Common clinical cases of dental implant loss are caused by loosening of the upper crown bonding or fracture of the screw inside the dental implant abutment, which needs to be repositioned or fabricated. 1. Loose upper crown bonding. Dental implant loss may be caused by the loosening of the bonding agent between the crown and the restoration, at this time, you need to go to the hospital to clean up the inside of the crown and re-adhesive can be. 2. Broken screws inside the abutment. Dental implant loss may also be due to improper chewing or long-term wear and tear caused by the restoration of the screw inside the abutment broken, this time you need to use ultrasonic instruments, broken screws from the implant internal removal, and then rebuild the abutment and crown for the implant can not be taken out of the fracture of the screws, then need to take out the lower part of the implant, implantation of restoration in an alternative period. Dental implants need to be reviewed regularly, and when they fall off, they need to go to the hospital immediately to check the cause and deal with it in time.