[Association of root canal therapy difficulty with canal anatomic factors in mandibular permanent incisors].
OBJECTIVE
To investigate the association of root canal therapy difficulty with canal anatomic factors in Chinese mandibular permanent incisors.


METHODS
Two hundred and ninety nine Chinese permanent incisors were included in this study. The following anatomic items of the root canal were observed: Root canal length, number of root canal, morphology, curvature, and calcification of pulp chamber and root canal. Based on the root canal therapy evaluation criteria, the root canal therapy difficult scores were assessed. The association of root canal therapy difficulty with canal anatomic factors was analyzed with logistic regression analysis.


RESULTS
The root canal therapy difficulty grade I, grade II and grade Ill in Chinese mandibular permanent incisors were 29.4%, 20.1% and 50.5%, respectively. The root canal therapy difficulty was significantly associated with the root canal length, number, calcification, and curvature (P < 0.005).


CONCLUSIONS
The root canal therapy difficulty in Chinese mandibular permanent incisor is significantly with root canal anatomy.
Huang
Ding-Mmin
DM
Key Laboratory of Oral Biomedical Engineering, Ministry of Education, Sichuan University, Chengdu 610041, China.
Gao
Xiao-Jie
XJ
Tan
Hong
H
Zhou
Xue-Dong
XD
D003786:Dental Pulp Cavity; D006801:Humans; D007180:Incisor; D008334:Mandible; D012390:Root Canal Therapy