In vitro study on the curvatures of root canal of maxillary first premolars among adolescents in Guangdong
province
Zeng Sujuan1, Hu Yan2, Wang Xiaoyan1, Cai Xiaoling1, Wang Liping1
West China Journal of Stomatology . 2012, (3): 287 -291 .  DOI: 10.3969/j.issn.1000-1182.2012.03.016

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