Evaluation of roots and canal systems of mandibular first molars in a vietnamese subpopulation using cone-beam computed tomography

Abstract

Objectives: The aim of this study is to determine the prevalence of the first lower molars that have two roots or three roots and the number of the root canals of the mandibular first molars in the Vietnamese subpopulation using cone-beam computed tomography (CBCT). Materials and Methods: The study was conducted on 166 patients who had CBCT as indicated by dentists in Nguyen Trai Dental CT Center, Ho Chi Minh City using the Picasso Trio (Ewoo Vatech, Korea). The number of root canals of the first lower molars was examined by moving cross-sectional slices from the pulpal floor to the apex. The orifices, middle thirds, and apical thirds of the canals of the first lower molar were observed, and the root canals of each root of the mandibular first molars were observed in three planes. Results: The prevalence of two, three, and four root canals of the mandibular first molars was 4.5%, 66.8%, and 28.9%, respectively. For the distal roots of these molars, a classification of Vertucci type I was the most common at a rate of 80.8%–97.6%. Whenever these teeth had three roots, a Vertucci type I was the classification of 100% of distolingual roots. Conclusion: Majority of the mandibular first molars has two roots and three canals. CBCT is appropriate equipment useful in investigating the complex root canal morphology of human teeth.

Endodontic length measurements using 3D Endo, cone-beam computed tomography, and electronic apex locator

“…With the advance of technology in production of more and more modern root canal instruments [ 16 , 17 ], and the complexity of the root canal morphology [ 18 ], the more important role of the endodontic length determination is.…”

Endodontic length measurements using cone beam computed tomography with dedicated or conventional software at different voxel sizes

“…The important role of the working length determination had never diminished, especially in the existing of more and more modern effective instruments for preparation 17 , 18 , the complexity of the root canal system 19 . There was fixed bias between the ProPex Pixi and the AL measurements with the means of the EAL measurements were constantly lower than the latter, across the entire range of measurements.…”

Endodontic length measurements using different modalities: An in vitro study

“…The important role of the WL determination had never diminished especially in the existing of more and more modern effective instruments for preparation,[ 13 14 ] the complexity of the root canal system,[ 15 ] and the demand for restoration of endodontically treated teeth. [ 16 ] The WL obtained by the E-Pex Pro in this study did not differ from that of the previous study, with the highest accuracy in the range of ±0.5 mm and disagreement with the AL.…”