10 year old teeth bad rotten empty, mostly caused by caries, is the formation of deep caries manifestation, that is, the old people say worm teeth, tooth decay. Need to be based on 10-year-old children have been the end of tooth replacement to do a specific analysis, it is recommended to timely medical treatment, to the regular dental hospital for a detailed examination, according to the degree of development of caries, as well as the child’s personal physical condition, etc. design individualized treatment plan.1, not teeth: before the replacement of teeth, damaged teeth for milk teeth, can be removed by the doctor caries decay of the tooth parenchyma. For teeth that are already inflamed, root canal treatment can be carried out, followed by filling and restoration to avoid affecting the development of the surrounding teeth. If the affected tooth has been loosened, it can be extracted. 10-year-old children are in the period of tooth replacement, and new teeth can be grown soon; 2. Replaced teeth: the replaced teeth belong to the permanent teeth, and it is necessary to observe the situation of the crowns, such as daily pain in the affected teeth, discoloration of the crowns, and unresponsive to stimulation, the pulp has been necrotic or accompanied by apical periapical inflammation. Root canal treatment or apical induction plasty, etc. is required to remove the inflammatory tissues in the root canal, control the infection and eliminate the inflammation, followed by filling treatment. If the affected tooth has resulted in most of the crown being severely damaged and cannot be repaired, complicated by periapical disease, resulting in extensive lesions around the root tip and obvious loosening of the tooth, extraction treatment is required to avoid affecting the surrounding healthy teeth. After extraction, denture treatment or gap retainer treatment can be carried out to avoid the displacement of the surrounding teeth by the empty space of the affected tooth, which may lead to occlusal imbalance and cause other teeth to loosen and shift.