As part of the importance of knowledge about the internal anatomy of the root canal system, it is important to clarify that there is an intimate relationship between the diagnosis with radiographs, the preparation of an adequate access and detailed exploration of the interior of the dental pieces for a better prognosis in endodontic therapy. Objective: The objective of this research is to determine the reported prevalence of two canals in lower central incisors by means of a literature review using tomography and microtomography as an alternative for diagnosis. Materials and methods: The research is a documentary analysis of quantitative, qualitative, theoretical and descriptive type in which digital resources from databases such as academic Google: PubMed, Medigraphic, Elsevier, SciELO, between the years 2018 and 2022 were used. Inclusion and exclusion criteria such as population, follow-up of results, ethnicity, language, studies, search period and relevance based on the central theme were applied. Results: We found that the most prevalent Vertucci classification was Type I 83% , Type II 1% and Type III 16%. Significantly the presence of two canals was more prevalent in central incisors. Conclusions: The most effective method in patients is CBCT imaging, as it allows three-dimensional images to be obtained, allowing the diagnosis of the root canal system in permanent lower central incisors, whose main characteristic is that they present minimal distortions and require less radiation dose for the patient.
Root canals, two-dimensional radiographs, CBCT images, Cone Beam computed tomography.