ABSTRACT
OBJECTIVE: To compare changes in WALA ridge and mandibular dental arch dimensions in orthodontic patients treated with a passive self-ligating system and conventional appliances. DESIGN: Original paper. SETTING: Orthodontic department at Inga University Center, Maringá, PR, Brazil. MATERIALS AND METHODS: Pretreatment (T1) and posttreatment (T2) dental casts of 60 patients with Class I malocclusion treated with slight to moderate crowding that were divided into two groups. Group 1: 30 patients treated with a passive self-ligating system, at a mean initial age of 17.68 years and mean treatment time of 2.31 years. Group 2: 30 patients treated with conventional appliances, at a mean initial age of 19.23 years and mean treatment time of 2.56 years. Measurements were taken using a digital caliper directly on pre and posttreatment dental casts to evaluate the transversal dimension behavior of the mandibular dental arch and the WALA ridge width. RESULTS: Self-ligating group presented an increase in WALA ridge width and mandibular transversal dimensions significantly greater than the conventional group, with the exception of intermolar cusp tip distance and intercanine WALA ridge. There was no statistically significant difference between the groups. There was also observed a significantly greater increase of the transversal buccal axis dimensions in the premolar area when compared to the WALA ridge increase in both groups. CONCLUSIONS: Treatment with a passive self-ligating system resulted in a significantly greater increase of the WALA ridge width and mandibular arch dimensions when compared to conventional appliance.
Subject(s)
Dental Arch , Orthodontic Brackets , Brazil , Cephalometry , Humans , Orthodontic Appliance Design , Orthodontic Appliances, FixedABSTRACT
Introdução: a reabsorção radicular, expressa, geralmente, como um arredondamento apical, é um dos achados mais comuns da clínica ortodôntico. Objetivo: avaliar radiograficamente se há similaridade na reabsorção radicular apical encontrada em dentes tratados e não tratados endodonticamente quando submetidos à terapia ortodôntica. Métodos: foram estudados 28 pacientes que apresentavam um incisivo central superior tratado endodonticamente (grupo experimental) e seu homólogo vital (grupo controle) antes do início da movimentação ortodôntica. A mensuração foi realizada comparando-se as radiografias periapicais pré e pós-tratamento ortodôntico. Resultados: não houve diferença estatisticamente significativa (p > 0,05) quanto à reabsorção radicular apical entre os dentes endodonticamente tratados ou não. Conclusão: o tratamento endodôntico não interfere no processo de reabsorção apical decorrente da movimentação ortodôntica.
Subject(s)
Endodontics , Orthodontics , Radiography, Dental , Root ResorptionABSTRACT
The purpose of this study was to evaluate, radiographically, whether there is similarity in the apical root resorption found in endodontically treated teeth and untreated teeth when they are submitted to orthodontic treatment. From 2,500 treatment records examined, 16 patients were selected who had a maxillary central incisor treated endodontically before initiation of the orthodontic movement, and a vital homologous tooth (for control). Measurements were made by comparing the periapical radiographs taken before and after the orthodontic treatment. There was no statistically significant difference (p>0.05) in apical root resorption found in the endodontically treated teeth compared to the group of vital teeth.
