Tooth displacement is divided into the following cases: 1, there are missing teeth in the mouth, the teeth are not timely restoration, missing teeth for a long time, missing teeth on both sides of the neighboring teeth will be tilted to the gap of the missing teeth, the jaw teeth will be elongated, so that the whole occlusal relationship is disorganized. Therefore, if there is a missing tooth in the mouth to timely set teeth, if necessary, to the neighboring teeth and jaw teeth for certain grinding to set teeth. 2, is caused by periodontal disease, periodontal disease in the late stage of the phenomenon will appear in the teeth fan-shaped displacement, many patients will feel that the teeth in the mouth is getting longer and longer, more and more outward. For this type of tooth shifting to do systematic periodontal treatment, control the inflammation of the periodontium, to ensure that the teeth are not further shifted. Treatment methods mainly include ultrasonic gingival cleaning, periodontal scaling and a series of treatments, when the periodontal inflammation control, the phenomenon of teeth shifting will be alleviated. 3, due to congenital malocclusion of teeth caused by shifting teeth, this situation for young patients is recommended to use orthodontic methods to align the teeth.