Cone -beam computed tomography study of root canal morphology of mandibular premolars
DAI De-hua
CHEN Jun-xia
WEI Wei
HE Guo-quan
Abstract：AIM:To investigate the root canal morphology of mandibular premolars by cone -beam computed tomography(CBCT).METHODS:The mandibular premolars of 560 subjects were examined by CBCT.Details of the name,gender,age,tooth position,number of roots and root canals were observed and recorded.Meanwhile,the root ca-nal configuration was categorized according to the Vertucci's criteria.RESULTS:①84.2% of the mandibular first pre-molars had single root and 3.8% had double roots;85.2% had 1 canal,12.7% had 2 canals and 2.0% had C-shaped canals.The most common type of canal configuration in mandibular first premolar was Type I(85.2%),followed by Type V(9.7%).Women had a higher incidence of Type I mandibular first premolars than men (P <0.05),and men had a higher incidence of Type V and C-shaped root canals in mandibular first premolars than women (P <0.05).②99.8%of the mandibular second premolars had 1 root,99.5% of which were of Type I.The prevalence of double and C -shaped root canals was 0.4% and 0.1% respectively.CONCLUSION:Mandibular first premolars have a high preva-lence of canal variation.Mandibular second premolars commonly have 1 root and 1 canal.
Keywords：mandibular premolarroot canal morphologycone-beam computed tomography(CBCT)
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 301-305 )