An overbite is when the top teeth bite over and completely hide the lower teeth.This is not to be confused with an overjet, where the top teeth protrude well beyond the bottom teeth.Sometimes both happen together.Clear braces have the same application and action as more traditional metal braces, so yes clear braces can fix an overbite though usually in conjunction with a removable orthodontic functional appliance to open the bite.In some adults we can avoid the need for a removable appliance initially by placing little build ups on the back of the front upper teeth. Your dentist or orthodontist can explain all this on your free consultation.