About Orthodontics | For All Ages | Common Orthodontic Issues | Types of Braces | Ortho Appliances | i-CAT® FLX 3D Imaging | iTero® Digital Impression System Common Orthodontic Issues Crowding of the teeth Open bite - Front teeth don't touch Deep overbite - Lower front teeth bite into palate Missing lateral incisors Underbite - Lower front teeth in front of upper teeth Overjet - Protruding front teeth Phase One - Early treatment completed before all permanent teeth have erupted