An experimental analysis of the forces exerted by perioral muscles on the dental arches

摘要

AbstractDuring the various oral functions, as is known, perioral muscles interact with dental tissues, gingivae and alveolar bone. Since the forces they exert during this interaction may affect teeth position, it appears very important in orthodontics to acquire means for monitoring and measuring them. Nevertheless, from an analysis of literature on this specific subject a lack of knowledge concerning the amount of load exerted by perioral muscles emerges, so that its contribution so far to teeth displacement is unknown. The aim of the present work is the “in vivo” evaluation of the actual forces applied by perioral muscles on dental arches by an automatic measurement chain carried out by means of two miniaturised load cells (full scale=9.81 N) placedon the upper incisors. Preliminary results permitted an estimation of the maximum value of the applied force range for various phonema, which proved to be in every case lower than about 1.9