Supported by The Health Discipline Construction Project in Pudong New Area,No.PWYts2021-20.
BACKGROUND Root canal variations frequently occur in maxillary first molars,which greatly affects the success of its treatment.The second mesiobuccal(MB)root canal is the most common root canal variation.However,only ...
Intracanal instrument fracture is an unpredictable and problematic occurrence that can prevent adequatecleaning and shaping procedures and influence the prognosis of endodontic treatment. The prevalence of instrument ...