Implant denture is to implant the implant in the alveolar bone of the missing teeth area of the oral cavity, after the implant has become viable, then make the restorations on its upper end to complete the implant denture restoration, the loosening of the implant is different according to different situations, the treatment methods are as follows: 1, loosening of the crown above the implant: the implant and the abutment, the crown through the screws are connected, and the use of a long time will be loosened, which is more common, and can be tightened by the doctor’s help in the follow-up examination; 2, loosening of the whole implant and the root of the teeth: it is more tricky to treat, and needs to be removed, and then re-implantation treatment is carried out if necessary.