Effective brushing is an important means to remove plaque and maintain oral hygiene. The cariogenic bacteria in the mouth attach and gather on the tooth surface to form plaque, which is the key to the occurrence of caries and provides the microenvironment for demineralization. To develop the good habit of brushing teeth every day, use the correct brushing method and choose the appropriate tooth cleaning agent, you can effectively control the plaque. The earlier you start brushing, the better. When the baby’s teeth first appear around 6 months old, parents should gently wipe the baby’s mouth with a cotton swab or gauze after each feeding. As the child grows older and teeth erupt, gradually switch to using finger toothbrushes and child health toothbrushes to clean the mouth. Preschool children should be brushed by their parents until about 7 years old when the child is capable of brushing his or her own teeth. There are many ways to brush teeth, which should be chosen according to different ages and different individual situations. Preschoolers should master the following methods: brush the upper teeth downward, brush the lower present teeth upward, brush the biting surface back and forth, and brush each tooth surface 10 times. Brush for at least three minutes each time, twice a day in the morning and evening, especially in the evening before going to bed is more important. You should choose a health toothbrush. Children’s health care toothbrushes are characterized by small brush heads, reasonably arranged bristles, and easy to grip handles, making it easy to clean each tooth flexibly deep in the mouth. In addition, the top of the bristles are abraded to effectively clean the teeth without damaging the gums. Toothbrushing should be done with fluoride toothpaste for children. However, since children swallow more or less toothpaste every time they brush their teeth, the younger they are, the greater the amount they swallow, which can cause excessive fluoride intake over time, which is not good for health, so the use of fluoride toothpaste starts at the age of 4. Children under 4 should not use toothpaste, just dip them in water and brush.