Effectiveness of Root Canal Debris Removal Using Passive Ultrasound Irrigation with Chlorhexidine Digluconate or Sodium Hypochlorite Individually or in Combination as Irrigants

2008 ◽  
Vol 9 (5) ◽  
pp. 68-75 ◽  
Author(s):  
Rafael Brandao Ferreira ◽  
Melissa Andreia Marchesan ◽  
Yara Teresinha Silva-Sousa ◽  
Manoel Sousa-Neto
Keyword(s):  
Sodium Hypochlorite ◽  
Root Canal ◽  
Distilled Water ◽  
Chlorhexidine Digluconate ◽  
Canal Irrigation ◽  
Root Canals ◽  
Root Canal Irrigation ◽  
Debris Removal ◽  
Group 2

Abstract Aim The aim of this in vitro study was to evaluate the cleaning capacity of different auxiliary chemical substances energized with ultrasound in radicular dentin using morphologic analysis. Methods and Materials Twenty-eight single-canal, mandibular incisors were prepared with the Hero 642 canal preparation system following the sequence: 25/12, 30/06, 35/02, and 40/02, 1 mm from the apex. The specimens were then divided into four groups of seven teeth. During biomechanical preparation the teeth were irrigated with 2 ml of distilled water between files. Each group of specimens (n=7) received a final irrigation with 100 ml of the following irrigants that were activated with ultrasound for 3 minutes: Group 1- distilled water; Group 2- 0.2% chlorhexidine digluconate (CHX); Group 3- 2.5% sodium hypochlorite (NaOCl); and Group 4-the filtrate obtained after combining 0.2% CHX and 2.5% NaOCl. The apical portions of the root canals from each group were then submitted to histological processing and analyzed using optical microscopy. Results Results showed statistical differences between the groups (p<0.01). Groups 1 and 2 (distilled water and 0.2% CHX respectively) were statistically similar in terms of a greater amount of debris, whereas 2.5% NaOCl and the filtrate were more efficient in removal of debris. Conclusion There is no additional benefit in terms of debris removal from root canal walls by irrigating with the filtrate obtained from the combination of NaOCl and CHX when compared to using NaOCl alone. Clinical Significance The findings of this study suggest the time and expense of preparing and using a combination of NaOCl and CHX is not warranted compared to using NaOCl alone for root canal irrigation. Citation Ferreira RB, Marchesan MA, Silva-Sousa YT, Sousa-Neto M. Effectiveness of Root Canal Debris Removal Using Passive Ultrasound Irrigation with Chlorhexidine Digluconate or Sodium Hypochlorite Individually or in Combination as Irrigants. J Contemp Dent Pract 2008 July; (9)5:068-075.

scholarly journals Effectiveness of photon-initiated photoacoustic streaming in root canal models with different diameters or tapers

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Cheng Wen ◽  
Yuanyuan Kong ◽  
Jian Zhao ◽  
Yang Li ◽  
Ya Shen ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Root Canal ◽  
Distilled Water ◽  
Canal Irrigation ◽  
Root Canals ◽  
Atp Assay ◽  
Root Canal Irrigation ◽  
Average Fluorescence Intensity ◽  
Different Diameters ◽  
Average Fluorescence

Abstract Background This study aimed to compare the use of photon-initiated photoacoustic streaming (PIPS) and conventional needle irrigation (CNI) in conjunction with different concentrations of sodium hypochlorite (NaOCl) to remove Enterococcus faecalis (E. faecalis) suspended bacteria and biofilms from root canal systems with different diameters or tapers. Methods Artificial root canal samples (n = 480) were randomly divided into three groups (n = 160/group). The canals were prepared to fit file sizes #10/.02, #25/.02, or #25/.06. The size #10/.02 group was incubated for seven days. The size #25/.02 or #25/.06 group was incubated for 2 days. A stable biological model of E. faecalis infection was established. The root canals were washed with distilled water or with 1%, 2%, or 5.25% NaOCl combined with CNI or PIPS. Bacterial suspensions and biofilms were assessed using an ATP assay kit and fluorescence microscopy. Image-Pro Plus was used to analyse the average fluorescence intensity to determine the most suitable root canal irrigation solution. Results In the CNI and PIPS groups, the ATP value of the 5.25% NaOCl subgroup was the lowest, followed by that of the 2% and 1% NaOCl subgroups. The ATP value of the distilled water subgroup was the highest (P < 0.05). When the root canal taper was 0.02, the ATP value of the #10/.02 + PIPS group was significantly lower than that of the #25/.02 + CNI group (P < 0.05). The average fluorescence intensity of the #10/.02 + PIPS group was lower than that of the #25/.02 + CNI group (P < 0.05). When the apical diameter was #25, the ATP value of the 0.02 taper in the PIPS group was lower than that of the 0.06 taper in the CNI group (P < 0.05), and the average fluorescence intensity of the 0.02 taper + PIPS group was lower than that of the 0.06 taper + CNI group (P < 0.05). PIPS combined with 2% and 5.25% NaOCl effectively improved the long-term antibacterial effect after irrigation and re-culture for 6 h. Conclusions Compared with CNI, PIPS has greater ability to remove bacteria in root canals with a small preparation diameter and a small taper. PIPS with 2% and 5.25% NaOCl exhibited superior antibacterial and bacteriostatic effects.

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 ELECTROLYZED SALINE... AN ALTERNATIVE TO SODIUM HYPOCHLORITE FOR ROOT CANAL IRRIGATION

2018 ◽  
Vol 91 (3) ◽  
pp. 322-327
Author(s):  
Kavita Dube ◽  
Pradeep Jain
Keyword(s):  
Sodium Hypochlorite ◽  
Root Canal ◽  
Electron Microscopic ◽  
Canal Irrigation ◽  
Root Canals ◽  
Root Canal Irrigation ◽  
Custom Made ◽  
Canal Surfaces ◽  
And Storage ◽  
Root Canal Irrigant

Objectives. The aim of this study is to evaluate electrolyzed saline, produced from a custom-made chair side apparatus for its cleaning effect on root canal walls.Methods. A chair side apparatus has been designed to produce and dispense electrolytically activated solutions (Electrolyzed saline) for the purpose of root canal irrigation. Two different solutions, one, which is oxidizing in nature, consisting primarily of Chlorine derivatives and another, reducing in nature, consisting primarily of sodium hydroxide, are obtained. A combination of these two solutions was used for root canal irrigation in extracted teeth. Root canals were split and the samples were subjected to Scanning electron microscopic evaluation.Results. Under the conditions of this study, electrolyzed saline significantly cleaned the root canal surfaces well, opening the dentinal tubules and removing the smear layer.Significance. There has been a constant search for the ideal root canal irrigant. Sodium hypochlorite has been vastly used but its toxicity and storage risks are of concern. Electrolyzed saline has been produced from saline and the apparatus prepares and dispenses the solution chair side, obviating storage needs.

scholarly journals Hypochlorite solution for root canal irrigation that lacks a chlorinated odor

2017 ◽  
Vol 11 (02) ◽  
pp. 221-225
Author(s):  
La-ongthong Vajrabhaya ◽  
Vanida Sangalungkarn ◽  
Ratchapin Srisatjaluk ◽  
Suwanna Korsuwannawong ◽  
Chareerut Phruksaniyom
Keyword(s):  
Root Canal ◽  
Antibacterial Effect ◽  
In Vitro Study ◽  
Commercial Products ◽  
Canal Irrigation ◽  
Hypochlorite Solution ◽  
Root Canal Irrigation ◽  
Chlorine Gas ◽  
Trichloroisocyanuric Acid

ABSTRACT Objectives: This is an in vitro study to develop a formulation of a hypochlorite solution for root canal irrigation that lacks a chlorinated odor. The antibacterial effect, tissue dissolution efficacy, and the cytotoxicity of the solution were assessed in cell culture and were compared with those of commercial sodium hypochlorite (NaOCl) solutions. Materials and Methods: Trichloroisocyanuric acid (TCA) was used as the source of hypochlorite ions in solution. All required properties of the NaOCl irrigant were evaluated and compared with those of original 2.5% NaOCl solutions currently in use. Results: Our results revealed that a TCA 3.5% + 1/6 Buffer-1 solution passed the short-term stability test. Moreover, no odor of chlorine gas was detected by three independent observers. The hypochlorite ion content and pH were stable over an incubation period of 4 weeks. The new solution did not differ from commercial products in terms of the dissolution property on bovine pulpal tissue (P > 0.05). Moreover, the antibacterial effect of this solution on Enterococcus faecalis did not differ from that of the commercial products (P > 0.05). In addition, our biocompatibility analysis demonstrated no difference among the tested solutions (P > 0.05). Conclusions: According to the results of all properties tested, TCA 3.5% + 1/6 Buffer-1 could be considered an option for NaOCl irrigation with the benefit of no detectable chlorine odor.

scholarly journals Effectiveness of NaOCl alone or in combination with EDTA on the diffusion of hydroxyl ions released by calcium hydroxide paste

2006 ◽  
Vol 14 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Mara Cristina Santos Felippe ◽  
Wilson Tadeu Felippe ◽  
Catherine Schmitz Espezim ◽  
Sérgio Fernando Torres de Freitas
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal ◽  
Statistical Significance ◽  
Distilled Water ◽  
Mechanical Preparation ◽  
Group 3 ◽  
Group 2 ◽  
Water Canals ◽  
Group 1

AIM: To evaluate the effect of different irrigant solutions employed during removal and replacement of calcium hydroxide paste on the diffusion of hydroxyl ions through root canal dentine in vitro. METHODOLOGY: Thirty-five maxillary and mandibular human canines with straight and fully developed roots were used. After mechanical preparation up to 1mm short of tooth length, 30 canals were filled with calcium hydroxide paste and 5 canals were left empty; all teeth had their coronal accesses properly sealed. Teeth were placed in plastic containers with distilled water, and pH was read after 30 days when the paste from 20 teeth was renewed. After removal of the paste by endodontic instrumentation and irrigation with distilled water, canals were replenished with newly mixed paste in Group 1 and 2. In these groups, final irrigation was conducted with 5 mL of EDTA followed by 5 mL of NaOCl in specimens in Group 1, and 5 mL of NaOCl only in specimens in Group 2. In 10 teeth the paste was not replenished at 30 days (Group 3). All specimens were returned to the containers with fresh distilled water, and the pH was recorded after another 30 days. The differences between the first (30d) and second (60d) pH readings were calculated and submitted to analysis of variance and individual comparisons using the Scheffeé's test. RESULTS: Results of mean analysis on differences of pH readings showed that greater diffusion had occurred on specimens in Group 3. Individual comparisons using Scheffeé's test showed statistical significance between Groups 2 and 3, and equivalence between all other groups. CONCLUSION: It was concluded that the use of EDTA did not enhance diffusion of hydroxyl ions through root canal dentine.

Influence of the Dentinal Wall on the pH of Sodium Hypochlorite during Root Canal Irrigation

2014 ◽  
Vol 40 (7) ◽  
pp. 1005-1008 ◽  
Author(s):  
Ricardo Gomes Macedo ◽  
Noemi Pascual Herrero ◽  
Paul Wesselink ◽  
Michel Versluis ◽  
Luc van der Sluis
Keyword(s):  
Sodium Hypochlorite ◽  
Root Canal ◽  
Canal Irrigation ◽  
Root Canal Irrigation
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