Best dentist in Adambakkam | Midline Diastema: What It Is and How to Correct It A midline diastema refers to a gap between the two upper front teeth, often caused by genetics, habits like thumb-sucking, or an oversized labial frenum. Correction options include orthodontic treatments like braces or clear aligners, dental bonding, or veneers, depending on the severity. Addressing this gap not only enhances your smile but also improves oral health. At Dr. Akkshaya Dental & Aesthetics, we provide personalized solutions to close gaps and perfect your smile.