Guilherme Moreira de Carvalho1, Emílio Carlos Sponchiado Junior1, Angela Delfina Bittencourt Garrido1, Raphael Carlos Comelli Lia2, Lucas da Fonseca Roberti Garcia3, André Augusto Franco Marques4. 1. Department of Endodontics, School of Dentistry, Federal University of Amazonas, Manaus, Amazonas, Brazil. 2. Department of Physiology and Pathology, Araraquara School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil. 3. Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University, Araçatuba, São Paulo, Brazil. Electronic address: drlucas.garcia@gmail.com. 4. Department of Endodontics, School of Dentistry, State University of Amazonas, Manaus, Amazonas, Brazil.
Abstract
INTRODUCTION: The aim of this study was to evaluate the apical transportation, the centering ability, and the cleaning effectiveness of a reciprocating single-file system associated to different glide path techniques. METHODS: The mesial root canals of 52 mandibular molars were randomly distributed into 4 groups (n = 13) according to the different glide path techniques used before biomechanical preparation with Reciproc System (RS): KF/RS (sizes 10 and 15 K-files), NGP/RS (no glide path, only reciprocating system), PF/RS (sizes 13, 16, and 19 PathFile instruments), and NP (no preparation). Cone-beam computed tomography analysis was performed before and after instrumentation for apical third images acquisition. Apical transportation and its direction were evaluated by using the formula D = (X1 - X2) - (Y1 - Y2), and the centering ability was analyzed by the formula CC = (X1 - X2/Y1 - Y2 or Y1 - Y2/X1 - X2). The samples were submitted to histologic processing and analyzed under a digital microscope for debris quantification. The values were statistically analyzed (Kruskal-Wallis, the Dunn multiple comparisons test, P < .05). RESULTS: All groups had similar apical transportation values, with no significant difference among them (P > .05). Groups had a tendency toward transportation in the mesial direction. No technique had perfect centering ability (=1.0), with no significant difference among them. KF/RS had larger amount of debris, with statistically significant difference in comparison with NGP/RS (P > .05). CONCLUSIONS: The different glide path techniques promoted minimal apical transportation, and the reciprocating single-file system tested remained relatively centralized within the root canal. Also, the different techniques interfered in the cleaning effectiveness of the reciprocating system.
INTRODUCTION: The aim of this study was to evaluate the apical transportation, the centering ability, and the cleaning effectiveness of a reciprocating single-file system associated to different glide path techniques. METHODS: The mesial root canals of 52 mandibular molars were randomly distributed into 4 groups (n = 13) according to the different glide path techniques used before biomechanical preparation with Reciproc System (RS): KF/RS (sizes 10 and 15 K-files), NGP/RS (no glide path, only reciprocating system), PF/RS (sizes 13, 16, and 19 PathFile instruments), and NP (no preparation). Cone-beam computed tomography analysis was performed before and after instrumentation for apical third images acquisition. Apical transportation and its direction were evaluated by using the formula D = (X1 - X2) - (Y1 - Y2), and the centering ability was analyzed by the formula CC = (X1 - X2/Y1 - Y2 or Y1 - Y2/X1 - X2). The samples were submitted to histologic processing and analyzed under a digital microscope for debris quantification. The values were statistically analyzed (Kruskal-Wallis, the Dunn multiple comparisons test, P < .05). RESULTS: All groups had similar apical transportation values, with no significant difference among them (P > .05). Groups had a tendency toward transportation in the mesial direction. No technique had perfect centering ability (=1.0), with no significant difference among them. KF/RS had larger amount of debris, with statistically significant difference in comparison with NGP/RS (P > .05). CONCLUSIONS: The different glide path techniques promoted minimal apical transportation, and the reciprocating single-file system tested remained relatively centralized within the root canal. Also, the different techniques interfered in the cleaning effectiveness of the reciprocating system.
Authors: Iussif Mamede-Neto; Alvaro Henrique Borges; Orlando Aguirre Guedes; Durvalino de Oliveira; Fábio Luis Miranda Pedro; Carlos Estrela Journal: Open Dent J Date: 2017-02-14
Authors: Iussif Mamede-Neto; Álvaro Henrique Borges; Ana Helena Gonçalves Alencar; Marco Antonio Hungaro Duarte; Manoel Damião Sousa Neto; Carlos Estrela Journal: Open Dent J Date: 2018-01-29
Authors: Etienny da Silva Arruda; Emílio Carlos Sponchiado-Júnior; Mariana Travi Pandolfo; Márcio Acris de Carvalho Fredson; Lucas da Fonseca Roberi Garcia; André Augusto Franco Marques Journal: Eur J Dent Date: 2019-12-31