A modified dentine infection model with fluorescent lipopolysaccharide and lipopolysaccharides sampling technique to compare XP-Endo finisher and passive ultrasonic irrigation.

Aim: The lipopolysaccharides-dentine-infection (LPS-dentine-infection) models and sampling techniques frequently used to evaluate LPS disinfection have limitations. In this study, a LPS-dentine-infection model was devised using fluorescent conjugate LPS. Secondly, a sampling technique using cryogenic grinding for intraradicular LPS analysis was evaluated.