Efficacy of four different irrigation techniques combined with 60°C 3% sodium hypochlorite and 17% EDTA in smear layer removal

Introduction. Canal irrigation is an important segment of endodontic treatment. The aim of this study was to assess the efficacy of 0.5% NaOCl solutions of different pH values on smear layer removal. Material and Methods. Thirty-two freshly extracted single rooted teeth with gangrenous pulp were used in the study. The samples were divided into four groups of eight teeth in each. Four solutions of 0.5% NaOCl having pH values 5, 7, 9 and 12 respectively, were used during chemomechanical instrumentation with hand instruments and using step back technique. SEM analysis was done to assess the quality of smear layer removal in apical, middle and coronal part of root canal. Presence and quantity of smear layer and detritus was quantified using the scale from 1 to 5. Results. SEM analysis results showed similar results for 0.5% NaOCl solutions of different pH values in root canal cleaning with no statistically significant differences. Conclusion. The most effective cleaning root canal was achieved with 0.5% NaOCl solution of pH 5.

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Evaluation of smear layer removal by EDTAC and sodium hypochlorite with ultrasonic agitation

International Endodontic Journal ◽

10.1046/j.1365-2591.2002.00488.x ◽

2002 ◽

Vol 35 (5) ◽

pp. 418-421 ◽

Cited By ~ 84

Author(s):

D. M. Z. Guerisoli ◽

M. A. Marchesan ◽

A. D. Walmsley ◽

P. J. Lumley ◽

J. D. Pecora

Keyword(s):

Sodium Hypochlorite ◽

Smear Layer ◽

Ultrasonic Agitation ◽

Layer Removal

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Time-dependent effects of chitosan on dentin structures

Brazilian Dental Journal ◽

10.1590/s0103-64402012000400008 ◽

2012 ◽

Vol 23 (4) ◽

pp. 357-361 ◽

Cited By ~ 20

Author(s):

Polliana Vilaça Silva ◽

Débora Fernandes Costa Guedes ◽

Jesus Djalma Pécora ◽

Antonio Miranda da Cruz-Filho

Keyword(s):

Sodium Hypochlorite ◽

Root Canal ◽

Sem Analysis ◽

Smear Layer ◽

Time Dependent ◽

Successful Outcome ◽

Maxillary Canine ◽

Layer Removal ◽

Severe Erosion ◽

Erosive Effect

Complete debridement with smear layer removal are essential measures for achieving a successful outcome of root canal treatment. The aim of this study was to evaluate the effects of chitosan at different concentrations on the removal of the smear layer and on dentin structure after 3 and 5 min of application. Twelve recently extracted maxillary canine teeth were instrumented using the crown-down technique and irrigated with 1% sodium hypochlorite. The specimens were distributed according to the time and concentration of the final irrigating solution: G1: 0.1% chitosan for 3 min; G2: 0.2% chitosan for 3 min; G3: 0.37% chitosan for 3 min; G4: 0.1% chitosan for 5 min; G5: 0.2% chitosan for 5 min; G6: 0.37% chitosan for 5 min. All samples were prepared for SEM analysis. G1 exhibited removal of the smear layer, but not the smear plugs. G2 showed visible and open tubules with slight erosion of the peritubular dentin. Cleaning in G3 was similar to that in G2, however, the erosive effect was greater. There was expansion of the diameter of the tubules in G4; and in G5 and G6, there was severe erosion with deterioration of dentin surface. In conclusion, 0.2% chitosan for 3 min appeared to be efficient for removing the smear layer, causing little erosion of dentin.

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A comparative scanning electron microscopy evaluation of smear layer removal with apple vinegar and sodium hypochlorite associated with EDTA

Journal of Applied Oral Science ◽

10.1590/s1678-77572011000600016 ◽

2011 ◽

Vol 19 (6) ◽

pp. 639-643 ◽

Cited By ~ 2

Author(s):

George Táccio de Miranda Candeiro ◽

Isabela Barbosa de Matos ◽

Clarice Fernandes Eloy da Costa ◽

Cristiane Sá Roriz Fonteles ◽

Mônica Sampaio do Vale

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Sodium Hypochlorite ◽

Smear Layer ◽

Layer Removal ◽

Scanning Electron Microscopy Evaluation ◽

Scanning Electron

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In-Vitro Evaluation of Smear Layer Removal Using 2.5% Sodium Hypochlorite, 0.2% Chitosan and 17% Edta Solution with the three Different Irrigating Solutions Either Applied Alternatively or Mixed Together After Using K-Flexo File System, an Sem Study

Acta Scientific Dental Scienecs ◽

10.31080/asds.2019.03.0656 ◽

2019 ◽

Vol 3 (10) ◽

pp. 96-103

Author(s):

Rohit Chadha

Keyword(s):

Sodium Hypochlorite ◽

File System ◽

Smear Layer ◽

In Vitro Evaluation ◽

Layer Removal ◽

Sem Study ◽

Edta Solution

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Evaluation of 0.5% peracetic acid and 2.5% sodium hypochlorite on smear layer removal of root canal instrumented by three rotary systems

Brazilian Dental Science ◽

10.14295/bds.2014.v17i1.959 ◽

2014 ◽

Vol 17 (1) ◽

pp. 62

Author(s):

Ana Paula Martins Gomes ◽

Lais Dos Santos Lissi ◽

Marcella Batista Pavanello Coelho ◽

Eduardo Galera Da Silva ◽

Frederico Canato Martinho ◽

...

Keyword(s):

Acid Solution ◽

Sodium Hypochlorite ◽

Peracetic Acid ◽

Root Canal ◽

Smear Layer ◽

Sodium Hypochlorite Solution ◽

Font Size ◽

Hypochlorite Solution ◽

Layer Removal ◽

Root Canal Irrigants

Objective: The aim of this study was to evaluate the effect of 0.5% peracetic acid solution and 2.5% sodium hypochlorite solution on smear layer removal of root canal walls after rotary instrumentation. Material and methods: Sixty single-rooted human teeth with standardized length had their canals instrumented by three rotary systems (Biorace, MTwo and Endowave), varying the irrigation solution, as follows (n=10): G1- Biorace System + 0.5% peracetic acid solution; G2- Biorace System + 2.5% sodium hypochlorite solution; G3- MTwo System + 0.5% peracetic acid solution; G4- MTwo System + 2.5% sodium hypochlorite solution; G5- Endowave System + 0.5% peracetic acid solution; G6- Endowave System + 2.5% sodium hypochlorite solution. After instrumentation, the roots were cleaved and the dentin walls were evaluated by SEM at x500 and x2000 magnification for assessing the cleaning of the root canals at the cervical, middle and apical thirds. The analyzed area was quantified according to the total number of tubules present and the percentage of open tubules at each region. Data were submitted to statistical analysis by ANOVA and Tukey tests, at the significance level of 5%. Results: There were no statistical significant differences among the experimental groups. In all groups the smear layer removal at cervical and medium thirds was higher than that of apical third. Conclusion: It was concluded that the cleaning obtained at the apical third was lower in all groups studiedand neither the instrumentation technique nor the irrigating solution was able to promote total smear layer removal from root canal walls. KEYWORDS: Peracetic acid; Root canal irrigants; Scanning electron microscopy; Sodium hypochlorite.

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