KARTIKA, D. .; PUTRI, R. A. . The Root Length Of Mandibular Second Molar By Using Periapical Radiography On Batak Ethnics Aged 18-22 Years In Faculty Of Dentistry University Of Sumatera Utara. IIUM Medical Journal Malaysia, [S. l.], v. 16, n. 2, 2017. DOI: 10.31436/imjm.v16i2.1118. Disponível em: https://journals.iium.edu.my/kom/index.php/imjm/article/view/1118. Acesso em: 21 jan. 2022.