Journal of Oral Science Research
Variation of Root Canals in Maxillary Second Molar: A Case Report
ZHANG Mei, NI Can, REN Shuang-shuang, LI Wen, YU Yi-jun, MIAO Lei-ying
Journal of Oral Science Research . 2017, (11): 1226 -1227 .  DOI: 10.13701/j.cnki.kqyxyj.2017.11.023