1Gani O,Visvisian C.Apical canal diameter in the first upper molar at various ages[J].Endod,1999,25(10):689-691.
2Wu MK,R'oris A,Barkis D,et al.Prevalence and extent of long oval canals in the apical third[J].Oral Surg Oral Med Oral Pathol Oral Radiol Endod,2000,89(6):739-743.
5Mauger MJ,Schindler WG,Walker WA 3rd.An evaluation of canal morphology at different levels of root resection in mandibular incisors[J].Endod,1998,24(9):607-609.
6Wu MK,Wesselink PR.A primary observation on the preparation and obturation of oval canals[J].Int Endod,2001,34(2):137-141.
7Wu MK,van der Sluis LW,Wesselink PR.The capability of two hand instrumentation techniques to remove the inner layer of dentine in oval canals[J].Int Endod,2003,36(3):218-224.
8Weiger R,ElAyouti A,Lost C.Efficiency of hand and rotary instruments in shaping oval root canals[J].Endod,2002,28(8):580-583.
9Zmener O,Pameijer CH,Banegas G.Effectiveness in cleaning oval-shaped root canals using Anatomic Endodontic Technology,ProFile and manual instrumentation:a scanning electron microscopic study[J].Int Endod J,2005,38(6):356-363.
10Rodig T,Hulsmann M,Muhge M,et al.Quality of preparation of oval distal root canals in mandibular molars using nickel-titanium instruments[J].Int Endod,2002,35(11):919-928.
7Friedman S,Lustmann J,Shaharabany V.Treatment results of apical surgery in premolar and molar teeth[J].J Endod,1991;17(1):30 -33
8Kum KY,Kazemi RB,Cha BY,et al.Smear layer production of K3 and ProFile Ni-Ti rotary instruments in curved root canals:a comparative SEM study[J].Oral Surg,2006,101(4):536 -541
9Peters OA,Barbakow F.Effects of irrigation on debris and smear layer on canal walls prepared by two rotary techniques:a scanning electron microscopic study[J].J Endod,2000,26(1):6-10
10Fukumoto Y,Kikuchi I,Yoshioka T,et al.An ex vivo evaluation of a new root canal irrigation technique with intracanal aspiration[J].Int Endod J,2006,39(2):93 -99
