Elderly people who have lost all their teeth can be fitted with dentures or full dental implants. 1. Installation of full mouth activity denture: the old man lost teeth seriously affect the old man chewing food, can be installed in the hospital suitable full denture, so that the old man to restore the chewing function, full denture composition is mainly resin, the advantage is affordable, the disadvantage is that the installation of full denture early in the old man will often have a strong sense of foreign body, it takes a longer period of time to get used to. 2. Full mouth dental implant surgery: the elderly can choose to do full mouth dental implants after tooth loss, dental implants are closer to the person’s own teeth than dentures, there will be no obvious foreign body sensation, more comfortable than dentures. However, dental implants are not suitable for elderly patients with severe hypertension, diabetes, osteoporosis, the scope of application is more limited, and the price of dental implants is more expensive than dentures. Elderly people who have lost their teeth should go to the hospital in time and choose the appropriate treatment under the guidance and advice of the doctor.