WO2021131476A1 - 歯科用硬化性組成物 - Google Patents
歯科用硬化性組成物 Download PDFInfo
- Publication number
- WO2021131476A1 WO2021131476A1 PCT/JP2020/043971 JP2020043971W WO2021131476A1 WO 2021131476 A1 WO2021131476 A1 WO 2021131476A1 JP 2020043971 W JP2020043971 W JP 2020043971W WO 2021131476 A1 WO2021131476 A1 WO 2021131476A1
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- WO
- WIPO (PCT)
- Prior art keywords
- organic
- inorganic composite
- inorganic
- filler
- composite filler
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 97
- 239000002131 composite material Substances 0.000 claims abstract description 196
- 239000000945 filler Substances 0.000 claims abstract description 172
- 239000002245 particle Substances 0.000 claims abstract description 149
- 239000000178 monomer Substances 0.000 claims abstract description 68
- 239000011148 porous material Substances 0.000 claims abstract description 55
- 239000011256 inorganic filler Substances 0.000 claims abstract description 51
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 51
- 239000003505 polymerization initiator Substances 0.000 claims abstract description 27
- 239000011164 primary particle Substances 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 40
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
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- 238000004898 kneading Methods 0.000 description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 18
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000003960 organic solvent Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 238000002156 mixing Methods 0.000 description 12
- -1 6-hydroxyhexyl Chemical group 0.000 description 11
- 238000006116 polymerization reaction Methods 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
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- 230000002378 acidificating effect Effects 0.000 description 6
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- 150000001451 organic peroxides Chemical class 0.000 description 6
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
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- 239000007788 liquid Substances 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
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- 238000012360 testing method Methods 0.000 description 5
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 4
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- 239000000377 silicon dioxide Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
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- 238000001035 drying Methods 0.000 description 3
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- 229920001155 polypropylene Polymers 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- 238000003980 solgel method Methods 0.000 description 3
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 2
- QZTORBFYQVRJKY-UHFFFAOYSA-N [2-hydroxy-3-[2-[2-[2-[2-hydroxy-3-(2-methylprop-2-enoyloxy)propoxy]phenyl]propan-2-yl]phenoxy]propyl] 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(O)COC1=CC=CC=C1C(C)(C)C1=CC=CC=C1OCC(O)COC(=O)C(C)=C QZTORBFYQVRJKY-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- JEHKKBHWRAXMCH-UHFFFAOYSA-N benzenesulfinic acid Chemical compound O[S@@](=O)C1=CC=CC=C1 JEHKKBHWRAXMCH-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
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- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
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- MXBHZLBILICSRF-UHFFFAOYSA-N (4-methyl-3-oxopent-4-enyl) N-[2,3-dimethyl-7-[(4-methyl-3-oxopent-4-enoxy)carbonylamino]heptan-2-yl]carbamate Chemical compound C(C(=C)C)(=O)CCOC(=O)NC(C(CCCCNC(=O)OCCC(C(=C)C)=O)C)(C)C MXBHZLBILICSRF-UHFFFAOYSA-N 0.000 description 1
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 description 1
- UEKHZPDUBLCUHN-UHFFFAOYSA-N 2-[[3,5,5-trimethyl-6-[2-(2-methylprop-2-enoyloxy)ethoxycarbonylamino]hexyl]carbamoyloxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOC(=O)NCCC(C)CC(C)(C)CNC(=O)OCCOC(=O)C(C)=C UEKHZPDUBLCUHN-UHFFFAOYSA-N 0.000 description 1
- KIWRLBQZUHYWJI-UHFFFAOYSA-N 2-[hydroxy(phenoxy)phosphoryl]oxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOP(=O)(O)OC1=CC=CC=C1 KIWRLBQZUHYWJI-UHFFFAOYSA-N 0.000 description 1
- DILXLMRYFWFBGR-UHFFFAOYSA-N 2-formylbenzene-1,4-disulfonic acid Chemical compound OS(=O)(=O)C1=CC=C(S(O)(=O)=O)C(C=O)=C1 DILXLMRYFWFBGR-UHFFFAOYSA-N 0.000 description 1
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- ZKFOEDSYSPDTEB-UHFFFAOYSA-N 2-prop-2-enoyloxybenzoic acid Chemical compound OC(=O)C1=CC=CC=C1OC(=O)C=C ZKFOEDSYSPDTEB-UHFFFAOYSA-N 0.000 description 1
- YFLAJEAQOBRXIK-UHFFFAOYSA-N 2-prop-2-enoyloxyethylphosphonic acid Chemical compound OP(O)(=O)CCOC(=O)C=C YFLAJEAQOBRXIK-UHFFFAOYSA-N 0.000 description 1
- QOXOZONBQWIKDA-UHFFFAOYSA-N 3-hydroxypropyl Chemical group [CH2]CCO QOXOZONBQWIKDA-UHFFFAOYSA-N 0.000 description 1
- JTEUUUADXRPGAJ-UHFFFAOYSA-N 4-amino-2-prop-2-enoylbenzoic acid Chemical compound NC1=CC=C(C(O)=O)C(C(=O)C=C)=C1 JTEUUUADXRPGAJ-UHFFFAOYSA-N 0.000 description 1
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 1
- HTKIZIQFMHVTRJ-UHFFFAOYSA-N 5-butyl-1,3-diazinane-2,4,6-trione Chemical compound CCCCC1C(=O)NC(=O)NC1=O HTKIZIQFMHVTRJ-UHFFFAOYSA-N 0.000 description 1
- SAPGBCWOQLHKKZ-UHFFFAOYSA-N 6-(2-methylprop-2-enoyloxy)hexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCCCOC(=O)C(C)=C SAPGBCWOQLHKKZ-UHFFFAOYSA-N 0.000 description 1
- YJVIKVWFGPLAFS-UHFFFAOYSA-N 9-(2-methylprop-2-enoyloxy)nonyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCCCCCCOC(=O)C(C)=C YJVIKVWFGPLAFS-UHFFFAOYSA-N 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 239000005749 Copper compound Substances 0.000 description 1
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical class C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- 244000028419 Styrax benzoin Species 0.000 description 1
- 235000000126 Styrax benzoin Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000008411 Sumatra benzointree Nutrition 0.000 description 1
- ULQMPOIOSDXIGC-UHFFFAOYSA-N [2,2-dimethyl-3-(2-methylprop-2-enoyloxy)propyl] 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(C)(C)COC(=O)C(C)=C ULQMPOIOSDXIGC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- HNYOPLTXPVRDBG-UHFFFAOYSA-N barbituric acid Chemical compound O=C1CC(=O)NC(=O)N1 HNYOPLTXPVRDBG-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229960002130 benzoin Drugs 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000001880 copper compounds Chemical class 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000003479 dental cement Substances 0.000 description 1
- ISAOCJYIOMOJEB-UHFFFAOYSA-N desyl alcohol Natural products C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 1
- 239000012933 diacyl peroxide Substances 0.000 description 1
- 125000005520 diaryliodonium group Chemical group 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
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 150000002366 halogen compounds Chemical class 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
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011242 organic-inorganic particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000013001 point bending Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 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
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- ZSDSQXJSNMTJDA-UHFFFAOYSA-N trifluralin Chemical compound CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O ZSDSQXJSNMTJDA-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
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
-
- 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
- A61K6/15—Compositions characterised by their physical properties
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
- A61K6/62—Photochemical radical initiators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
- A61K6/76—Fillers comprising silicon-containing compounds
-
- 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
- A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
- A61K6/853—Silicates
-
- 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
- A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
- A61K6/878—Zirconium oxide
-
- 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
- A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
- A61K6/882—Carbides
-
- 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
Definitions
- the present invention relates to a dental curable composition containing an organic-inorganic composite filler.
- the dental curable composition is generally a paste-like composition containing a polymerizable monomer (monomer), a filler, and a polymerization initiator as main components, and the type, shape, particle size, and filling amount of the filler to be used. Etc. affect the operability of the dental curable composition, the aesthetics of the cured product obtained by curing, the mechanical strength, and the like.
- an inorganic filler having a large particle size when added to a dental curable composition, the mechanical strength of the cured product is increased, but the surface smoothness and abrasion resistance of the cured product are reduced, resulting in natural teeth. It becomes difficult to obtain a glossy finished surface similar to the above.
- a fine inorganic filler having an average particle size of 1 ⁇ m or less is blended in the dental curable composition, the surface smoothness and abrasion resistance of the cured product can be improved, but the fine inorganic filler can be improved. Due to its large specific surface area, the viscosity of the dental curable composition is greatly increased.
- the dentist needs to adjust the dental curable composition to a consistency suitable for use in the oral cavity, and in order to reduce the consistency, the amount of the fine inorganic filler is added. If it is reduced, the operability during treatment may be lowered, the polymerization shrinkage rate when the dental curable composition is cured may be increased, and the mechanical strength of the obtained cured product may be decreased.
- the organic-inorganic composite filler is a composite filler containing a fine inorganic filler in an organic resin, and by using this, it is possible to maintain excellent surface smoothness and wear resistance when the fine inorganic filler is used. It is also possible to reduce the polymerization shrinkage rate. If the blending amount of the organic-inorganic composite filler is too large, the paste will be rough and the operability of the paste will be deteriorated. However, the inorganic filler (inorganic) having an average particle size of 0.1 to 1 ⁇ m. When used in combination with particles), the above-mentioned deterioration in operability can be prevented, and a paste-like dental curable composition having excellent operability can be obtained (see, for example, Patent Document 2).
- the above-mentioned organic-inorganic composite filler As a method for producing the above-mentioned organic-inorganic composite filler, a method of polymerizing a curable composition in which a fine inorganic filler and a polymerizable monomer are kneaded in advance to obtain a cured product, and then pulverizing the cured product is common. Is the target.
- the composition containing the organic-inorganic composite filler produced by this method has a problem of low strength as a dental curable composition because the bond between the matrix and the organic-inorganic composite filler is weak. ..
- the pore volume (volume of pores having a pore diameter in the range of 1 to 500 nm) measured by the mercury intrusion method is 0.01 to 0.30 cm 3 / g.
- An organic-inorganic composite filler having an agglomeration gap (hereinafter, also referred to as “porous organic-inorganic composite filler”) has been proposed (see, for example, Patent Document 3). Further, in Patent Document 3, the dental curable composition containing such a porous organic-inorganic composite filler, a polymerizable monomer, and a polymerization initiator has good paste operability and a polymerization shrinkage rate.
- the porous structure is porous due to the anchor effect generated by the polymerized monomer invading the cohesive gap due to the capillary phenomenon and then curing. It is explained that the organic-organic-inorganic composite filler is held in the cured product with a high fitting force, so that the mechanical strength is improved.
- Dental curability in which a porous organic-inorganic composite filler produced by the present inventors according to the method disclosed in Patent Document 3 and an inorganic filler having an average particle size of 0.1 to 1 ⁇ m are used in combination.
- the desired effect that is, the effect of suppressing the dryness of the paste state and providing a cured product having excellent mechanical strength, abrasion resistance, and aesthetics can be obtained.
- stickiness may occur in the paste state and the operability may be deteriorated, and such a phenomenon is particularly noticeably observed after long-term storage, and the occlusion formed when filling the molar tooth class I cavity or the like.
- the present invention provides a cured product having high mechanical strength, has good operability and morphological retention in a paste state before curing, and maintains good operability for a long period of time. It is an object of the present invention to provide a dental curable composition which can be produced.
- the present inventors have a dental curable composition in which a porous organic-inorganic composite filler disclosed in Patent Document 3 and an inorganic filler having an average particle size of 0.1 to 1 ⁇ m are used in combination.
- the preparation conditions of the product were examined.
- the operability of the paste is significantly improved, and even after long-term storage, it is good immediately after preparation. It became clear that operability may be maintained.
- the dental curable composition according to the present invention is a polymerizable monomer (A); an inorganic filler (B) having an average particle size of 0.1 to 1 ⁇ m; an inorganic filler having an average particle size of 10 to 1000 nm. It is composed of organic-inorganic composite agglomerated particles containing an agglomerated structure in which primary particles are bonded to each other so as to form voids through a resin layer covering at least a part of the surface of the inorganic primary particles, and is fine as measured by a nitrogen adsorption method.
- An organic-inorganic composite filler (C) having a total pore volume of 0.01 to 0.30 cm 3 / g and an average particle size of 10 to 100 ⁇ m;
- the organic-inorganic composite filler (C) containing the polymerization initiator (D); has a curved surface shape organic-inorganic composite filler (C1) composed of organic-inorganic composite aggregated particles having a curved surface shape, and an amorphous shape including an edge portion.
- the content of the curved organic-inorganic composite filler (C1) in the entire organic-inorganic composite filler (C), which is composed of an amorphous organic-inorganic composite filler (C2) composed of organic-inorganic composite agglomerated particles having (C1 + C2) ⁇ is an organic-inorganic composite having a curved surface shape that constitutes the curved surface-shaped organic-inorganic composite filler (C1) having a particle diameter of 5 ⁇ m or more, which accounts for the total number of the organic-inorganic composite aggregated particles having a particle diameter of 5 ⁇ m or more. It is 0.2 to 0.8 in terms of the ratio of the total number of agglomerated particles.
- the dental curable composition according to the present invention provides a cured product having less polymerization shrinkage and excellent mechanical strength, abrasion resistance, and aesthetics due to the use of the porous organic-inorganic composite filler. Not only does it have the effect of being able to do this, but it also suppresses the stickiness of the paste state, and it can maintain excellent operability for a long period of time without stickiness and deterioration of operability even after long-term storage. It has an excellent feature that it has good retention.
- the dental curable composition according to the present embodiment is a polymerizable monomer (A); an inorganic filler (B) having an average particle size of 0.1 to 1 ⁇ m; an inorganic primary having an average particle size of 10 to 1000 nm. It is composed of organic-inorganic composite agglomerated particles containing an agglomerated structure in which the particles are bonded to each other so as to form voids through a resin layer covering at least a part of the surface of the inorganic primary particles, and the pore diameter measured by the nitrogen adsorption method.
- Organic-inorganic composite filler (C) with a total pore volume in the range of 1 to 500 nm of 0.01 to 0.30 cm 3 / g and an average particle size of 10 to 100 ⁇ m; and polymerization.
- the organic-inorganic composite filler (C) containing the initiator (D); has a curved surface-shaped organic-inorganic composite filler (C1) composed of organic-inorganic composite agglomerated particles having a curved surface shape, and an amorphous shape including an edge portion.
- the dental curable composition according to the present embodiment includes an organic-inorganic composite filler (C) corresponding to the porous organic-inorganic composite filler disclosed in Patent Document 3 and an inorganic filler having an average particle size of 0.1 to 1 ⁇ m. It solves the problem in the dental curable composition using (B) and (B) in combination, and contains two kinds of organic-inorganic composite aggregated particles having different shapes in a specific ratio as the organic-inorganic composite filler (C). It has the greatest feature in that it is made of a mixture that is used.
- the organic-inorganic composite filler (C) corresponds to the porous organic-inorganic composite filler disclosed in Patent Document 3, but in the dental curable composition according to the present embodiment, the organic-inorganic composite filler Since the shape of the organic-inorganic composite aggregated particles constituting (C) is important, the organic-inorganic composite filler (C) is described as an aggregate of the organic-inorganic composite aggregated particles. Further, in Patent Document 3, the total pore volume of pores having a pore diameter in the range of 1 to 500 nm is measured by a mercury intrusion method, but in the present embodiment, it is necessary to use mercury which requires careful handling.
- the pore volume obtained by calculating the pore size distribution by the BJH method from the isotherm adsorption curve measured by the BET method by nitrogen adsorption, which was measured by the nitrogen adsorption method without mercury, is adopted. This is because the total pore volume of pores having a pore diameter in the range of 1 to 500 nm can be measured by the nitrogen adsorption method, and according to the study by the present inventors, the pore diameter is in the range of 1 to 500 nm.
- the pores have an extremely sharp pore distribution with a peak near the pore diameter of 50 nm, and the pore diameter is less than 1 nm, which is difficult to measure by the mercury intrusion method, and the pore diameter is more than 500 nm, which is difficult to measure by the nitrogen adsorption method. This is because it was confirmed that the pores of the above were substantially nonexistent.
- the polymerization initiator (D) are not particularly different from the conventional dental curable compositions, for example, the dental curable compositions described in Patent Documents 3 and 2, but the following describes: Including these components, each component in the dental curable composition according to the present embodiment will be described.
- the notation "x to y" using the numerical values x and y means “x or more and y or less”.
- the unit shall be applied to the numerical value x as well.
- the term “(meth) acrylic” means both “acrylic” and “methacryl”.
- the term “(meth) acrylate” means both “acrylate” and “methacrylate”
- the term “(meth) acryloyl” means both “acryloyl” and “methacryloyl”. ..
- a polymerizable monomer such as a radically polymerizable monomer or a cationically polymerizable monomer used in a conventional dental curable composition can be used without particular limitation.
- widely used (meth) acrylate-based polymerizable monomers specifically, acidic group-containing (meth) acrylate-based polymerizable monomers, hydroxyl group-containing (meth) acrylate-based polymerizable monomers, and acidic groups. It is preferable to use a monofunctional or polyfunctional (meth) acrylate-based polymerizable monomer having no hydroxyl group.
- Examples of the acidic group-containing (meth) acrylate-based polymerizable monomer include (meth) acrylic acid, N- (meth) acryloyl-p-aminobenzoic acid, 2- (meth) acryloyloxybenzoic acid, and 2-(. Examples thereof include meta) acryloyloxyethyl phenyl hydrogen phosphate and 2- (meth) acryloyloxyethyl phosphonic acid.
- hydroxyl group-containing (meth) acrylate-based polymerizable monomer examples include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxyhexyl (meth).
- Examples of the monofunctional or polyfunctional (meth) acrylate-based polymerizable monomer having no acidic group and hydroxyl group include methyl (meth) acrylate, ethyl (meth) acrylate, triethylene glycol dimethacrylate, and tetraethylene glycol. Examples thereof include dimethacrylate, neopentyl glycol dimethacrylate, 1,6-hexanediol dimethacrylate, 1,9-nonanediol dimethacrylate, and 1,6-bis (methacrylethyloxycarbonylamino) trimethylhexane.
- a plurality of types of these (meth) acrylate-based polymerizable monomers may be used in combination.
- a polyfunctional (meth) acrylate-based polymerizable monomer having no acidic group or hydroxyl group is made acidic as necessary. It is preferable to mix and use a monofunctional (meth) acrylate-based monomer having no group and a hydroxyl group, a hydroxyl group-containing (meth) acrylate-based polymerizable monomer, and the like.
- the average particle size is 0.1 to 0 or more from the viewpoint of suppressing the dryness of the paste and improving the abrasiveness, abrasion resistance, and mechanical strength of the cured product.
- a 1.0 ⁇ m inorganic filler (B) is blended.
- the average particle size of the inorganic filler (B) is preferably 0.15 to 0.7 ⁇ m. If the average particle size of the inorganic filler (B) becomes too small, the operability of the paste before curing of the dental curable composition tends to decrease, and the mechanical strength of the cured product tends to decrease. On the other hand, if the average particle size of the inorganic filler (B) becomes too large, it tends to be difficult to obtain the gloss after polishing of the cured product of the dental curable composition.
- the material of the inorganic filler (B) is not particularly limited, and those used as the filler for the dental restoration material can be used without particular limitation.
- Typical inorganic filler materials include metal oxides such as quartz, silica, alumina, silica titania, silica zirconia, lantern glass, barium glass, and strontium glass; silicate glass, fluoroaluminosilicate glass, and the like. Can be done. Among these, those having a refractive index in the range of 1.4 to 1.7 are preferably used. Further, from the viewpoint of surface smoothness of the cured product, it is preferable to use a spherical inorganic filler.
- the inorganic filler (B) is methyltrimethoxysilane, vinyltriethoxysilane, or ⁇ -methacryloyl because it can improve the compatibility with the polymerizable monomer and improve the mechanical strength and water resistance. It is preferable to surface-treat with a silane coupling agent such as oxypropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, and hexamethyldisilazane.
- the range of the overall average particle size may be within the above-mentioned range, and a plurality of inorganic fillers having different particle size ranges, average particle sizes, refractive indexes, and materials may be used in combination.
- Organic-inorganic composite filler (C) is an aggregation in which inorganic primary particles having an average particle size of 10 to 1000 nm are bonded to each other so as to form voids through a resin layer covering at least a part of the surface of the inorganic primary particles. It is composed of organic-inorganic composite agglomerated particles containing a structure, and the total pore volume of pores having a pore diameter in the range of 1 to 500 nm is 0.01 to 0.30 cm 3 / g and is measured by a nitrogen adsorption method. , An organic-inorganic composite filler having an average particle size of 10 to 100 ⁇ m.
- the pore diameter of the pores forming the agglomeration gap means the median pore diameter obtained based on the pore volume distribution in the pores having a pore diameter in the range of 1 to 500 nm measured by the nitrogen adsorption method.
- the organic-inorganic composite filler (C) the total pore volume of the pores having a pore diameter in the range of 3 to 300 nm, particularly 10 to 200 nm, measured by the nitrogen adsorption method is 0.03 to 0.20 cm 3 It is preferable to use one having / g.
- the organic-inorganic composite filler (C) corresponds to the porous organic-inorganic composite filler disclosed in Patent Document 3, and has a structure as schematically shown in FIG. 1 of Patent Document 3. It is also common that it is composed of organic-inorganic composite agglomerated particles. However, it differs from the porous organic-inorganic composite filler specifically disclosed in Patent Document 3 in that two kinds of organic-inorganic composite agglomerated particles having different shapes are contained in a specific ratio.
- the inorganic agglomerated particles obtained by treating the inorganic primary particles having an average particle diameter of 10 to 1000 nm with a silane coupling agent and then spray-drying the inorganic agglomerated particles are obtained by using a polymerizable monomer and the inorganic agglomerated particles.
- a porous organic-inorganic composite filler is obtained by immersing the polymerization initiator in a solution dissolved in an organic solvent, removing the organic solvent, and then polymerizing and curing the mixture.
- the inorganic agglomerated particles are usually considered to be spherical, substantially spherical, donut-shaped, or so-called torus-shaped particles having dents formed on the surface of the particles, and are finally obtained porous organic inorganic particles.
- the composite filler is also said to have a shape corresponding to the shape of the inorganic agglomerated particles. And this has been confirmed in the examination by the present inventors. Therefore, although it is conceivable that a small part of the porous organic-inorganic composite filler used in Patent Document 3 is crushed and the shape is changed during the operation process, the organic-inorganic composite agglomerated particles constituting the porous organic-inorganic composite filler are considered to be changed in shape.
- a curved surface having a curved surface whose main outer surface is composed of curved surfaces is a curved surface having a curved surface whose main outer surface is composed of curved surfaces.
- the main outer surface means the outer surface when the whole is viewed as one particle without considering the microstructure such as the openings and the inside of the pores, and the curved surface shape is the main part of the outer surface.
- 70% or more, preferably 80% or more, more preferably 90% or more means a spherical, substantially spherical, torus-like shape composed of a smooth curved surface.
- the present inventors have a polymerizable monomer (A), an inorganic filler (B), an organic-inorganic composite filler (C) composed of a porous organic-inorganic composite filler produced by the method disclosed in Patent Document 3, and polymerization.
- a polymerizable monomer (A) By mixing the initiator (D) and kneading under different conditions, a plurality of paste-like dental curable compositions having different kneading conditions were prepared, and their characteristics were examined.
- the kneading conditions are strict (strong and long), the operability and formability of the obtained paste after long-term storage are improved, and the paste kneaded under such conditions.
- the organic-inorganic composite filler (C) includes a curved organic-inorganic composite filler (C1) composed of organic-inorganic composite aggregate particles having a curved shape and an edge portion.
- / (C1 + C2) ⁇ is an organic-inorganic composite aggregate particle having a curved surface shape constituting a curved surface-shaped organic-inorganic composite filler (C1) having a particle diameter of 5 ⁇ m or more, which accounts for the total number of organic-inorganic composite aggregate particles having a particle diameter of 5 ⁇ m or more. It should be 0.2 to 0.8 as a ratio of the total number of. If the content is below the lower limit, the paste will become dry when stored for a long period of time. Further, when the content rate exceeds the upper limit value, the stickiness of the paste is large and the morphological retention property is deteriorated.
- the content rate ⁇ C1 / (C1 + C2) ⁇ is preferably 0.3 to 0.7, and more preferably 0.3 to 0.6, from the viewpoint of effect.
- the curved surface-shaped organic-inorganic composite filler (C1) corresponds to the porous organic-inorganic composite filler obtained by the method described in Patent Document 3, and is an amorphous organic-inorganic composite filler (C2).
- an amorphous organic-inorganic composite filler (C2) can be produced by pulverizing a curved organic-inorganic composite filler (C1) using a vibrating ball mill, a bead mill, a jet mill, or the like.
- the porous organic-inorganic composite filler thus obtained by the method described in Patent Document 3 is crushed by a kneading operation at the time of preparing the dental curable composition to obtain an amorphous organic-inorganic composite filler (C2).
- the production rate can be controlled by the kneading conditions.
- the relationship between the kneading condition and the production rate is investigated in advance, and the actual kneading is performed by adopting the condition that gives the production rate having a predetermined content rate ⁇ C1 / (C1 + C2) ⁇ based on the relationship.
- a dental curable composition having the above-mentioned predetermined content can be prepared.
- the content rate can be controlled by using a change in paste viscosity or hardness during preparation of the dental curable composition as an index.
- a change in paste viscosity or hardness during preparation of the dental curable composition is controlled by using a change in paste viscosity or hardness during preparation of the dental curable composition as an index.
- a mechanical kneading device such as a planetary mixer
- the curved organic-inorganic composite filler (C1) is obtained by the kneading operation.
- a part of the paste is crushed into an indefinite shape, and the paste viscosity and hardness increase according to the kneading time.
- all of the curved organic-inorganic composite filler (C1) is not crushed and reaches saturation and is kneaded.
- the above kneading is performed using a small amount of the polymerizable monomer (A), and the end point is when the rate of change in paste viscosity or hardness is less than 10%, and then the remaining polymerizable monomer.
- the curved organic-inorganic filler is used as a kneading method and kneading conditions.
- the content of the mixed filler used as a raw material ⁇ C1 / (C1 + C2) ⁇ is substantially a dental curable composition. It becomes the content rate in.
- the average particle size (particle size) of the organic-inorganic composite filler (C) may be 10 to 100 ⁇ m, preferably 10 to 70 ⁇ m. If the average particle size of the organic-inorganic composite filler (C) is too small, the filler filling rate in the dental curable composition decreases, resulting in a decrease in mechanical strength and a decrease in operability due to stickiness. Further, if the average particle size of the organic-inorganic composite filler (C) is too large, the paste becomes dry and the operability is deteriorated.
- the average particle size is the median size obtained based on the particle size distribution by the laser diffraction-scattering method. Specifically, for a sample prepared uniformly by dispersing 0.1 g of an organic-inorganic composite filler in 10 mL of ethanol. It is what is measured.
- the average particle size is the average particle size of the organic-inorganic composite filler (C), and the average particle size of the curved organic-inorganic composite filler (C1) and the amorphous organic-inorganic composite filler (C2). It depends on the average particle size and the blending ratio of these fillers. Since the amorphous organic-inorganic composite filler (C2) is also a crushed product of the curved surface-shaped organic-inorganic composite filler (C1), its average particle size is larger than the average particle size of the curved surface-shaped organic-inorganic composite filler (C1) before crushing. It is small, usually about half that size.
- the average particle size is larger than the above range (for example, 20 to 150 ⁇ m), the average after kneading is used.
- the particle size can be in the above range.
- a mixed filler in which a curved organic-inorganic composite filler (C1) and an amorphous organic-inorganic composite filler (C2) are blended in a specific ratio, kneading conditions such that crushing during kneading hardly occurs.
- a curved organic-inorganic composite filler (C1) and an amorphous organic-inorganic composite filler (C1) having particle sizes such that the overall average particle size is within the above range according to a preset content rate. C2) may be used.
- the shape of the organic-inorganic composite agglomerated particles constituting the curved surface-shaped organic-inorganic composite filler (C1) and the shape of the organic-inorganic composite agglomerated particles constituting the amorphous organic-inorganic composite filler (C2) can be confirmed by electron microscope observation. it can.
- the content of the above ⁇ C1 / (C1 + C2) ⁇ is also the inorganic filler (B) and the organic-inorganic composite filler (C) taken out from the dental curable composition (for example, through steps such as filtration, solvent washing, and drying). ), Or by observing the surface (or cross section) of the cured product of the dental curable composition with an electron microscope, the organic-inorganic composite agglomerated particles having a particle diameter of 5 ⁇ m or more are counted while classifying their shapes. Can be decided.
- the particle size of the organic-inorganic composite agglomerated particles for determining the content ⁇ C1 / (C1 + C2) ⁇ is set to 5 ⁇ m or more because the shape can be easily determined by electron microscope observation and the particle size is 5 ⁇ m. The reason is that the amount of organic-inorganic composite agglomerated particles less than is small, and the effect on the true content and effect (when all particles can be counted) is extremely small.
- the curved surface-shaped organic-inorganic composite filler (C1) is not particularly different from the porous organic-inorganic composite filler described in Patent Document 3 except for the method of estimating the pore volume and the above points, and the manufacturing method thereof is also patented. There is no particular difference from the method described in 3.
- the inorganic primary particles are composed of inorganic oxides such as amorphous silica, silica-zirconia, silica-titania, silica-titania-barium oxide, silica-titania-zirconia, quartz, alumina, titania, zirconia, and glass.
- inorganic oxides such as amorphous silica, silica-zirconia, silica-titania, silica-titania-barium oxide, silica-titania-zirconia, quartz, alumina, titania, zirconia, and glass.
- silica-based composite oxide particles particularly silica-zirconia particles, are preferable.
- the organic-inorganic composite filler has uniform pores, and the openings thereof are closed by the organic resin phase to prevent air bubbles from being included.
- the average particle size of the inorganic primary particles may be 10 to 1000 nm, preferably 40 to 800 nm, and more preferably 50 to 600 nm.
- the inorganic agglomerated particles obtained by surface-treating such inorganic primary particles with a silane coupling agent and then spray-drying the inorganic primary particles are obtained by dissolving a polymerizable monomer and a polymerization initiator in an organic solvent. By immersing in a monomer solution, removing the organic solvent, and then polymerizing and curing, the inorganic primary particles are bonded to each other so as to form voids through a resin layer that covers the surface of at least a part of the inorganic primary particles.
- the total pore volume of the pores having a pore diameter in the range of 1 to 500 nm is 0.01 to 0.30 cm 3 / g as measured by the nitrogen adsorption method.
- an organic-inorganic composite filler having an average particle size of 10 to 100 ⁇ m can be obtained.
- the same one as the above-mentioned polymerizable monomer (A) can be used, and as the above-mentioned polymerization initiator, the same one as the polymerization initiator (D) described later can be used.
- the organic solvent methanol, ethanol, acetone, dichloromethane and the like can be preferably used.
- the content of the polymerizable monomer in the above-mentioned polymerizable monomer solution is preferably 10 to 50 parts by mass with respect to 100 parts by mass of the organic solvent.
- An ultraviolet absorber, a pigment, a dye, a polymerization inhibitor, or the like may be added to the polymerizable monomer solution.
- Immersion of the above-mentioned polymerizable monomer solution in inorganic agglomerated particles is carried out in such an amount that the amount of the polymerizable monomer is 30 to 500 parts by mass, particularly 50 to 200 parts by mass with respect to 100 parts by mass of the inorganic agglomerated particles.
- Inorganic agglomerated particles may be mixed in the sex monomer solution, and it is preferable to leave the particles for 1 hour or more after mixing.
- the inorganic agglomerated particles are immersed in a polymerizable monomer solution, the solution is filled in the agglomerated gaps of the inorganic agglomerated particles, and then the organic solvent is removed and then polymerization curing is performed to carry out polymerization curing.
- a composite filler (C1) can be obtained. The removal of the organic solvent is preferably carried out until substantially the entire amount (usually 95% by mass or more) of the organic solvent is removed and a visually free-flowing powder is obtained.
- the operation for removing the organic solvent is not particularly limited as long as it is a method capable of such removal, and is dried under reduced pressure of, for example, 0.01 to 50 hPa, particularly 0.1 to 10 hPa, under reduced pressure drying (or vacuum drying). Therefore, it can be preferably performed. Further, the polymerization curing may be carried out by appropriately selecting a suitable method according to the type of the polymerization initiator used.
- the curved surface-shaped organic-inorganic composite filler (C1) thus obtained is separately crushed by the method as described above, or is crushed during kneading using this as a raw material to form an amorphous organic-inorganic composite.
- a filler (C2) can be obtained.
- the polymerization initiator (D) is not particularly limited as long as it has a function of polymerizing the polymerizable monomer (A), but is used for direct dental filling and restoration applications that are often cured in the oral cavity. It is preferable to use a polymerization initiator or a chemical polymerization initiator, and it is more preferable to use a photopolymerization initiator because it does not require a mixing operation and is simple.
- the chemical polymerization initiator a known agent consisting of two or more components and producing a polymerization initiator species (radical) when these components are brought into contact with each other can be used without limitation.
- the chemical polymerization initiator include organic peroxides / amines, organic peroxides / amines / organic sulfinic acids, organic peroxides / amines / arylborates, arylborates / acidic compounds, and barbitur. Examples thereof include those composed of various combinations such as acid derivatives / copper compounds / halogen compounds. Among these, those made of organic peroxides / amines are preferable because they are easy to handle.
- organic peroxides examples include known hydroperoxides, peroxyketals, ketone peroxides, alkylsilyl peroxides, diacyl peroxides, peroxyesters and the like.
- the chemical polymerization initiator composed of an organic peroxide and amines further contains sulfinic acid such as benzenesulfinic acid, p-toluenesulfinic acid and a salt thereof, and barbituric acid such as 5-butylbarbituric acid. Is also a preferred embodiment.
- photopolymerization initiator examples include benzoin alkyl ethers, benzyl ketals, benzophenones, ⁇ -diketones, thioxanson compounds, bisacylphosphine oxides and the like. Reducing agents such as tertiary amines, aldehydes, and sulfur-containing compounds may be added to these photopolymerization initiators. Further, a photoacid generator such as a diaryliodonium salt-based compound, a sulfonium salt-based compound, a sulfonic acid ester compound, a halomethyl-substituted-S-triazine derivative, and a pyridinium salt-based compound may be blended.
- a photoacid generator such as a diaryliodonium salt-based compound, a sulfonium salt-based compound, a sulfonic acid ester compound, a halomethyl-substituted-S-triazine derivative
- polymerization initiators may be used alone, but two or more of them may be mixed and used.
- additives can be added to the dental curable composition according to the present embodiment as long as the effect is not impaired.
- specific examples thereof include a polymerization inhibitor and an ultraviolet absorber.
- a filler having a particle size that is sufficiently smaller than the wavelength of light and does not easily affect the color tone and transparency can be blended.
- the blending amount of the components (A) to (D) in the dental curable composition according to the present embodiment is usually 100 parts by mass of the polymerizable monomer (A) and 50 parts of the inorganic filler (B). ⁇ 350 parts by mass, preferably 100 to 300 parts by mass, organic-inorganic composite filler (C): 50 to 350 parts by mass, preferably 100 to 300 parts by mass, initiator (D): 0.01 to 10 parts by mass, preferably. Is 0.1 to 5 parts by mass.
- the content of the inorganic filler (B) and the organic-inorganic composite filler (C) with respect to 100 parts by mass of the polymerizable monomer (A) is any. Is also preferably 100 to 300 parts by mass, and the total content of the inorganic filler (B) and the organic-inorganic composite filler (C) is 250 to 550 parts by mass.
- the blending ratio of the inorganic filler (B) and the organic-inorganic composite filler (C) may be appropriately determined from the above range in consideration of the viscosity of the dental curable composition and the mechanical strength of the cured product. Good.
- the dental curable composition according to the present embodiment can be prepared by weighing and mixing a predetermined amount of the components (A) to (D). At this time, it is preferable to mix the inorganic filler (B) under the condition that the inorganic filler (B) is dispersed in the polymerizable monomer (A). Further, in order to exhibit the effect of the present invention, the organic-inorganic composite filler (C) having an agglomeration gap is composed of a curved surface-shaped organic-inorganic composite filler (C1) and an amorphous organic-inorganic composite filler (C2). The abundance ratio of both ⁇ C1 / (C1 + C2) ⁇ in the dental curable composition needs to be 0.2 to 0.8.
- the blending ratio of the curved organic-inorganic composite filler (C1) and the amorphous organic-inorganic composite filler (C2) is adjusted so as to satisfy this condition, or the curved organic-inorganic composite filler (C1) is pulverized in the paste. Can be prepared.
- the dental curable composition according to the present embodiment is particularly preferably used as a dental filling restoration material typified by a photocurable composite resin as described above, but is not limited thereto, and is not limited thereto. It can also be used suitably for applications. Examples of its use include dental cement, restoration materials for abutment construction, and the like.
- the number (n: 30 or more), the major axis (Li) which is the maximum diameter of the particles, and the minor axis (Bi) which is the diameter in the direction orthogonal to the major axis are obtained.
- the average uniformity of the inorganic filler was calculated by the following formula.
- a photograph of the washed surface was taken using a scanning electron microscope, and 100 particles having a particle size of 5 ⁇ m or more observed in the unit field of view of the photograph were randomly selected, and the curved organic-inorganic composite filler was not used. The abundance ratio with the standard organic-inorganic composite filler was calculated.
- the morphological retention of the paste of the dental curable composition before curing was evaluated by the following method. First, a paste of a dental curable composition is filled in a hard resin tooth that reproduces a class I cavity (diameter 4 mm, depth 2 mm) in the center of the lower right 6th occlusal surface, and the filled paste is filled with the occlusal surface morphology. Was given. Then, the hard resin tooth filled with the dental curable composition was allowed to stand in an incubator at 50 ° C. for 20 minutes, and it was evaluated whether or not the imparted morphology was retained.
- the cured product was prepared into a 2 x 2 x 25 mm prismatic shape with # 1500 water-resistant abrasive paper, and this sample piece was mounted on a testing machine ("Autograph AG5000D" manufactured by Shimadzu Corporation), and the distance between fulcrums.
- the three-point bending fracture strength was measured at 20 mm and a crosshead speed of 1 mm / min. Then, the bending strength ⁇ B was obtained by the formula shown below, and the average value evaluated for 5 test pieces was taken as the bending strength.
- ⁇ B is the bending strength (Pa)
- P is the load at the time of breaking the test piece (N)
- S is the distance between the fulcrums (m)
- W is the width of the test piece (m)
- B is the thickness of the test piece. (M) is shown respectively.
- the organic-inorganic composite filler was prepared according to Production Examples 1 to 7.
- a spray dryer (spray dryer "NL-5", manufactured by Ohkawara Kakohki Co., Ltd.) that collides with particulate air at the tip of the nozzle to make fine particles is used, and the spray pressure is 0.08 MPa.
- the temperature was set to 230 ° C.
- the spray-dried inorganic powder was vacuum-dried at 120 ° C. for 15 hours to obtain inorganic aggregated particles.
- a polymerizable monomer solution was prepared by mixing AIBN as a polymerization initiator and methanol as an organic solvent with the polymerizable monomer mixed in a predetermined amount ratio, and further, the polymerizable monomer and inorganic aggregation were prepared.
- the inorganic agglomerated particles and the above-mentioned polymerizable monomer solution were mixed so that the particles had a predetermined ratio, and after confirming that the mixture had a slurry-like property, the mixture was allowed to stand for 1 hour.
- ⁇ Manufacturing example 4> The inorganic filler was put into water, and a dispersion liquid in which the inorganic filler was dispersed was obtained using a circulating crusher SC mill. Then, ⁇ -methacryloyloxypropyltrimethoxysilane and acetic acid were added to water and stirred to obtain a uniform solution having a pH of 4. This solution was added to the above inorganic particle dispersion and mixed uniformly. Then, the dispersion liquid was dried by a spray drying method to obtain an inorganic powder.
- a spray dryer (spray dryer “TSR-2W”, manufactured by Sakamoto Giken Co., Ltd.), which is equipped with a disk that rotates at high speed and uses centrifugal force to make fine particles, is used to rotate the disk at 9000 rpm and the drying temperature.
- TSR-2W spray dryer
- the spray-dried inorganic powder was vacuum-dried at 120 ° C. for 15 hours to obtain inorganic aggregated particles.
- AIBN as a polymerization initiator and methanol as an organic solvent are mixed with the polymerizable monomer mixed in a predetermined amount ratio to prepare a polymerizable monomer solution, and further, the polymerizable monomer and the inorganic material are prepared.
- the inorganic agglomerated particles and the above-mentioned polymerizable monomer solution were mixed so that the agglomerated particles had a predetermined ratio, and after confirming that the mixture had a slurry-like property, the mixture was allowed to stand for 1 hour.
- ⁇ Manufacturing example 5> The curved surface-shaped organic-inorganic composite filler produced in Production Example 1 was pulverized with a vibrating ball mill (zirconia ball particle size: 5 mm) to obtain an amorphous organic-inorganic composite filler. Then, the average particle size and pore volume of the obtained organic-inorganic composite filler were measured. The results are shown in Table 1.
- Example 1 CQ (0.20 parts by mass) and DMBE (0.35 parts by mass) were completely dissolved as a polymerization initiator in a polymerizable monomer composed of GMA (60 parts by mass) and 3G (40 parts by mass). After that, the inorganic filler F-4 (200 parts by mass), the curved organic-inorganic composite filler obtained in Production Example 1 (100 parts by mass), and the amorphous organic-inorganic composite filler obtained in Production Example 5 (100 parts by mass) were added.
- a dental curable composition was prepared by blending, mixing each component manually using a dairy pot until uniform, kneading for 20 minutes, and then defoaming. The physical characteristics of the obtained dental curable composition were evaluated based on the above method. The results are shown in Table 3.
- Examples 2 to 9 Comparative Examples 1 to 5> According to the composition (part by mass) shown in Table 2, dental curable compositions of Examples 2 to 9 and Comparative Examples 1 to 5 were prepared in the same manner as in Example 1, and their physical characteristics were evaluated. The results are shown in Table 3.
- a polymerizable monomer mixture was prepared.
- An inorganic filler (200 parts by mass) and a curved organic-inorganic composite filler (200 parts by mass) are added to this polymerizable monomer mixture (80 parts by mass) with the composition shown in Table 2, and a planetary motion stirrer planetary.
- the curved surface-shaped organic-inorganic material is prepared in the step of preparing the dental curable composition.
- the initial effect was obtained by crushing the composite filler and setting the abundance ratio to less than 0.8.
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Abstract
Description
重合性単量体(A)としては、従来の歯科用硬化性組成物において使用されるラジカル重合性単量体、カチオン重合性単量体等の重合性単量体を特に制限なく使用できる。中でも、汎用されている(メタ)アクリレート系重合性単量体、具体的には酸性基含有(メタ)アクリレート系重合性単量体、水酸基含有(メタ)アクリレート系重合性単量体、酸性基及び水酸基を有さない単官能又は多官能の(メタ)アクリレート系重合性単量体等を使用することが好ましい。
本実施形態に係る歯科用硬化性組成物においては、ペーストのバサツキを抑制し、硬化体の研磨性、耐摩耗性、及び機械的強度を良好にする観点から、平均粒子径が0.1~1.0μmの無機フィラー(B)を配合する。効果の観点から、無機フィラー(B)の平均粒子径は、0.15~0.7μmであることが好ましい。無機フィラー(B)の平均粒子径が小さくなりすぎると、歯科用硬化性組成物の硬化前のペーストの操作性が低下し、また、硬化物の機械的強度が低下する傾向がある。一方、無機フィラー(B)の平均粒子径が大きくなりすぎると、歯科用硬化性組成物の硬化物の研磨後の光沢が得られ難くなる傾向がある。
有機無機複合フィラー(C)は、平均粒子径が10~1000nmである無機一次粒子同士が当該無機一次粒子の少なくとも一部の表面を被覆する樹脂層を介して空隙を形成するように結合した凝集構造を含む有機無機複合凝集粒子からなり、窒素吸着法で測定した、細孔径が1~500nmの範囲にある細孔の総細孔容積が0.01~0.30cm3/gであり、且つ、平均粒子径が10~100μmである有機無機複合フィラーである。ここで、凝集間隙を形成する細孔の細孔径は、窒素吸着法で測定した孔径1~500nmの範囲の孔における細孔容積分布をもとに求めたメディアン細孔直径を意味する。有機無機複合フィラー(C)としては、窒素吸着法で測定した、細孔径が3~300nmの範囲、特に10~200nmの範囲にある細孔の総細孔容積が0.03~0.20cm3/gであるものを使用することが好ましい。
重合開始剤(D)は、重合性単量体(A)を重合させる機能を有するものであれば特に限定されないが、口腔内で硬化させる場合が多い歯科の直接充填修復用途で使用される光重合開始剤又は化学重合開始剤を使用することが好ましく、混合操作の必要が無く簡便な点から、光重合開始剤を使用することがより好ましい。
本実施形態に係る歯科用硬化性組成物には、その効果を阻害しない範囲で、上述した(A)~(D)成分の他に、他の添加剤を配合することができる。具体的には、重合禁止剤、紫外線吸収剤等が挙げられる。また、粘度調整等を目的として、光の波長よりも十分に小さく色調や透明性に影響を与え難い粒径のフィラーを配合することもできる。
本実施形態に係る歯科用硬化性組成物における(A)~(D)成分の配合量は、通常、重合性単量体(A):100量部に対して、無機フィラー(B):50~350質量部、好ましくは100~300質量部、有機無機複合フィラー(C):50~350質量部、好ましくは100~300質量部、開始剤(D):0.01~10質量部、好ましくは0.1~5質量部である。歯科用硬化性組成物が操作性の良好なペースト性状を示す観点から、重合性単量体(A)100質量部に対する無機フィラー(B)及び有機無機複合フィラー(C)の含有量は、いずれも100~300質量部であり、且つ、無機フィラー(B)及び有機無機複合フィラー(C)の合計の含有量が250~550質量部であることが好ましい。なお、無機フィラー(B)と有機無機複合フィラー(C)との配合割合は、歯科用硬化性組成物の粘度や硬化体の機械的強度を考慮して、上記範囲の中から適宜決定すればよい。
(1)略称・略号
(重合性単量体)
・3G:トリエチレングリコールジメタクリレート
・GMA:2,2-ビス[(3-メタクリロイルオキシ-2-ヒドロキシプロピルオキシ)フェニル]プロパン
・UDMA:1,6-ビス(メタクリルエチルオキシカルボニルアミノ)-2,2-4-トリメチルヘキサン
・F-1:一次粒子の平均粒子径200nmの、ゾルゲル法で製造した球状(平均均斉度0.95)のシリカ-ジルコニア
・F-2:一次粒子の平均粒子径400nmの、ゾルゲル法で製造した球状(平均均斉度0.95)のシリカ-ジルコニア
・F-3:一次粒子の平均粒子径700nmの、ゾルゲル法で製造した球状(平均均斉度0.95)のシリカ-ジルコニア
・F-4:F-1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表面処理物
・F-5:F-2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表面処理物
・F-6:F-3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表面処理物
・AIBN:アゾビスイソブチロニトリル
・CQ:カンファーキノン
・DMBE:N,N-ジメチル-p-安息香酸エチル
走査型電子顕微鏡(フィリップス社製、「XL-30S」)で粉体の写真を5000~100000倍の倍率で撮り、画像解析ソフト(「IP-1000PC」、商品名;旭化成エンジニアリング(株)製)を用いて、撮影した画像の処理を行い、その写真の単位視野内に観察される粒子の数(30個以上)及び一次粒子径(最大径)を測定し、測定値に基づき下記式により数平均粒子径を算出した。
0.1gの有機無機複合フィラーをエタノール10mLに分散させ、超音波を20分間照射した。レーザー回折-散乱法による粒度分布計(「LS230」、ベックマンコールター社製)を用い、光学モデル「フラウンフォーファー」(Fraunhofer)を適用して、体積統計のメディアン径を求めた。
試料セルに有機無機複合フィラーを1.0g入れ、前処理装置(「バッキュプレップ061」、(株)島津製作所製)を用いて、120℃で3時間、真空排気により前処理を行った。その後、吸着ガスとして窒素、冷媒として液体窒素を用いて、ガス吸着法細孔分布測定装置(「トライスターII3020」、(株)島津製作所製)により、細孔径1~500nmの範囲の孔の総細孔容積を求めた。
所定の量比で混合した重合性単量体に対し、赤色光下で重合開始剤を加えて溶解させた。これに対して所定量のフィラーを加え、均一のペースト状になるまでよく混合及び撹拌した。さらに、これを真空脱泡して所定の組成を有する歯科用硬化性組成物のペーストを得た。
歯科用硬化性組成物を直径7mm、厚さ1mmのフッ素樹脂製モールドに充填し、空気存在下で重合及び硬化させた。その後、硬化体をモールドから取り出し、表層の未重合部分をエタノールで洗浄した。洗浄した面の写真を、走査型電子顕微鏡を用いて撮影し、その写真の単位視野内に観察される粒子径5μm以上の粒子を無作為に100個選択し、曲面形状有機無機複合フィラーと不定形有機無機複合フィラーとの存在比を算出した。
硬化前の歯科用硬化性組成物のペースト性状について、操作性の観点から、以下の基準に基づいて評価を行った。すなわち、ベタツキが少ないものはB、ベタツキが特に少ないものはA、ベタツキが強く操作しにくいものはCとして判定した。さらに、バサツキが少ないものはB、バサツキが特に少ないものはA、バサツキが強く操作しにくいものはCとして判定した。評価は、歯科用硬化性組成物を調製した直後及び37℃で6か月間保管した後に実施した。
硬化前の歯科用硬化性組成物のペーストの形態保持性は以下の方法にて評価を行った。まず、右下6番の咬合面中央部にI級窩洞(直径4mm、深さ2mm)を再現した硬質レジン歯に歯科用硬化性組成物のペーストを充填し、充填されたペーストに咬合面形態を付与した。その後、歯科用硬化性組成物を充填した硬質レジン歯を50℃のインキュベータ内に20分間静置し、付与した形態が保持されているか否かを評価した。具体的には、付与した形態に僅かに変化が確認されたものはB、付与した形態が全く変化しないものはA、付与した形態を保持できていないものはCとして判定した。評価は、歯科用硬化性組成物を調製した直後及び37℃で6か月間保管した後に実施した。
歯科用硬化性組成物のペーストについて、充填器を用いてステンレス製型枠に充填し、ポリプロピレンで圧接した状態で、可視光線照射器パワーライト((株)トクヤマ製)を用いて一方の面から30秒×3回、全体に光が当たるように場所を変えてポリプロピレンに密着させて光照射を行った。次いで、反対の面からも同様にポリプロピレンに密着させて30秒×3回光照射を行い、硬化体を得た。#1500の耐水研磨紙にて、硬化体を2×2×25mmの角柱状に整え、この試料片を試験機((株)島津製作所製、「オートグラフAG5000D」)に装着し、支点間距離20mm、クロスヘッドスピード1mm/分で3点曲げ破壊強度を測定した。そして、以下に示した式により曲げ強度σBを求め、試験片5個について評価した平均値を曲げ強さとした。なお、σBは曲げ強度(Pa)、Pは試験片破折時の荷重(N)、Sは支点間距離(m)、Wは試験片の幅(m)、Bは試験片の厚さ(m)をそれぞれ示す。
無機フィラーを水に入れ、循環型粉砕機SCミルを用いて無機フィラーを分散させた分散液を得た。次いで、γ-メタクリロイルオキシプロピルトリメトキシシラン及び酢酸を水に加えて撹拌し、pH4の均一な溶液を得た。この溶液を上記無機粒子分散液に添加し、均一に混合した。その後、上記分散液を噴霧乾燥法により乾燥し、無機粉体を得た。噴霧乾燥には、ノズル先端で粒子化エアと衝突させることで微粒子とする噴霧乾燥機(スプレードライヤー「NL-5」、大川原化工機(株)製)を用い、噴霧圧力を0.08MPa、乾燥温度を230℃とした。その後、噴霧乾燥した無機粉体を120℃で15時間真空乾燥して無機凝集粒子を得た。
無機フィラーを水に入れ、循環型粉砕機SCミルを用いて無機フィラーを分散させた分散液を得た。次いで、γ-メタクリロイルオキシプロピルトリメトキシシラン及び酢酸を水に加えて撹拌し、pH4の均一な溶液を得た。この溶液を上記無機粒子分散液に添加し、均一に混合した。その後、上記分散液を噴霧乾燥法により乾燥し、無機粉体を得た。噴霧乾燥には、高速で回転するディスクを備え、遠心力で微粒子とする噴霧乾燥機(スプレードライヤー「TSR-2W」、坂本技研(株)製)を用い、ディスクの回転速度を9000rpm、乾燥温度を200℃とした。その後、噴霧乾燥した無機粉体を120℃で15時間真空乾燥して無機凝集粒子を得た。
製造例1で製造した曲面形状有機無機複合フィラーを振動ボールミル(ジルコニアボール粒径:5mm)で粉砕し、不定形有機無機複合フィラーを得た。そして、得られた有機無機複合フィラーの平均粒子径及び細孔容積を測定した。結果を表1に示す。
製造例4で製造した曲面形状有機無機複合フィラーを振動ボールミル(ジルコニアボール粒径:5mm)で粉砕し、不定形有機無機複合フィラーを得た。そして、得られた有機無機複合フィラーの平均粒子径及び細孔容積を測定した。結果を表1に示す。
製造例1と同じ無機凝集粒子(10g)、重合性単量体としてGMA(28g)、3G(12g)、重合開始剤としてAIBNをそれぞれ乳鉢に投入し、混合してペースト状の混合物を調製した。このペースト状の混合物を減圧下で脱泡した後、100℃で30分間重合硬化させた。硬化物を振動ボールミル(ジルコニアボール粒径:5mm)で粉砕し、不定形有機無機複合フィラーを得た。そして、得られた有機無機複合フィラーの平均粒子径及び細孔容積を測定した。結果を表1に示す。
GMA(60質量部)と3G(40質量部)とからなる重合性単量体に、重合開始剤としてCQ(0.20質量部)及びDMBE(0.35質量部)を完全に溶解させた後、無機フィラーF-4(200質量部)、製造例1で得た曲面形状有機無機複合フィラー(100質量部)、及び製造例5で得た不定形有機無機複合フィラー(100質量部)を配合し、各成分を乳鉢を用いて手動で均一になるまで混合し、20分間混練した後に脱泡することで、歯科用硬化性組成物を調製した。得られた歯科用硬化性組成物について上記の方法に基づいて各物性を評価した。結果を表3に示す。
表2に示す組成(質量部)に従って、実施例1と同様に実施例2~9、比較例1~5の歯科用硬化性組成物を調製し、各物性を評価した。結果を表3に示す。
GMA(60質量部)と3G(40質量部)とからなる重合性単量体に、重合開始剤としてCQ(0.20質量部)及びDMBE(0.35質量部)を完全に溶解させ、重合性単量体混合物を調製した。この重合性単量体混合物(80質量部)に対し、表2に示す組成で無機フィラー(200質量部)及び曲面形状有機無機複合フィラー(200質量部)を加え、遊星運動型撹拌機プラネタリーミキサー((株)井上製作所製)を用いて撹拌羽の回転数7~10rpmで30分間混練した。その後、30分間おきにペーストの粘度を測定し、ペースト粘度の変化が10%未満となった時点で上記重合性単量体混合物(20質量部)を加え、均一なペースト状となるまでさらに混合し、歯科用硬化性組成物を調製した。得られた歯科用硬化性組成物について上記の方法に基づいて各物性を評価した。結果を表3に示す。
Claims (5)
- 重合性単量体(A);平均粒子径が0.1~1μmである無機フィラー(B);平均粒子径が10~1000nmである無機一次粒子同士が当該無機一次粒子の少なくとも一部の表面を被覆する樹脂層を介して空隙を形成するように結合した凝集構造を含む有機無機複合凝集粒子からなり、窒素吸着法で測定した、細孔径が1~500nmの範囲にある細孔の総細孔容積が0.01~0.30cm3/gであり、且つ、平均粒子径が10~100μmである有機無機複合フィラー(C);及び重合開始剤(D);を含有し、
前記有機無機複合フィラー(C)が、曲面形状を有する有機無機複合凝集粒子からなる曲面形状有機無機複合フィラー(C1)と、エッジ部を含む不定形形状を有する有機無機複合凝集粒子からなる不定形有機無機複合フィラー(C2)と、からなり、
前記有機無機複合フィラー(C)全体に占める前記曲面形状有機無機複合フィラー(C1)の含有率{C1/(C1+C2)}が、粒子径が5μm以上の前記有機無機複合凝集粒子の総数に占める、粒子径が5μm以上の前記曲面形状有機無機複合フィラー(C1)を構成する前記曲面形状を有する有機無機複合凝集粒子の総数の比で表して、0.2~0.8である、歯科用硬化性組成物。 - 前記有機無機複合フィラー(C)が、無機一次粒子を噴霧乾燥によって凝集粒子とし、該凝集粒子の細孔に重合性単量体成分を含浸及び重合させて得られる有機無機複合フィラーである、請求項1に記載の歯科用硬化性組成物。
- 前記不定形有機無機複合フィラー(C2)が、前記曲面形状有機無機複合フィラー(C1)の粉砕物からなる、請求項1又は2に記載の歯科用硬化性組成物。
- 前記無機フィラー(B)及び前記有機無機複合フィラー(C)の含有量が、前記重合性単量体(A)100質量部に対して、それぞれ100~300質量部であり、前記無機フィラー(B)及び前記有機無機複合フィラー(C)の合計の含有量が、前記重合性単量体(A)100質量部に対して、250~550質量部である、請求項1~3のいずれか1項に記載の歯科用硬化性組成物。
- 前記無機フィラー(B)を構成する無機粒子の形状、及び前記有機無機複合フィラー(C)を構成する前記有機無機複合凝集粒子における前記無機一次粒子の形状が、いずれも球状又は略球状である、請求項1~4のいずれか1項に記載の歯科用硬化性組成物。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000080013A (ja) | 1998-09-02 | 2000-03-21 | Gc Corp | 歯科用修復材組成物 |
WO2011115007A1 (ja) | 2010-03-19 | 2011-09-22 | 株式会社トクヤマデンタル | 有機無機複合フィラー、及びその製造方法 |
WO2013039169A1 (ja) * | 2011-09-15 | 2013-03-21 | 株式会社トクヤマデンタル | 有機無機複合フィラー、及びその製造方法 |
JP2017036224A (ja) * | 2015-08-07 | 2017-02-16 | 株式会社トクヤマデンタル | 歯科切削加工用レジン系ブロック及びその製造方法 |
WO2018043595A1 (ja) * | 2016-08-31 | 2018-03-08 | 株式会社トクヤマデンタル | 光硬化性組成物 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101116434B1 (ko) | 2010-04-14 | 2012-03-07 | 엔에이치엔(주) | 이미지를 이용한 쿼리 제공 방법 및 시스템 |
KR102268687B1 (ko) | 2014-04-30 | 2021-06-23 | 한양대학교 산학협력단 | 인쇄회로기판의 구리 선별방법 |
WO2017073664A1 (ja) * | 2015-10-28 | 2017-05-04 | 株式会社トクヤマデンタル | 硬化性組成物、歯科用硬化性組成物および歯科用有機無機複合粒子 |
US10925811B2 (en) * | 2017-03-18 | 2021-02-23 | Kerr Corporation | Porous composite filler compositions |
-
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000080013A (ja) | 1998-09-02 | 2000-03-21 | Gc Corp | 歯科用修復材組成物 |
WO2011115007A1 (ja) | 2010-03-19 | 2011-09-22 | 株式会社トクヤマデンタル | 有機無機複合フィラー、及びその製造方法 |
WO2013039169A1 (ja) * | 2011-09-15 | 2013-03-21 | 株式会社トクヤマデンタル | 有機無機複合フィラー、及びその製造方法 |
JP2017036224A (ja) * | 2015-08-07 | 2017-02-16 | 株式会社トクヤマデンタル | 歯科切削加工用レジン系ブロック及びその製造方法 |
WO2018043595A1 (ja) * | 2016-08-31 | 2018-03-08 | 株式会社トクヤマデンタル | 光硬化性組成物 |
Non-Patent Citations (1)
Title |
---|
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