Dental caries in 14 year olds are caries in young permanent teeth. Depending on the caries condition, treatment is carried out by fluoride application and surgery. 1. Fluoride application: Early stage, such as demineralized teeth, is treated by fluoride application. Fluoride application is a preventive method as well as a therapeutic method. It changes the oral cavity from a caries-causing to a non-caries-causing state. Terminate the development of caries. 2. Surgery: If the caries hole is relatively shallow, clean the caries hole by minimally invasive method. Fill with material to terminate caries progression. If there are deeper caries and closer to the nerves, the living pulp should be preserved as much as possible, and indirect pulp capping and direct pulp capping should be used, and then filling should be carried out. Usually need to help the child to develop the habit of proper cleaning of the oral cavity, the child caries, need to seek medical treatment as soon as possible, so as not to delay the condition.