Many tiny parents will inadvertently see the baby’s teeth have a few needle tip size black spots or see a black line on the molar, or even a large large black material, but the baby will not feel pain, I believe that many mothers will be more confused about these black substances in the end what is the thing? There are two possibilities for the appearance of black material on teeth without pain. One is pigmentation, such as smoke stains, tea stains, coffee stains, etc. Generally, this kind of pigmentation is mostly seen in adults, and it is difficult to brush off by brushing, which can be removed by cleaning. The other is that the teeth have deep or shallow caries, which appears as a black spot from the outside, usually located in the fossa pitting (a point or line depression on the surface of the tooth). The culprits of dental caries (also known as tooth decay) are certain bacteria in the mouth, but it takes time for them to destroy the teeth, from the initial discoloration to the eventual formation of a cavity, which usually takes one and a half to two years. During this time, it is entirely possible to nip decay in the bud by parents paying more attention to their baby’s teeth. Once a small black spot on the tooth is recognized as caries it should be repaired as soon as possible to stop the progression of the lesion. If allowed to continue to develop will become obvious cavities, then it will be sensitive to hot, cold, sour and sweet food stimuli; when the damage further reaches the pulp (i.e., the common people say “dental nerve”), it will be intolerable pain, seriously affecting daily life. Clinically, many people will wait until the toothache is too much to bear before going to the hospital. At this time, usually can not rely on simple to solve the problem, may also need to do root canal treatment or even extract the affected tooth, denture repair, time-consuming and expensive, people also suffer, can be described as “a small hole is not mended, the big hole suffered”. How to take care of your teeth in daily life? 1, the correct daily brushing method Every day with 10 minutes to brush your teeth, morning and evening each 5 minutes. If possible, use dental floss to clean between teeth after brushing. Clean your teeth every six months to a year in a professional medical institution, because there are some places that a toothbrush cannot reach. 2, rinse your mouth after eating The acidity in the mouth after eating will increase leading to tooth erosion, and carbonated beverages will double the damage. After eating, you can use warm water or tea to rinse your mouth to reduce the harm of food debris and bacterial erosion of teeth, you can also chew xylitol gum, chewing action to increase salivary secretion, neutralize the acidity of the mouth. 3, drink more water 70% of the human body consists of water, drink more water not only to maintain good health, but also to stimulate salivary secretion, neutralize acidity, kill bacteria, improve the cleanliness of the mouth, curb the growth of bacteria. Precautions to protect the teeth 1, choose the color of food should be light rather than dark, to reduce the pigment stays on the surface of the teeth; 2, you can eat some onion, garlic and ginger, it can be bactericidal and anti-inflammatory in the mouth, if you don’t like the taste, you can use a light green tea to gargle; 3, try to use a straw when you drink drinks, so as not to let the harmful substances come into contact with the teeth. Therefore, usually should pay attention to inspect the baby’s teeth, observe the changes in tooth color, shape, texture, but also regularly to the specialist hospital for a comprehensive oral examination, if there is caries, it should be early detection and early treatment.