Some dentist said that young people's teeth are getting worse and worse nowadays. They like to drink carbonated drinks and don't brush their teeth properly. In China, dental health is not often mentioned, many people brush their teeth haphazardly but usually drink carbonated beverages, and over time, their teeth are prone to erosion. Many people go to see dentists only when they have a toothache, but it is too late. A toothache is the feature of the tooth decaying to the dental nerve.