scholarly journals Scanning Electron Microscopic Evaluation of Debris and Smear Layer after Use of Revo-S and CMA Instruments in Straight Root Canals

2015 ◽  
Author(s):  
Zouiten S ◽  
Jemâa M ◽  
Dagna A
Keyword(s):  
Smear Layer ◽  
Electron Microscopic ◽  
Root Canals ◽  
Microscopic Evaluation ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

scholarly journals Scanning Electron Microscopic Evaluation of Root Canal Walls after shaping with Different Single-use Rotary Systems

2016 ◽  
Vol 5 (2) ◽  
pp. 93-98
Author(s):  
Alberto Dagna ◽  
Riccardo Beltrami ◽  
Stefano Bianchi ◽  
Claudio Poggio ◽  
Giulia Gastaldo
Keyword(s):  
Analysis Of Variance ◽  
Root Canal ◽  
Statistical Tests ◽  
Smear Layer ◽  
Electron Microscopic ◽  
Root Canals ◽  
Microscopic Evaluation ◽  
Scanning Electron Microscopic ◽  
Single Use ◽  
Scanning Electron

ABSTRACT The aim of the present study was to investigate the cleaning efficacy of four new single-use rotary nickel–titanium (NiTi) systems. A total of 48 single-rooted freshly extracted teeth were divided into four groups. Root canals were shaped with the single-use NiTi systems (ProTaper Next, F360, OneShape and F6 SkyTaper) using 5.25% NaOCl and 17% ethylenediaminetetraacetic acid (EDTA) solutions. Specimens were fractured longitudinally and prepared for scanning electron microscopic (SEM) analysis at standard magnification of 2,500?. The presence/absence of debris smear layer and smear layer at coronal, middle, and apical third of each canal were evaluated using a five-step scale for scores. Numeric data were analyzed using Kruskal–Wallis and Mann–Whitney U statistical tests and significance was predetermined at p< 0.05. Analysis of variance test showed no significant differences among the NiTi systems (p > 0.05). The same results were assessed considering the smear layer scores. Analysis of variance confirmed that the apical third of the canal maintained a higher quantity of debris and smear layer after preparation of all the samples. All the single-use rotary NiTi systems left dentinal walls generally free of debris, even if a small amount of smear layer is visible, especially in the apical third of the root canal. All tested single-use systems seem to be effective in removing smear layer from root canals, if irrigating protocols are respected. How to cite this article Dagna A, Gastaldo G, Beltrami R, Bianchi S, Poggio C. Scanning Electron Microscopic Evaluation of Root Canal Walls after shaping with Different Single-use Rotary Systems. Int J Experiment Dent Sci 2016;5(2):93-98.

scholarly journals A scanning electron microscopic evaluation of different root canal irrigation regimens

2006 ◽  
Vol 20 (3) ◽  
pp. 235-240 ◽  
Author(s):  
Chaves Medici Mônika ◽  
Izabel Cristina Fröner
Keyword(s):  
Sodium Hypochlorite ◽  
Root Canal ◽  
Ricinus Communis ◽  
Smear Layer ◽  
Electron Microscopic ◽  
Canal Irrigation ◽  
Root Canals ◽  
Root Canal Irrigation ◽  
Microscopic Evaluation ◽  
Scanning Electron

The purpose of this study was to assess the effectiveness of endodontic irrigants in removing the smear layer from instrumented root canal walls using Scanning Electron Microscopy (SEM). The endodontic irrigants used were: 1% sodium hypochlorite (NaOCl); 1% NaOCl mixed to 17% EDTAC; 2% chlorhexidine gel; and Ricinus communis gel. Photomicrographs of the middle and apical thirds were evaluated with the aid of the Fotoscore - v. 2.0 software. The results indicated that the mixture of sodium hypochlorite and EDTAC completely removed the smear layer from dentinal walls. The other endodontic irrigants were not as efficient in cleansing the root canals.

scholarly journals Effectiveness of a Canal Brush on Removing Smear Layer: A Scanning Electron Microscopic Study

2013 ◽  
Vol 24 (6) ◽  
pp. 580-584 ◽  
Author(s):  
Eleni Protogerou ◽  
Ioanna Arvaniti ◽  
Ioannis Vlachos ◽  
Marouan Georgios Khabbaz
Keyword(s):  
Statistical Difference ◽  
Optical Microscope ◽  
Smear Layer ◽  
Electron Microscopic ◽  
Root Canals ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
Group A ◽  
Group B ◽  
Scanning Electron

This study evaluated the effectiveness of a highly flexible endodontic brush made of polypropylene canal brush (CanalBrush; Coltène) on smear layer removal from the canal walls when used according to the manufacturer's recommendations. Forty-four single-rooted mandibular incisors were prepared to apical size 30/0.06 and randomly divided into three groups A, B and C, where the final irrigation regimen was 10 mL 17% EDTA and 10 mL 2.5% NaOCl for group A, 10 mL EDTA, 5 mL NaOCl, CanalBrush for 20 s at 450 rpm and 5 mL NaOCl for group B, 10 mL NaOCl, CanalBrush and 10 mL NaOCl for group C. One medium-sized CanalBrush was used for each root canal and all brushes were examined under the optical microscope after application to evaluate bristle deformation. Afterwards, roots were split longitudinally and the presence of smear layer was evaluated under a scanning electron microscope. Used brushes invariably exhibited bristle deformation. Group C exhibited the highest means of smear layer in all thirds. Comparing the apical thirds in all groups, there was no statistical difference between groups A and B (3.64±0.48 and 3.68±0.62 respectively), while group C exhibited significantly higher scores (3.9±0.28) than the other two groups. In conclusion, the CanalBrush proved unable to remove smear layer from the instrumented root canals, when used according to the manufacturers' instructions.

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