Results showed that mechanical active irrigation reduces post-operative pain .
It improved debridement , canal/isthmus cleanliness .
It also improved delivery of irrigant up to working length .
Bacterial count was more with active irrigation , though not significant .
There is no effect on long-term periapical healing .
Conclusion It may be concluded that mechanical active irrigation devices are beneficial in reducing post-operative pain and improving canal and isthmus cleanliness during Endodontics
Objective Irrigant activation has been cl aim ed to be beneficial in in vitro and clinical studies .
This systematic review aims to investigate the clinical efficiency of mechanically activated irrigants and conventional irrigation .
In vivo debridement efficacy of ultrasonic irrigation following hand-rotary instrumentation in human mandibular molars.
This study histologically compared the in vivo debridement efficacy of h and /rotary canal preparation versus a h and /rotary/ultrasound technique in mesial root canals of vital m and ibular molars . Group 1 consisted of 16 teeth prepared with a h and /rotary technique  whereas group 2 consisted of 15 teeth  prepared in similar fashion but followed by 1 min of ultrasonic irrigation , per canal , utilizing an ultrasonic needle in a MiniEndo unit . Five uninstrumented m and ibular molars served as histologic controls . After extraction and histologic preparation , 0.5 microm cross-sections , taken every 0.2 mm from the 1- to 3-mm apical levels , were evaluated for percentage of tissue removal . Nonparametric analysis revealed mean percent canal and isthmus cleanliness values to be significantly higher for group 2 at all levels evaluated , except one . In conclusion , the 1 min use of the ultrasonic needle after h and /rotary instrumentation result ed in significantly cleaner canals and isthmuses in the mesial roots of m and ibular molars
Results showed that mechanical active irrigation reduces post-operative pain .
It improved debridement , canal/isthmus cleanliness .
It also improved delivery of irrigant up to working length .
Bacterial count was more with active irrigation , though not significant .
There is no effect on long-term periapical healing .
Conclusion It may be concluded that mechanical active irrigation devices are beneficial in reducing post-operative pain and improving canal and isthmus cleanliness during Endodontics
Objective Irrigant activation has been cl aim ed to be beneficial in in vitro and clinical studies .
This systematic review aims to investigate the clinical efficiency of mechanically activated irrigants and conventional irrigation .