Analysis of canal morphology of mandibular first premolar
Liao, Q.; Han, J.-l.; Xu, X.
Shanghai Kou Qiang Yi Xue 20(5): 517-521
2011
ISSN/ISBN: 1006-7248 PMID: 22109371 Document Number: 650247
To investigate the canal morphology of bilateral mandibular first premolar using cone-beam CT(CBCT). 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. 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%). CBCT can provide accurate information of canal system, the canal anatomy of mandibular first premolar is complex.