13～23岁下颌第二前磨牙单根管锥度的初步研究

潘莉章润贞李颂

An in vitro study on taper of single root canal of mandibular second premolars of 13-23 year-old people

PAN Li, ZHANG Run-zhen, LI Song

华西口腔医学杂志 . 2010, (02): 162 -165 . DOI: 10.3969/j.issn.1000-1182.2010.02.012