Study on root number and root canal morphology in maxillary third molars by cone-beam computed tomography / 重庆医学

ABSTRACT

Objective To use the cone-beam computed tomography(CBCT) to analyze the root number and root canal morphology of maxillary third molars in Luzhou area.Methods A total of 321 maxillary third molars in 200 outpatients in the stomatological hospital of Southwest Medical University from September 2016 to February 2017 were collected.The age,gender,root number,canal morphology and CBCT imaging data were recorded.The difference in root number of maxillary third molars between left and right sides and between genders were analyzed.Results In included 321 maxillary third molars,the root number was mainly fused root teeth(56.70％),followed by three roots teeth(26.48％);the number of root canal was mainly three root canals (38.94 ％),followed by single root canal(30.84 ％).According to the Vertucci root canal classification,65.73 ％ of root canals were type Ⅰ and 10.60％ were type Ⅴ.There was no statistical differences between left and right sides(P＞0.05),wherease there was statistically difference between genders(P＜0.05).Conclusion The root number of maxillary third molars is variable,the root canal morphology has large variability and the root canal system is complex.