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A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulation.
PLoS One 2015; 10(8):e0134919Plos

Abstract

The purpose of this study was to conduct a cone-beam computed tomographic (CBCT) investigation on the root and canal configuration of the mandibular first molars, especially the morphology of the disto-lingual (DL) root, in a Chinese subpopulation. A total of 910 CBCT images of the mandibular first molars were collected from 455 patients who underwent CBCT examinations as a preoperative assessment for implants or orthodontic treatment. The following information was analyzed and evaluated: tooth position, gender, root and root canal number per tooth, root canal type of the mesial root(s) and distal root(s), angle of the DL root canal curvature, distance between two distal canal orifices in the teeth with DL root, and angle of disto-buccal canal orifice-disto-lingual canal orifice-mesio-lingual canal orifice (DB-DL-ML). Most of the mandibular first molars (64.9%, n = 591) had two roots with three root canals, and most of the mesial root canals (87.7%, n = 798) were type VI. The prevalence of the DL root was 22.1% (n = 201). The right side had a higher prevalence of DL root than the left side (p<0.05). Additionally, the curvature of the DL root canal were greater in the bucco-lingual (BL) orientation (30.10°±14.02°) than in the mesio-distal (MD) orientation (14.03°± 8.56°) (p<0.05). Overall there was a high prevalence of DL root in the mandibular first molars, and most of the DL roots were curved in different degrees. This study provided detailed information about the root canal morphology of the mandibular first molars in a Chinese subpopulation.

Authors+Show Affiliations

VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.Department of Endodontics, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.VIP Center and Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shangdong, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26241480

Citation

Zhang, Xin, et al. "A Cone-Beam Computed Tomographic Study On Mandibular First Molars in a Chinese Subpopulation." PloS One, vol. 10, no. 8, 2015, pp. e0134919.
Zhang X, Xiong S, Ma Y, et al. A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulation. PLoS ONE. 2015;10(8):e0134919.
Zhang, X., Xiong, S., Ma, Y., Han, T., Chen, X., Wan, F., ... Wang, Y. (2015). A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulation. PloS One, 10(8), pp. e0134919. doi:10.1371/journal.pone.0134919.
Zhang X, et al. A Cone-Beam Computed Tomographic Study On Mandibular First Molars in a Chinese Subpopulation. PLoS ONE. 2015;10(8):e0134919. PubMed PMID: 26241480.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulation. AU - Zhang,Xin, AU - Xiong,Shijiang, AU - Ma,Yue, AU - Han,Ting, AU - Chen,Xinyu, AU - Wan,Fang, AU - Lu,Yating, AU - Yan,Songhe, AU - Wang,Yan, Y1 - 2015/08/04/ PY - 2015/01/07/received PY - 2015/07/15/accepted PY - 2015/8/5/entrez PY - 2015/8/5/pubmed PY - 2016/5/18/medline SP - e0134919 EP - e0134919 JF - PloS one JO - PLoS ONE VL - 10 IS - 8 N2 - The purpose of this study was to conduct a cone-beam computed tomographic (CBCT) investigation on the root and canal configuration of the mandibular first molars, especially the morphology of the disto-lingual (DL) root, in a Chinese subpopulation. A total of 910 CBCT images of the mandibular first molars were collected from 455 patients who underwent CBCT examinations as a preoperative assessment for implants or orthodontic treatment. The following information was analyzed and evaluated: tooth position, gender, root and root canal number per tooth, root canal type of the mesial root(s) and distal root(s), angle of the DL root canal curvature, distance between two distal canal orifices in the teeth with DL root, and angle of disto-buccal canal orifice-disto-lingual canal orifice-mesio-lingual canal orifice (DB-DL-ML). Most of the mandibular first molars (64.9%, n = 591) had two roots with three root canals, and most of the mesial root canals (87.7%, n = 798) were type VI. The prevalence of the DL root was 22.1% (n = 201). The right side had a higher prevalence of DL root than the left side (p<0.05). Additionally, the curvature of the DL root canal were greater in the bucco-lingual (BL) orientation (30.10°±14.02°) than in the mesio-distal (MD) orientation (14.03°± 8.56°) (p<0.05). Overall there was a high prevalence of DL root in the mandibular first molars, and most of the DL roots were curved in different degrees. This study provided detailed information about the root canal morphology of the mandibular first molars in a Chinese subpopulation. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/26241480/A_Cone_Beam_Computed_Tomographic_Study_on_Mandibular_First_Molars_in_a_Chinese_Subpopulation_ L2 - http://dx.plos.org/10.1371/journal.pone.0134919 DB - PRIME DP - Unbound Medicine ER -