Endodontisk behandling av kalsifiserte tenner

English summary Endodontic treatment of calcified teeth. Part 2: CBCT-guided access preparation of calcified root canals and teeth treated with fiber posts Nor Tannlegeforen Tid. 2024; 134: 950-61. During endodontic treatment of calcified teeth and teeth with restorative material placed deep in the root canal, traditional access preparation to the root canals may result in significant loss of tooth substance. Such treatments are often time-consuming and associated with a high risk of procedural mishaps. CBCT-guided access preparation has been developed in response to this challenge. The aim of this study was to gather updated knowledge about CBCT-guided access preparation and to validate the precision of the method through an ex-vivo study based on pre- and post-operative microCT scans. Based on available literature and results presented in this study, CBCT-guided access preparation has the potential for high precision. The method can reduce loss of tooth structure and the risk of procedural mishaps when treating calcified root canals. However, CBCT-guided access preparation has potential sources of error and limitations that the dentist should be aware of before applying the method in patient care.