Gaps in the incisors may be caused by dental dysplasia, trauma, dental caries, periodontitis and so on. 1. Dental dysplasia: improper breathing or swallowing dysfunction in young children may cause dental or jawbone dysplasia, resulting in gaps in the incisors. 2. Trauma: when the daily exercise, life is not careful, fall or touch a hard object may make the teeth are damaged, resulting in incisors have gaps in the situation. 3. Dental caries: It is a disease that occurs when the hard tissues of the dentition are chronically and progressively destroyed under the influence of many factors, mainly bacteria. If the tooth tissue damage caused by dental caries, the contact between two adjacent teeth is destroyed, and the tooth body is defective, which will make the incisors have gaps. If the middle of the incisors often food debris and soft dirt retention caused by neighboring surface caries, will also make the incisors gap. 4. Periodontitis: chronic inflammation of periodontal support tissues caused by localized plaque. Long-term inflammation will stimulate the tissues and nerves within the teeth, causing the gums to shrink and loosen, the roots of the teeth to be exposed, and the teeth to elongate, resulting in a gap in the incisors. Pay attention to oral hygiene and have regular oral checkups. When there is a gap between the incisors, you should go to the hospital stomatology department in time, after clarifying the cause of the disease and active treatment.