A gap in the middle of the incisors with black spots may be food debris or due to caries. 1. Usually patients have gaps in the middle of their incisors, which may be caused by tooth alignment disorders, gum dysplasia and other conditions. A black spot in the middle gap of the incisors may be the food residue left after eating. And caries patients can also appear in the middle of the incisors have a gap with black spots, and in the external hot and cold stimulation, can also feel the pain, but can be lifted after the stimulation disappears. 2. When patients find black spots in the middle of the incisors, they should develop good habits, brush their teeth diligently to ensure oral cleanliness. And also need to rationalize the diet, control sugar intake, and regular oral examination. If there is caries, you need to use fluoride, silver ammonium fluoride and other treatments under the guidance of the doctor, and if necessary, you also need to carry out inlay restoration surgery, filling surgery and so on. Patients are advised to pay more attention to oral hygiene when they find black spots in the middle of their incisors, and to seek timely medical treatment if they persist.