The invention relates to a method of designing a dental apparatus of a facial plate comprising crowns of teeth and the roots corresponding thereto, said method comprising the following steps: - constitution by medical imaging of a volume image of the solid mass in the form of an initial digital file - modification of said volume image by computer processing of said initial digital file, and obtaining a modified digital file, said modification comprising at least one tooth movement for a desired correction of teething - design of said dental appliance using said initial digital file and said modified digital file, and production of a file that can be used by numerically controlled machines capable of manufacturing a dental appliance. in the step of modifying the volume image, for each tooth object of a displacement, its crown is individualized and it is associated with it the root corresponding to it, in that said volume image of the headband comprises the image of the mandibular articulation and the recording of movements of the mandible during a plurality of movements of said mandible, so as to account for possible movements of said joint after capturing the movement of the same mandible. The invention also relates to a method for recording the mandibular displacements, characterized in that it comprises a step of placing active diodes (combressed points in the attached figure) on the facial solid mass on the one hand, on the mandibular arch on the other hand, and in that the recording of the mandibular displacements is performed by an optoelectronic camera with active diode recognition.L'invention a trait à un procédé de conception d'un appareil dentaire d'un massif facial comprenant des couronnes de dents et les racines leur correspondant, ledit procédé comprenant les étapes suivantes : - constitution par imagerie médicale d'une image volumique du massif facial sous la forme d'un fichier numérique initial - modification de ladite image volumique par traitement
