Bacteriological and Mechanical Evaluation of Antibacterial Filler-Containing Composite Resins

The antibacterial effect restorative materials is important for obtaining good prognosis. The purpose of this study was to evaluate the antibacterial effect of trial composite resins which were made with Clearfil SC II and antibacterial powder as a filler. Four kinds of antibacterial powder were used: two kinds of Cellewall; far infrared radiating ceramic materials YYT 1 and YYT 1A, Bactekiller; antibacterial zeolite and Zeomic; zeolite with antibacterial ion were mixed with Clearfil SC II at the content of 5, 10, 15, 20, 30, 40, 50 wt %. Cariogenic bacteria Streptococcus mutans Ingbritt, was used in this experiment. Disks were placed in petri dishes and the width of inhibitory zone was evaluated after 24 hours. In order to evaluate the effect of saline solution, the disks were stored in saline solution for 24 and 48 hours and the inhibitory zone were also evaluated same condition. The conclusion is that the new composite resins containing Zeomic had a strong antibacterial effect against S. mutans and this effect of Zeomic was not reduced after storage in saline solution.