Tratamento com Invisalign® da má oclusão de classe III subdivisão, utilizando dispositivo de ancoragem esquelética temporária.

Abstract

The aim of this study was to report a case of corrective treatment of Class III subdivision malocclusion and crossbite using Invisalign® System aligners with a total treatment time of 2 years and 9 months. A 24-year-old female patient had a straight facial profile with good expression and lip support, a Class III molar relationship on the left side and absence of the right lower first molar, with consequent lower midline deviation. In addition to a crossbite of the anterior teeth in the region of the lateral incisors and second premolars, right side. After an initial phase of 84 pairs of aligners and skeletal mini-implant anchorage, the patient used a series of 20 additional aligners for completion. The changeover period was every 7 days. Throughout the treatment, the prescription of aligners proved to be efficient in minimizing the side effects of both orthodontic mechanics and Class III elastics. At the end of treatment, the patient exhibited malocclusion correction without marked lower incisor inclination, as commonly evidenced by other appliance prescriptions reported in the current literature. Considering the inherent characteristics of the clinical case presented here, the aligners technique constituted a corrective treatment option for Class III dental, aiming at stability and better aesthetic results for the smile and the face.