随着科技的发展,人们发现了氟化物可以防龋的作用,并且多年实践证明,氟化物与牙齿接触后,使牙齿组织中易被酸溶解的氢氧磷灰石形成不易溶的氟磷灰石,从而提高了牙齿的抗腐蚀能力。有研究证明,常用这种牙膏,龋齿发病率降低40%左右。但是口腔专家提醒消费者,3岁以前的儿童应禁止? With the development of science and technology, people find the fluoride can prevent caries, and many years of practice have proved that fluoride contact with the teeth, the tooth tissue is easy to acid-soluble hydroxyapatite insoluble insoluble phosphorus phosphorus Stone, thereby improving the resistance of teeth to corrosion. Studies have shown that commonly used toothpaste, the incidence of dental caries decreased by about 40%. However, oral experts remind consumers that children 3 years of age before should be banned?