After tooth loss, there are the following types of restorations: 1, movable denture restoration: movable denture patients can take and wear it by themselves, the advantage is that it is simpler and cheaper. It is easier and cheaper to wear. If the individual teeth are missing, it is necessary to make a movable bridge, which also has risks, and it is difficult for some people such as Alzheimer’s to take it, or stroke patients to take it, which can also lead to more serious cases such as bleeding caused by stabbing the aorta; 2, fixed denture restoration: grind the next two teeth as piers, and glue the fixed denture to the two piers. But the local may also have inflammation, or cause the pulp to be stimulated, resulting in fistula and other problems, and the adhesive will loosen and dissolve after several years, and the abutment teeth will also be secondary to caries, etc., now less and less to do; 3, implant restoration: if the bone condition is good and the patient’s economic condition is good, it is generally recommended to implant restoration. Because it does not damage the neighboring teeth, and the comfort is better.