Occurence of dentinal defects after root canal preparation with R-phase, M-Wire and Gold Wire instruments: a micro-CT analysis

BMC Oral Health

Research Article

Luciana Gominho¹  Kaline Romeiro²  Diana Albuquerque²  Andressa de Almeida²  Marcely Cassimiro³  Larissa Costa⁴ 

[1] Department of Odontology, Biological Sciences Unit, Federal University of Campina Grande (UFCG), Campina Grande, PB, Brazil;Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil;Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil;Avenida General Newton Cavalcanti, 1650, 54753-020, Camaragibe, PE, Brazil;Nuclear Department of Energy, Federal University of Pernambuco (UFPE), Recife, PE, Brazil;

关键词: Endodontics;    Root canal therapy;    Root canal preparation;   

DOI  :  10.1186/s12903-017-0387-0

 received in 2017-03-13, accepted in 2017-05-25,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundThis study aims to evaluate the frequency of dentinal defects after root canal preparation with the ProTaper NEXT, K3XF and WaveOne GOLD systems using microcomputed tomography.MethodsSixty permanent mandibular incisors with a single canal were selected. Inspection of the teeth was performed under a stereomicroscope (15x) to observe the presence of pre-existing cracks and fractures lines. Samples were divided into three experimental groups (n = 20): ProTaper NEXT (PTN), K3XF (K3XF) and WaveOne GOLD (WOG). Specimens were scanned through high-resolution microcomputed tomography before and after the preparation of the root canal. Subsequently, all the axial images were examined by two different methods to find possible dentinal defects. Furthermore, an analysis of each millimeter of ten apical millimeters was also performed. The absence or presence of dentinal defects was screened by 3 pre-calibrated blinded examiners.ResultsAfter analysing all 45,720 slices, dentinal defects were observed in 48,33% (22096 slices). PTN, K3XF and WOG groups represented 11,11% (5079 slices), 17,22% (7873 slices) and 20% (n = 9144) of the cross-sectional images, respectively. At 10 apical millimeters (600 slices), 33,33% (200 slices) presented some dentinal defects, representing 7,22% (43 slices), 13,33% (80 slices) and 12,77% (77 slices) of the cross-sectional images in the PTN, K3XF and WOG groups, respectively. All the dentinal defects presented in the postoperative images existed in the images prior to instrumentation.ConclusionsThere was no correlation between the preparation of a root canal using the PTN, K3XF and WOG systems and the formation of new dentinal defects.

【 授权许可】

CC BY   
© The Author(s). 2017