Sometimes, the lower jaw will grow faster than the upper so that the lower teeth are in front. This is called Class 111 Malocclusion. While this can, on some occasions be corrected by Orthodontics, these cases are very likely to relapse, in which case, jaw surgery to move the upper jaw forward or the lower jaw back will almost certainly be recommended when he is eighteen.
Fortunately, Orthotropics has a good success record of curing these patients permanently by encouraging their upper jaw to grow forward and by teaching them to keep their mouths closed.
Be aware that this is a serious condition and much more easily cured at the age of five or six than when the patient is older.