The effect of curvature of simulated root canal and location of fragment on removal of broken file from simulated root canal
FU Mei1, HOU Ben-xiang1, ZHANG Zhi-ling2.
West China Journal of Stomatology . 2010, (06): 607 -610 .  DOI: 10.3969/j.issn.1000-1182.2010.06.009