5Katz A, Mass E, Kaufman AY. Electrinic apex Ioeator. a useful tool for root canal treatment in the primary dentition. ASDC J Dent Child, 1996,63(6) :414.
6黄力子,中华口腔医学杂志,1988年,23卷,5期,297页
7赵皿,实用口腔医学杂志,1987年,3卷,1期,30页
8Pratten Don H. , McDonald NJ. Comparison of Radiographic And Electronic Working Lengths. J Endodon, 1996,22(4): 173~176.
9Kovacevic M. , Tamarut T. Inffuence of the concentration of Ions And Foramen Diameter on the Accuracy of Electronic Root Canal Length Measurement-an Experimental Study, J Endodon, 1998,24(5):346~351.
10Pilot TF. , Pitts DL. Detemination of Impedance Changes at Varying Frequencies in Relation to Root Canal File Position and Irrigant. J Endodon, 1997,23(12) :719~724.