The absence of a tooth can be restored with either a dental implant or a full removable denture, depending on the condition of the patient’s alveolar bone. The details are as follows: 1. Dental implant restoration: Dental implant is the best solution for restoring missing teeth, which is to choose the artificial tooth root with better compatibility with human tissues to be planted in the alveolar bone, observe for 2~3 months, and if the artificial tooth root does not have rejection reaction with the organism, then it will be a successful implantation. Then the abutment will be installed on the artificial tooth root, and then the porcelain tooth will be restored at a later stage to restore the chewing function of the tooth. However, dental implants have high requirements on the alveolar bone, which needs to be full of alveolar bone and the width and thickness of the alveolar bone are in line with the conditions of dental implants, and then the cost of dental implants is relatively high, and the time is also long. 2. Full mouth activity denture repair: relatively wide range of indications, need to be taken off every day, the base tray is easy to produce food congestion between the gums, causing redness, swelling and pain of the gums. But the cost is low, the use of time is also relatively short. Teeth without teeth is best to the hospital stomatology examination in a timely manner, after the doctor’s examination, and then determine the best treatment plan.