A Rare Case of a Maxillary First Molar with Three Mesio-Buccal Canals

The maxillary first molar has the highest failure rate of root canal treatment, with missing canals being one of the most common causes of failure. This case illustrates the wide range of root canal anatomy in the maxillary first molar. Therefore, during endodontic care, anatomical variation should be taken into account by radiographic and clinical evaluations.