Dental implants are dentures. Dental implants are implanted in the alveolar bone under local anesthesia, and after 3-6 months the implant will grow together with the bone, mimicking the natural tooth roots, and then the abutment will be attached to make a denture crown above. Dental implants have absolute advantages over traditional fixed bridges and partial removable denture restorations. First of all, dental implants are independent fixed restorations that do not have to be repeatedly removed every day like partial removable denture, and they do not have a large amount of food ingrowth. Secondly, the implant is an independent restoration of the missing tooth area, which is retained by the implant in the alveolar bone and does not require the removal of the healthy teeth on both sides for bridge restoration as in the case of fixed bridges. For the free end of the missing fixed bridge can not be restored, but the dental implant can, so if the amount of bone in the missing tooth area allows, it is recommended to prefer implant restoration.