Doctor Kuo-Ting Sun specializes in pediatric dentistry, Juvenile Orthodontics and dentistry for mentally and physically impaired. The American Association of Orthodontists suggest children to undergo initial professional Orthodontist specialist evaluation at the age of 6 and to undergo frequent check-ups. The specialist shall provide expert evaluation and treatment suggestions. Adjustments may include: 1) The gap between incisors is too large; 2) open bite; 3) anterior bite; 4) Premature loss or defect of milk tooth; 5) Severe open bite, anterior bite and mandibular prognathism; 6) Lateral Deviated Mandible etc.