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《Beijing Journal of Stomatology》 2009-02
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Clinical study of the root canals number of maxillary second molars

LIU Rong-fang,FENG Chao-hua.Department of Endodontics,the First Stomatology Clinic,Peking University School of Stomatology,Beijing 100034,China  
Objective To investigate the clinical root canals number of maxillary second molars.MethodsUnder the dental operating microscope,the root canals of 166 maxillary second molars were examined with ultrasonic instrument、small size K file and 17%EDTA.The canals of all cases were instrumented by GG burs and NiTi instrument and the canals obturated by lateral condensation technique.Results Of the 166 maxillary second molars,two teeth had only one root canal(1.2%);five teeth had two root canals(3.0%);117 teeth had three root canals(70.5%);and 42 teeth had four root canals(25.3%).Second mesiobuccal canal(MB2)was found in 23.5% of the cases.Conclusion The root canals of maxillary second molars have more variations and more attention should be paied in clinic.
【CateGory Index】: R781.05
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