Patient: description of the condition (onset time, main symptoms, hospital visit, etc.): more than 2 years old when I found that my son’s teeth have become very dark, at the beginning of the outside layer of uranium fell off, so I rushed to see the doctor. But it still didn’t come in time. Half of the child’s teeth fell out. Dental Hospital Children’s Dentistry: Hello, because severe caries can further develop into endodontics or even periapical disease, which may affect the development of inherited permanent teeth in severe cases, and the pain will affect the baby’s diet and life, which may in turn affect physical health. Your baby is relatively young, the development of permanent teeth is still unstable, and there is still a long time to go before the replacement of teeth, so it is recommended to actively treat it.