Cleaning of endodontic root canal by ultrasonics and Nd:YAG laser beam with fiber optic delivery: scanning electron microscopy, endoscopic and microradiographic analysis

1997 ◽  
Author(s):  
Norberto Berna ◽  
Marco Melis ◽  
Alessandro Benvenuti ◽  
Sebastiano Tosto ◽  
Fabrizio Pierdominici
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Laser Beam ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Fiber Optic ◽  
Scanning Electron

Scanning Electron Microscopy Comparison of the Cleaning Efficacy of a Root Canal System by Nd:YAG Laser and Rotary Instruments

2014 ◽  
Vol 20 (4) ◽  
pp. 1240-1245 ◽  
Author(s):  
Mohammad Samiei ◽  
Seyyed Mahdi Vahid Pakdel ◽  
Sahand Rikhtegaran ◽  
Sahar Shakoei ◽  
Delaram Ebrahimpour ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Smear Layer ◽  
Canal System ◽  
Rotary Instruments ◽  
Root Canal System ◽  
Cleaning Efficacy ◽  
Scanning Electron

AbstractThis study evaluated the cleaning efficacy of a root canal system by Nd:YAG laser and rotary instruments. Sixty single-rooted human teeth were divided into four experimental groups (n=15). In the first group the teeth were prepared with a step-back technique using conventional K-files. In the second and third groups, tooth preparation was carried out using Nd:YAG laser and rotary NiTi instruments, respectively. Teeth in the fourth group were prepared by combined laser and rotary methods. The smear layer remaining on canal walls was then assessed by scanning electron microscopy in the coronal, middle, and apical portions. The comparison of smear layer removal efficacy between groups was carried out by Kruskal–Wallis and Mann–Whitney U tests. The mean grades of smear layer removal in rotary-laser, rotary, laser and step-back techniques were 1.34±0.18, 2.2±0.28, 1.91±0.25, and 2.42 ±0.19, respectively. On the whole, differences between rotary-laser and rotary groups, step-back, and the three other techniques (rotary, laser, and rotary-laser) were significant at p=0.034. Based on the findings of this study, the cleaning efficacy of rotary, laser, and rotary-laser techniques were better than the step-back technique and the combined laser and rotary technique was the most efficient method.

scholarly journals Residual smear layer after root canal instrumentation by using Niti, M-Wire and CM-Wire instruments: A scanning electron microscopy analysis

2018 ◽  
Vol 12 (03) ◽  
pp. 403-409 ◽  
Author(s):  
Ricardo Machado ◽  
Daniel Comparin ◽  
Eduardo Donato Eing Engelke Back ◽  
Lucas da Fonseca Roberti Garcia ◽  
Luiz Rômulo Alberton
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Root Canal ◽  
Smear Layer ◽  
Significant Difference ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis ◽  
Root Canal Instrumentation ◽  
Reciprocating Systems ◽  
Scanning Electron

ABSTRACT Objective: The purpose of this study was to compare the amount of residual smear layer after root canal instrumentation by using Ni-Ti, M-Wire, and CM-Wire instruments. Materials and Methods: Seventy-two mandibular incisors were randomly divided into six groups according to the system used: WaveOne (WO), Reciproc (RP), Unicone (UC), ProTaper Next (PN), Mtwo (MT), and HyFlex (HF). Afterward, the specimens were cleaved in the mesiodistal and buccolingual direction for analysis by scanning electron microscopy. Results: Considering both directions and root canal thirds, there was no difference between HF, MT, and PN. RP, UC, and WO presented a significant difference between the directions, and the cervical third showed a significantly smaller quantity of residual smear layer compared with the apical third. When the systems were compared among them, there was a significant difference only between RP and WO. Conclusions: Residual smear layer observed after instrumentation with the different systems was similar, except for quantities between the reciprocating systems.

scholarly journals Radiographic and scanning electron microscopic assessment of root canal filling remnants after endodontic re-instrumentation

2017 ◽  
Vol 20 (1) ◽  
pp. 80 ◽  
Author(s):  
Luciane Geanini Pena Santos ◽  
Wilson Tadeu Felippe ◽  
Beatriz Dulcineia Mendes Souza ◽  
Andrea Cristina Konrath ◽  
Mabel Mariela Rodríguez Cordeiro ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Root Canal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Root Canals ◽  
Filling Materials ◽  
Ah Plus ◽  
Endodontic Retreatment ◽  
Scanning Electron

<p><strong>Objective: </strong>Failures in endodontic treatment may occur by several reasons. Endodontic retreatment is an interesting alternative to manage this clinical problem. However, it is not possible to completely remove the root canal filling by any current retreatment technique. The aim of this study was to evaluate the presence of residual root canal filling materials after endodontic re-instrumentation. <strong>Material and Methods:</strong> Sixty extracted anterior human teeth were prepared by step-back technique with Flexofiles, K-files and Gates-Glidden (GG) burs. Between the use of each file or bur, root canals were irrigated with sodium hypochlorite (NaOCl). Smear layer was removed by irrigation with ethylenediaminetetraacetic acid and NaOCl. After drying with paper points the root canals were randomly divided into 5 groups (n = 12), according to filling material: Resilon cones/Real Seal sealer or gutta-percha cones and Endofill, Sealapex, AH Plus or MTA Fillapex sealers. After one week, root canal fillings were removed using Eucaliptol and K-files. Root canals were re-instrumented with K-files and GG burs sized larger than the first ones. The removal of root canal filling material was analyzed by radiography and scanning electron microscopy (SEM). Statistical analysis was performed using Binary Logistic Regression test (P &lt; 0.05). <strong>Results: </strong>Radiographic and SEM analysis showed that material from the<strong> </strong>MTA Fillapex group was better removed than that from Endofill, Sealapex, AH Plus and Real Seal groups. <strong>Conclusion: </strong>After re-instrumentation<strong>, </strong>MTA Fillapex group showed less remnants into the root canals than Endofill, Sealapex, AH Plus and Real Seal groups. Residual material was most often found in the apical third.</p><p><strong>Keywords </strong></p><p>Dental radiography; Endodontic retreatment; Root canal filling materials; Scanning electron microscopy.</p>

scholarly journals A Comparison of Er:YAG Laser with Photon-Initiated Photoacoustic Streaming, Nd:YAG Laser, and Conventional Irrigation on the Eradication of Root Dentinal Tubule Infection by Enterococcus faecalis Biofilms: A Scanning Electron Microscopy Study

Scanning ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Burcu Ozses Ozkaya ◽  
Kamran Gulsahi ◽  
Mete Ungor ◽  
Julide Sedef Gocmen
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Enterococcus Faecalis ◽  
Nd:Yag Laser ◽  
Er:Yag Laser ◽  
Dentinal Tubule ◽  
Sem Images ◽  
Apical Position ◽  
Conventional Irrigation ◽  
Scanning Electron

This study evaluated the antimicrobial efficacy of Er:YAG laser activation with photon-initiated photoacoustic streaming (PIPS), Nd:YAG laser disinfection, and conventional irrigation on Enterococcus faecalis biofilms using scanning electron microscopy (SEM). Biofilms were grown on 110 root halves and divided into the following: Groups 1 and 2 (saline and 1% NaOCl with apical position of PIPS, resp.), Groups 3 and 4 (saline and 1% NaOCl with coronal position of PIPS, resp.), Groups 5 and 6 (Nd:YAG laser after saline and 1% NaOCl irrigation, resp.) and Groups 7, 8, and 9 (conventional irrigation with 1% NaOCl, 6% NaOCl, and saline, resp.). SEM images of the apical, middle, and coronal levels were examined using a scoring system. Score differences between Groups 1 and 2 were insignificant at all levels in the remaining biofilm. Group 4 had significantly greater bacterial elimination than Group 3 at all levels. Differences in Nd:YAG laser irradiation between Groups 5 and 6 were insignificant. Groups 7 and 8 were insignificantly different, except at the middle level. Saline group had a higher percentage of biofilms than the others. In this study, PIPS activation with NaOCl eliminates more E. faecalis biofilms in all root canals regardless of the position of the fiber tip.

Sign in / Sign up

Export Citation Format

Share Document