In the past, orthodontic treatment was not started in young patients until the ages of twelve to fourteen, after all of their permanent teeth had erupted. Because growth and development were nearly complete by then, it was often necessary to remove up to four permanent teeth to correct the bite and/or profile. Cooperation in wearing headgear and elastics was frequently lacking in some teens.
Interceptive orthodontics is a more recent concept where certain problems are addressed and treated early, around ages seven to eleven, to take advantage of the growth process and better compliance. This can result in fewer teeth extracted, better profile and facial esthetics, and great, full smiles!