[The occlusal plane: an architectural myth or a proprioceptive myth?].

From two radiographic pictures of the head in profile, in meantime of few years, with the same person, the author proves that occlusal plane doesn't vary during growth in comparison with the pterygo-clivien compass (Stable zone leasing against pterygoïd process and superior clivus). The orientation of occlusal plane crossing by contact of the first molars and the middle of incisive intersection has an approximately analogous value. This value is equal to 110 degrees for the sample population, whatever the person's morphology and the lapsed time is. The occlusal plane moves parallel to himself and gets lower on a sagittal téléradiographic picture.