Anansushatgul, C., Sutthiprapaporn, P. , Osatalert , B. , Waraussawapati , K. , Yapanan , P. and Samaksamarn, T. 2022. Second Mesiobuccal Root Canal of Permanent Maxillary First Molars Detection Using Cone Beam Computed Tomography and Root Canal Staining Technique. Khon Kaen University Dental Journal. 25, 2 (Jul. 2022), 1–13.