Phạm TH, Đỗ TH, Nguyễn CT, Nguyễn TNA, Phan TBH, Nguyễn LN. THE MORPHOLOGICAL CHARACTERISTICS OF THE PRIMARY MANDIBULAR FIRST MOLARS AND THEIR ROOT CANALS ON CONE-BEAM COMPUTED TOMOGRAPHY IMAGES AT THE NATINONAL HOSPITAL OF ODONTO -STOMATOLOGY, HANOI. VMJ. 2026;561(2). doi:10.51298/vmj.v561i2.18270