For the time to fill a tooth, it depends on the size and location of the cavity, as well as the patient’s needs to judge, but generally filling a tooth is about 20-40 minutes. Nowadays, the materials used for filling are resin-based materials, which can meet the patient’s requirements in terms of aesthetics and hardness, and the treatment process is problem-free, and the patient will not open his mouth for too long and cause discomfort, and the final recovery effect is also relatively good. If the defect is relatively large, may not only need to fill, but also need to carry out indirect repair, such as doing inlays, crowns or for aesthetic purposes to do some veneer repair, the number of times this is more, may need 2-4 times, each time according to the number of pieces of the treatment to determine the time, generally a piece of 40 minutes or less.