When a child is born, there are no teeth in the mouth. A normal baby starts teething at an average of six months of age, and the incisors in the lower jaw begin to erupt, increasing at a rate of one tooth per month to about one year of age (twelve months) with six teeth. Until 2.5 years of age, all the baby’s milk teeth will erupt, and all 20 milk teeth will come in. Within 1 year after birth (1.5 months-11 months), all the enamel of the baby’s milk teeth will be mineralized. Therefore, if the child has a systemic or local disorder disease within 1 year after birth, it will affect the development of the enamel of the milk teeth and lead to dental development defects and susceptibility to dental caries. All milk teeth erupt within 2 years after birth (6 months – 24 months). See what nutritional elements your baby needs during the teething period: 1. Calcium: shrimp, bones, kelp, nori, fish pine, egg yolk powder, milk and dairy products. Calcium is the main component of the teeth, less it, the baby teeth will not grow. 2, protein: all kinds of animal food (such as meat, fish, eggs, etc.), milk and dairy products contained in the protein is high-quality protein. Among the plant foods, beans (especially soybeans) contain more protein. It also plays an important role in the formation, development, calcification and eruption of teeth. 3.Fluorine: sea fish, tea, honey. Chewing fluoride-rich food and brushing with fluoride toothpaste can prevent the erosion of teeth by acid produced by bacteria and inhibit the growth of bacteria by inhibiting the enzymes in bacteria. 4, phosphorus: phosphorus is widely distributed in food, meat, fish, milk, beans, cereals, and vegetables. Phosphorus can make the small milk teeth indestructible. 5, vitamin a: cod liver oil preparations, fresh vegetables. It can maintain the health of the gum tissue. 6, vitamin c: fresh fruits such as oranges, grapefruit, kiwi, and fresh dates. Vitamin c is needed for the formation of tooth enamel. 7, vitamin d: cod liver oil preparations, in addition, sunlight exposure to the skin can make the body synthesize its own vitamin d. Lack of vitamin d can cause baby teeth underdevelopment and poor calcification. So during the child’s teething, the above nutritional elements can not be missing oh.