Ex Vivo Evaluation of the Root Form and Root Canal Morphology of the Mandibular First Molar Us ing CBCT Technology

authors:

avatar Eshagh Ali Saberi 1 , avatar Narges Farhad-Mollashahi 1 , * , avatar Mahdi Niknami 2 , avatar Elnaz Mousavi 3 , avatar Hossein Rasuli 4

Department of Dentistry, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Tehran Medical University, , Tehran, Iran
Post Graduate of Endodontics, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran
Department of Endodontics, Faculty of Dentistry, Ilam Medical University, Ilam, Iran
Zahedan Journal of Research in Medical Sciences: Vol.16, issue 7
published online: June 03, 2013
article type: Research Article
received: February 08, 2012
accepted: March 07, 2012

how to cite: Ali Saberi E, Farhad-Mollashahi N , Niknami M, Mousavi E, Rasuli H. Ex Vivo Evaluation of the Root Form and Root Canal Morphology of the Mandibular First Molar Us ing CBCT Technology. Zahedan J Res Med Sci. 2014;16(7): -. 

Abstract

Background: This study aims to evaluate the root canal system and its curvature and the relationship between the root concavity and the dentin thickness of danger zone in the mandibular first molar using the cone beam CT method.
Materials and Methods: A sum of 101 fresh extracted mandibular first molar were gathered and scanned by CBCT (planmeca romexis 3D) machine. The root canal configuration was evaluated according to Vertucci’s classification. Then, the canal curvature was evaluated according to schneider's method in clinical and proximal views. Finally, the relationship between the root concavity and the dentin thickness of danger zone was evaluated using the Pearson correlation coefficient.
Results: The most common canal configuration of the mesial roots was vertucci type IV (49.5%), followed by type II (46.5%). Root canal configuration of the distal root revealed type I in 50.5% and type II in 29.7%. The average angles in proximal dimension for MB, ML, DB and DL canals were 18.80, 18.77, 8.22 and 16.86, respectively. These values in clinical dimension were 22.50, 21.90, 13.83 and 12.04, respectively. No meaningful relationship was found between the dentin thickness and the root concavity of danger zone.
Conclusion: The clinician's awareness of the anatomy of the root canal system and the canal curvatures and the internal and external anatomy of the root is helpful and necessary in diagnosis and treatment of the endodontic cases.

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