Evaluation of the Antibacterial Efficacy of QMix and AgNP Solutions in Root Canals of Primary Molars: An In-Vitro Study

Purpose The study aimed to evaluate QMix(2in1) and silver nanoparticles (AgNPs) solution in eliminating Enterococcus faecalis (E. faecalis) bacteria within root canals of primary molars. Materials and methods The study sample consisted of 45 extracted primary molars, which were divided into three groups: Group 1 (control) NaOCl 5.25%, Group 2 (experimental) QMix(2 in 1), and Group 3 (experimental) AgNPs 4000 ppm. The root canals were sterilized within an autoclave and then contaminated with E. faecalis bacteria. The root canals were irrigated for five minutes in a quantity of 3 ml using a 31-gauge irrigation needle, and then bacterial smears were taken. Results Sodium hypochlorite, AgNPs, and QMix(2in1) effectively reduced the bacterial count of Enterococcus within root canals of primary molars. There were statistical differences between all groups. QMix(2in1) solution showed the greatest antibacterial efficacy, then NaOCl solution and AgNPs solution. Conclusion All irrigation solutions used are effective in eliminating E. faecalis. QMix(2in1) can be considered a good alternative to sodium hypochlorite in irrigation root canals of primary teeth.