Toothbrush is used to clean teeth, maintain oral hygiene special tools, good choice, can brush the teeth thoughtful and clean, bad choice, not only can not brush the teeth a net, and even damage oral health. The correct purchase of toothbrushes must pay attention to the following issues: 1, according to the use of the object to buy toothbrushes according to the adults, children, children’s mouth size is different, China’s toothbrush standards specify the size of the brush head. Adult toothbrushes are larger, smaller children’s toothbrushes, young children’s toothbrushes are the smallest. The maximum length of the bristle surface does not exceed 42 mm, the height of the bristles does not exceed 13 mm, the diameter of the brush wire between 0.2 to 0.3 mm, these are generally indicated on the toothbrush packaging, buy toothbrushes, just pay attention to see, you can buy the right size toothbrush. 2, it is advisable to buy a small head toothbrush Different types of toothbrushes have different specifications. Brush head have size, in order to let the brush head can brush every part of the mouth, it is generally appropriate to use a small head toothbrush. 3, bristle toothbrush can avoid stabbing gums In addition to tooth-shaped toothbrush, the use of bristle toothbrush can effectively achieve oral health purposes. Its outer packaging generally live with the word “bristle”, touch the end surface of the bristles, no sharp, burr and other feelings. 4, to pay attention to the appearance and price from the outside to see the toothbrush clean, smooth bristles, tightly packaged products, the quality is more reliable. For those without origin, no quality certification of the toothbrush, should not be purchased and used. From the price point of view, buy 3 to 6 yuan a toothbrush is fine. 5, toothbrush use time not more than 3 months According to oral hygiene requirements, a toothbrush use time is best not more than 3 months. Maybe toothbrush with 3 months its appearance is not damaged, but the bristles have hidden a certain number of bacteria, oral health care is not good.