Development of Periapical Index Score Classification System in Periapical Radiographs Using Deep Learning. - Natdanai Hirata; Panupong Pudhieng; Sadanan Sena; Suebpong Torn-asa; Wannakamon Panyarak; Kittipit Klanliang; Kittichai Wantanajittikul (J. Imaging Inform. Medicine, 2025)