In fact, the bristles of toothbrushes are covered with a lot of bacteria that we can't see with the naked eye, but they are the culprit of dental disease. How to get rid of these annoying little goblins? This requires us to thoroughly clean the toothbrush, clean the food residue and dirt on it, dry it, put it in a separate cup, and avoid contact with other people's toothbrushes to avoid cross infection. Put the brush head up in a dry and ventilated place. We should also pay attention to the condition of the bristles. Once deformed, curled, or damaged, the cleaning ability of the toothbrush will deteriorate, and it may scratch the gums, causing bleeding and gingivitis, so it should be replaced in time. Even if the toothbrush is used well, it should be replaced no more than three months in order to avoid the growth of too many bacteria.

 

When choosing a toothbrush, it is recommended that you choose a toothbrush with a small head and soft bristles. The size of the brush head and the hardness of the bristles are also important. The toothbrush head can usually cover the two front teeth. We can choose according to the age in the supermarket. The brush head for 0-2 years old is about 15 mm long, the brush head for 2-6 years old is about 19 mm long, and the brush head for 6-12 years old is about 19 mm long. The brush head is about 22mm long, and over 12 years old is about 25mm long. The brush head should not be too long, otherwise it will be difficult to clean the back half of the oral cavity. The width should not exceed four rows of bristles. The top of the brush head is oval, which is easy to operate. The material of the bristles should be soft and thin nylon. Silk, the top of the bristles is polished, wear-resistant and easy to dry, the softness of the bristles should be moderate, too hard will damage the tooth tissue, too soft and not easy to clean. The handle of the toothbrush should be more comfortable to hold, elastic and non-slip.