B-1)と非水溶性光重合開始剤(B-2)を含むことがより好ましい。本発明の歯科用組成物を歯科用コンポジットレジンとして用いる場合、歯科用ボンディング材、もしくは前処理材の使用が必須となる。
本発明の歯科用組成物の他の好適な実施形態の一つとして、歯科用セメントが挙げられる。歯科用セメントとしては、レジンセメント、グラスアイオノマーセメント、レジン強化型グラスアイオノマーセメントなどが好適なものとして挙げられる。歯科用セメントは、セルフエッチングプライマーなどを前処理材として用いてもよい。本発明の歯科用組成物を歯科用セメントとして用いる場合、単量体(A)、重合開始剤(B)、ポリマー粒子(C)、フィラー(D)及び重合促進剤(E)を含み、単量体(A)が酸性基を有する単量体(A-1)、酸性基を有さない疎水性単量体(A-2)、酸性基を有さない親水性単量体(A-3)を含むことが好ましい。また、重合開始剤(B)は化学重合開始剤を含むことが好ましく、化学重合開始剤と光重合開始剤とを含むことがより好ましい。光重合開始剤は水溶性光重合開始剤(B-1)と非水溶性光重合開始剤(B-2)とを含むことが好ましい。
MDP:10-メタクリロイルオキシデシルジヒドロジェンホスフェート
D-2.6E:2,2-ビス(4-メタクリロイルオキシポリエトキシフェニル)プロパン(エトキシ基の平均付加モル数が2.6のもの)
DD:1,10-デカンジオールジメタクリレート
MAEA:N-メタクリロイルオキシエチルアクリルアミド
・水溶性光重合開始剤(B-1)
Li-TPO:フェニル(2,4,6-トリメチルベンゾイル)ホスフィン酸リチウム塩(下記式(3)で表される化合物)
CQ:dl-カンファーキノン
SBX-4:球状架橋ポリスチレン粒子(積水化成品工業株式会社製、テクポリマー(登録商標)SBX-4、平均粒子径:4μm、屈折率:1.59)
SBX-6:球状架橋ポリスチレン粒子(積水化成品工業株式会社製、テクポリマー(登録商標)SBX-6、平均粒子径:6μm、屈折率:1.59)
SBX-8:球状架橋ポリスチレン粒子(積水化成品工業株式会社製、テクポリマー(登録商標)SBX-8、平均粒子径:8μm、屈折率:1.59)
MSX-6:球状架橋メタクリル酸メチル-スチレン共重合体粒子(積水化成品工業株式会社製、テクポリマー(登録商標)MSX-6、平均粒子径:6μm、屈折率:1.57)
無機フィラー1:日本アエロジル株式会社製微粒子シリカ「アエロジル(登録商標)R 972」、平均粒子径:16nm、屈折率:1.46
無機フィラー2:シラン処理珪石粉、屈折率:1.55
珪石粉(株式会社ニッチツ製、商品名:ハイシリカ)をボールミルで粉砕し、粉砕珪石粉を得た。得られた粉砕珪石粉の平均粒子径をレーザー回折式粒度分布測定装置(株式会社島津製作所製、型式「SALD-2300」)を用いて0.2%ヘキサメタリン酸ナトリウム水溶液を分散媒に用いて体積基準で測定したところ、2.2μmであった。この粉砕珪石粉100質量部に対して、常法により4質量部のγ-メタクリロイルオキシプロピルトリメトキシシランで表面処理を行い、シラン処理珪石粉を得た。
無機フィラー3:シラン処理バリウムガラス粉、屈折率:1.55
バリウムガラス(エステック社製、商品コード「E-3000」)をボールミルで粉砕し、バリウムガラス粉を得た。得られたバリウムガラス粉の平均粒子径をレーザー回折式粒度分布測定装置(株式会社島津製作所製、型式「SALD-2300」)を用いて0.2%ヘキサメタリン酸ナトリウム水溶液を分散媒に用いて体積基準で測定したところ、2.4μmであった。このバリウムガラス粉100質量部に対して常法により3質量部のγ-メタクリロイルオキシプロピルトリメトキシシランで表面処理を行い、シラン処理バリウムガラス粉を得た。
無機フィラー4:シラン処理バリウムガラス粉、屈折率:1.53
8235 UF0.7グレード(SCHOTT社製バリウムガラス、平均粒子径:0.7μm)100g、γ-メタクリロイルオキシプロピルトリメトキシシラン6g、及び0.3質量%酢酸水溶液200mLを三口フラスコに入れ、2時間、室温下で撹拌した。凍結乾燥により水を除去した後、80℃で5時間加熱処理を行い、無機フィラー4を得た。
無機フィラー5:シラン処理バリウムガラス粉、屈折率:1.53
GM27884 NF180グレード(SCHOTT社製バリウムガラス、平均粒子径:0.18μm)100g、γ-メタクリロイルオキシプロピルトリメトキシシラン13g、及び0.3質量%酢酸水溶液200mLを三口フラスコに入れ、2時間、室温下で撹拌した。凍結乾燥により水を除去した後、80℃で5時間加熱処理を行い、無機フィラー5を得た。
DABE:4-(N,N-ジメチルアミノ)安息香酸エチル
BHT:2,6-ジ-t-ブチル-4-メチルフェノール(安定剤(重合禁止剤))
<実施例1~12及び比較例1~2>
前記した成分を用いて、表1に記載の各成分を常温下で混合及び混練することにより、実施例1~10の歯科用コンポジットレジン、実施例11~12の自己接着性歯科用コンポジットレジン、及び比較例1~2の歯科用コンポジットレジンのペースト(組成物)を調製した。次いで、これらのペーストを用い、後述の方法に従って、硬化深度、重合収縮応力、曲げ強さ、及び硬化前のペーストの光拡散度Dを測定した。表1に、各実施例及び比較例の歯科用コンポジットレジンの配合比(質量部)及び試験結果を示す。
各実施例及び比較例の歯科用コンポジットレジンのペーストをステンレス製の金型(厚さ10mm、直径2mm)に充填した。上下面をフィルム、スライドガラスの順で重ね圧接し、片面からガラス板を外したフィルムの圧接面から歯科用LED光照射器(株式会社モリタ製、「ペンキュアー2000」)で、10秒光照射して硬化させた。硬化物を金型から取り出した後、未硬化部分を拭き取り、マイクロメータ(株式会社ミツトヨ製)を用いて光照射面からの硬化深度を測定し、実測値の半分の値を硬化深度とし(N=5)、平均値を算出した。
50μmアルミナパウダーでサンドブラスト処理を施した5.0mm厚ガラス板に離型剤を塗布したステンレス製ワッシャー(内径5.3mm×0.8mm厚)を設置し、ワッシャー内に各実施例及び比較例の歯科用コンポジットレジンのペーストを充填した。次いで、余剰な歯科用コンポジットレジンペーストを除去し、別途サンドブラスト処理を施したステンレス製治具(φ5mm)とガラス板で歯科用コンポジットレジンペーストを挟み込んだ。
ISO4049:2009に準拠して曲げ試験により強度を評価した。具体的には以下のとおりである。歯科用コンポジットレジンのペーストをSUS製の金型(縦2mm×横25mm×厚さ2mm)に充填し、ペースト(歯科用組成物)の上下(2mm×25mmの面)をスライドガラスで圧接した。次いで、歯科用LED光照射器(株式会社モリタ製、「ペンキュアー2000」)で、スライドガラス越しに10秒間ずつ片面5箇所でペーストの裏表に光照射して歯科用組成物を硬化させた。得られた硬化物について、万能試験機(オートグラフAG-I 100kN、株式会社島津製作所製)を用いて、クロスヘッドスピード1mm/分で曲げ試験を実施し、曲げ強さを測定し(N=5)、平均値を算出した。
各実施例及び比較例の歯科用コンポジットレジンをテフロン(登録商標)製の金型(直径30mm×厚さ0.25mm)に充填した。上下面をスライドガラスで圧接し、三次元変角光度計(株式会社村上色彩技術研究所製「GP-200」、ハロゲン光源、色温度約6774K)を用いて、透過光の光度分布を測定した(N=3)。光拡散度Dは、下記式〔I〕に従って計算し、得られた光拡散度Dの平均値を算出した。
D=(I20/cos20°+I70/cos70°)/(2I0) 〔I〕
(式中、Iは試料を透過した光の光度を表し、I0、I20及びI70は試料板に垂直な方向(光の入射方向)に対する、零度、20度、70度方向の光度(光の強さ)をそれぞれ表す。)
硬化前の全単量体混合物の屈折率測定は直接アッベ屈折率計(株式会社アタゴ製、商品名:1T)を用いて23℃下で行った。硬化前の全単量体混合物をアッベ屈折率計にセットし、屈折率を測定した。
1 試料板
L1 入射光
L0 透過光
I0 光の入射方向に対して零度の角度への透過光
I20 光の入射方向に対して20度の角度への透過光
I70 光の入射方向に対して70度の角度への透過光
Claims (18)
- 単量体(A)、重合開始剤(B)、ポリマー粒子(C)、及びフィラー(D)(ポリマー粒子(C)を除く)を含有し、硬化前の歯科用組成物について下記式〔I〕で示される光拡散度Dが0.10以上である、歯科用組成物。
D=(I20/cos20°+I70/cos70°)/(2I0) 〔I〕
(式中、Iは試料を透過した光の光度を表し、I0、I20及びI70は試料板に垂直な方向(光の入射方向)に対する、零度、20度、70度方向の光度(光の強さ)をそれぞれ表す。) - 前記ポリマー粒子(C)の平均粒子径が0.5μm~50μmである、請求項1に記載の歯科用組成物。
- 前記フィラー(D)が無機フィラーである、請求項1又は2に記載の歯科用組成物。
- 前記ポリマー粒子(C)が架橋ポリマー粒子である、請求項1~3のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)の屈折率が1.550以上である、請求項1~4のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)の含有量が歯科用組成物100質量部中0.1質量部~20質量部である、請求項1~5のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)の含有量が単量体成分の全量100質量部に対して、0.1質量部以上50質量部以下である、請求項1~6のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)が球状である、請求項1~7のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)と硬化前の全単量体混合物との屈折率差が0.020以上である、請求項1~8のいずれか1項に記載の歯科用組成物。
- 前記ポリマー粒子(C)が(メタ)アクリルポリマー粒子又はスチレンポリマー粒子からなる、請求項1~9のいずれか1項に記載の歯科用組成物。
- 前記単量体(A)が酸性基を有する単量体(A-1)を含む、請求項1~10のいずれか1項に記載の歯科用組成物。
- 前記単量体(A)が、酸性基を有しない疎水性単量体(A-2)を含む、請求項1~11のいずれか1項に記載の歯科用組成物。
- 前記重合開始剤(B)が、非水溶性光重合開始剤(B-2)を含む、請求項1~12のいずれか1項に記載の歯科用組成物。
- 前記フィラー(D)が、平均粒子径が1nm以上0.1μm未満の超微粒子無機フィラーを含む、請求項1~13のいずれか1項に記載の歯科用組成物。
- 前記フィラー(D)が、平均粒子径が1μm超10μm以下の無機フィラーを含む、請求項1~13のいずれか1項に記載の歯科用組成物。
- 請求項1~15のいずれか1項に記載の歯科用組成物からなる、歯科用コンポジットレジン。
- 請求項1~15のいずれか1項に記載の歯科用組成物からなる、自己接着性歯科用コンポジットレジン。
- 請求項1~15のいずれか1項に記載の歯科用組成物からなる、歯科用セメント。
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