アブストラクト（21巻1号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Effect of Fluoride on Rehardening of Artificially Softened Bovine Enamel
Subtitle　： ORIGINAL ARTICLES
Authors　： Emiko Nakajima
Authors（kana）　：
Organization　： Department of Dental Health and Public Health, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 21
Number　： 1
Page　： 16-24
Year/Month　： 1993 / 3
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] The purpose of this study is to provide additional information on various treatment times (1, 5, 10, 30, 60 min) and fluoride concentration (1, 5, 10, 50, 100, 1,000 ppm) of solution used for artificially softened bovine enamel prior to remineralization in vitro. Microhardness measurement used in this study can provide complementary information on remineralization. All bovine enamel slabs were exposed to acid softening solution (0.1M lactic acid containing 1% sodium carboxymethylcellulose, 3mM calcium and 1.8mM phosphate; pH 5.0) at 37℃ for 72 hrs. Each slab was immersed in the rehardening (calcifying) solution for 24 hrs after nonfluoride (control group) or fluoride treatment (fluoride group). Microhardness measurements were performed prior to acid-softening, after acid-softening and after rehardening treatments. The changing rate (the total rehardening percentage of softened enamel) in the control group was only 4.17%, but the rates in the fluoride group were very high. In addition, these values increased gradually in proportion to the fluoride treatment time and fluoride concentration of treatment solution. From the results in the present study, pretreatment of fluoride appeared to accelerate the effect of the calcifying solution and rehardening of the softened enamel surface.
Practice　： Dentistry
Keywords　： Fluoride, Pretreatment, Rehardening, Artificially Softening, Bovine Enamel