Fluoride toothpaste is better, the fluoride contained in it can increase the ability of teeth to resist decay and prevent the occurrence of caries. The local application of fluoride can interact with hydroxyapatite in the enamel and form fluorapatite which is more insoluble in acid, enhance the resistance of enamel to acid, and then increase the ability of teeth to resist caries. At the same time, the increase of fluoride ion concentration can also promote the remineralization of teeth, and to the early caries, it can also terminate or make it remineralize, and prevent the further occurrence and development of caries. Therefore, fluoride toothpaste has a lot of benefits for teeth, and some early caries should be treated by applying fluoride in clinical practice, so it is recommended to apply fluoride toothpaste. Sometimes, fluoride toothpaste is not recommended for children or younger children because of the risk of swallowing toothpaste, which may lead to the risk of dental fluorosis. However, the amount swallowed or the amount of fluoride contained in the toothpaste has very little chance of forming dental fluorosis or potentially causing fluorosis.