This study evaluated the degree of buccolingual inclination of mandibular tooth crowns relative to torque. For such purpose, mandibular and maxillary stone casts from 31 Caucasian Brazilian adults with normal occlusion, pleasant facial aspect and no history of previous orthodontic treatment were examined. A custom device was developed for measuring the degree of inclination (torque) of bracket slots of orthodontic appliances relative to the occlusion plane, at three bonding height: standard (center of clinical crown), occlusal (0.5 mm occlusally from standard) and cervical (0.5 mm cervically from standard). Except for the mandibular incisors, which presented a small difference in torque from one another (lingual root torque for central incisors and buccal root torque for lateral incisors), the remaining average values are close to those found in the literature. Due to the convexity of the buccal surface, the 1-mm vertical shift of the brackets from occlusal to cervical affected the values corresponding to the normal torque, in approximately 2 degrees in central and lateral incisors, 3 degrees in canines and 8 degrees in premolars and molars.
Introduction: Skeletal posterior crossbite (SPCB) has a multifactorial etiology, as it may be caused by parafunctional habits, atypical position of the tongue, tooth losses and maxillary or mandibular transverse skeletal asymmetries. Skeletal involvement may lead to facial changes and an unfavorable aesthetic appearance. The treatment of SPCB diagnosed in an adult patient should be correctly approached after the identification of its etiologic factor. Surgically-assisted rapid maxillary expansion (SARME), one of the techniques used to correct SPCB in skeletally mature individuals, is an efficient and stable procedure for the correction of transverse discrepancies that may be performed in the office or in a hospital. Objective: This study discusses the results of asymmetrical SARME used to correct unilateral SPCB associated with transverse mandibular asymmetry. Conclusion: The treatment alternative used in the reported case was quite effective. At the end of the treatment, the patient presented adequate occlusion and facial aesthetics.
OBJETIVO: O objetivo do presente estudo foi relatar o sucesso do tratamento de uma má oclusão esquelética de Classe III, com ênfase na biomecânica utilizando técnicas ortodônticas tradicionais. CASO CLÍNICO: A paciente apresentava perfil côncavo, sobressaliência negativa, desvio funcional da mandíbula, sorriso invertido e apinhamento anterossuperior, com protrusão do lábio inferior, com ângulo ANB de -3° e Wits de -4 mm, que comprovavam a má oclusão esquelética de Classe III. As opções de tratamento foram tratamento ortodôntico-cirúrgico, camuflagem ortodôntica com extrações de pré-molares ou camuflagem ortodôntica sem extrações. Como não havia queixa da estética facial, optou-se pela terceira opção. Braquetes Edgewise foram utilizados, com torque vestibular de coroa nos incisivos superiores e torque resistente nos incisivos inferiores. Elásticos intermaxilares assimétricos de Classe III foram também utilizados para corrigir a relação molar, potencializar as inclinações dentárias e promover a rotação da mandíbula no sentido horário. RESULTADOS: Ao fim do tratamento, foi obtida correta oclusão, estética facial e sorriso agradável. CONCLUSÕES: A correção da má oclusão esquelética de Classe III com mecânica convencional mostrou-se viável, levando em consideração o padrão de crescimento da paciente, aspecto facial, domínio da biomecânica e comprometimento da paciente com o tratamento.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.