Since decades, irrigants have been delivered into root canal space using
syringes and metal needles of different sizes and tip design. Clinical
researches have shown that classic approach of irrigant delivery results
in ineffective irrigation in areas like anastomoses between canals, fins
and most apical part of the main root canal. Therefore, technological
advances have brought new agitation devices that rely on various
mechanisms of irrigant transfer, soft tissue debridement and removal of
smear layer through manual and machine assisted agitation systems.
Overall review has been concluded that these new agitation systems have
proved better canal cleanliness as compared to traditional syringe
needle irrigation system.