Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study

Autor: Bruno Cavalini Cavenago, Juliane Maria Guerreiro-Tanomaru, Camila Galletti Espir, Mário Tanomaru-Filho, Marco Antonio Hungaro Duarte, Camila Almeida Nascimento-Mendes
Přispěvatelé: Universidade Estadual Paulista (Unesp), Federal University of Paraná, Universidade de São Paulo (USP)
Rok vydání: 2018
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
ISSN: 1436-3771
1432-6981
Popis: Made available in DSpace on 2018-12-11T17:18:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-03-10 Objectives: To evaluate the shaping ability and cleaning after oval root canal preparation using one or more instruments in reciprocating or rotary motion. Materials and methods: Oval-shaped mandibular incisors were selected, based on the radiographic diameter (2 ≤ diameter ratio ≤ 4), and assigned according to root canal preparation (n = 18): single-file (Reciproc R40); two reciprocating files (Unicone size 20 and 40, .06 taper) or Mtwo rotary files until a size 40, .06 taper instrument. Root canal preparations were performed using an open root canal model. Scanning was performed before and after preparation using SkyScan 1176 with a voxel size of 17.42 μm. Volume, percentage of debris, and percentage of uninstrumented surface were analyzed in the entire root canal and in each root canal third. Data were compared using ANOVA and Tukey or Kruskal-Wallis and Dunn tests (α = 5%). Results: The initial volume were similar among the groups (p > .05). Unicone preparation was associated with higher debris, increase in root canal volume and uninstrumented surface in entire root canal and in the middle third (P < .05). Mtwo was associated with lower uninstrumented surface in the entire root canal and in the cervical third. The apical third were similar for the three preparations. Conclusions: Unicone system using two instruments in reciprocating motion resulted in higher increase in volume. However, less remaining debris was observed when Reciproc single-file and Mtwo rotary systems were used. Clinical relevance: A preparation that volumetrically increases the root canal is not necessarily associated with better cleaning. Shaping and hard-tissue debris removal depends on root canal anatomy, kinematics, number of instruments, and instrument design. Department of Restorative Dentistry Araraquara Dental School UNESP – Univ Estadual Paulista Department of Restorative Dentistry Federal University of Paraná, Curitiba Department of Restorative Dentistry Endodontics and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru Department of Restorative Dentistry Araraquara Dental School UNESP – Univ Estadual Paulista
Databáze: OpenAIRE
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