Abstract. Endodontics is the science and art that treats the tooth and periapical tissue from a morphological, structural, physiological and pathological point of view, combining knowledge to comprehensively treat the tooth and surrounding tissues. Because of endodontics comprises the root canal treatment, sufficient knowledge of the internal root anatomy is required. However, this knowledge is not always taught with sufficient quality with respect to some teeth such as the upper first

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... with Vertucci type III classification, due to the complexity involved in this content. At the Faculty of Medical Sciences of Universidad Regional Autónoma de los Andes (UNIANDES) in Ecuador, it is proposed to hold a group of talks on these issues. This research aims to validate educational talks on the treatment of Vertucci type III first premolars. For this purpose, the Neutrosophic Delphi method is applied, which is an extension of Delphi method to the neutrosophic framework. Delphi method allows a group of experts to reach a consensus on a topic of research, in this case on the proposed talks. Neutrosophy is included to incorporate the indeterminacy that exists in experts' evaluation, as well as the use of linguistic terms to perform the evaluations, which is more appropriate when it comes from subjective evaluations carried out by humans.