[Treatment is not diagnostic. Therapeutic common sense regarding class III dysmorphia].

Class III dysmorphia, classically distributed in hereditary or functional etiology, have often multifactorial causes. Breaking the dysmorpho-dysfunctional cascade with early treatment may seem to be an essential alternative to give growth a new orientation. Whether the treatments are preventive, interceptive with or without an appliance, orthodontic or surgical (early, first-line or late), this takes more account of the clinical form than of age. The authors, through clinical cases, will develop their therapeutic approach, based on clinical common sense. Waiting to act at the right time is essential to set up treatments based on proven therapies.