Aws Hashim Ali Al-Kadhim2024-05-282024-05-282015--2369-4475https://scientonline.org/open-access/a-case-of-mandibular-second-molar-with-four-canals.pdfhttps://oarep.usim.edu.my/handle/123456789/4761Volume 1 • Issue 1 , 2015Success in root canal treatment is dependent on thorough cleaning, shaping and complete obturation of root canal system. It fundamental that such a procedure be performed in root canal systems that do not comply with the normal anatomical features described in standard textbooks. This article describes the conventional root canal treatment on an unusual mandibular second molar with four root-canals.en-USAnatomy,Endodontics,Root canal filling,Root canal systemArticle1311