ANATOMIC AND TOPOGRAPHIC RATIONALE FOR DENTAL ARCH CONSTRUCTING AND MEASURING METHODS

Three types of maxillary dental arches were identified: vestibular dental arch, lingual alveolar arch, and dentoalveolar arch. The vestibular dental arch is to be reproduced through connecting the dots at the most prominent part in the vestibular contour of the teeth crowns' occlusal surface, which constitute the dental arch. The alveolar lingual arch was formed through connecting the dots located at the lingual surface of the dental arch in the interdental spaces. The way to shape the dentoalveolar arch implied joining the dots of the lingual alveolar arch at the anterior part (between the distal surfaces of maxillary canines) and the middle of the distal surface of the premolars and molars' occlusal contour. The frontal distal diagonal of the dental arches was found to be the key factor that determines the match between the teeth size and the dental arches.