JP2020176110A - 象牙質コラーゲン線維の脱灰材料及びその製造方法と応用 - Google Patents
象牙質コラーゲン線維の脱灰材料及びその製造方法と応用 Download PDFInfo
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- JP2020176110A JP2020176110A JP2020043241A JP2020043241A JP2020176110A JP 2020176110 A JP2020176110 A JP 2020176110A JP 2020043241 A JP2020043241 A JP 2020043241A JP 2020043241 A JP2020043241 A JP 2020043241A JP 2020176110 A JP2020176110 A JP 2020176110A
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- conjugate
- chitosan
- acid
- kda
- dentin
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Classifications
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- A—HUMAN NECESSITIES
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- 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
- A61K6/898—Polysaccharides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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Abstract
Description
水溶性キトサンの水溶液とEDTAの水溶液とを混合し、架橋剤を混合溶液に溶解して室温で反応させることを含む。架橋剤の作用により、水溶性キトサンとEDTAは、共有結合反応が発生する。前記反応において、反応物の総質量に対して、水溶性キトサンの質量部は、0.05〜20であってよく、好ましくは、0.1〜15、0.2〜10、0.5〜8であり、例えば、0.8、0.9、1、1.2、1.5、2、3、4又は5である。前記反応において、反応物の総質量に対して、アミノカルボン酸系金属キレート剤の質量部は、1〜60であってよく、好ましくは、5〜50、10〜40であり、例えば、15、20、25、30、35又は45である。前記反応において、反応物の総質量に対して、架橋剤の質量部は、0.1〜15であってよく、好ましくは、0.2〜10、0.5〜5であり、例えば、0.6、0.8、1、1.5、2、2.5、3又は3.5である。
好ましくは、本発明の製造方法では、混合溶液のpHを中性又はアルカリ性、例えばpH7〜10、例えば7.5、8、8.5、9又は9.5に調整する。
濃度が5〜10mg/mLの水溶性キトサンの水溶液と濃度が100〜300mg/mLのEDTAの水溶液とを等体積混合し、混合溶液のPH=6.0に調整した後、8〜15mg/mLの量で架橋剤を加え、室温で12〜16時間反応させた後、適切な条件の透析により未反応残留物を除去した後に凍結乾燥して、象牙質コラーゲン線維の脱灰材料を得ることを含む。
この実施例の材料は、適切な濃度のグリコールキトサン(重合度≧400、MilliporeSigma、St.Louis、MO、USA)の水溶液とEDTAの水溶液を混合した後、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を加え、室温で14時間撹拌し続けた後、適切な透析条件で未反応残留物を除去する。グリコールキトサンの総量が10gで、EDTAが300gで、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤が15gである。
該実施例は、
(1)グリコールキトサンを脱イオン水に溶解して、濃度が10mg/mLのキトサン溶液を形成し、
(2)EDTAを脱イオン水に溶解して、濃度が300mg/mLのEDTA水溶液を形成し、
(3)上記2種類の溶液を等体積混合し、混合溶液のPH=6.0に調整し、
(4)1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を15mg/mLの濃度で上記混合溶液に溶解し、EDTA分子鎖上のカルボキシル基官能基と可溶性キトサン骨格のアミノ官能基とを共有結合させ、室温で14時間撹拌し続け、
(5)上記反応液を、分画分子量が12〜14kDaで0.05MのNaOHを含有する透析膜に入れて透析して分子量の小さい反応物を除去し、分画分子量12〜14kDaで再蒸留水を含有する透析膜で再度透析して未架橋の残留物を除去し、−20℃で凍結乾燥して保存するという点で、実施例1と相違する。水溶性キトサンに架橋されたEDTAカルシウムイオンキレート剤材料を製造する。
該実施例は、
(1)カルボキシメチルキトサンを脱イオン水に溶解して、濃度が7mg/mLのキトサン溶液を形成し、
(2)EDTAを脱イオン水に溶解して、濃度が200mg/mLのEDTAの水溶液を形成し、EDTAの水溶液とカルボキシメチルキトサンとを等体積混合し、混合溶液のPH=6.0に調整し、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を13mg/mLの濃度で上記混合溶液に溶解し、室温で12時間撹拌し続けるという点で、実施例2と相違する。
該実施例は、
(1)ヒアルロン酸様キトサンを脱イオン水に溶解して、濃度が8mg/mLのキトサン溶液を形成し、
(2)EDTAを脱イオン水に溶解して、濃度が250mg/mLのEDTA水溶液を形成し、EDTAの水溶液とヒアルロン酸様キトサンとを等体積混合し、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を12mg/mLの濃度で上記混合溶液に溶解し、室温で13時間撹拌し続けるという点で、実施例2と相違する。
該実施例は、
(1)グリコールキトサンを脱イオン水に溶解して、濃度が5mg/mLのキトサン溶液を形成し、
(2)EDTAを脱イオン水に溶解して、濃度が100mg/mLのEDTA水溶液を形成し、EDTAの水溶液とグリコールキトサン溶液とを等体積混合し、混合溶液のPH=6.0に調整し、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を8mg/mLの濃度で上記混合溶液に溶解し、室温で15時間撹拌し続けるという点で、実施例2と相違する。
該実施例は、
(1)グリコールキトサンを脱イオン水に溶解して、濃度が10mg/mLのキトサン溶液を形成し、EDTAを脱イオン水に溶解して、濃度が300mg/mLのEDTA水溶液を形成し、EDTAの水溶液とグリコールキトサン溶液とを等体積混合し、
(2)グルタルアルデヒドの架橋剤を8.0mg/mLの濃度で上記混合溶液に溶解し、室温で14時間撹拌し続けるという点で、実施例2と相違する。
該実施例は、
(1)グリコールキトサンを脱イオン水に溶解して、濃度が10mg/mLのキトサン溶液を形成し、
(2)EDTAを脱イオン水に溶解して、濃度が100mg/mLのEDTAの水溶液を形成し、EDTAの水溶液とグリコールキトサン溶液とを等体積混合し、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミドの架橋剤を15mg/mLの濃度で上記混合溶液に溶解し、室温で14時間撹拌し続けるという点で、実施例2と相違する。
Claims (16)
- 歯科における脱灰に用いられ、好ましくは、象牙質の脱灰に用いられる、水溶性キトサンとアミノカルボン酸系金属キレート剤との抱合体。
- 前記アミノカルボン酸系金属キレート剤は、エチレンジアミン四酢酸、ヒドロキシエチルエチレンジアミン三酢酸、ジエチレントリアミン五酢酸、アミノ三酢酸、ジヒドロキシエチルグリシン、グリコールエーテルジアミン四酢酸、エチレンジアミン二酢酸、トリエチレンテトラミン六酢酸、シクロヘキサンジアミン四酢酸、1,4,7,10−テトラアザシクロドデカン−1,4,7,10−四酢酸、1,4,8,11−テトラアザシクロドデカン四酢酸から選ばれる1種又は2種以上の混合物であり、好ましくは、エチレンジアミン四酢酸であることを特徴とする、請求項1に記載の抱合体。
- 0.5〜1質量部の水溶性キトサン、10〜30質量部のエチレンジアミン四酢酸及び0.8〜1.5質量部の架橋剤を原料として製造されることを特徴とする、象牙質コラーゲン線維の脱灰材料。
- 前記抱合体又は象牙質コラーゲン線維の脱灰材料のpHは、中性又はアルカリ性であることを特徴とする、請求項1〜3のいずれか一項に記載の抱合体又は象牙質コラーゲン線維の脱灰材料。
- 前記水溶性キトサンは、グリコールキトサン、カルボキシメチルキトサン、キトサン塩酸塩、キトサン四級アンモニウム塩、キトサン硫酸エステル、キトサンオリゴ糖及びヒアルロン酸様キトサンから選ばれる1種又は2種以上の混合物であり、好ましくは、グリコールキトサンであることを特徴とする、請求項1〜4のいずれか一項に記載の抱合体又は象牙質コラーゲン線維の脱灰材料。
- 前記抱合体又は材料の遊離アミノ基含有量は、抱合反応前の水溶性キトサンに比べて15%未満、好ましくは1〜10%、より好ましくは3〜5%であることを特徴とする、請求項1〜5のいずれか一項に記載の抱合体又は象牙質コラーゲン線維の脱灰材料。
- 前記抱合体及び材料のMnは、40kDaより大きく、好ましくは60kDa〜300kDa、より好ましくは100kDa〜200kDaであることを特徴とする、請求項1〜6のいずれか一項に記載の抱合体又は象牙質コラーゲン線維の脱灰材料。
- 前記抱合体及び材料のMwは、100kDaより大きく、好ましくは200kDa〜800kDa、より好ましくは400kDa〜600kDaであることを特徴とする、請求項1〜7のいずれか一項に記載の抱合体又は象牙質コラーゲン線維の脱灰材料。
- 前記架橋剤は、1−エチル−3−(3−ジメチルアミノプロピル)−カルボジイミド、N−ヒドロキシコハク酸イミド、グルタルアルデヒド、ビスイミデート及びマレイミドから選ばれる1種又は2種以上の混合物であることを特徴とする、請求項3〜8のいずれか一項に記載の象牙質コラーゲン線維の脱灰材料。
- 請求項1〜9のいずれか一項に記載の抱合体又は材料と、
口腔応用上許容可能な助剤又は溶媒とを含む、歯科用の脱灰組成物。 - (a)請求項1〜10のいずれか一項に記載の抱合体、材料又は組成物と、
(b)歯科接着剤及び/又は修復剤とを含む、歯科接着修復用の試薬キット又は薬物キット。 - (a)修復が必要な歯の表面に、請求項1〜10のいずれか一項に記載の抱合体、材料又は組成物の有効量を適用することと、
(b)任意に前記抱合体、材料又は組成物を除去することと、
(c)修復が必要な歯の表面に、歯科接着剤及び/又は修復剤を適用することとを含む、歯科接着修復方法。 - 架橋剤の存在下で、水溶性キトサンとアミノカルボン酸系金属キレート剤とを混合して水溶性キトサンとアミノカルボン酸系金属キレート剤との抱合体を得ることを含むことを特徴とする、請求項1〜10のいずれか一項に記載の抱合体、材料又は組成物を製造する方法。
- 0.5〜1質量部の水溶性キトサンの水溶液と10〜30質量部のEDTAの水溶液とを混合し、0.8〜1.5質量部の架橋剤を混合溶液に溶解して室温で反応させることを含むことを特徴とする、請求項13に記載の方法。
- 濃度が5〜10mg/mLの水溶性キトサンの水溶液と濃度が100〜300mg/mLのEDTAの水溶液とを等体積混合し、混合溶液のPH=6.0に調整した後、濃度が8〜15mg/mLの量で架橋剤を加え、室温で12〜16時間反応させた後、透析法により未反応残留物を除去した後に凍結乾燥して、象牙質コラーゲン線維の脱灰材料を得ることを含むことを特徴とする、請求項13に記載の方法。
- 請求項1〜10のいずれか一項に記載の抱合体、材料又は組成物の歯科接着修復システムの製造における応用。
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