Chemical disinfection is an important cornerstone of a successful outcome because it reaches bacteria or fungi present in dentinal tubules and in the crevices, fins, and ramifications of a root canal system. The main goal of instrumentation is to facilitate effective irrigation, disinfection, and filling. Biomechanical preparation & chemical preparation are used concomitantly in order to debride the root canal system. At the time of biomechanical preparation suitable irrigants are utilized which help in accomplishing debridement and disinfection of the root canal system. Mechanical impacts of irrigants are created by the backward and forward flow of the irrigation solution amid cleaning and shaping of the contaminated root canals, altogether lessening the bacterial load.