1Ponce de Leon Del Bello T,Wang N,Roane JB.Crown-down tip design and shaping[J].J Endod.2003,29(8):513-518.
2Weine FS,Hayami S,Hata G,et al.Canal configuration of the mesiobuccal root of the maxillary first molar of a Japanese sub-population[J].J Int Endod,1999,32 (2):79-87.
3Wolcott J,Ishley D,Kennedy W,et al.Clinical investigation of second mesiobuccal canals in endodontically treated and retreated maxillary molars[J].J Endod,2002,28 (6):477-479.
4Stropko JJ.Canal morphology of maxillary molars:clinical observation of canal configurations[J].J Endod,1999,25 (6):446-450.
5Sempira HN,Hartwell GR.Frequency of second messiobuccal canals in maxillary molars as determinded by use of an operating microscope:a clinical study[J].J Endod,2000,26 (11):673-674.
6Yoshika T,Kikuchi I,Fukumoto Y,et al.Detection of the second mesiobuccal canal in misiobuccal roots of maxillary molar teeth ex vivo[J].J Int Endod,2005,38 (2):124-128.
8Rwenyonyi CM, Kutesa AM, Muwazi LM, et al. Root and canal morphology of maxillary first and second permanent molar teeth in a Ugandan population[J]. Int Endod J, 2007, 40 (9) : 679-683.
9Reuben J, Velmurugan N, Kandaswamy D. The evaluation of root canal morphology of the mandibular fast molar in an Indian population using spiral eomputed tomography scan: An in vitro study[J]. J Endod, 2008, 34(2): 212-215.
10Oi T, Saka H, Ide Y. Three-dimensional observation of pulp cavities in the maxiUary first premolar tooth using micro-CT[J]. Int Endod J, 2004, 37(1):45-51.
