The back three big teeth are lost can take the installation of movable denture, dental implants and other ways to set teeth. 1. Installation of movable denture: if the back three big teeth are missing need to use the alveolar bone, tooth bracket covered by the mucosa as support, and then use the denture retainer and abutment and other devices, repair the missing teeth and the surrounding neighboring tissues. And the commonly used active denture materials include porcelain teeth, metal-faced teeth, metal teeth, plastic teeth and so on. 2. Dental implants: the back three big teeth are lost can also be surgically implanted with pure peptide metal with high compatibility with human bone into the defective parts of the teeth, which can have the effect of dental function and maintain the aesthetic effect of the teeth. It is recommended that the back three teeth are lost need to consult a doctor in a timely manner, the doctor will be based on the severity of the damage to the teeth to choose the appropriate dental veneer. In addition, usually to maintain local cleanliness, after each meal belongs to the timely rinse mouth, every day need to develop the habit of morning and evening brushing, diet needs to eat less nuts, ribs and other hard food.