[Occlusal interference of lingual appliances: advantages or inconvenience]

Lingual orthodontics presents a few technical problems; when practicing it, it reveals a considerable amount of advantages. The occlusal interference of the lingual maxillary bite plane with the mandibular incisors generate contact forces. A moment of corono-vestibulary version will weight upon the upper incisor independently from teeth position. Actions regarding the mandibulary incisors are depending on their position according to the bite plane. An incisor axe in perpendicular position to the plan generates intrusion. A lingual position generates a moment of lingual version and vice versa. These actions have to be considered. They might be, according to clinical situation, beneficial or not.