Due to individual differences, there is no optimal way to fill a gap between teeth. Malocclusion, periodontal disease, adjacent surface caries, destruction of the hard tissues of the tooth body and other reasons may cause excessive gaps. Repairing gaps can be done by orthodontics, filling, full crown restoration, cosmetic veneers and other methods according to the different reasons. 1. If the gap is too large due to malformation of the teeth, orthodontic treatment can be used to correct the malformation of the teeth so as to make the gap smaller. 2. If the gap is caused by periodontal disease with age, resulting in gradual loosening and shifting of the teeth, and thus the gap between the teeth increases, it can be controlled by periodontal disease. Periodontal disease can be controlled first to avoid further shifting of teeth, and then consider using other restorative methods to close the gap. 3. If the hard tissues of the teeth are destroyed due to caries on the neighboring surfaces of the adjacent space, resulting in a gap between the missing teeth, resin filling can generally be used to restore the contact between the adjacent spaces of the teeth. 4. If the hard tissue of the tooth is destroyed because the tooth bumps into a hard object, the gap between the teeth becomes bigger, full crowns can be used to repair the hard tissue of the tooth and restore the contact between the neighboring teeth at the same time. 5. If the gap in the anterior region is too large and affects the aesthetic appearance, cosmetic veneers can also be used to restore the appearance of the teeth. The gap is too large to affect the aesthetic, you can go to a professional dentist, under the guidance of a professional doctor to repair the gap, pay attention to improve the teeth during the period must pay attention to do a good job of oral hygiene and care work.