1Zhang R,Yang H,Yu X,et al.Use of CBCT to identify the morphology of maxillary permanent molar teeth in a Chinesesubpopulation[J].Int endod J,2011,44(2):162-9.
2Ng YL,Aung TH,Alavi A,et al.Root and canal morphology of Burmese maxillary molars[J].Int Endod J,2001,34(8):620-630.
6Vertucci FJ. Root canal anatomy of the human permanent teeth [J]. Oral Surg Oral Med Oral Pathol, 1984, 58(5):589-599.
7Ng YL, Aung TH, Alavi A, et el. Root and cartel morphology of Burmese maxillary molars[J]. Int Endod J, 2001, 34 (8):620-630.
8Gorduysus MO, Gorduysus M, Friedman S. Operating microscope improves negotiation of second mesiobuccal canals in maxillary molars[J]. J Endod, 2001, 27(11):683-686.
9Weller RN, Hartwell GR. The impact of improved access and searching techniques on detection of the mesiolingual canal in maxillary molars[J]. J Endod, 1989, 15 (2) : 82-83.
10Fahid A, Taintor JF. Maxillary second molar with three buccal roots[J]. JEndod, 1988, 14(4) :181 -183.