Author/Authors :
Santa-Rosa, Joedy Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Sousa-Neto, Manoel Damião de Department of Restorative Dentistry - Faculty of Dentistry - University of São Paulo - Ribeirão Preto, Brazil , Versiani, Marco Aurelio Department of Restorative Dentistry - Faculty of Dentistry - University of São Paulo - Ribeirão Preto, Brazil , Nevares, Giselle Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Xavier, Felipe Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Romeiro, Kaline Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Cassimiro, Marcely Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Leoni,Graziela Bianchi Department of Restorative Dentistry - Faculty of Dentistry - University of São Paulo - Ribeirão Preto, Brazil , Menezes, Rebeca Ferraz de Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil , Albuquerque, Diana Department of Operative Dentistry and Endodontics - Dental College of Pernambuco, University of Pernambuco - Pernambuco, Brazil
Abstract :
Introduction: This study aimed to perform a rigorous sample standardization and also
evaluate the preparation of mesiobuccal (MB) root canals of maxillary molars with severe
curvatures using two single-file engine-driven systems (WaveOne with reciprocating motion
and OneShape with rotary movement), using micro-computed tomography (micro-CT).
Methods and Materials: Ten MB roots with single canals were included, uniformly
distributed into two groups (n=5). The samples were prepared with a WaveOne or OneShape
files. The shaping ability and amount of canal transportation were assessed by a comparison
of the pre- and post-instrumentation micro-CT scans. The Kolmogorov-Smirnov and t-tests
were used for statistical analysis. The level of significance was set at 0.05. Results:
Instrumentation of canals increased their surface area and volume. Canal transportation
occurred in coronal, middle and apical thirds and no statistical difference was observed
between the two systems (P>0.05). In apical third, significant differences were found between
groups in canal roundness (in 3 mm level) and perimeter (in 3 and 4 mm levels) (P<0.05).
Conclusion: The WaveOne and One Shape single-file systems were able to shape curved root
canals, producing minor changes in the canal curvature.
Keywords :
Micro-Computed Tomography , OneShape , Reciprocating Motion , Rotary System , WaveOne
