scholarly journals Endodontic retreatment of curved root canals using the dual wavelength erbium, chromium:yttrium, scandium, gallium, garnet, and diode 940-nm lasers and the XP-Endoshaper/finisher technique

2020 ◽  
Vol 4 (4) ◽  
pp. 211-216
Author(s):  
Riman Nasher ◽  
Ralf-Dieter Hilgers ◽  
Norbert Gutknecht
Keyword(s):  
Duty Cycle ◽  
Laser Scanning ◽  
Ethylenediaminetetraacetic Acid ◽  
Smear Layer ◽  
Dual Wavelength ◽  
Apical Region ◽  
Root Canals ◽  
Significant Difference ◽  
Endodontic Retreatment ◽  
Curved Root Canals

Abstract Purpose The aim of this quantitative study was to compare between a dual-wavelength laser (Er,Cr:YSGG, diode 940 nm) to the XP-Endoshaper/finisher combined with ethylenediaminetetraacetic acid (EDTA) 17% technique in removing secondary smear layer created during endodontic retreatment of curved canals. Methods Twenty-four human curved root canals were endodontically prepared and filled with AH-sealer and Reciproc® Gutta percha cones. The fillings were removed after 6 weeks, and the samples were randomly divided into 3 groups: A, negative control: irrigated with distilled water; B, XP-Endoshaper/finisher with EDTA 17%; and C Er,Cr:YSGG (2 W, 20 Hz, 50 μs) and diode 940 nm (2 W, 50% duty cycle). The canals were split longitudinally, and a laser scanning microscope (VK-X100K, VK-X200K, Keyence, Osaka, Japan) was used to capture images with the magnification of × 1000 from the canals. The images were scored by three blinded dentists using the Hülsmann scoring system, and a statistical analysis was carried out. Results A significant difference between the apical regions of groups B and C (p = 0.0010) was observed, with group C showing a cleaner apical region. However, this difference is cancelled out when comparing all areas of the canals (t = 1.43, df 21 p = 0.1663). Conclusion Within the limitations of this study, it can be concluded that a dual laser wavelength protocol (Er,Cr:YSGG (2 W, 20 Hz, 50 μs) and diode 940 nm (2 W, 50% duty cycle) may be positive in removing the secondary smear layer formed during endodontic retreatment cases of curved root canals.

scholarly journals Removal of Debris and Smear Layer in Curved Root Canals Using Self-Adjusting File with Different Operation Times – A Scanning Electron Microscope Study

2011 ◽  
Vol 1 (1) ◽  
pp. 1 ◽  
Author(s):  
Senem YİĞİT ÖZER ◽  
Özkan ADIGÜZEL ◽  
Sadullah KAYA
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Microscope Study ◽  
Electron Microscope Study ◽  
Smear Layer ◽  
Scanning Electron Microscope Study ◽  
Root Canals ◽  
Significant Difference ◽  
Curved Root Canals ◽  
Scanning Electron

Aim: Debridement during root canal treatment is mandatory and it is provided by means of chemomechanical instrumentation and irrigation methods. This article analysis the debridement capacity of a novel system, SAF and its special irrigation device when used with different operation times in curved root canals. Methodology: 30 mesiobuccal root canals of maxillary molars were instrumented using SAF. Teeth were divided into three groups. In Group 1, 10 new SAF files were used for operation for 4 minutes. In Group 2, the 4-min previously used SAF files were operated in the same manner. In Group 3, the 8-min previously used SAF files were operated. During SAF operation 2.6 % NaOCl and 17 % EDTA were used alternately in all groups. Debris and smear layer removal were evaluated for the apical thirds under scanning electron microscope. Results: Non-used, 4-min preused, and 8-min preused SAF efficiently removed debris and smear layer in the apical thirds. There were no significant difference among the groups in terms of debridement. Conclusions: When SAF is operated in curved root canals with continous flow of irrigation it results in debris and smear-free canal walls in the critical apical thirds within 12 minutes.     How to cite this article: Yiğit Özer S, Adıgüzel Ö, Kaya S. Removal of debris and smear layer in curved root canals using self-adjusting file with different operation times - A scanning electron microscope study. Int Dent Res 2011;1:1-6.   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

Effect of precurving endosonic files on the amount of debris and smear layer remaining in curved root canals

1992 ◽  
Vol 18 (12) ◽  
pp. 616-619 ◽  
Author(s):  
P.J. Lumley ◽  
A.D. Walmsley ◽  
R.E. Walton ◽  
J.W. Rippin
Keyword(s):  
Smear Layer ◽  
Root Canals ◽  
Curved Root Canals

scholarly journals Evaluation of four final irrigation protocols for cleaning root canal walls

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Li ◽  
Qian Zhang ◽  
Xiaoying Zou ◽  
Lin Yue
Keyword(s):  
Root Canal ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Smear Layer ◽  
Confocal Laser ◽  
Bacterial Survival ◽  
Bacterial Inhibition ◽  
Layer Removal ◽  
Significant Difference ◽  
Canal Systems

Abstract The aim of this study was to compare the efficiency of four final irrigation protocols in smear layer removal and bacterial inhibition in root canal systems. Thirty roots inoculated with Enterococcus faecalis were prepared with ProTaper Universal files. The teeth were disinfected by conventional needle irrigation, sonic agitation using the EndoActivator device, passive ultrasonic irrigation, or an M3 Max file. Teeth with no root canal preparation served as blank controls for the establishment of the infection baseline. Teeth with preparation but no final irrigation served as a post-instrumentation baseline. After the final irrigation, the teeth were sectioned in half. One half of each tooth was examined by scanning electron microscopy (SEM) to assess smear layer removal using a five-point scale. The other half was examined by confocal laser scanning microscopy (CLSM) using the LIVE/DEAD BackLight bacterial viability kit to evaluate the depth of bacterial survival in dentinal tubules. SEM analysis revealed no significant difference in smear layer removal throughout the whole canal among the EA, PUI, and M3 Max groups (P > 0.05). CLSM revealed that PUI achieved the greatest bacterial inhibition depth in the coronal ((174.27 ± 31.63) μm), middle ((160.94 ± 37.77) μm), and apical ((119.53 ± 28.49) μm) thirds of the canal (all P < 0.05 vs. other groups). According to this comprehensive SEM and CLSM evaluation, PUI appears to have the best infection control ability in root canal systems.

scholarly journals Influence of Apical Enlargement in Cleaning of Curved Canals Using Negative Pressure System

2014 ◽  
Vol 25 (5) ◽  
pp. 430-434 ◽  
Author(s):  
Karina Torales Lorencetti ◽  
Yara Teresinha Corrêa Silva-Sousa ◽  
Gabriel Elias do Nascimento ◽  
Danielle Cristine Furtado Messias ◽  
Vivian Colucci ◽  
...  
Keyword(s):  
Negative Pressure ◽  
Smear Layer ◽  
Double Blind ◽  
Design Data ◽  
Pressure System ◽  
Root Canals ◽  
Significant Difference ◽  
Double Blind Design ◽  
Post Hoc ◽  
Scanning Electron

This study aimed to evaluate, by scanning electron microscopy (SEM), the cleaning of canal walls with moderate curvature subjected to biomechanical preparation with different final diameters using apical negative pressure irrigation. Thirty-two mesiobuccal roots of molars were divided into 4 groups (n=8) according to the instrument's final diameter: GI: 30.02, GII: 35.02, GIII: 40.02 and GIV: 45.02. Irrigating procedure was performed at each change of instrument with 1% NaOCl using the Endovac system. Final irrigation was conducted with 17% EDTA for 5 min. The SEM photomicrographs were evaluated under 35× and 1000× magnification, by three calibrated examiners, in a double-blind design. Data were submitted to Kruskal-Wallis and Dunn's post hoc tests (α=0.05). Canals instrumented with 30.02 and 35.02 final diameters showed more debris, statistically different from the other groups (p<0.05). Comparing each root canal third, for the cervical and apical portions no statistically significant difference (p>0.05) was found among the four groups. Regarding the presence of smear layer, canals with 30.02 final diameter showed the highest scores, statistically different from the 45.02 group (p<0.05) and similar to the 35.02 and the 40.02 groups (p>0.05). Although none of the studied diameters completely removed debris and smear layer, it may be concluded that instrumentation with higher final diameters was more effective in cleaning the root canals with moderate curvature.

scholarly journals Cervical shaping in curved root canals: comparison of the efficiency of two endodontic instruments

2002 ◽  
Vol 16 (4) ◽  
pp. 327-331
Author(s):  
Sandra Soares Kühne Busquim ◽  
Marcelo dos Santos
Keyword(s):  
Nonparametric Test ◽  
Root Canals ◽  
Significant Difference ◽  
Curved Root Canals

The aim of this study was to determine the removal of dentin produced by number 25 (0.08) Flare files (Quantec Flare Series, Analytic Endodontics, Glendora, California, USA) and number 1 e 2 Gates-Glidden burs (Dentsply - Maillefer, Ballaigues, Switzerland), in the mesio-buccal and mesio-lingual root canals, respectively, of extracted human permanent inferior molars, by means of measuring the width of dentinal walls prior and after instrumentation. The obtained values were compared. Due to the multiple analyses of data, a nonparametric test was used, and the Kruskal-Wallis test was chosen. There was no significant difference between the instruments as to the removal of dentin in the 1st and 2nd millimeters. However, when comparing the performances of the instruments in the 3rd millimeter, Flare files promoted a greater removal than Gates-Glidden drills (p > 0.05). The analysis revealed no significant differences as to mesial wear, which demonstrates the similar behavior of both instruments. Gates-Glidden drills produced an expressive mesial detour in the 2nd and 3rd millimeters, which was detected trough a statistically significant difference in the wear of this region (p > 0.05). There was no statistically significant difference between mesial and lateral wear when Flare instruments were employed.

Efficacy of the NaviTip FX Irrigation Needle in Removing Post Instrumentation Canal Smear Layer and Debris in Curved Root Canals

2009 ◽  
Vol 35 (9) ◽  
pp. 1270-1273 ◽  
Author(s):  
Osvaldo Zmener ◽  
Cornelis H. Pameijer ◽  
Susana Alvarez Serrano ◽  
Renato Mioto Palo ◽  
Elaine Faga Iglesias
Keyword(s):  
Smear Layer ◽  
Root Canals ◽  
Curved Root Canals
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