For disinfection of the root canal system, irrigation is key in reducing the number of bacteria within the root canal and helping to control periapical disease. This enforces the need for effective irrigation when dealing with re-treatment cases. Additionally, greater than ever patient expectation of success makes it essential to optimize the disinfection process during endodontic treatment. It seems logical to expect best results from an irrigant with good disinfection power, in relation to the causative organisms, when it is in contact with the bacteria for an adequate time period within...