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A morphometric analysis of the mandibular canal by cone beam computed tomography and its relevance to the sagittal split ramus osteotomy

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Abstract

Purpose

The aim of the present study was to morphometrically analyze the mandibular canal through the mandibular ramus by cone beam computed tomography (CBCT) and to relate the findings to performing sagittal split ramus osteotomy.

Methods

CBCT of 200 patients were analyzed. Five parameters were measured at the axial scan, from the mandibular foramen to 21 mm below it (3-mm intervals). The canal was classified according to the position within the bone marrow space. Variations were evaluated according to age, sex, side, and number of mandibular teeth.

Results/conclusions

The following measurements increased gradually towards the most inferior level of measurement: the total thickness of the mandibular ramus through the center of the mandibular canal, the width of the bone marrow space (both buccal and lingual), and the narrowest width from the mandibular canal inner cortical to the mandibular ramus external cortical. The inner diameter of the mandibular canal slightly decreased to the same direction. Concerning the mandibular canal position within the bone marrow space, the percentage of the separate type increased towards the most inferior level of measurement, and the contact and fusion types decreased. Age, number of teeth, and sex had no significant influence on the total thickness of the mandibular ramus and on the narrowest width from the mandibular canal inner cortical to the mandibular ramus external cortical.

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Acknowledgments

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Department of Prosthodontics, Faculty of Odontology, Malmö University, Carl Gustafs väg 34, 205 06, Malmö, Sweden

    Bruno Ramos Chrcanovic

  2. Slice Diagnóstico Volumétrico por Imagem, Belo Horizonte, Brazil

    Vinícius de Carvalho Machado

  3. Clinics for Prosthodontics, Centre of Dental Specialist Care, Malmö, Sweden

    Björn Gjelvold

Authors
  1. Bruno Ramos Chrcanovic
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  2. Vinícius de Carvalho Machado
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  3. Björn Gjelvold
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Corresponding author

Correspondence to Bruno Ramos Chrcanovic.

Ethics declarations

The authors declare that they have no conflict of interest. All persons gave their informed consent prior to the inclusion of their CBCT examinations in the study. The study was approved by the local Ethics Committee.

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Chrcanovic, B.R., de Carvalho Machado, V. & Gjelvold, B. A morphometric analysis of the mandibular canal by cone beam computed tomography and its relevance to the sagittal split ramus osteotomy. Oral Maxillofac Surg 20, 183–190 (2016). https://doi.org/10.1007/s10006-016-0550-9

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  • DOI: https://doi.org/10.1007/s10006-016-0550-9

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