In this study, the combined effects of photodynamic therapy and irrigants in eradicating
common endodontic pathogens are evaluated. Roots of 80 extracted single rooted teeth are
divided into 2 groups (1) mechanical flushing;(2) antibacterial irrigation. After cleaning and
shaping, they are inoculated with either (A) Streptococcus mutans or (B) Enterococcus
faecalis and incubated. They are again subdivided and either only irrigated or irrigated and
lased. Dentin shavings are taken from root canal walls and cultured. Statistical analysis …