Sirisak, W. “Endodontic Management of a Maxillary First Molar with a Separated Instrument and a Second Mesiobuccal Canal (MB2): A Case Report”. JOURNAL OF LOEI PROVINCIAL PUBLIC HEALTH OFFICE, vol. 3, no. 1, July 2025, pp. 1-14, https://he03.tci-thaijo.org/index.php/JOPOLO/article/view/4556.