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Published on: August 22, 2022
[Analysis of canal morphology of mandibular first premolar]
Qian Liao1, Jun-li Han, Xiao Xu
1Department of General Dentistry, Shanghai Jiaotong University School of Medicine, Shanghai, China. liaoqian@eastday.com
Purpose:
To investigate the canal morphology of bilateral mandibular first premolar using cone-beam CT(CBCT).
Methods:
Ninety-seven CBCT images of bilateral mandibular first premolar were selected . The images were analyzed with NNT software for the number and morphology of canal, groove, position of bifurcation and symmetry of bilateral canal classification.
Results:
The canal configuration of mandibular first premolar was type I:83.5%, type III:3.6%, type v:8.8% and C-shaped canal:4.1% by Vertucci's classification.The incidence of groove in complicated canal (75%)was obviously higher than single canal (3.7%). 56.3% of complicated canal bifurcated in middle third, and 31.3% in apical third. 93.8% of mandibular first premolar had bilateral canal symmetry, the symmetry rate of single canal(95.2%) was higher than complicated canal (66.7%).
Conclusions:
CBCT can provide accurate information of canal system, the canal anatomy of mandibular first premolar is complex.
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