Effectiveness of Removal of Hard Tissue Debris from the Mesial Root Canal System of Mandibular Molars using Different Supplementary Irrigation Protocols: An Original Study.

Introduction: An instrumented and endodontically treated tooth may sometimes impede disinfection by trapping hard tissue as well as the other canal contents at the isthmus level of the canal. Thus, the current study was piloted to assess the competence of two irrigating systems.

Methods: Twenty mandibular with two mesial canals convergent into a single foramen and joined by an isthmus of the human permanent teeth were compared for the two irrigation systems of continuous and intermittent ultrasonic (US) motions of the irrigation.