2PranenDonH,McDonaldNJ.Comparisonof Radiographic and Electronicworking Lengths[J].J Endodon,1996,22 (4):173.
3黄力子.根管长度电测法及原理[J].中华口腔医学杂志,1988,23(5):297-297.
4KovacevlcM,TamarutT.Influence of the concentration otions and foramen diameter on the accuracy of electronic root canal length measurement an experimental study[J].J Endodon,1998,24(25):346.
5Pilot TF,Pius KL.Peter ruination of lmpedance changes at varying frequenmes in relation to root canl file position and rrigant[J].J Endodon,1997,23(12):719.
6Kobayashic,Suda H.New electronic canal measurmg device based on the ratio method[J].J Endodn,1994,20(3):111.
7Ricardo,Rou X D,Bourdeaul,et al.Clinical valuation of the accuracy of the evident RcM mark Ⅱ apex locator[J].J Endodon,1991,17(11):567.
8Fouad AF,Krellkv,Mekendry DJ.et al.Aclinical evaluation of five electromc root canal length measuring lns t rument[J].J Endodon,1990,16(8):446.
9Lauper R,Lutz F,Barba kow F.An in vivo comparison of gradient and absolute lmpedance electromc apex locators[J].J Endodons,1996,22(5):260.
10Frank AL,Torabinejad M.An Tn vivo evaluation of Endex Electronic Apex locator[J].J Endodon,1993,19(4):177.