Toothbrush selection: 1, brush head: the full length of the toothbrush to 12 ~ 13 cm is appropriate; toothbrush head length of about 1.6 ~ 1.8 cm, width of no more than 0.8 cm, height of no more than 0.9 cm; 2, brush handle: to be straight and moderate thickness in order to be held by the child; toothbrush head and handle called the neck, should be slightly fine; 3, bristles: toothbrush bristles should be soft and hard, flexible, bristles are too soft can not play Cleaning role, the hair is too hard and easy to hurt the gums and teeth, while the hair surface should be flush or wavy, the head should be rounded by the grinding process. Without rounded bristles is not good for teeth and dental caries. Toothbrush maintenance: In the use of toothbrush should pay attention to each use after the toothbrush clean, shake dry the brush head up, put in the mouth cup, in order to keep the brush head dry, reduce the breeding of bacteria. Toothbrush should be replaced regularly, it is best to change 1 time a month in the summer, the rest of the season should also be 3 months to change 1 time. If the bristles are curled, they should be replaced immediately to prevent scratches on the teeth. The choice and use of toothpaste should pay attention to the following aspects: 1, choose the toothpaste that does not produce too much foam. 2, choose the child’s favorite aromatic, less irritating toothpaste. 3, reasonable use of fluoride and drug toothpaste, fluoride is currently recognized as the best drug to prevent dental caries, it enhances the anti-acid ability of teeth, promote tooth remineralization, play the purpose of health care teeth, prevent dental caries. Using fluoride toothpaste to brush teeth is one of the most simple and easy ways to health care teeth.