JP2020068871A - クラウンコア一体型歯科用ミルブランク - Google Patents
クラウンコア一体型歯科用ミルブランク Download PDFInfo
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- JP2020068871A JP2020068871A JP2018202889A JP2018202889A JP2020068871A JP 2020068871 A JP2020068871 A JP 2020068871A JP 2018202889 A JP2018202889 A JP 2018202889A JP 2018202889 A JP2018202889 A JP 2018202889A JP 2020068871 A JP2020068871 A JP 2020068871A
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- JP
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- Prior art keywords
- inorganic filler
- polymerizable monomer
- fine particles
- crown
- mill blank
- Prior art date
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- Granted
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- 238000005461 lubrication Methods 0.000 claims abstract description 16
- 239000011256 inorganic filler Substances 0.000 claims description 108
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 108
- 239000000178 monomer Substances 0.000 claims description 108
- 239000010419 fine particle Substances 0.000 claims description 89
- 239000000203 mixture Substances 0.000 claims description 57
- 239000002245 particle Substances 0.000 claims description 47
- 238000000465 moulding Methods 0.000 claims description 22
- 229920000642 polymer Polymers 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 abstract description 13
- 210000004268 dentin Anatomy 0.000 abstract description 9
- 230000010354 integration Effects 0.000 abstract 1
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- 239000000047 product Substances 0.000 description 52
- 238000006116 polymerization reaction Methods 0.000 description 47
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- 239000003505 polymerization initiator Substances 0.000 description 38
- 238000000034 method Methods 0.000 description 35
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- 238000009694 cold isostatic pressing Methods 0.000 description 23
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- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 4
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- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 description 3
- RGOVHAJZSSODRY-UHFFFAOYSA-N 11-trimethoxysilylundecyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCCCCCCCCCOC(=O)C(C)=C RGOVHAJZSSODRY-UHFFFAOYSA-N 0.000 description 3
- 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 3
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- 239000004342 Benzoyl peroxide Substances 0.000 description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 3
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- 230000002378 acidificating effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 description 3
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- 229910003460 diamond Inorganic materials 0.000 description 3
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- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 125000003232 p-nitrobenzoyl group Chemical group [N+](=O)([O-])C1=CC=C(C(=O)*)C=C1 0.000 description 3
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- 150000003513 tertiary aromatic amines Chemical class 0.000 description 3
- 238000012719 thermal polymerization Methods 0.000 description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- VNQXSTWCDUXYEZ-UHFFFAOYSA-N 1,7,7-trimethylbicyclo[2.2.1]heptane-2,3-dione Chemical compound C1CC2(C)C(=O)C(=O)C1C2(C)C VNQXSTWCDUXYEZ-UHFFFAOYSA-N 0.000 description 2
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- IEXYKOLCMBHVMG-UHFFFAOYSA-N 2-[4-tert-butyl-n-(2-hydroxyethyl)anilino]ethanol Chemical compound CC(C)(C)C1=CC=C(N(CCO)CCO)C=C1 IEXYKOLCMBHVMG-UHFFFAOYSA-N 0.000 description 2
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- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 2
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- RCNRIKGRQSBQQB-UHFFFAOYSA-N 7-(dibutylamino)-3-[7-(dibutylamino)-2-oxochromene-3-carbonyl]chromen-2-one Chemical compound C1=C(N(CCCC)CCCC)C=C2OC(=O)C(C(=O)C3=CC4=CC=C(C=C4OC3=O)N(CCCC)CCCC)=CC2=C1 RCNRIKGRQSBQQB-UHFFFAOYSA-N 0.000 description 2
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- 239000005749 Copper compound Substances 0.000 description 2
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- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 description 2
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 2
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- JEHKKBHWRAXMCH-UHFFFAOYSA-N benzenesulfinic acid Chemical compound O[S@@](=O)C1=CC=CC=C1 JEHKKBHWRAXMCH-UHFFFAOYSA-N 0.000 description 2
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- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 125000002843 carboxylic acid group Chemical group 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 2
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- 150000001880 copper compounds Chemical class 0.000 description 2
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- ZZNQQQWFKKTOSD-UHFFFAOYSA-N diethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OCC)(OCC)C1=CC=CC=C1 ZZNQQQWFKKTOSD-UHFFFAOYSA-N 0.000 description 1
- OTARVPUIYXHRRB-UHFFFAOYSA-N diethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](C)(OCC)CCCOCC1CO1 OTARVPUIYXHRRB-UHFFFAOYSA-N 0.000 description 1
- UCXUKTLCVSGCNR-UHFFFAOYSA-N diethylsilane Chemical compound CC[SiH2]CC UCXUKTLCVSGCNR-UHFFFAOYSA-N 0.000 description 1
- 229940043279 diisopropylamine Drugs 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 description 1
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 description 1
- DIJRHOZMLZRNLM-UHFFFAOYSA-N dimethoxy-methyl-(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](C)(OC)CCC(F)(F)F DIJRHOZMLZRNLM-UHFFFAOYSA-N 0.000 description 1
- 125000002147 dimethylamino group Chemical group [H]C([H])([H])N(*)C([H])([H])[H] 0.000 description 1
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical compound C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 1
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- HGQSXVKHVMGQRG-UHFFFAOYSA-N dioctyltin Chemical compound CCCCCCCC[Sn]CCCCCCCC HGQSXVKHVMGQRG-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 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
- 239000002612 dispersion medium Substances 0.000 description 1
- CIKJANOSDPPCAU-UHFFFAOYSA-N ditert-butyl cyclohexane-1,4-dicarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1CCC(C(=O)OOC(C)(C)C)CC1 CIKJANOSDPPCAU-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 150000002148 esters Chemical class 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
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 description 1
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-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
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 125000005843 halogen group Chemical group 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
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- 150000002430 hydrocarbons Chemical group 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- DOUHZFSGSXMPIE-UHFFFAOYSA-N hydroxidooxidosulfur(.) Chemical compound [O]SO DOUHZFSGSXMPIE-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- XFBCAFRNNFDRNG-UHFFFAOYSA-M lithium;2,4,6-triethylbenzenesulfinate Chemical compound [Li+].CCC1=CC(CC)=C(S([O-])=O)C(CC)=C1 XFBCAFRNNFDRNG-UHFFFAOYSA-M 0.000 description 1
- MIVOPSLBXCQIBW-UHFFFAOYSA-M lithium;2,4,6-trimethylbenzenesulfinate Chemical compound [Li+].CC1=CC(C)=C(S([O-])=O)C(C)=C1 MIVOPSLBXCQIBW-UHFFFAOYSA-M 0.000 description 1
- MSUZXYWQEDRGFN-UHFFFAOYSA-M lithium;4-methylbenzenesulfinate Chemical compound [Li+].CC1=CC=C(S([O-])=O)C=C1 MSUZXYWQEDRGFN-UHFFFAOYSA-M 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- ITNVWQNWHXEMNS-UHFFFAOYSA-N methanolate;titanium(4+) Chemical compound [Ti+4].[O-]C.[O-]C.[O-]C.[O-]C ITNVWQNWHXEMNS-UHFFFAOYSA-N 0.000 description 1
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 239000005055 methyl trichlorosilane Substances 0.000 description 1
- 239000005048 methyldichlorosilane Substances 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- JLUFWMXJHAVVNN-UHFFFAOYSA-N methyltrichlorosilane Chemical compound C[Si](Cl)(Cl)Cl JLUFWMXJHAVVNN-UHFFFAOYSA-N 0.000 description 1
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-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
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-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
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- UHGIMQLJWRAPLT-UHFFFAOYSA-N octadecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCCCCCCCOP(O)(O)=O UHGIMQLJWRAPLT-UHFFFAOYSA-N 0.000 description 1
- IOQPZZOEVPZRBK-UHFFFAOYSA-N octan-1-amine Chemical compound CCCCCCCCN IOQPZZOEVPZRBK-UHFFFAOYSA-N 0.000 description 1
- 150000002902 organometallic compounds Chemical class 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
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 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
- 239000012466 permeate Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000005054 phenyltrichlorosilane Substances 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- HPWMVNFJSFHJIW-UHFFFAOYSA-M potassium;2,4,6-tri(propan-2-yl)benzenesulfinate Chemical compound [K+].CC(C)C1=CC(C(C)C)=C(S([O-])=O)C(C(C)C)=C1 HPWMVNFJSFHJIW-UHFFFAOYSA-M 0.000 description 1
- NLZLDWFYQXFPSZ-UHFFFAOYSA-M potassium;2,4,6-triethylbenzenesulfinate Chemical compound [K+].CCC1=CC(CC)=C(S([O-])=O)C(CC)=C1 NLZLDWFYQXFPSZ-UHFFFAOYSA-M 0.000 description 1
- LZSBNSVOXWMXLL-UHFFFAOYSA-M potassium;benzenesulfinate Chemical compound [K+].[O-]S(=O)C1=CC=CC=C1 LZSBNSVOXWMXLL-UHFFFAOYSA-M 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 150000003139 primary aliphatic amines Chemical class 0.000 description 1
- ZGSOBQAJAUGRBK-UHFFFAOYSA-N propan-2-olate;zirconium(4+) Chemical compound [Zr+4].CC(C)[O-].CC(C)[O-].CC(C)[O-].CC(C)[O-] ZGSOBQAJAUGRBK-UHFFFAOYSA-N 0.000 description 1
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000005619 secondary aliphatic amines Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
- 235000019982 sodium hexametaphosphate Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- GRBCNEIBDFNEES-UHFFFAOYSA-M sodium;2,4,6-trimethylbenzenesulfinate Chemical compound [Na+].CC1=CC(C)=C(S([O-])=O)C(C)=C1 GRBCNEIBDFNEES-UHFFFAOYSA-M 0.000 description 1
- KFZUDNZQQCWGKF-UHFFFAOYSA-M sodium;4-methylbenzenesulfinate Chemical compound [Na+].CC1=CC=C(S([O-])=O)C=C1 KFZUDNZQQCWGKF-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 239000002335 surface treatment layer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- KUCOHFSKRZZVRO-UHFFFAOYSA-N terephthalaldehyde Chemical compound O=CC1=CC=C(C=O)C=C1 KUCOHFSKRZZVRO-UHFFFAOYSA-N 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- JIYXDFNAPHIAFH-UHFFFAOYSA-N tert-butyl 3-tert-butylperoxycarbonylbenzoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC(C(=O)OC(C)(C)C)=C1 JIYXDFNAPHIAFH-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- SWAXTRYEYUTSAP-UHFFFAOYSA-N tert-butyl ethaneperoxoate Chemical compound CC(=O)OOC(C)(C)C SWAXTRYEYUTSAP-UHFFFAOYSA-N 0.000 description 1
- MDDUHVRJJAFRAU-YZNNVMRBSA-N tert-butyl-[(1r,3s,5z)-3-[tert-butyl(dimethyl)silyl]oxy-5-(2-diphenylphosphorylethylidene)-4-methylidenecyclohexyl]oxy-dimethylsilane Chemical compound C1[C@@H](O[Si](C)(C)C(C)(C)C)C[C@H](O[Si](C)(C)C(C)(C)C)C(=C)\C1=C/CP(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 MDDUHVRJJAFRAU-YZNNVMRBSA-N 0.000 description 1
- 150000003510 tertiary aliphatic amines Chemical class 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 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
- ORVMIVQULIKXCP-UHFFFAOYSA-N trichloro(phenyl)silane Chemical compound Cl[Si](Cl)(Cl)C1=CC=CC=C1 ORVMIVQULIKXCP-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- JLGNHOJUQFHYEZ-UHFFFAOYSA-N trimethoxy(3,3,3-trifluoropropyl)silane Chemical compound CO[Si](OC)(OC)CCC(F)(F)F JLGNHOJUQFHYEZ-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 1
- 239000005051 trimethylchlorosilane Substances 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- AAPLIUHOKVUFCC-UHFFFAOYSA-N trimethylsilanol Chemical compound C[Si](C)(C)O AAPLIUHOKVUFCC-UHFFFAOYSA-N 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000009461 vacuum packaging Methods 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000005050 vinyl trichlorosilane Substances 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- XASAPYQVQBKMIN-UHFFFAOYSA-K ytterbium(iii) fluoride Chemical compound F[Yb](F)F XASAPYQVQBKMIN-UHFFFAOYSA-K 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
Landscapes
- Dental Prosthetics (AREA)
Abstract
Description
[1]曲げ弾性率が15〜20GPaであり、ビッカース硬度が100〜170HVであり、かつ滑沢耐久性試験後の光沢度が60%以上である、クラウンコア一体型歯科用ミルブランク;
[2]平均粒子径が0.3μm以上4μm以下である無機充填材(A)、平均粒子径が0.3μm未満である無機微粒子(B)、及び重合性単量体(C)に由来する構造を有する重合体を含む硬化物である、[1]に記載のクラウンコア一体型歯科用ミルブランク;
[3]無機充填材(A)、無機微粒子(B)、及び重合性単量体(C)に由来する構造を有する重合体の合計100質量部において、無機充填材(A)及び無機微粒子(B)の合計が70質量部以上である、[2]に記載のクラウンコア一体型歯科用ミルブランク;
[4]無機充填材(A)に対する無機微粒子(B)の質量比(B)/(A)が、0.14〜0.35である、[2]又は[3]に記載のクラウンコア一体型歯科用ミルブランク;
[5]無機充填材(A)の平均粒子径が、0.3μm以上0.8μm未満である、[1]〜[4]のいずれかに記載のクラウンコア一体型歯科用ミルブランク;
[6]無機微粒子(B)の平均粒子径が、0.1μm未満である、[1]〜[5]のいずれかに記載のクラウンコア一体型歯科用ミルブランク;
[7]平均粒子径が0.3μm以上4μm以下である無機充填材(A)及び平均粒子径が0.3μm未満である無機微粒子(B)の混合物をプレス成形してなる無機充填材成形体と重合性単量体(C)含有組成物を接触させて、重合性単量体(C)を重合硬化させる、[1]に記載のクラウンコア一体型歯科用ミルブランクの製造方法。
本発明のクラウンコア一体型歯科用ミルブランクは、曲げ弾性率が15〜20GPaであり、ビッカース硬度が100〜170HVであり、かつ滑沢耐久性試験後の光沢度が60%以上であることを特徴とする。
なお、無機充填材(A)及び無機微粒子(B)のうちのいずれかのみが表面処理を施されたものであってもよく、無機充填材(A)及び無機微粒子(B)の両方が表面処理を施されたものであってもよい。後者の場合、表面処理された各無機充填材を別々に調製してもよいし、無機充填材(A)と無機微粒子(B)との混合物に表面処理を施すことにより調製してもよい。
例えば、メチル(メタ)アクリレート、イソブチル(メタ)アクリレート、ベンジル(メタ)アクリレート、ラウリル(メタ)アクリレート、2−(N,N−ジメチルアミノ)エチル(メタ)アクリレート、2,3−ジブロモプロピル(メタ)アクリレート、2−ヒドロキシエチル(メタ)アクリレート、6−ヒドロキシヘキシル(メタ)アクリレート、10−ヒドロキシデシル(メタ)アクリレート、プロピレングリコールモノ(メタ)アクリレート、グリセリンモノ(メタ)アクリレート、エリスリトールモノ(メタ)アクリレート、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−ジヒドロキシエチル(メタ)アクリルアミド、(メタ)アクリロイルオキシドデシルピリジニウムブロミド、(メタ)アクリロイルオキシドデシルピリジニウムクロリド、(メタ)アクリロイルオキシヘキサデシルピリジニウムクロリド、(メタ)アクリロイルオキシデシルアンモニウムクロリド、10−メルカプトデシル(メタ)アクリレートなどが挙げられる。
例えば、エチレングリコールジ(メタ)アクリレート、トリエチレングリコールジ(メタ)アクリレート、プロピレングリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、1,6−ヘキサンジオールジ(メタ)アクリレート、1,10−デカンジオールジ(メタ)アクリレート、2,2−ビス[4−〔3−アクリロイルオキシ−2−ヒドロキシプロポキシ〕フェニル]プロパン、2,2−ビス[4−〔3−メタクリロイルオキシ−2−ヒドロキシプロポキシ〕フェニル]プロパン(通称Bis−GMA)、2,2−ビス〔4−(メタ)アクリロイルオキシエトキシフェニル〕プロパン、2,2−ビス〔4−(メタ)アクリロイルオキシポリエトキシフェニル〕プロパン、1,2−ビス〔3−(メタ)アクリロイルオキシ−2−ヒドロキシプロポキシ〕エタン、ペンタエリスリトールジ(メタ)アクリレート、[2,2,4−トリメチルヘキサメチレンビス(2−カルバモイルオキシエチル)]ジメタクリレート(通称UDMA)、2,2,3,3,4,4−ヘキサフルオロ−1,5−ペンチルジ(メタ)アクリレートなどが挙げられる。
例えば、トリメチロールプロパントリ(メタ)アクリレート、トリメチロールエタントリ(メタ)アクリレート、テトラメチロールメタントリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、N,N’−(2,2,4−トリメチルヘキサメチレン)ビス〔2−(アミノカルボキシ)プロパン−1,3−ジオール〕テトラ(メタ)アクリレート、1,7−ジアクリロイルオキシ−2,2,6,6−テトラ(メタ)アクリロイルオキシメチル−4−オキシヘプタンなどが挙げられる。
加熱重合開始剤としては、例えば、有機過酸化物、アゾ化合物などが挙げられる。
光重合開始剤としては、歯科用コンポジットレジンに広く使用されているものを好ましく使用することができ、例えば、(ビス)アシルホスフィンオキシド類、α−ジケトン類、クマリン類などが挙げられる。
化学重合開始剤としては、例えば、レドックス系重合開始剤などが挙げられる。当該レドックス系重合開始剤としては、有機過酸化物−アミン系;有機過酸化物−アミン−スルフィン酸(又はその塩)系などを好ましく用いることができる。レドックス系重合開始剤を使用する場合、酸化剤と還元剤とを別々に包装しておき、使用する直前に両者を混合するのが好ましい。
市販のバリウムボロシリケートガラスGM27884 UF2.0グレード(ショット社製、平均1次粒子径:2.0μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン2gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−1)を得た。
市販のバリウムボロシリケートガラスGM27884 UF1.0グレード(ショット社製、平均1次粒子径:1.0μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン3gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−2)を得た。
市販のバリウムボロシリケートガラスGM27884 UF0.7グレード(ショット社製、平均1次粒子径:0.7μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。11−メタクリロイルオキシウンデシルトリメトキシシラン5gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−3)を得た。
市販のバリウムボロシリケートガラスGM27884 UF0.4グレード(ショット社製、平均1次粒子径:0.4μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。11−メタクリロイルオキシウンデシルトリメトキシシラン7gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−4)を得た。
市販のランタンガラスGM31684SM3.5グレード(ショット社製、平均1次粒子径:3.4〜4.7μm、屈折率1.58)を振動ボールミルにて20時間粉砕し、平均1次粒子径:2.0μm(D99:12μm)の粉砕品を得た。その粉砕品100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン2.5gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−5)を得た。
市販のランタンガラスGM31684K1グレード(ショット社製)を振動ボールにて10時間粉砕し、平均1次粒子径:5.4μmの粉砕品を得た。その粉砕品100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン1.4gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機充填材(A−6)を得た。
市販のバリウムボロシリケートガラスGM27884 NF180グレード(ショット社製、平均1次粒子径:0.2μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン9gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機微粒子(B−1)を得た。
市販のバリウムボロシリケートガラスGM27884 NF180グレード(ショット社製、平均1次粒子径:0.2μm、屈折率1.53)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。11−メタクリロイルオキシウンデシルトリメトキシシラン9gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機微粒子(B−2)を得た。
市販の超微粒子シリカ(日本アエロジル株式会社製、アエロジル(登録商標)OX 50、平均1次粒子径:0.04μm、屈折率:1.46、BET比表面積:50m2/g)100gに対し、エタノール300gを加え、超音波洗浄機にて1時間分散を行った。3−メタクリロイルオキシプロピルトリメトキシシラン7gと水5g及び酢酸0.1gを撹拌させた加水分解溶液を加え、1時間室温で撹拌した。溶媒を減圧留去し、さらに90℃で3時間乾燥することによって、表面処理剤で処理された無機微粒子(B−3)を得た。
[2,2,4−トリメチルヘキサメチレンビス(2−カルバモイルオキシエチル)]ジメタクリレート(UDMA)90質量部及びトリエチレングリコールジメタクリレート(TEGDMA)10質量部に、加熱重合開始剤として1,1,3,3−テトラメチルブチルヒドロペルオキシド(THP)0.5質量部を溶解させて、重合性単量体(C)含有組成物(C−1)を調製した(重合性単量体(C)含有組成物の硬化物の屈折率:1.51)。
[2,2,4−トリメチルヘキサメチレンビス(2−カルバモイルオキシエチル)]ジメタクリレート(UDMA)100質量部に、加熱重合開始剤として1,1,3,3−テトラメチルブチルヒドロペルオキシド(THP)0.5質量部を溶解させて、重合性単量体(C)含有組成物(C−2)を調製した(重合性単量体(C)含有組成物の硬化物の屈折率:1.51)。
無機充填材(A−1)と無機微粒子(B−1)を質量比(B)/(A)=0.33になるよう測量し、#255のナイロンメッシュにて篩掛けを行い、篩下の混合粉末8.0g、14.5mm×18.0mmの長方形の穴を持つプレス用金型の下パンチ棒の上に敷いた。タッピングにより粉末をならし、上パンチをその上に載せ、テーブルプレス機を用い、面圧38.3MPaにてプレス成形を行って成形体を取り出した。さらに、当該成形体についてCIP工程によりプレス成形(圧力:170MPa、加圧時間:5分間)を行い、プレス成形体を得た。
得られたプレス成形体を重合性単量体(C)含有組成物(C−1)に浸漬し、減圧(100hPa)して脱気し、70℃48時間静置して、重合性単量体(C)含有組成物を含浸し、重合性単量体(C)含浸されたプレス成形体を得た。この重合性単量体(C)が含浸されたプレス成形体を熱風乾燥器を用い、110℃7時間加熱した後、150℃で7時間加熱して、目的とする直方体状の硬化物であるクラウンコア一体型歯科用ミルブランクを得た。
無機充填材(A)、無機微粒子(B)、重合性単量体(C)の種類と使用量をそれぞれ表1に記載されるように変更したこと以外は、実施例1と同様にして直方体状の硬化物であるクラウンコア一体型歯科用ミルブランクを得た。
無機微粒子(B−1)と無機微粒子(B−3)を表2の記載になるよう測量し、#255のナイロンメッシュにて篩掛けを行い、篩下の混合粉末8.0g、14.5mm×18.0mmの長方形の穴を持つプレス用金型の下パンチ棒の上に敷いた。タッピングにより粉末をならし、上パンチをその上に載せ、テーブルプレス機を用い、面圧38.3MPaにてプレス成形を行って成形体を取り出した。さらに、当該成形体についてCIP工程によりプレス成形(圧力:170MPa、加圧時間:5分間)を行い、プレス成形体を得た。
得られたプレス成形体を重合性単量体(C)含有組成物(C−2)に浸漬し、減圧(100hPa)して脱気し、70℃48時間静置して、重合性単量体(C)含有組成物が含浸されたプレス成形体を得た。この重合性単量体(C)が含浸されたプレス成形体を熱風乾燥器を用い、110℃7時間加熱した後、150℃で7時間加熱して、目的とする直方体状の硬化物である歯科用ミルブランクを得た。
無機充填材(A)、無機微粒子(B)、重合性単量体(C)の種類と使用量をそれぞれ表2に記載されるように変更したこと以外は、比較例1と同様にして直方体状の硬化物である歯科用ミルブランクを得た。
実施例及び比較例の硬化物の曲げ弾性率は、以下のように測定した。硬化物より試験片(寸法4mm×1.2mm×14mm)をダイヤモンドカッターにて切り出し、該試験片を10本作製し、37℃の蒸留水中に1週間保管した。万能試験機(株式会社島津製作所製、商品コード「AG−I 100kN」)を用いて、支点間距離10mm、クロスヘッドスピード1mm/分の条件下で曲げ弾性率を測定し、その平均値を算出し、曲げ弾性率とした。結果を表1、2に示す。曲げ弾性率は、15〜20GPaであれば好ましく、16〜19GPaであればより好ましい。
実施例及び比較例の硬化物のビッカース硬度は、JIS Z 2244:2009に準じて以下のようにして測定した。各硬化物から、ダイヤモンドカッターにて板状試験片(10mm×10mm×1.3mm)を切り出し、平滑面を#1500研磨紙、#2000研磨紙、#3000研磨紙の順に乾燥条件下で研磨し、1.2mm厚みになった硬化物を37℃水中に1日浸漬した。浸漬した試験片を、微小硬さ試験機(HM−221 株式会社ミツトヨ製)を用いて、200gで10秒間荷重をかけて、ビッカース硬度を測定した。ビッカース硬度は、100〜170HVであれば好ましく、120〜160HVであればより好ましい。なお、本明細書において、ビッカース硬度の数値表記では、計測荷重の記載を省略する。
実施例及び比較例の硬化物の滑沢耐久性は、以下のように測定した。各硬化物から、ダイヤモンドカッターにて板状試験片(10mm×10mm×1.3mm)を切り出し、平滑面を#1500研磨紙、#2000研磨紙、#3000研磨紙の順に乾燥条件下で研磨し、1.2mm厚みになった硬化物の研磨面をさらに、その表面を技工用ポリシングボックス(KaVoデンタル システムズ ジャパン株式会社製、VG−107)を用いて、この研磨面の光沢を、光沢度計(日本電色工業株式会社製、VG2000)にて測定し鏡を100%とした時、光沢度の初期値が90%以上になるように鏡面研磨した。作製した試験片を、滑沢耐久性試験として歯ブラシ磨耗試験{歯ブラシ:ビットウィーンライオン(硬さふつう)、歯磨き粉:デンタークリアーMAX(ライオン株式会社製)、荷重250g、試験溶液:蒸留水/歯磨き粉=90/10wt%(50mL)、磨耗回数4万回}に供した。歯ブラシ摩耗試験後の試験片の光沢度(残存光沢度)を測定した。滑沢耐久性は、残存光沢度が60%以上であれば好ましく、70%以上であればより好ましい。
実施例及び比較例の硬化物の耐チッピング性は、以下のように測定した。すなわち、各硬化物から、底辺の直径が10mm、高さ12mmの円錐状のサンプルを歯科用ミリング装置「DWX−50」(ローランド ディージー株式会社製)を用いたミリングによって削り出した。加工したサンプルを、3Dレーザー顕微鏡(株式会社キーエンス製、VK−9710)にて観察し、円錐状の先端部位にチッピングの有無を観察した。先端部にチッピングがある場合を「×」と判定し、無い場合を「○」と判定した。
耐チッピング性評価にて作製した円錐状のサンプルの底辺をマイクロスコープ(株式会社キーエンス製、VHX−100)にて、その直径を測定した。基準直径10.00mmとし、それに対する誤差を加工精度の指標とした。測定値は、3回の平均とした。直径に対する誤差が、30μm未満が好ましく、さらに20μm未満であればより好ましい。
Claims (7)
- 曲げ弾性率が15〜20GPaであり、ビッカース硬度が100〜170HVであり、かつ滑沢耐久性試験後の光沢度が60%以上である、クラウンコア一体型歯科用ミルブランク。
- 平均粒子径が0.3μm以上4μm以下である無機充填材(A)、平均粒子径が0.3μm未満である無機微粒子(B)、及び重合性単量体(C)に由来する構造を有する重合体を含む硬化物である、請求項1に記載のクラウンコア一体型歯科用ミルブランク。
- 無機充填材(A)、無機微粒子(B)、及び重合性単量体(C)に由来する構造を有する重合体の合計100質量部において、無機充填材(A)及び無機微粒子(B)の合計が70質量部以上である、請求項2に記載のクラウンコア一体型歯科用ミルブランク。
- 無機充填材(A)に対する無機微粒子(B)の質量比(B)/(A)が0.14〜0.35である、請求項2又は3に記載のクラウンコア一体型歯科用ミルブランク。
- 無機充填材(A)の平均粒子径が、0.3μm以上0.8μm未満である、請求項1〜4のいずれか1項に記載のクラウンコア一体型歯科用ミルブランク。
- 無機微粒子(B)の平均粒子径が、0.1μm未満である、請求項1〜5のいずれか1項に記載のクラウンコア一体型歯科用ミルブランク。
- 平均粒子径が0.3μm以上4μm以下である無機充填材(A)及び平均粒子径が0.3μm未満である無機微粒子(B)の混合物をプレス成型してなる無機充填材成形体と重合性単量体(C)含有組成物を接触させて、重合性単量体(C)を重合硬化させる、請求項1に記載のクラウンコア一体型歯科用ミルブランクの製造方法。
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