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Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a korean population: variations in the number of roots and canals and the incidence of fusion.
J Endod 2012; 38(8):1063-8JE

Abstract

INTRODUCTION

The aim of this study was to identify the root and canal morphology of the maxillary first and second molars in a Korean population by analyzing cone-beam computed tomography (CBCT) images.

METHODS

Maxillary first (n = 814) and second (n = 821) molars from Korean patients (n = 415) of Mongoloid origin were examined by using in vivo CBCT methods. The number and configuration of roots, the number of root canals, and the canal configuration according to Vertucci's classification were determined.

RESULTS

Single roots were found in 0.25% of the first molars and 4.63% of the second molars. The incidence of fused roots was 0.73% in the first molars and 10.71% in the second molars. In 802 3-rooted maxillary first molars, additional canals were found in 63.59% of the mesiobuccal (MB) roots and 1.25% of the distobuccal (DB) roots. In 660 3- or 4-rooted maxillary second molars, additional canals were found in 34.39% of the MB roots, 0.30% of the midbuccal roots, 0.30% of the DB roots, and 1.82% of the palatal roots. Bilateral symmetry of the MB roots was found in 88.10% of the first molars and 82.07% of the second molars.

CONCLUSIONS

The root and canal configuration of a Korean population showed different features from those of other populations. We report the incidence of rare morphologic variations, a single root and 3 buccal roots, that have not been described except for in case reports. CBCT scans can enhance the understanding of root canal anatomy, with the potential of improving the outcome of endodontic treatment.

Authors+Show Affiliations

Department of Conservative Dentistry, Dental Research Institute, Ewha Womans University School of Medicine, Seoul, Korea. yemis@hanmail.netNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22794206

Citation

Kim, Yemi, et al. "Morphology of Maxillary First and Second Molars Analyzed By Cone-beam Computed Tomography in a Korean Population: Variations in the Number of Roots and Canals and the Incidence of Fusion." Journal of Endodontics, vol. 38, no. 8, 2012, pp. 1063-8.
Kim Y, Lee SJ, Woo J. Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a korean population: variations in the number of roots and canals and the incidence of fusion. J Endod. 2012;38(8):1063-8.
Kim, Y., Lee, S. J., & Woo, J. (2012). Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a korean population: variations in the number of roots and canals and the incidence of fusion. Journal of Endodontics, 38(8), pp. 1063-8. doi:10.1016/j.joen.2012.04.025.
Kim Y, Lee SJ, Woo J. Morphology of Maxillary First and Second Molars Analyzed By Cone-beam Computed Tomography in a Korean Population: Variations in the Number of Roots and Canals and the Incidence of Fusion. J Endod. 2012;38(8):1063-8. PubMed PMID: 22794206.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Morphology of maxillary first and second molars analyzed by cone-beam computed tomography in a korean population: variations in the number of roots and canals and the incidence of fusion. AU - Kim,Yemi, AU - Lee,Seung-Jong, AU - Woo,Jein, Y1 - 2012/06/20/ PY - 2012/01/18/received PY - 2012/04/10/revised PY - 2012/04/24/accepted PY - 2012/7/17/entrez PY - 2012/7/17/pubmed PY - 2013/2/13/medline SP - 1063 EP - 8 JF - Journal of endodontics JO - J Endod VL - 38 IS - 8 N2 - INTRODUCTION: The aim of this study was to identify the root and canal morphology of the maxillary first and second molars in a Korean population by analyzing cone-beam computed tomography (CBCT) images. METHODS: Maxillary first (n = 814) and second (n = 821) molars from Korean patients (n = 415) of Mongoloid origin were examined by using in vivo CBCT methods. The number and configuration of roots, the number of root canals, and the canal configuration according to Vertucci's classification were determined. RESULTS: Single roots were found in 0.25% of the first molars and 4.63% of the second molars. The incidence of fused roots was 0.73% in the first molars and 10.71% in the second molars. In 802 3-rooted maxillary first molars, additional canals were found in 63.59% of the mesiobuccal (MB) roots and 1.25% of the distobuccal (DB) roots. In 660 3- or 4-rooted maxillary second molars, additional canals were found in 34.39% of the MB roots, 0.30% of the midbuccal roots, 0.30% of the DB roots, and 1.82% of the palatal roots. Bilateral symmetry of the MB roots was found in 88.10% of the first molars and 82.07% of the second molars. CONCLUSIONS: The root and canal configuration of a Korean population showed different features from those of other populations. We report the incidence of rare morphologic variations, a single root and 3 buccal roots, that have not been described except for in case reports. CBCT scans can enhance the understanding of root canal anatomy, with the potential of improving the outcome of endodontic treatment. SN - 1878-3554 UR - https://www.unboundmedicine.com/medline/citation/22794206/Morphology_of_maxillary_first_and_second_molars_analyzed_by_cone_beam_computed_tomography_in_a_korean_population:_variations_in_the_number_of_roots_and_canals_and_the_incidence_of_fusion_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0099-2399(12)00421-9 DB - PRIME DP - Unbound Medicine ER -