In the process of using dental implants, they can become loose, as follows: 1) the crown is loose and the adhesive between the crown and the abutment is disintegrating. If there is no problem with the screw, it can be directly tightened again; 3, the loosening of the implant is more serious, and there are more reasons for the loosening of the implant, such as excessive occlusal force, peri-implantitis, etc., which can lead to the loss of the bond between the implant and the bone and produce loosening, which may require taking down all the implants and treating the wound and then re-implanting at a later date.