0-Pre-eruption of milk teeth (generally about 6 months after birth) Oral health care should start at birth. Before teeth eruption, after each feeding to the baby, then feed a few mouthfuls of plain water, in order to rinse the residual food, if necessary, parents can put sterilized cotton or gauze on the finger dipped in water after the baby’s oral cavity of the tongue and gums at the milk crumbs wiped clean, to reduce oral bacterial breeding, which can reduce or delay the occurrence of caries. 6 months – 1.5 years Parents sit on the edge of the sofa or bed and let the toddler lie in the parent’s arms. Use one hand to hold the child’s head and lips in place. With the other hand, hold a clean gauze or a finger toothbrush for infants and children and dip it in warm boiled water to clean the outer and inner sides of the child’s teeth. 1.5 years – 3 years Children can begin to use a toothbrush during this period, but brushing is mainly done by adults. Children can stand upright or sit on a chair or stool. With the mother or other parent behind or to the side of the child, hold the child’s head in place with one hand, and brush the child’s teeth (without toothpaste) with warm water using the child’s toothbrush in the other hand in the following order: 1. front teeth, back teeth on the outside – hold the toothbrush at a 45-degree angle to the teeth, and start from the gum line, brushing back and forth gently and in small increments. 2. back teeth on the inside – brush the front and inside of the back teeth. 3. back teeth on the inside of the teeth – brush the front and inside of the back teeth. 2. back teeth inside – brush the range should be small, brushing action to form a certain degree of curvature; 3 front teeth inside – to keep the toothbrush and teeth perpendicular to the toothbrush head up and down brushing; 4. chewing surface – flat hold the toothbrush, brushing gently; each side to be brushed 15 to 20 times, in order to achieve the purpose of cleaning the teeth. During this period, parents should pay attention to cultivate children’s interest in brushing, so that children from childhood to develop good oral hygiene habits, will benefit for a lifetime. Children should start brushing their own teeth under the guidance of an adult. The method is the same as above, but they still need the help of an adult to brush their teeth clean. In addition to the above methods of surface cleaning, there is another point that needs to be brought to the attention of parents is the baby’s interdental cleaning. Because of their unique anatomical shape, baby teeth are prone to food impaction. In addition, there are physiological gaps in the milk teeth, which are also prone to food impaction. Parents and children should learn how to use dental floss, which can easily remove embedded food debris, keep the interdental space clean and prevent tooth decay. Good luck to all the kids with healthy teeth!