Author/Authors :
Sharghi Hashem نويسنده , Gholami Ahmad نويسنده , Ghasemi Younes نويسنده Pharmaceutical Sciences Research Center, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran , Nabavizadeh Mohammadreza نويسنده Department of Endodontics, Dental school, Shiraz University of Medical Sciences, Shiraz, Iran , Abbaszadegan Abbas نويسنده Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran , Safari Azam نويسنده Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran Safari Azam , Mirhadi Hosein نويسنده Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences; Shiraz, Iran. , Kadkhoda Zahra نويسنده Post graduate student, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, IR Iran , Hemmateenejad Bahram نويسنده Department of Chemistry, Shiraz University, Shiraz, IR Iran , Dorostkar Samira نويسنده Department of Chemistry, Shiraz University, Shiraz, IR Iran
Abstract :
[Background]Nanoparticles are made by different methodologies, which can affect the particle’s features. Recently, imidazolium-coated silver nanoparticles with a positive surface charge (PC Im-based AgNPs) have revealed favorable results as a root canal disinfectant. However, the antibacterial potency of these particles against biofilm form of Enterococcus faecalis, as the most resistant organism to eliminate in endodontic treatment, has not been investigated. It can be noted that removing this microorganism is associated with extremely effective disinfection.[Objectives]This study investigated the antibacterial efficacy of PC Im-based AgNPs at 5.7 × 10-8 mol L-1 in comparison with 2.5% sodium hypochlorite (NaOCl) and 2% chlorhexidine as the two broadly used endodontic irrigation solutions against biofilm E. faecalis using quantitative real-time polymerase chain reaction.[Methods]In total, 48 premolar teeth with a single root were infected with E. faecalis and then prepared with ProTaper rotary instruments. The samples were randomly allocated into 4 groups of 12 samples. Sterile saline, PC Im-based AgNPs, NaOCl, and chlorhexidine were used as irrigants. Sampling the root canals was implemented with paper points and Gates-Glidden drills. The reduction in E. faecalis counts was calculated and statistically analyzed by means of the Kruskal-Wallis and Mann-Whitney U tests.[Results]Irrigation with PC Im-based AgNPs or NaOCl was significantly more effective in bacterial count reduction compared to irrigation with chlorhexidine or sterile saline (P < 0.05). There was no significant difference between PC Im-based AgNPs and NaOCl irrigants when either Gates-Glidden drills (P = 0.751) or paper points (P = 0.488) were employed. Chlorhexidine was significantly less efficient than PC Im-based AgNPs and NaOCl solutions (P < 0.001); however, it was significantly better than sterile saline in both sampling approaches (P > 0.001).[Conclusions]The PC Im-based AgNP solution revealed promising results as a root canal irrigant. This solution at 5.7 × 10-8 mol L-1 was effectively able to eliminate biofilm E. faecalis and this was not significantly different from that of 2.5% NaOCl.
