If we decide in advance that our patients will not wear headgears, then of course they will not. I still say that we have an obligation to our patients, their parents, and our profession to convince our patients and parents of the importance of extra oral anchorage. In some cases there is no substitute for an upward force on the maxillary incisors. If this force can be provided, with impunity, by intra oral forces, all well and good. If not, then only extra oral forces will produce an ideal result.
Many orthodontists allow the anterior end of the palatal plane and the incisors to move downward.
This is wrong, and extra oral force will prevent this undesirable tooth movement. For many years we have been urgently advising colleagues to avoid the intrusion of lower incisors, for the reason that they have a strong tendency, in growing patients, to erupt posttreatment resulting in bite closure and crowding of lower incisors. We read numerous articles pertaining to stable treatment results, but the intrusion of lower incisors is never mentioned. If we ever hope to consistently produce stable treatment results we must realize that the lower incisor plays an important role. We have shown many treated cases where 10 and 11 Mmm. of overbite has been reduced to about 1 Mmm. without intruding lower incisors.