Generally speaking, this kind of small teeth is the main cause of tooth cracking. Behavior and gingival atrophy, the treatment is not exactly the same, the shape is conical, you can use crown to repair the normal shape of teeth or this closed gap. Most of the crevices caused by gingival atrophy are located in the neck of the teeth, which is the legendary black triangle. The most common cause is periodontal disease. Patients should actively treat the primary disease. At the same time of treatment, the tooth washing device or the gap between teeth can clean the teeth or the insertion area, which can maintain oral hygiene. In addition, in the development stage of children's deciduous teeth, due to the development of jaws, there will be some periods when the gap between teeth is large, which is a normal physiological manifestation. Most of the teeth disappeared after tooth replacement. Some doctors know the reason clearly and choose the appropriate method for treatment. Not all teeth can be solved by this restoration.