[Failures and tongue rehabilitation].

When confronted with difficult-to-eradicate dysfunctions and parafunctions, speech therapy most often proves a reliable ally to control the functional environment of the dental arches. However, a number of factors ranging from psychological issues to anatomical ENT obstructions, from genetic anomalies to iatrogenic procedures, account for the occasional mixed results achieved using this approach. In addition, our own treatment results can also be jeopardized or even obliterated by a recalcitrant tongue or one which has been inadequately provided for. The author will analyze the different factors involved through a series of clinical cases in order to outline her thinking regarding this organ, which can be either a driving force behind our treatments or a force for destruction.