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据研究:接受正畸固定矫治而未用氟化物做口内预防的患者,50%口内出现白点,釉质脱矿明显。因此,托槽周围、带环内用氟化物做合理预防是有必要的。常用的氟化物是氟化钠(NaF)。目前氟化物抗龋的最普遍解释是:在釉质内形成羟基氟磷灰石(fluorhydroxyapatite)。本实验目的是研究正畸治疗时氟化物对病损发展的影响;pH值很低的氟化物的静龋作用(cariostatic effect);病损形成后氟化物对其影响。方法一组年龄在11～14岁,因正畸治疗需要拔除前磨牙的儿童。将其分成若干受试组,每组接受一种试验。口内带环设计同前,以便产生致龋环境。每组实验
According to the study: Orthodontics fixed orthodontics without fluoride in oral prophylaxis patients, 50% of the mouth white spots, enamel demineral significantly. Therefore, brackets around the ring with fluoride to do reasonable prevention is necessary. Commonly used fluoride is sodium fluoride (NaF). The most common explanation for the current fluoride resistance to caries is the formation of fluorhydroxyapatite within the enamel. The purpose of this experiment was to investigate the effects of fluoride on lesion development during orthodontic treatment; cariostatic effects of fluorides at very low pH; and the effect of fluoride on lesion formation. Methods A group of children aged 11 to 14 years old with premolar removal due to orthodontic treatment. Divided into several groups, each group receiving one test. Belt ring design with the former in order to produce cariogenic environment. Each experiment