The treatment of protruding upper teeth varies depending on the causes and severity. In mild to moderate cases, they will benefit from early treatment to modify the teeth and jaw positions during growth spurt (i.e. growth modification). This may involve wearing head gear, functional appliances, fixed Class II correctors, Herbst appliance etc. Hence, it is best that your child be assessed and diagnosed early by an orthodontist. On the other hand, if it is a severe case involving a severely retrusive lower jaw, then it may be best to defer treatment until after maturity to have a combination of orthodontics and jaw surgery.