White Castle Dental Clinic dentist Martik Hartoonian launched a series of lectures on endodontics, which is one of the most complicated procedures aimed to preserve the teeth. As a rule, tooth extraction comes as result of wrong root canal treatment. Doctor Hartoonian focused on the check up to be done and the proper choice of equipment and instruments used in endodontics, as well as screened a video on the importance of appropriate file usage for different clinical cases and replied to students’ questions.