Abiddinda, Agustin, W.S., Rinastiti, M. and Ratih, D.N. 2023. Management missed canal tooth and broken file using ultrasonic instrument. Dental Journal. 56, 4 (Sep. 2023), 255–260. DOI:https://doi.org/10.20473/j.djmkg.v56.i4.p255-260.