RESUMO
Paciente com má-oclusão de Classe II de Angle, mordida cruzada posterior, sobremordida profunda, apinhamento dentário e impacção de canino. O tratamento foi realizado pelas técnicas do arco segmentado e do arco reto simultaneamente. O propósito deste trabalho foi apresentar as diferentes mecânicas de ambas as técnicas.
The following case report is an orthodontic treatment of class II malocclusion, posterior cross bite, severe overbite, crowding and impacted maxillary canine. The treatment was performed by Segmented Arch and Straight wire technique simultaneously. The aim of this paper is to show the different approaches in both techniques.
Assuntos
Humanos , Masculino , Adolescente , Má Oclusão Classe II de Angle , Ortodontia Corretiva , Fenômenos Biomecânicos , Aparelhos OrtodônticosRESUMO
The purpose of this study was to describe condylar growth and mandibular remodelling changes associated with bionator therapy. Twenty-five patients (15 males and 10 females) between 6.9 and 11.2 years of age with Class II division 1 malocclusions were randomly allocated to either control (n = 11) or treatment (n = 14; bionator only) groups and followed longitudinally for approximately 1 year. Treatment consisted of a bionator only, constructed to clear the buccal dentition by 2 mm and to position the mandible into an edge-to-edge incisor relationship. Using metallic implants for superimposition, mandibular growth, displacement, and true rotation were evaluated cephalometrically. The results showed significant changes in the direction (more posterior) but not in the overall amount of condylar growth. The bionator appliance produced greater than expected posterior drift of landmarks in the condylar and gonial regions. Cranial base superimposition showed greater than expected anterior mandibular displacement, but little or no true mandibular forward rotation with bionator therapy. The bionator appliance alone produced changes in condylar growth direction and remodelling changes associated with mandibular rotation and displacement.