I. How do I brush my child’s teeth? It is internationally recommended that teeth should be brushed daily with fluoride toothpaste from age 0 to death. From birth to the time when all the milk teeth erupt. You can use gauze, cotton swabs, finger toothbrushes, etc. to help infants and toddlers clean their mouths, and then you can gradually transition to a regular toothbrush when the toddler grows up slowly. When they are especially young, they can just brush their teeth without toothpaste, and the toothbrush can be brushed with some plain water. Children under 3 years old do not need fluoride toothpaste, and children around 2 years old generally cannot control their swallowing well and will not spit, but will involuntarily swallow toothpaste, so they need to strictly control the amount, and use rice grain size fluoride toothpaste. Children are small and will not spit toothpaste froth, and can not hold off brushing, parents must help children brush their teeth. Wait until the child can control swallowing and spit out the foam in the mouth. It is recommended to brush teeth once or twice a day, using a pea-sized amount of toothpaste (about 0.25 grams) each time. After brushing, excess toothpaste should be spit out or rinse the mouth with water to reduce swallowing of toothpaste. If you can spit, you can use fluoride toothpaste to prevent caries without special precautions like adults. Second, should I use electric toothbrush for my child? The cleaning effect of electric toothbrush is basically no different from that of manual toothbrush, which can remove 70-80% of plaque at most. Of course, the efficiency of electric toothbrush is high, for example, 1 minute of brushing with electric toothbrush is almost the same as 2 minutes of brushing with manual toothbrush. Children are in learning stage, it is not recommended to use electric toothbrush to brush teeth. Third, a family of young and old share a tube of toothpaste? Wrong, toothbrushes have a lot of bacteria stuck on them, and this bacteria comes out of your mouth. Squeezing one toothpaste back and forth on different toothbrushes may cause cross infection. It is recommended that everyone has their own toothbrush and toothpaste! Fourth, be sure to floss! Flossing is a must, and children over 3 years old can floss. In our country, the daily brushing rate is very high, reaching about 90%, basically everyone has developed the habit of brushing their teeth every day. However, brushing can remove at most 70-80% of plaque, and the plaque in the cracks of the teeth is basically not cleaned, so you must floss. V. How to strengthen the anti-caries ability of children’s teeth? When children are 6-7 years old, the first permanent teeth that erupt are easy to be decayed. Children’s sulcus closure is a technique that can effectively enhance the anti-caries ability of teeth for children when their teeth are developing. 1.After children’s teeth erupted and reached the occlusal plane, it is suitable to do the sulcus closure, generally within 4 years of eruption. 2.Milk molar is 3-4 years old, the first permanent tooth is 6-7 years old, the second permanent molar is 11-13 years old, and the bicuspid is 9-13 years old. 3.For children with disabilities who have poor oral hygiene, although they are older or have been erupting from the oral cavity for a longer period of time, they can consider relaxing the age of fossa closure.