In principle, all missing teeth, aged 18 to 80 years old, can be implanted. The most critical condition is whether the bone volume in the missing tooth area can accommodate the implant. Of course, the physical condition should be able to withstand a surgery like tooth extraction, and it is better not to have heart disease, uncontrolled hypertensive disease, diabetes, etc., in order to avoid bleeding or non-healing wounds during the surgery. It is best not to smoke or to smoke no more than 10 cigarettes a day to avoid affecting the bonding of the implant to the bone. The advantages of implant dentures are obvious. For those who are missing a single tooth, fixed dentures can be made without grinding down the adjacent good teeth and without damaging the neighboring teeth. For those who have many missing teeth and cannot use conventional methods to set fixed dentures, fixed dentures can be made using implants. For those who are missing teeth and have severe atrophy of the dental bed and cannot wear a full denture, 2~4 implants can be placed to make a stable denture, while 6~8 implants can be placed to make a fixed denture, which feels like a real dream of a “third set of teeth” for human beings. At present, implant restoration technology is mature, easy to use, safe, and has a high success rate, which is a blessing for patients with missing teeth to relieve their chewing function and aesthetic problems.