Evaluation of the effectiveness of sodium hypochlorite used with three irrigation methods in the elimination of Enterococcus faecalis from the root canal,in vitro

1997 ◽  
Vol 30 (4) ◽  
pp. 279-282 ◽  
Author(s):  
J.F. SIQUEIRA ◽  
A.G. MACHADO ◽  
R.M. SILVEIRA ◽  
H.P. LOPES ◽  
M. UZEDA
2017 ◽  
Vol 18 (3) ◽  
pp. 214-217
Author(s):  
Vinisha Pandey ◽  
Harsh Priyank ◽  
Abhishek Bagul ◽  
Kishore Kumar Majety ◽  
Parul Verma ◽  
...  

ABSTRACT Introduction Endodontic treatment removes all pathogens, such as Enterococcus faecalis from pulp and root canals. The aim of this study is to assess the usefulness of sodium hypochlorite (NaOCl) in removing E. faecalis from the root canal used with three different irrigation methods. Materials and methods This study was conducted on freshly extracted maxillary incisors. After biomechanical preparation, root canals were injected with E. faecalis. Three groups were made which contained 30 teeth in each group; 2 mL of NaOCl solution was used for irrigation followed by agitation with K-files in group I; 2 mL of NaOCl solution was used for irrigation and ultrasonic agitation was done in group II. In group III, an alternate irrigation with NaOCl and 3% hydrogen peroxide was done. The fourth group (control) was irrigated with sterile saline solution. E. faecalis bacteria were sampled to the root canals with paper points and were transferred to tubes that contained 5 mL of brain heart infusion broth. Tubes were incubated and the presence of broth turbidity was suggestive of bacteria remaining in the root canal. Results All three groups showed no statistically significant difference. However, difference existed between experimental groups and control groups. Conclusion The author concluded that all three methods of application of NaOCl were effective in disinfecting the root canal than the saline solution. Clinical significance No single irrigant has 100% efficiency. Thus by this study, a best irrigating solution with maximum properties can be established. How to cite this article Priyank H, Pandey V, Bagul A, Majety KK, Verma P, Choudhury BK. Evaluation of 4% Sodium Hypochlorite in eliminating Enterococcus faecalis from the Root Canal when Used with Three Irrigation Methods: An in vitro Study. J Contemp Dent Pract 2017;18(3):214-217.


Author(s):  
Jerry Jose ◽  
Ajitha Palanivelu

Objective: Sodium hypochlorite is shown to be a gold standard intracanal irrigant which has shown to have adequate antimicrobial properties and tissue dissolving properties. The toxicity of these irrigants are seen to be high towards various cells. Natural irrigants provide an alternative to show adequate antimicrobial activity and lesser cytotoxicity potential. The current study proposes a novel intracanal irrigant made from coconut and bromelain extract. Material and Methods: 10grams of sodium hydroxide was dissolved in deionized water followed by which 60ml of coconut oil was added to the warm water bath (40C). The final product was left to dry and crushed manually to powder. This powder was then taken in measured quantity to make a final product containing 20% of coconut and 4% of bromelain. The obtained irrigant was then evaluated against Enterococcus faecalis using Agar well diffusion method. Results: For the natural irrigant, the maximum zone of inhibition was seen highest at 22mm against Enterococcus faecalis and 25mm against Candida Albicans. For 3% sodium hypochlorite when compared against Enterococcus faecalis and Candida Albicans showed a maximum zone of inhibition at 33mm against Enterococcus faecalis and 35mm against Candida Albicans. Conclusion: The study shows that the novel irrigant derived from coconut and bromelain extract has a good antimicrobial efficacy against Enterococcus faecalis and Candida albicans. It can be concluded that it has a potential application as a root canal irrigant for root canal disinfection.


2016 ◽  
Vol 31 (3) ◽  
pp. 114
Author(s):  
Matheus Albino Souza ◽  
Liviu Steier ◽  
Giampiero Rossi-Fedele ◽  
Valdir Barth Júnior ◽  
Silvia Dias De Oliveira ◽  
...  

Objective: The purpose of this study was to evaluate, in vitro, the effectiveness of photodynamic therapy and sodium hypochlorite over root canal system infected with Enterococcus faecalis.Methods: The root canals of 45 single-rooted human extracted teeth were enlarged up to a file 60, autoclaved, inoculated with Enterococcus faecalis and incubated for 30 days. The samples were divided into five groups (G1 – n=5; G2-G5 – n=10) according to the protocol of decontamination: G1 (negative control) – no procedure was performed; G2 – distilled water; G3 –  hotodynamictherapy (PDT); G4 – 2.5% sodium hypochlorite (NaOCl); and G5 – 2.5% NaOCl+PDT. Scanning electron microscopy (SEM) were performed to evaluate the effectiveness of proposed treatments. The assessment was made by images of each third at 5000x magnification for the canal wall and 10000x for the exposed tubule area. The presence of bacteria was scored by position ranks from 1 to 45, where the higher the value, the cleanliness of the sample. Data were subjected to one-way ANOVA followed by post-hoc Tukey test (α=0.05).Results: Group 4 (2.5% NaOCl) and 5 (2.5% NaOCl + PDT) had the highest mean of position ranks for all thirds of the root canal in the canal wall, which was statistically different from groups 1, 2 and 3 (p<0.05). Group 3 (PDT), group 4 (2.5% NaOCl) and 5 (2.5% NaOCl+PDT) had the highest mean of position ranks in the exposed tubule area, which was statistically different from groups 1 and 2 (p<0.05).Conclusion: the association of 2.5% sodium hypochlorite + photodynamic therapy can be considered an effective protocol for the elimination of Enterococcus faecalis.


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