LATERAL CANALS AND ISTHMUSES IN THE APICAL PART OF ROOT CANALS OF ENDODONTICALLY TREATED LOWER FIRST MOLARS IN MOSCOW POPULATION: CBCT STUDY ArticleKhabadze Zurab, Blokhina Anastasiya, Mustafaeva Rita, Abdulkerimova Saida, Mordanov OlegНаука в современном информационном обществе. 2018. С. 13-16