Analysis of the condition: the teeth turn black, which may have the following reasons. 1。 Pulp necrosis; 2。 Dental caries; 3。 Exogenous pigmentation. According to your description, it may indeed be the third case. Usually, you should eat less chocolate and other foods that are easy to cause tooth coloring. Traditional Chinese medicine can also color teeth. Prevention: Mother puts a piece of soft gauze on her finger, dips it with clear water or light salt water after each meal, and even rubs a little toothpaste to gently scrub his small tooth surface, which not only cleans the mouth, but also helps the growth of teeth. Try not to eat sweets after going to sleep at night, and feed some boiled water after meals. ? When two or three-year-old children know how to brush their teeth, parents should first brush their teeth in the morning and evening, take their children with them every time they brush their teeth, pay attention to the quality of their children's brushing, and gradually cultivate habits so that children can have trust in their parents.

Guiding opinions:. Moreover, children's toothbrushes must be soft, the handle should be grasped well, the brush head size should be suitable for children's mouths, small activities should be flexible, and the brushing parts should be more thorough. At the same time, don't let the baby use adult toothpaste, which is easy to hurt the oral mucosa. If you use fluoride toothpaste, the size of soybean is fine, so be careful not to swallow it by mistake.