Ausência de um incisivo inferior – e a coincidência das linhas médias dentárias? Relato de caso

Abstract

Introduction: The main problem caused by the absence of only one lower incisor is the occurrence of tooth volume discrepancy (Bolton) that may present several treatment alternatives. Objective: This article aims to present a case report with congenital absence of a lower incisor of a patient undergoing orthodontic treatment with excellent occlusal, functional, and aesthetic results. As well as to discuss the problem of anterior tooth volume discrepancy (Bolton) and attainment or not of coincident median lines. Treatment performed: Complete orthodontic treatment with fixed appliances (Edgewise Standard, 0.022x0.028”) in both arches. Use of Class II oriented elastics on the right side to move the lower right canine to the position of the lateral tooth, and so on successively with the other teeth of this lower hemiarch, and to obtain coincident dental midlines. Result: Excellent result with great intercuspation and “apparent” coincidence of the dental midline with Angle’s Class III molar relationship in the right side, and stable result in several years of follow-up. Conclusions: Moving of the entire lower hemiarch of one side to mesial with coincidence of midlines with stable occlusal contacts and functional occlusion can be a good alternative.