CBCT observation of aging changes in the root canal morphology of maxillary first permanent premolars in Han population in Jiangsu province
CHEN Bai-tong
HAN Jian-guo
WANG Peng-lai
LIU Bin
Abstract：AIM:To investigate the morphology and the root canal system of maxillary first premolars in dif-ferent age groups by cone-beam computed tomography ( CBCT) . METHODS:200 human maxillary first permanent premolars were included. The subjects were divided into A, B, C, D and E groups (n=40) by the age(years) of 14~16, 24~26, 34~36 ,44~46 and 54~56 respectively. The canals of the maxillary first premolars were examined by CBCT and analysed by Vertucci root canal classification. RESULTS:In group A 19. 5% (39/200) of the canals was type I (1 -1), in group B 30. 5% (61/200) type Ⅱ (2 -1), in group C 13. 5% (27/200) type Ⅲ(1-2-1), in group C 30. 5% (61/200) type Ⅳ (2 -2), in group D 4. 5% (9/200) type Ⅴ (1 -2) and in group E 1. 5% (3/200) typeⅦ(1-2-1-2) . Chi-square test showed that the root canal types were significantly different among different age groups(P<0. 05). CONCLUSION: With the aging process, the morphology and the root canal system of the maxillary first premolars become more complex.
Keywords：CBCTmaxillary first permanent premolarsroot canal morphologychanges of aging
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 501-504 )