体外局部应用后氟斑牙人牙釉质表面及内部的氟摄取情况
Fluoride acquisition on and in fluorotic human enamel after topical application in vitro.
作者信息
Cruz R, Ng'ang'a P M, Ogaard B, Valderhaug J
机构信息
Department of Preventive Dentistry, Faculty of Dentistry, State University of Rio de Janeiro, Brazil.
出版信息
Scand J Dent Res. 1993 Feb;101(1):5-8. doi: 10.1111/j.1600-0722.1993.tb01637.x.
The uptake of alkali soluble and alkali insoluble fluoride on and in fluorotic enamel was investigated in vitro. Teeth from Kenya, assigned score 3 in accordance with Thylstrup-Fejerskov's fluorosis index, were used. The enamel was treated with either a neutral 2% NaF solution, a 0.2% NaF solution (pH 5.5), or the supernatant from a 0.1% NaF-containing toothpaste (pH 7). The treatment time was 1 h. The reaction product formed on the enamel was analyzed by KOH extraction and acid etching. Significantly higher amounts of alkali soluble fluoride were formed on the enamel from the 2% and 0.2% NaF solutions, as compared with the control. There was also a significant increase in the firmly bound fluoride after treatment with the neutral 2% NaF solution.
体外研究了氟斑牙釉质内外对碱溶性和碱不溶性氟化物的摄取情况。使用了来自肯尼亚的牙齿，根据蒂尔斯楚普-费耶斯科夫氟中毒指数评定为3分。牙釉质分别用中性2%氟化钠溶液、0.2%氟化钠溶液（pH 5.5）或含0.1%氟化钠牙膏的上清液（pH 7）处理。处理时间为1小时。通过氢氧化钾萃取和酸蚀刻分析牙釉质上形成的反应产物。与对照组相比，2%和0.2%氟化钠溶液处理的牙釉质上形成的碱溶性氟化物量显著更高。用中性2%氟化钠溶液处理后，牢固结合的氟化物也显著增加。
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