Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 14 2 2017 08 06 100 104 EN Nahid Mohammadzade Akhlaghi Associate Professor, Department of Endodontics, Dental Branch, Islamic Azad University, Tehran, Iran Mahta Fazlyab Assistant Professor, Department of Endodontics, Dental Branch, Islamic Azad University, Tehran, Iran; Iranian Center for Endodontic Research, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2016 01 18 2017 02 12 The significance of clinician’s knowledge about root canal anatomy and its possible variations cannot be overlooked. In some cases, taking advantage of complementary imaging techniques can help achieve a perfect flawless endodontic treatment. This article reports endodontic management of a second maxillary molar that had an uncommon anatomy of the chamber floor. After obtaining a cone-beam computed tomography (CBCT) image, the presence of a second palatal root was confirmed. All four roots were treated and patient’s symptoms were resolved.   https://fid.tums.ac.ir/index.php/fid/article/view/1027 https://fid.tums.ac.ir/index.php/fid/article/download/1027/943