Efeito da instrumentação contínua e reciprocante sobre o volume do canal radicular e propagação de micro trincas dentinárias

• Ano de defesa: 2019
• Autor(a) principal: Nascimento, Bianca Mara Zakalusne do
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Positivo; Brasil; Pós-Graduação; Programa de Pós-Graduação em Odontologia Clínica; UP
• Palavras-chave em Português: Odontologia; Endodontia; Canal radicular - Tratamento; Tomografia computadorizada por raios x; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2117

Vertical root fracture (VRF) is a complication that can affect endodontically treated and untreated tooth, occurring from the propagation of dentin microcracks caused by manipulation of the root canal, which may lead to tooth loss. The objective of this study was to evaluate the propagation of dentin microcracks and to calculate the root canal volume increase after being prepared with two endodontic instruments; Protaper Next (PTN) and WaveOne gold (WOG) (Dentsply, Maillefer, Ballaigues, Switzerland) by computerized micro-tomography (micro-CT) analysis. We selected 48 upper molars distributed in two groups randomly, Group 1 PTN and Group 2 WOG. The samples were scanned before and after instrumentation, and then the image analysis was performed to detect the propagation of existing dentin microcracks and calculate the pre and post instrumentation volume. Dentin microcracks were observed in 95.8% of the samples, both PTN and WOG instruments propagated micro cracks after instrumentation, but there was no significant difference between the instruments. In relation to the root canal volume there was no statistic difference between PTN and WOG.