Evaluation of irrigation methods in removing calcium hydroxide from mandibular molar root canals.
Mesial and distal canals of 30 mandibular molars were prepared with the WaveOne Primary (25/.08) and Large file (40/.08), respectively. All canals were then filled with Ca(OH)2. The teeth were divided into the following 3 treatment groups (each with n = 10): (1) instrumentation with needle irrigation, (2) instrumentation with irrigation and passive ultrasonic activation (PUI), and (3) the GentleWave® System, without instrumentation.
The study confirmed the difficulty in removing Ca(OH)2 from root canals using conventional methods. The GentleWave® System removed the paste within 90 seconds using water irrigation alone.