Most of the missing teeth are caused by dental caries, in addition to trauma or dysplasia can also be caused. There are several ways to repair missing teeth: 1, orthodontics: close the gap of missing teeth through orthodontics; 2, movable teeth: free to take and wear, need to be removed after meals or sleep, cleaning, and then soak it in water; 3, porcelain bridge: grind the teeth next to the missing teeth small, with these two teeth as the abutment, and then fix the three teeth together; 4, dental implants: that is, replace the natural tooth root with an artificial tooth root, and then install a denture The patient’s teeth will be kept intact.