CN105943405A - 缓释氟离子ppc再矿化膜及其制备方法 - Google Patents
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000013268 sustained release Methods 0.000 title abstract description 6
- 239000012730 sustained-release form Substances 0.000 title abstract description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 39
- 229920001577 copolymer Polymers 0.000 claims abstract description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 8
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 8
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 8
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 5
- 239000010452 phosphate Substances 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 5
- 239000010408 film Substances 0.000 claims description 23
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 10
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 10
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 239000011775 sodium fluoride Substances 0.000 claims description 10
- 235000013024 sodium fluoride Nutrition 0.000 claims description 10
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- MPPQGYCZBNURDG-UHFFFAOYSA-N 2-propionyl-6-dimethylaminonaphthalene Chemical compound C1=C(N(C)C)C=CC2=CC(C(=O)CC)=CC=C21 MPPQGYCZBNURDG-UHFFFAOYSA-N 0.000 claims description 7
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 235000017550 sodium carbonate Nutrition 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 6
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 6
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims description 6
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000001506 calcium phosphate Substances 0.000 claims description 5
- 229910000389 calcium phosphate Inorganic materials 0.000 claims description 5
- 235000011010 calcium phosphates Nutrition 0.000 claims description 5
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 229910000402 monopotassium phosphate Inorganic materials 0.000 claims description 5
- 235000019796 monopotassium phosphate Nutrition 0.000 claims description 5
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 claims description 5
- 239000011736 potassium bicarbonate Substances 0.000 claims description 5
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 5
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 5
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 5
- 235000011181 potassium carbonates Nutrition 0.000 claims description 5
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 235000011008 sodium phosphates Nutrition 0.000 claims description 5
- 229910052712 strontium Inorganic materials 0.000 claims description 5
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 5
- 239000011573 trace mineral Substances 0.000 claims description 5
- 235000013619 trace mineral Nutrition 0.000 claims description 5
- 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 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- 239000011701 zinc Substances 0.000 claims description 5
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 2
- 210000004268 dentin Anatomy 0.000 abstract description 5
- 238000000586 desensitisation Methods 0.000 abstract description 5
- 210000000214 mouth Anatomy 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004615 ingredient Substances 0.000 abstract description 2
- 206010020751 Hypersensitivity Diseases 0.000 abstract 2
- 239000004480 active ingredient Substances 0.000 abstract 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 11
- 239000011737 fluorine Substances 0.000 description 11
- 229910052731 fluorine Inorganic materials 0.000 description 11
- 230000000675 anti-caries Effects 0.000 description 8
- 208000002925 dental caries Diseases 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 241000241413 Propolis Species 0.000 description 7
- 238000005115 demineralization Methods 0.000 description 7
- 230000002328 demineralizing effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229940069949 propolis Drugs 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002966 varnish Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- 229910001467 sodium calcium phosphate Inorganic materials 0.000 description 3
- 241000283690 Bos taurus Species 0.000 description 2
- 229920001661 Chitosan Polymers 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 210000004283 incisor Anatomy 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 208000008655 root caries Diseases 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
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- 230000002596 correlated effect Effects 0.000 description 1
- 230000003013 cytotoxicity Effects 0.000 description 1
- 231100000135 cytotoxicity Toxicity 0.000 description 1
- 210000004489 deciduous teeth Anatomy 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002389 environmental scanning electron microscopy Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- -1 japanning Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100001083 no cytotoxicity Toxicity 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 229960001957 stomatological preparations Drugs 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
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- 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
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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Abstract
本发明涉及一种缓释氟离子PPC再矿化膜及其制备方法,涉及能预防及治疗龋齿和牙本质过敏的脱敏治疗的再矿化膜及其制备方法。二氧化碳‑环氧丙烷共聚物100份,聚醋酸乙烯酯5份~20份,聚乙二醇5份~10份,碳酸盐0.1份~0.3份,磷酸盐0.1份~0.3份,氟化物0.001份~0.005份。优点是由于具有自粘性的特点,有效成分在口腔中保留时间长,使用方便,患者可按自身条件自行选择地点和时间进行治疗,进而方便龋齿的预防和早期治疗以及牙本质过敏的脱敏治疗。
Description
技术领域
本发明属于一种能预防及治疗龋齿以及牙本质过敏的脱敏治疗的再矿化膜及其制备方法,尤其涉及一种能够缓释氟离子PPC再矿化膜及其制备方法。
背景技术
二氧化碳-环氧丙烷共聚物PPC是一种新型的无定形生物降解材料,有关自粘性及可控缓释药物的文献,经检索分析存在如下问题:
1、没有自粘性,临床操作复杂,技术敏感性高,不便于患者自身操作。
如检索到的文献:蔡爽(首都医科大学),时清,李玉晶,等.蜂胶涂膜抗乳牙人工龋的体外研究[J].首都医科大学学报,2006,27(3):294-297;蔡爽(首都医科大学).蜂胶涂膜防龋作用的实验研究[D].北京:首都医科大学,2003;蔡爽(首都医科大学),时清,杨东梅,等.蜂胶防龋涂膜的缓释作用[C]//.FDI世界口腔医学大会论文摘要汇编,2006:1;桂亚婕(第四军医大学).牙科释氟材料缓释氟及再充氟性能的研究[D].西安:第四军医大学,2013;青岛大学医学院附属医院.一种纳米羧甲基壳聚糖氟化钠防龋涂膜及其制备方法和应用:中国,CN201410210251.2[P].2014-8-6;莎日娜(内蒙古医学院).氟保护漆对乳牙抗龋性的实验研究[D].呼和浩特:内蒙古医学院,2010;含氟表面活性剂涂料对根面龋防龋作用的实验研究[Z]昆明市口腔医院.2006;宋军(昆明市卫生局),秦晓红,董骧,等.含氟表面活性剂涂料对根面龋防龋作用的实验研究[Z]昆明市卫生局,2002等;其中描述的氟化物所使用的方式是涂膜、涂漆、粘结剂和水门汀,没有自粘性,临床操作步骤多且技术敏感性要求高,不便于患者自身操作,且氟化物发挥作用的时间和浓度不易掌控。
2、载体来源及制备成本高,易受口腔湿润环境的影响,不利于临床应用和普及。
如检索到的文献:蔡爽(首都医科大学),时清,李玉晶,等.蜂胶涂膜抗乳牙人工龋的体外研究[J].首都医科大学学报,2006,27(3):294-297;蔡爽(首都医科大学).蜂胶涂膜防龋作用的实验研究[D].北京:首都医科大学,2003;蔡爽(首都医科大学),时清,杨东梅,等.蜂胶防龋涂膜的缓释作用[C]//.FDI世界口腔医学大会论文摘要汇编,2006:1;许伟森(山东大学),熊世江.氟化物涂膜的临床应用[J].中华口腔医学研究杂志(电子版),2009,3(2):219-221;描述以蜂胶作为氟化物载体;李欣(兰州大学),王资盛,张潇,等.羧甲基壳聚糖氟缓释膜的制备及性能检测[J].中国医院药学杂志,2014,34(4):289-292;桂亚婕(第四军医大学).牙科释氟材料缓释氟及再充氟性能的研究[D].西安:第四军医大学,2013,赵红萍(第四军医大学).氟化钠明胶缓释微球的制备及其体外抑龋实验研究[D].西安:第四军医大学,2003;青岛大学医学院附属医院.一种纳米羧甲基壳聚糖氟化钠防龋涂膜及其制备方法和应用:中国,CN201410210251.2[P].2014-8-6;莎日娜(内蒙古医学院).氟保护漆对乳牙抗龋性的实验研究[D].呼和浩特:内蒙古医学院,2010;含氟表面活性剂涂料对根面龋防龋作用的实验研究[Z]昆明市口腔医院.2006;宋军(昆明市卫生局),秦晓红,董骧,等.含氟表面活性剂涂料对根面龋防龋作用的实验研究[Z]昆明市卫生局.2002,描述的承载氟化物所使用的为羧甲基壳聚糖、树脂、明胶、氟化硅烷、含氟表面活性剂、粘结剂和水门汀等;这些载体来源有限且制备成本昂贵,在口腔湿润环境下,其疗效受影响,不利于在临床广泛应用和普及。
3、氟粘贴片缓释氟的剂量可控性差,难以满足临床龋病预防和早期治疗。
如检索到的文献:葛瑶(北京医科大学).缓释氟片防治龋齿作用的研究[D].北京:北京医科大学,1997,葛瑶(北京医科大学),王勤.缓释氟粘贴片体外抗龋和再矿化的潜力[J].北京医科大学学报,1998,30(3);葛瑶(北京医科大学),王勤.缓释氟粘贴片体外抗龋和再矿化的潜力[J].北京医科大学学报,1998,30(3);葛瑶(北京医科大学),王勤.缓释氟粘贴片体内防治龋齿效果的评价[J].现代口腔医学杂志,2001,15(4):274-275;葛瑶(北京大学),王勤.缓释氟粘贴片对釉质病变深层脱矿的再矿化及沉积物的分析[J].现代口腔医学杂志,2001,15(6):423-425;葛瑶(北京大学).缓释氟粘贴片的释放、细胞毒性及防龋相关性能的研究[D].北京:北京大学,2002;描述的缓释氟粘贴片含氟量为0.25mgF-或0.5mgF-
,而临床患者全身状态和患牙局部脱矿程度具有多样性和复杂性,因而上述文献的浓度范围很难满足临床龋病预防和早期治疗的目的。
发明内容
本发明提供一种缓释氟离子PPC再矿化膜及其制备方法,以解决目前存在的没有自粘性,临床操作复杂,技术敏感性高,不便于患者自身操作,载体来源及制备成本高,易受口腔湿润环境的影响,不利于临床应用和普及,氟粘贴片缓释氟的剂量可控性差,难以满足临床龋病预防和早期治疗以及牙本质过敏的脱敏治疗的问题。
本发明采取的技术方案是:包括以下重量份的原料:
二氧化碳-环氧丙烷共聚物100份;
聚醋酸乙烯酯5份~20份;
聚乙二醇5份~10份;
碳酸盐0.1份~0.3份;
磷酸盐0.1份~0.3份;
氟化物0.001份~0.005份;
本发明所述二氧化碳-环氧丙烷共聚物的数均分子量5万~10万,分子量分布在2.0~3.0,聚碳酸酯链段含量70%~85%,催化剂残余低于5ppm;
本发明所述聚醋酸乙烯酯的数均分子量6.5万~10万,分子量分布在1.5~2.5;
本发明所述聚乙二醇的分子量200~6000g/mol;
本发明所述碳酸盐为碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾中的一种或几种;
本发明所述磷酸盐为磷酸氢二钠、磷酸二氢钠、磷酸氢二钾、磷酸二氢钾、磷酸钙、磷酸钠中的一种或几种;
本发明所述氟化物为氟化钙、氟化钠、氟硅酸钠中的一种或几种;
本发明所述氟化物中含有促进再矿化的微量元素:锶、硅、锌和铝等。
一种缓释氟离子PPC再矿化膜的制备方法,包括下列步骤:
1)、将所有原料投入搅拌机,混合均匀,得到预混料;
2)、将预混料投入捏合机,在140±5℃混合3~5分钟,熔融混合均匀,并在挤压机中挤压出,得到不同厚度的再矿化PPC薄膜。
本发明所述步骤2)中挤出的再矿化薄膜厚度为0.2毫米~1毫米。
二氧化碳-环氧丙烷共聚物(PPC)是一种新型的无定形生物降解材料,其玻璃化转变温度在32-36℃范围内,在人体温度环境使用时是柔软的,在患者口腔使用较其他材料更加舒适,而且绿色纯化的PPC催化剂残余低于5ppm,纯化 PPC在细胞相对增殖率评价结果得到,PPC膜高于80%的相对增殖率,不但没有细胞毒性,而且还有促进细胞生长的作用。
本发明的优点是由于具有自粘性的特点,有效成分在口腔中保留时间长,使用方便,患者可按自身条件自行选择地点和时间进行治疗,进而方便龋齿的预防和早期治疗以及牙本质过敏的脱敏治疗。
附图说明
图1是牛牙脱矿后表面SEM图;
图2本发明实验例提供的缓释氟离子PPC薄膜再矿化处理后的牛牙表明SEM图。
具体实施方式
实施例1
包括以下重量份的原料:
二氧化碳-环氧丙烷共聚物100份,数均分子量5万,分子量分布在2.0,聚碳酸酯链段含量70%,催化剂残余低于5ppm;
聚醋酸乙烯酯5份,数均分子量6.5万,分子量分布在1.5;
聚乙二醇5份,分子量200g/mol;
碳酸钠0.1份;
磷酸氢二钠0.1份;
氟化钙0.001份;
所述碳酸钠还可以是碳酸氢钠或碳酸钾或碳酸氢钾;
所述磷酸氢二钠还可以是磷酸二氢钠或磷酸氢二钾或磷酸二氢钾或磷酸钙或磷酸钠;
所述氟化钙还可以氟化钠或氟硅酸钠;
所述氟化钙、氟化钠或氟硅酸钠中含有促进再矿化的微量元素:锶、硅、锌和铝;
包括下列步骤:
1)、将所有原料投入搅拌机,混合均匀,得到预混料;
2)、将预混料投入捏合机,在135℃混合3分钟,熔融混合均匀,并在挤压机中挤压出,得到厚度为0.2毫米的再矿化PPC薄膜。
实施例2
包括以下重量份的原料:
二氧化碳-环氧丙烷共聚物100份,数均分子量7.5万,分子量分布在2.5,聚碳酸酯链段含量77%,催化剂残余低于5ppm;
聚醋酸乙烯酯12.5份;数均分子量8.2万,分子量分布在2.0;
聚乙二醇7.5份;分子量3100g/mol;
碳酸钠、0.1份
碳酸氢钠0.1份;
磷酸氢二钠、0.1份
磷酸二氢钠0.1份;
氟化钙0.001份
氟化钠0.002份;
本发明所述碳酸钠、碳酸氢钠还可以分别是碳酸钾或碳酸氢钾;
本发明所述磷酸氢二钠、磷酸二氢钠还可以分别是磷酸氢二钾或磷酸二氢钾或磷酸钙或磷酸钠;
本发明所述氟化钙、氟化钠还可以分别是氟硅酸钠;
所述氟化钙、氟化钠或氟硅酸钠中含有促进再矿化的微量元素:锶、硅、锌和铝;
包括下列步骤:
1)、将所有原料投入搅拌机,混合均匀,得到预混料;
2)、将预混料投入捏合机,在140℃混合4分钟,熔融混合均匀,并在挤压机中挤压出,得到厚度为0.6毫米的再矿化PPC薄膜。
实施例3
包括以下重量份的原料:
二氧化碳-环氧丙烷共聚物100份;数均分子量10万,分子量分布在3.0,聚碳酸酯链段含量85%,催化剂残余低于5ppm;
聚醋酸乙烯酯20份;数均分子量10万,分子量分布在2.5;
聚乙二醇10份;分子量6000g/mol;
任意比例的碳酸钠、碳酸氢钠、碳酸钾和碳酸氢钾共0.3份;
任意比例的磷酸氢二钠、磷酸二氢钠、磷酸氢二钾、磷酸二氢钾、磷酸钙和磷酸钠共0.3份;
任意比例的氟化钙、氟化钠和氟硅酸钠共0.005份;
所述氟化钙、氟化钠或氟硅酸钠中含有促进再矿化的微量元素:锶、硅、锌和铝;
包括下列步骤:
1)、将所有原料投入搅拌机,混合均匀,得到预混料;
2)、将预混料投入捏合机,在145℃混合5分钟,熔融混合均匀,并在挤压机中挤压出,得到厚度为1毫米的再矿化PPC薄膜。
下边通过实验例来进一步证明本发明的效果。
通过首先将牛切牙脱矿,然后使用缓释氟离子PPC薄膜再矿化处理,通过显微硬度仪对牛牙进行表明硬度检测来查看缓释氟离子PPC薄膜的再矿化效果。显微硬度检测是测量牙釉质硬度的主要方法之一,由于硬度变化可反应矿物质变化情况,因此被广泛用于评估牙釉质脱矿和再矿化变化情况的实验研究中,具体操作为以下步骤:
1)标本的制备:将牛切牙用4%甲醛溶液固定48小时,用生理盐水冲洗3分钟,用抛光布轮和浮石粉将其抛光至镜面状,制备标本。
2)脱矿:添加脱矿的实验过程,室温下干燥24小时。
3)再矿化:将脱矿后的标本贴上缓释氟离子PPC再矿化膜,再矿化实验为每8小时覆PPC再矿化膜20分钟,再矿化一周、两周和三周为实验周期,用去离子水清洗,室温下干燥后,采用上海光学仪器五厂生产的15JE型显微硬度仪进行硬度检测。采用FEI公司 XL-30 FEG ESEM 场发射环境扫描电镜进行表面检测。
实验结果表明,本发明提供的缓释氟离子PPC薄膜再矿化效果明显,硬度最高可达303,而且扫描电镜(SEM)图显示缓释氟离子PPC薄膜再矿化处理后表面变得平整、光滑。
Claims (10)
1.一种缓释氟离子PPC再矿化膜,其特征在于包括以下重量份的原料:
二氧化碳-环氧丙烷共聚物100份;
聚醋酸乙烯酯5份~20份;
聚乙二醇5份~10份;
碳酸盐0.1份~0.3份;
磷酸盐0.1份~0.3份;
氟化物0.001份~0.005份。
2.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述二氧化碳-环氧丙烷共聚物的数均分子量5万~10万,分子量分布在2.0~3.0,聚碳酸酯链段含量70%~85%,催化剂残余低于5ppm。
3.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述聚醋酸乙烯酯的数均分子量6.5万~10万,分子量分布在1.5~2.5。
4.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述聚乙二醇的分子量200~6000g/mol。
5.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述碳酸盐为碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾中的一种或几种。
6.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述磷酸盐为磷酸氢二钠、磷酸二氢钠、磷酸氢二钾、磷酸二氢钾、磷酸钙、磷酸钠中的一种或几种。
7.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于:所述氟化物为氟化钙、氟化钠、氟硅酸钠中的一种或几种。
8.根据权利要求1所述的一种缓释氟离子PPC再矿化膜,其特征在于所述氟化物中含有促进再矿化的微量元素:锶、硅、锌和铝。
9.一种如权利要求1所述的缓释氟离子PPC再矿化膜的制备方法,其特征在于,包括下列步骤:
1)、将所有原料投入搅拌机,混合均匀,得到预混料;
2)、将预混料投入捏合机,在140±5℃混合3~5分钟,熔融混合均匀,并在挤压机中挤压出,得到不同厚度的再矿化PPC薄膜。
10.根据权利要求1所述的缓释氟离子PPC再矿化膜的制备方法,其特征在于,所述步骤2)中挤出的再矿化薄膜厚度为0.2毫米~1毫米。
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