This is a situation in which the front teeth experience an excessive vertical overlap. Such a deep bite forces the upper teeth to tip out, causing the formation of spaces between them. Poor angulation of the teeth. In this situation, the result is a small space above the point where the central incisors contact - giving the illusion of a gap. Harmful oral habits.
Lower lip biting can protrude the upper teeth.
In other cases, cysts can form between the upper teeth, preventing normal contact. Abnormal bone structure. Comprehensive orthodontic treatment. A recent article in the British Medical Journal reviews some basic orthodontic problems. Dental treatment requires considerable cooperation from the patient, especially if the patient is a young child.