Carolina Filpo-Perez1, Clovis Monteiro Bramante1, Marcelo Haas Villas-Boas1, Marco Antonio Húngaro Duarte1, Marco Aurélio Versiani2, Ronald Ordinola-Zapata3. 1. Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, University of São Paulo, São Paulo, Brazil. 2. Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. 3. Department of Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, University of São Paulo, São Paulo, Brazil. Electronic address: ronaldordinola@usp.br.
Abstract
INTRODUCTION: The aim of this study was to evaluate the morphologic aspects of the root canal anatomy of the distal root of a mandibular first molar using micro-computed tomographic analysis. METHODS: One-hundred distal roots of mandibular first molars were scanned using a micro-computed tomographic device at an isotropic resolution of 19.6 μm. The percentage frequency distribution of the morphologic configuration of the root canal was performed according to the Vertucci classification system. Two-dimensional parameters (area, perimeter, roundness, aspect ratio, and major and minor diameters) and the cross-sectional shape of the root canal were analyzed in the apical third at every 1-mm interval from the main apical foramen in roots presenting Vertucci types I and II configurations (n = 79). Data were statistically compared using the Kruskal-Wallis and Dunn tests with a significance level set at 5%. RESULTS: Seventy-six percent of the distal roots had a single root canal. Two, three, and four canals were found in 13%, 8%, and 3% of the sample, respectively. In 13 specimens, the configuration of the root canal did not fit into Vertucci's classification. Overall, 2-dimensional parameter values significantly increased at the 3-mm level (P < .05). The prevalence of oval canals was higher at the 1-mm level and decreased at the 5-mm level in which long oval and flattened canals were more prevalent. CONCLUSIONS: The distal roots of the mandibular first molars showed a high prevalence of single root canals. The prevalence of long oval and flattened canals increased in the coronal direction. In 13% of the samples, canal configurations that were not included in Vertucci's configuration system were found.
INTRODUCTION: The aim of this study was to evaluate the morphologic aspects of the root canal anatomy of the distal root of a mandibular first molar using micro-computed tomographic analysis. METHODS: One-hundred distal roots of mandibular first molars were scanned using a micro-computed tomographic device at an isotropic resolution of 19.6 μm. The percentage frequency distribution of the morphologic configuration of the root canal was performed according to the Vertucci classification system. Two-dimensional parameters (area, perimeter, roundness, aspect ratio, and major and minor diameters) and the cross-sectional shape of the root canal were analyzed in the apical third at every 1-mm interval from the main apical foramen in roots presenting Vertucci types I and II configurations (n = 79). Data were statistically compared using the Kruskal-Wallis and Dunn tests with a significance level set at 5%. RESULTS: Seventy-six percent of the distal roots had a single root canal. Two, three, and four canals were found in 13%, 8%, and 3% of the sample, respectively. In 13 specimens, the configuration of the root canal did not fit into Vertucci's classification. Overall, 2-dimensional parameter values significantly increased at the 3-mm level (P < .05). The prevalence of oval canals was higher at the 1-mm level and decreased at the 5-mm level in which long oval and flattened canals were more prevalent. CONCLUSIONS: The distal roots of the mandibular first molars showed a high prevalence of single root canals. The prevalence of long oval and flattened canals increased in the coronal direction. In 13% of the samples, canal configurations that were not included in Vertucci's configuration system were found.
Authors: Thomas Gerhard Wolf; Frank Paqué; Michael Sven Patyna; Brita Willershausen; Benjamín Briseño-Marroquín Journal: Int J Oral Sci Date: 2017-09-08 Impact factor: 6.344
Authors: Sílvio Emanuel Acioly Conrado de Menezes; Shirley Machado Batista; Diego Felipe Brandão de Magalhães; de Albuquerque Diana Santana; Gabriela Queiroz de Melo Monteiro Journal: Iran Endod J Date: 2018