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

Eshagh Ali Saberi; Narges  Farhad-Mollashahi; Mahdi Niknami; Elnaz Mousavi; Hossein Rasuli

Zahedan Journal of Research in Medical Sciences

The Official Journal of Zahedan University of Medical Sciences

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

Author(s):

Eshagh Ali Saberi¹,

Narges Farhad-Mollashahi^1,*,

Mahdi Niknami²,

Elnaz Mousavi³,

Hossein Rasuli⁴

1Department of Dentistry, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran

2Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Tehran Medical University, , Tehran, Iran

3Post Graduate of Endodontics, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran

4Department of Endodontics, Faculty of Dentistry, Ilam Medical University, Ilam, Iran

Zahedan Journal of Research in Medical Sciences:Vol. 16, issue 7

Published online:Jun 03, 2013

Article type:Research Article

Received:Feb 08, 2012

Accepted:Mar 07, 2012

How to Cite:Eshagh Ali SaberiNarges Farhad-MollashahiMahdi NiknamiElnaz Mousavi Hossein RasuliEx Vivo Evaluation of the Root Form and Root Canal Morphology of the Mandibular First Molar Us ing CBCT Technology.Zahedan J Res Med Sci.16(7):null-null.

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.

Keywords

Cone Beam CT

Canal Curvature

Danger Zone

Mandibular First Molar

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