Bui, Chi, Ly Bich, and Huynh Hien. 2022. “Research on Clinical Characteristics and Clinical Healing Assessment After Endodontic Surgery Using Ultrasonic Tip and Root -End Filling Material by MTA”. Science and Technology Development Journal: Health Sciences 3 (2), 443-51. https://doi.org/https://doi.org/10.32508/stdjhs.v3i2.524.