Over the years we have witnessed an increasingly aware use of CBCT in the endodontic field which has revolutionized the way of approaching endodontics. In addition to improving diagnostic thinking, he has changed the approach by addressing prognostic indications thanks to an ever greater understanding and awareness in decision making first and then in clinical treatment. These considerations, although important, are valid when applied to complex endodontic cases. Among these, the calcification of root canals has always represented a challenge even for the expert endodontists. The risks in severely calcified treatment are represented by the creation of false pathways and perforations as well as by the removal of excessive dentinal tissue with weakening of the tooth structure. Recently, endodontic access guides have been used which can facilitate the retrieval of calcified canal entrances relocated to the most apical position without the use of the operating microscope. This aspect allows the technique to be used even by less experienced operators. Guides can be static and dynamic. In this presentation we will only deal with the statics, which are obtained from the combination of CBCT data and intraoral scanning; thanks to their stable positioning, it allows, through the use of special drills, guided access for finding the calcified canal. In this presentation the advantages and disadvantages of using this method will be considered, trying to understand the main limitations related to the design phase of the guides.