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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of larger apical size on the quality of preparation in curved canals using reciprocating instruments with different heat thermal treatments

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Author(s):
Duque, J. A. [1] ; Vivan, R. R. [1] ; Duarte, M. A. H. [1] ; Alcalde, M. P. [1] ; Cruz, V. M. [1] ; Borges, M. M. B. [1] ; Bramante, C. M. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Sch Dent Bauru, Dept Dent Endodont & Dent Mat, Bauru, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: International Endodontic Journal; v. 52, n. 11, p. 1652-1659, NOV 2019.
Web of Science Citations: 0
Abstract

Aim To evaluate the influence of larger apical canal enlargement in curved canals using reciprocating systems subjected to various heat treatments. Methodology Ninety mandibular premolars with root curvatures ranging from 20 degrees to 30 degrees were selected and scanned by microcomputed tomography (micro-CT) before and after root canal preparation with reciprocating systems (n = 30): Reciproc Blue (RB size 25, .08 taper and size 40, .06 taper; VDW, Munich, Germany), WaveOne Gold (WOG size 25, .07 taper and size 35, .06 taper; Dentsply Sirona, Ballaigues, Switzerland) and ProDesign R (PDR size 25, .06 taper and size 35, .05 taper; Easy Dental Equipment, Belo Horizonte, Brazil). Canal transportation, untouched areas, and apical and total root canal volumes were measured. Statistical analysis was performed with the nonparametric Kruskal-Wallis and Dunn's tests and a significance level set at 5%. Results The between-group comparison revealed no significant difference in untouched areas, canal transportation, and apical root canal volume among the groups (P > 0.05). However, WOG size 35, .06 taper was associated with a significant increase in the percentage of total canal volume in comparison to the PDR size 35, .05 taper (P < 0.05). The within-group comparison revealed a significant decrease in untouched areas, increase in apical and total root canal volume for all groups when using a larger instrument (P < 0.05). There was no significant difference in transportation among the groups and when a larger apical preparation was created (P > 0.05). Conclusions Larger apical enlargement of curved canals was associated with a decrease in untouched areas, an increase in root canal volume and maintenance of canal trajectory. In addition, all systems were safe and provided similar root canal shapes. (AU)

FAPESP's process: 16/19956-5 - Quality analysis of the preparation and retreatment of different instruments associated or not to different protocols agitation irrigant
Grantee:Jussaro Alves Duque
Support Opportunities: Scholarships in Brazil - Doctorate