There remains a growing belief among clinicians that obturation is to blame for endodontic failures. This notion has more recently fallen under scrutiny as researchers have discovered that the most thorough obturation can only reflect the quality of the cleaning and shaping of the canal. In fact, a number of researchers point to the thorough use of irrigants—making sure that the debris, and irrigant itself is lifted completely out of the canal, not forced out the apex—as the most important determinant in the long-term success of an endodontic procedure. The right irrigants, when used properly, eliminate harmful microorganisms and bacteria in the root and tubules, and prevent recontamination, even long after the RCT (root canal therapy) is complete. The recently acknowledged vital role of irrigants stands to reason, as RCT itself was born out of the necessity to treat the infected, and very often painful, dentinal tubules and roots that traditional restorative dentistry couldn't address.