Braces and Invisalign make it possible to move teeth into a desirable location. Usually the teeth are either crooked or rotated, the overbite might be too severe, the teeth might be too flared (the reference to "buck teeth") or there might be too much spacing. All of these and many more result in a very collapsed and restricted smile. Sometimes the correct answer to a deficient smile is orthodontics and braces, not veneers and bondings.