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CBCT study of mandibular first molars with a distolingual root in Koreans.
Restor Dent Endod 2018; 43(3):e33RD

Abstract

Objectives

This study aimed to investigate the prevalence of a separate distolingual root and to measure the thickness of the buccal cortical bone in mandibular first molars in Koreans using cone-beam computed tomography (CBCT) images.

Materials and Methods

High-quality CBCT data from 432 patients were analyzed in this study. The prevalence of a separate distolingual root of the mandibular first molar was investigated. The distance from the distobuccal and distolingual root apices to the outer surface of the buccal cortical bone was measured. We also evaluated the thickness of the buccal cortical bone.

Results

The prevalence of a separate distolingual root (2 separate distal roots with 1 canal in each root; 2R2C) was 23.26%. In mandibular first molars with 2R2C, the distance from the distobuccal root apex to the outer surface of the buccal cortical bone was 5.51 mm. Furthermore, the distance from the distolingual root apex to the outer surface of the buccal cortical bone was 12.09 mm. In mandibular first molars with 2R2C morphology, the thickness of the buccal cortical bone at the distobuccal root apex of the mandibular first molar was 3.30 mm. The buccal cortical bone at the distobuccal root apex was significantly thicker in the right side (3.38 mm) than the left side (3.09 mm) (p < 0.05).

Conclusions

A separate distolingual root is not rare in mandibular first molars in the Korean population. Anatomic and morphologic knowledge of the mandibular first molar can be useful in treatment planning, including surgical endodontic treatment.

Links

  • PMC Free PDF
    • Publisher Full Text
    ncbi.nlm.nih.gov
    rde.ac

    Authors+Show Affiliations

    Kim HH
    Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.
    Jo HH
    Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.
    Min JB
    Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.
    Hwang HK
    Department of Conservative Dentistry, Chosun University School of Dentistry, Gwangju, Korea.

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    30135852

    Citation

    Kim, Hee-Ho, et al. "CBCT Study of Mandibular First Molars With a Distolingual Root in Koreans." Restorative Dentistry & Endodontics, vol. 43, no. 3, 2018, pp. e33.
    Kim HH, Jo HH, Min JB, et al. CBCT study of mandibular first molars with a distolingual root in Koreans. Restor Dent Endod. 2018;43(3):e33.
    Kim, H. H., Jo, H. H., Min, J. B., & Hwang, H. K. (2018). CBCT study of mandibular first molars with a distolingual root in Koreans. Restorative Dentistry & Endodontics, 43(3), pp. e33. doi:10.5395/rde.2018.43.e33.
    Kim HH, et al. CBCT Study of Mandibular First Molars With a Distolingual Root in Koreans. Restor Dent Endod. 2018;43(3):e33. PubMed PMID: 30135852.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - CBCT study of mandibular first molars with a distolingual root in Koreans. AU - Kim,Hee-Ho, AU - Jo,Hyoung-Hoon, AU - Min,Jeong-Bum, AU - Hwang,Ho-Keel, Y1 - 2018/07/30/ PY - 2018/02/12/received PY - 2018/04/09/accepted PY - 2018/8/24/entrez PY - 2018/8/24/pubmed PY - 2018/8/24/medline KW - Cone-beam computed tomography KW - Cortical bone KW - Korean KW - Mandibular KW - Root SP - e33 EP - e33 JF - Restorative dentistry & endodontics JO - Restor Dent Endod VL - 43 IS - 3 N2 - Objectives: This study aimed to investigate the prevalence of a separate distolingual root and to measure the thickness of the buccal cortical bone in mandibular first molars in Koreans using cone-beam computed tomography (CBCT) images. Materials and Methods: High-quality CBCT data from 432 patients were analyzed in this study. The prevalence of a separate distolingual root of the mandibular first molar was investigated. The distance from the distobuccal and distolingual root apices to the outer surface of the buccal cortical bone was measured. We also evaluated the thickness of the buccal cortical bone. Results: The prevalence of a separate distolingual root (2 separate distal roots with 1 canal in each root; 2R2C) was 23.26%. In mandibular first molars with 2R2C, the distance from the distobuccal root apex to the outer surface of the buccal cortical bone was 5.51 mm. Furthermore, the distance from the distolingual root apex to the outer surface of the buccal cortical bone was 12.09 mm. In mandibular first molars with 2R2C morphology, the thickness of the buccal cortical bone at the distobuccal root apex of the mandibular first molar was 3.30 mm. The buccal cortical bone at the distobuccal root apex was significantly thicker in the right side (3.38 mm) than the left side (3.09 mm) (p < 0.05). Conclusions: A separate distolingual root is not rare in mandibular first molars in the Korean population. Anatomic and morphologic knowledge of the mandibular first molar can be useful in treatment planning, including surgical endodontic treatment. SN - 2234-7658 UR - https://www.unboundmedicine.com/medline/citation/30135852/CBCT_study_of_mandibular_first_molars_with_a_distolingual_root_in_Koreans_ L2 - https://rde.ac/DOIx.php?id=10.5395/rde.2018.43.e33 DB - PRIME DP - Unbound Medicine ER -