The CO_3^<2-> Variation of Enamel Crystals on Uptake of F^-Ion

牙釉质晶体吸收F^-离子时CO_3^<2->的变化

• 批准号: 02670928
• 负责人: MIYAZAWA Chyuzo
• 金额: $ 0.26万
• 依托单位: Ohu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02670928/
• 关键词: enamel; F^- ion; CO_3^<2-> ion; CO_3^<3-> radical

CO_3^<2-> containing about 2.0-3.7% of enamel formed stable CO_3^<3-> radical receiving irradiation of radiant ray. The fluoride solution was acted to the enamel of permanent tooth after irradiation of gamma ray. And we observed the variation of CO_3^<3-> radical associated with uptake of F^-.As for F^- uptake of enamel, F^- concentration of fluoride solution revealed about 1000ppm at 50 and 100ppm F^-, and about 2000ppm at 500 and 1000ppm F^-. The volume of F^- uptake was increased by a high reactive concentration. However, CO_3^<2-> of enamel was decreased by about 16% at 50-100ppm F^- and 4% at 500-1000ppm.As for ESR signal intensity of CO_3^<3-> radical of enamel using 100ppm F^-, each radical rate of 1.2% (10^4 R gamma irradiation) and 100%(10^7 R gamma irradiation)was decreased significantly compared with each one prior to an action.CO_3^<2->/F^- of enamel revealed a secondary functional curve associated with uptake of F^-. From this reason, it was suggested that we could define the appropriate conditions in applying fluoride.

牙<2->釉质中含有2.0-3.7%的CO_3 ~（2+），<3->在辐射线照射下，牙釉质中形成稳定的CO_3 ~（2+）自由基。将氟化物溶液作用于γ射线照射后的恒牙釉质。在<3->氟离子浓度为50和100 ppmF ^-时，牙釉质的F ^-浓度约为1000 ppm，而在500和1000 ppmF ^-时，牙釉质的F^-浓度约为2000 ppm。F^-吸收量随反应浓度的增加而增加。100 <2->ppm F ^-照射后，牙釉质CO_3 ~（2-）自由基ESR信号强度分别<3->为1.2%（10^4 R γ照射）和100%（10^7 R γ照射），与照射前相比，均显著降低，牙釉质CO_3 ~（2-）<2->/F^-呈现与F^-摄取相关的二级函数曲线。因此，建议在施肥时，应明确适宜的施氟条件。

项目成果

宮澤 忠蔵,国分 美和子,結城 昌子,窪田 明久,清水 秋雄: "エナメル質のフッ素イオン取り込みと結晶内CO_3^<2->挙動,炭酸ラジカル計測による検討" 口腔衛生学会雑誌. 41. 486-487 (1991)

Chuzo Miyazawa、Miwako Kokubun、Masako Yuki、Akihisa Kubota、Akio Shimizu：“牙釉质中氟离子的吸收和晶内 CO_3^<2-> 行为，通过碳酸自由基测量进行的调查”口腔健康学会杂志 41. 486-487。 (1991)

Midori IWASAKI,Chyuzo MITYAZAWA Tatsuya SHIMANO: "Relation Between the Weight of Human Tooth Enamel and the CO_3^<3-> Signal Intensity on the ESR Dosimetry" Ohu Univercity Dental Journal. 17(2). 95-100 (1990)

Midori IWASAKI、Chyuzo MITYAZAWA Tatsuya SHIMANO：“人牙釉质重量与 ESR 剂量测定中 CO_3^<3-> 信号强度之间的关系”Ohu Univercity Dental Journal。