Bleaching of a tooth is caused by oxygen radical-Mechnism of bleaching of a tooth and influence to dentin of super oxygen-

牙齿漂白是由氧自由基引起的-牙齿漂白的机理及超氧对牙本质的影响-

• 批准号: 14571863
• 负责人: KAWADA Eiji
• 金额: $ 1.86万
• 依托单位: Tokyo Dental College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14571863/
• 关键词: Vital tooth; Breaching; Hydrogen peroxide; Super oxide; Hydroxyl radical; metal ion; Dentin; Enamel; 過酸化物; 歯の漂白剤; 過酸化水素の光分解; 遷移金属; EPMA(XMA)X線マイクロアナライザー; Fenton反応、Fenton様反応; ヒドロキシル ラジカル; ヒドロペルオキシ ラジカル; 過酸化尿素; 光照射器(長波長紫外線・可視光線); ヒト抜去歯; ル

An artificial root canal was prepared using the crown of human incisors filled with phosphate buffer solution. This research was to clarify the effects of peroxide on teeth after the tooth-whitener-application. Tooth-whitener containing 30% hydrogen peroxide or 35% carbamide peroxide was applied according to the instructions with or without acid-etching pretreatment. Luminol-chemi luminescence was used to measure the quantity of peroxide that penetrated into the buffer within the root canal.As a result of we used high density hydrogen peroxide water for the humans tooth crown of a tooth part which we gave the artificial root canal which we devised to and bleached it, and having operated it, a large quantity of hydrogen peroxides were measured between root canals. We mean that this passes the enamel that a hydrogen peroxide is a makeup of a tooth, dentin by bleaching operation and seeped.We observe a change of morphology of a minute organization by observation of a percent section of a tooth after bleaching.I recognize some changes, but there is not it in the situation that I can conclude to be it yet. However, a large quantity of dissolution of a dentin ingredient was recognized in immersion of a tooth to the hydrogen peroxide water. A makeup of dentin dissolves by bleaching, and this thing suggests the possibility that, meanwhile, I go through a chance, and a bleach arrives at to a pulp cavity, a root canal.

使用充满磷酸盐缓冲溶液的人门牙牙冠制备人工根管。这项研究旨在阐明使用牙齿美白剂后过氧化物对牙齿的影响。根据说明使用含有 30% 过氧化氢或 35% 过氧化脲的牙齿美白剂，并进行或不进行酸蚀预处理。使用鲁米诺化学发光来测量渗透到根管内缓冲液中的过氧化物的量。由于我们对人类牙冠部分使用了高密度过氧化氢水，因此我们给予了人工根管，我们设计并漂白了它，并进行了操作，在根管之间测量了大量的过氧化氢。我们的意思是，过氧化氢通过漂白操作渗透到牙齿构成的牙釉质、牙本质。我们通过观察漂白后牙齿的百分之一部分来观察微小组织的形态变化。我认识到一些变化，但是目前还没有我可以断定的情况。然而，在将牙齿浸入过氧化氢水中时，发现牙本质成分大量溶解。牙本质的化妆用漂白溶解，同时，这个东西暗示漂白剂到达牙髓腔、根管的可能性。

项目成果

An evaluation of the penetration of peroxide from tooth-whitene

牙齿美白剂中过氧化物渗透性的评价

• 发表时间: 2003
• 期刊: Biomedical Research Vol.24
• 作者: K.YAZAKI;E.KAWADA;Y.ODA
• 通讯作者: Y.ODA

河田 英司, 矢崎 欽也: "漂白剤の歯髄への浸透"The Journal of Dental Engineering. 143. 21-24 (2002)

Eiji Kawata、Kinya Yazaki：“漂白剂渗透到牙髓中”《牙科工程学杂志》143. 21-24 (2002)。

Kinya Yazaki, Eiji Kawada, Yutaka Oda: "An evaluation of the penetration of peroxide from tooth-whitener"Biomedical Research. Vol.24 No.6. 325-330 (2003)

Kinya Yazaki、Eiji Kawada、Yutaka Oda：“牙齿美白剂过氧化物渗透性的评估”生物医学研究。

An evaluation of the penetration of peroxide from tooth-whitener

牙齿美白剂中过氧化物渗透性的评估

• 发表时间: 2003
• 期刊: Biomedical Research Vol124,No6
• 作者: K.YAZAKI;E.KAWADA;Y.ODA
• 通讯作者: Y.ODA