Darkened gaps in teeth need to be remedied depending on the cause, which means targeted treatment. It may be caused by diet, and patients are advised to brush or clean their teeth on time. It may also be caused by caries, periodontitis and other diseases, patients can take medication, surgical treatment and other treatment measures. 1. Diet: If the patient often eats coffee, tea and other foods that contain dark color pigments, and if the teeth are not brushed in time, it will lead to food residues. It is recommended that patients develop the habit of brushing their teeth on time, and if the pigmentation is deep, they can also go to the hospital for ultrasonic scaling under the guidance of the doctor. 2. Caries: For the darkening of tooth gap caused by caries, patients can take surgical treatment, such as resin filling surgery. Teeth gap blackening remedy is to remove the black material in time, and usually pay attention to oral hygiene, you can use dental floss after meals to remove the teeth adjacent to the surface of the soft dirt food debris.