![]() ![]() ![]() There is no general agreement of where the best terminal limit for root canal cleaning, shaping, and obturation procedures is located. The most precise definition conceives the apex as being the anatomic point most distant from the incisal edge or occlusal surface of the tooth5, and the term working length as being the distance between a point of reference located on the coronal aspect and a point of reference at the terminal limit of preparation and root canal filling. The apical limit identifies the depth the canal filling may reach in obturation and, among other factors, affects the level of post-operative comfort or discomfort.3ĬHART 1. Success and Failure Analysis Apical limit of debridement and filling – (Swartz et al.4). This step involves measuring the canal length in order to identify the apical limit of debridement.2 This defines the depth to which instruments may penetrate into the root canal and, consequently, the depth at which tissues, impurities, metabolites, and material(s) remain and the depth to which distance other undesirable components need to be removed. Determining the working length is one of the first steps in endodontic therapy. They focus attention on the apical region with the certainty that their examination will obtain pertinent information regarding the periapical tissues.Īlthough partially true, this belief that the success of endodontic treatment is linked to the apical location of its filling shows the importance of correctly identifying and maintaining the working length in endodontic treatment ( Chart 1). The conventional assessment method evaluates the result of the endodontic treatment by the apical position of its obturation, even though it has been proven that the location of the apical foramen is not invariably located at the root apex.1 Despite this knowledge, the majority of practitioners still routinely use this location to determine the final quality of an endodontic treatment. One of these paradoxes involves examining the apical extent in order to evaluate root canal debridement and filling. The clinical practice of endodontics is subject to some paradoxes. ![]()
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