Experts say that before brushing your teeth, make sure you choose a good quality toothpaste and toothbrush. Children should choose 2-3 rows, each row of 3-4 bundles of bristles, flat-topped toothbrush is good. The brush head should be shorter and narrower, the gap distance between each bunch of bristles should be larger, the softness of the bristles should be moderate, and the bristles should be brushed. Children should use children’s toothbrushes with softer bristles. Meet the above conditions called health care toothbrush, this toothbrush head is smaller, suitable for partition brushing, rotating brush movement flexible and convenient effective contact area, reducing the dead zone of the bristle area; hair bundle between the appropriate distance, so that it is easy to wash and keep clean; the height of the bundle of hairs is appropriate, was cylindrical, can prevent the gums were pierced or scratched and so on. In addition, it is very important to keep the toothbrush clean and hygienic, otherwise, a large number of bacteria propagated on it will be unfavorable to the body and oral health. After brushing your teeth, wash your toothbrush several times with water, shake it dry and place it in a dry and ventilated place with the head up. Avoid placing the head of the toothbrush upside down in the mouthwash cup, so that the toothbrush in the humid environment is easy to make bacteria multiply. It is best to change a new toothbrush in about 3 months to really play the role of the toothbrush. Elderly people should choose a long and straight toothbrush, the middle part of the handle is slightly upward curved. And has a certain degree of flexibility, easy to grasp and use. The head of the toothbrush should be short and narrow, and rotate flexibly in the mouth. Toothbrush bristles have bristles and nylon filament two kinds, according to the teeth, periodontal health and habits of hobby choice. But no matter which kind, should have a certain degree of flexibility and hardness. Bristles too soft is not easy to remove dirt; too hard on the teeth and gums have damage. The elderly should choose a slightly soft bristle toothbrush, the best choice of pig bristle toothbrush. Toothbrush bristles should be 2 to 3 rows, each row of 6 to 8 bundles, the distance between the bundles of bristles should be appropriate to maintain the cleanliness of the toothbrush.