It may be thought that a good set of teeth starts in childhood, but this is not entirely true. The development of teeth is always “ahead”, the development of permanent teeth also begins when the mother is pregnant, and the development of milk teeth is in the early stage of the mother’s pregnancy, about the second month of pregnancy milk teeth embryo will begin to form, to five months of the fetus teeth began to calcify, if the lack of nutrition at this time, especially the lack of mineral salts (calcium, phosphorus, magnesium, fluorine ) and vitamins (D, A, C), etc., can cause incomplete enamel development, forming uneven tooth surface; if too much fluoride, it will also form enamel calcification disorders, forming plaque enamel teeth. Therefore, while it is important to supplement calcium or other minerals and microorganisms, it is even more important to have a reasonable diet, the reason why these substances cannot be reasonably applied is metabolic imbalance. For your child’s dental health it is also necessary not to be picky about food and to supplement fluoride deficiency or excess fluoride due to partial eating, or due to regional differences, under the guidance of a dentist. When dental problems are discovered after the teeth have been allotted, it is too late for supplementation. We know that the permanent teeth depend on the health of the baby teeth. Only the health of the baby teeth can give the permanent teeth under the baby teeth effective stimulation in the usual diet, so that the permanent teeth can develop healthily to replace the baby teeth, otherwise the teeth will be difficult to come out and the teeth will not be aligned. In order to make the milk teeth healthy, we really should have dental health awareness from the fetus.