Kato K
Department of Pedodontics, Faculty of Dentistry, Tokyo Medical and Dental University.
Kokubyo Gakkai Zasshi. 1991 Mar;58(1):243-52. doi: 10.5357/koubyou.58.243.
The purpose of this study was to investigate the relationship between the amount of fluoride in the enamel, taken from a fluoride-releasing sealant (F + sealant) and acid resistance. The F + sealant was applied to the bovine enamel from 1 week to 6 months. After the removal of the F + sealant, the bovine teeth were immersed in phosphate buffer from 1 month to 6 months. At each time period, the enamel was biopsied with acid and its fluoride and calcium concentration were analyzed. Results were as follows: (1) It was suitable to immerse the teeth in 1M KOH solution for 2 days in order to remove the loosely bound fluoride produced by the fluoride application from the enamel. (2) The amount of fluoride in the surface enamel increased in proportion to the application time of F + sealant. (3) The amount of calcium dissolved from the enamel showed the significant decrease by the F + sealant application, while no difference was shown by the application time. (4) The amount of fluoride in the surface enamel acquired by the F + sealant was maintained for 6 months after the removal of the F + sealant. (5) The amount of calcium dissolved from the enamel showed no difference in the period of immersion time.
本研究的目的是调查从含氟封闭剂（F + 封闭剂）获取的牙釉质中氟含量与耐酸性之间的关系。将F + 封闭剂应用于牛牙釉质1周 至6个月。去除F + 封闭剂后，将牛牙浸入磷酸盐缓冲液中1个月至6个月。在每个时间段，用酸对牙釉质进行活检，并分析其氟和钙浓度。结果如下：（1）为了从牙釉质中去除因涂氟产生的松散结合的氟，将牙齿浸入1M KOH溶液中2天是合适的。（2）表层牙釉质中的氟含量与F + 封闭剂的应用时间成比例增加。（3）F + 封闭剂的应用使从牙釉质中溶解的钙量显著减少，而应用时间未显示出差异。（4）去除F + 封闭剂后，F + 封闭剂在表层牙釉质中获取的氟含量维持6个月。（5）在浸泡时间段内，从牙釉质中溶解的钙量没有差异。
