Comparison the antibacterial effect of green-synthetizednano-silver with calcium hydroxide in infected canals with EnterococcusFaecali

Background and Aim : Endodontic treatment is a predictable process which its success rate isbetween ۶۸% and ۸۶%. The most important cause of failure of root canal treatment involves thepresence of bacteria. Enterococcus faecalis is one of the most common bacteria that cause rootcanal treatment failed. By placing medicine inside the canal, you can prevent the growth of bacteriain the area of the canal. Calcium hydroxide, which is used as the most common medicine insidecanals, cannot completely destroy Enterococcus faecalis. The use of new materials, such asnanoparticles can be promising.Methods : In this study, silver nanoparticles were made by the green method in combination withtannic acid. Then MIC and MBC of nanosilver particles, tannic acid and calcium hydroxide weredetected. Then, the MBC for each material was measured. Then the obtained concentration of thematerial was placed in ۴۸ teeth that were randomly had divided into three groups (nanosilver,tannic acid, calcium hydroxide). After ۲۴ hours, samples were taken from all the teeth and theaverage number of enterococcus faecalis colonies in both groups was checked together.Results : By examining the number of Enterococcus faecalis colonies after ۴۸ hours, it was showedthat cleaning the channels by silver nanoparticles does not have significant difference by calciumhydroxide (P value > ۰.۵). But tannic acid showed significantly less effect than these twosubstances (P<۰.۱).Conclusion : It seems that the use of silver nanoparticles in endodontic treatments can be aseffective as calcium hydroxide and is a considerable antibacterial material for this purpose and canbe a good substitute for calcium hydroxide.

کلیدواژه ها:

Antimicrobial effect ، nanoparticle ، Enterococcus Faecalis ، Nanosilver