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Cone-beam computed tomography study of incidence of distolingual root and distance from distolingual canal to buccal cortical bone of mandibular first molars in a Korean population.
J Endod 2012; 38(3):301-4JE

Abstract

INTRODUCTION

The purpose of this study was to investigate the incidence of separate distolingual (DL) root and separate DL canal in 1 distal root and to measure the distance from distobuccal (DB) and DL canal to buccal cortical bone of mandibular first molars in a Korean population by using cone-beam computed tomography images.

METHODS

Screening identified 1400 subjects with bilateral permanent mandibular first molars for inclusion in this investigation. The incidences of separate DL root (distal 2 roots with 1 canal for each root, 2 roots 2 canals [2R2C]) and separate DL canal in 1 distal root (distal 1 root with 2 separate canals, 1 root 2 canals [1R2C]) were investigated. The distances from DL canal to buccal cortical bone and from DB canal to buccal cortical bone were measured.

RESULTS

The incidence of 2R2C was 26.6% (373 of 1400) on the right side and 19.0% (266 of 1400) on the left side, with a statistically significant difference (P < .001). The incidence of 1R2C was 3.5% (49 of 1400) on the right side and 4.5% (63 of 1400) on the left side. Mean distance from DB canal to buccal cortical bone was 3.37 mm in 2R2C (n = 639) and 4.17 mm in 1R2C (n = 112). Mean distance from DL canal to buccal cortical bone was 8.63 mm in 2R2C and 7.19 mm in 1R2C. Statistical difference was detected between 2R2C and 1R2C for both DB and DL canals (P < .001 and P < .001, respectively).

CONCLUSIONS

Separate DL root is common in the mandibular first molar in a Korean population. Knowledge of the occurrence of DL root and buccal bone thickness can improve the success rate of endodontic microsurgery.

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    Authors+Show Affiliations

    Kim SY
    Department of Conservative Dentistry, Seoul St Mary's Dental Hospital, Catholic University of Korea, Seoul, Korea.
    Yang SE
    No affiliation info available

    MeSH

    AdultCephalometryCone-Beam Computed TomographyDental Pulp CavityFemaleHumansIncidenceMaleMandibleMass ScreeningMolarOdontometryRepublic of KoreaSex FactorsTooth Root

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    22341064

    Citation

    Kim, Sin-Young, and Sung-Eun Yang. "Cone-beam Computed Tomography Study of Incidence of Distolingual Root and Distance From Distolingual Canal to Buccal Cortical Bone of Mandibular First Molars in a Korean Population." Journal of Endodontics, vol. 38, no. 3, 2012, pp. 301-4.
    Kim SY, Yang SE. Cone-beam computed tomography study of incidence of distolingual root and distance from distolingual canal to buccal cortical bone of mandibular first molars in a Korean population. J Endod. 2012;38(3):301-4.
    Kim, S. Y., & Yang, S. E. (2012). Cone-beam computed tomography study of incidence of distolingual root and distance from distolingual canal to buccal cortical bone of mandibular first molars in a Korean population. Journal of Endodontics, 38(3), pp. 301-4. doi:10.1016/j.joen.2011.10.023.
    Kim SY, Yang SE. Cone-beam Computed Tomography Study of Incidence of Distolingual Root and Distance From Distolingual Canal to Buccal Cortical Bone of Mandibular First Molars in a Korean Population. J Endod. 2012;38(3):301-4. PubMed PMID: 22341064.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Cone-beam computed tomography study of incidence of distolingual root and distance from distolingual canal to buccal cortical bone of mandibular first molars in a Korean population. AU - Kim,Sin-Young, AU - Yang,Sung-Eun, Y1 - 2012/01/13/ PY - 2011/07/27/received PY - 2011/10/25/revised PY - 2011/10/26/accepted PY - 2012/2/21/entrez PY - 2012/2/22/pubmed PY - 2012/7/21/medline SP - 301 EP - 4 JF - Journal of endodontics JO - J Endod VL - 38 IS - 3 N2 - INTRODUCTION: The purpose of this study was to investigate the incidence of separate distolingual (DL) root and separate DL canal in 1 distal root and to measure the distance from distobuccal (DB) and DL canal to buccal cortical bone of mandibular first molars in a Korean population by using cone-beam computed tomography images. METHODS: Screening identified 1400 subjects with bilateral permanent mandibular first molars for inclusion in this investigation. The incidences of separate DL root (distal 2 roots with 1 canal for each root, 2 roots 2 canals [2R2C]) and separate DL canal in 1 distal root (distal 1 root with 2 separate canals, 1 root 2 canals [1R2C]) were investigated. The distances from DL canal to buccal cortical bone and from DB canal to buccal cortical bone were measured. RESULTS: The incidence of 2R2C was 26.6% (373 of 1400) on the right side and 19.0% (266 of 1400) on the left side, with a statistically significant difference (P < .001). The incidence of 1R2C was 3.5% (49 of 1400) on the right side and 4.5% (63 of 1400) on the left side. Mean distance from DB canal to buccal cortical bone was 3.37 mm in 2R2C (n = 639) and 4.17 mm in 1R2C (n = 112). Mean distance from DL canal to buccal cortical bone was 8.63 mm in 2R2C and 7.19 mm in 1R2C. Statistical difference was detected between 2R2C and 1R2C for both DB and DL canals (P < .001 and P < .001, respectively). CONCLUSIONS: Separate DL root is common in the mandibular first molar in a Korean population. Knowledge of the occurrence of DL root and buccal bone thickness can improve the success rate of endodontic microsurgery. SN - 1878-3554 UR - https://www.unboundmedicine.com/medline/citation/22341064/Cone_beam_computed_tomography_study_of_incidence_of_distolingual_root_and_distance_from_distolingual_canal_to_buccal_cortical_bone_of_mandibular_first_molars_in_a_Korean_population_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0099-2399(11)01241-6 DB - PRIME DP - Unbound Medicine ER -