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KJO Korean Journal of Orthodontics

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eISSN 2005-372X
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Original Article

Korean J Orthod 2021; 51(1): 23-31

Published online January 25, 2021 https://doi.org/10.4041/kjod.2021.51.1.23

Copyright © The Korean Association of Orthodontists.

Evaluation of mandibular buccal shelf characteristics in the Colombian population: A cone-beam computed tomography study

Natalia Escobar-Correaa , Maria Antonia Ramírez-Bustamantea, Luis Alejandro Sánchez-Uribea, Juan Carlos Upegui-Zeaa, Patricia Vergara-Villarrealb, Diana Milena Ramírez-Ossaa

aDepartment of Orthodontics, Faculty of Dentistry, University of Antioquia, Medellín, Colombia
bDepartment of Orthodontics, Faculty of Dentistry, University of Cartagena, Cartagena, Colombia

Correspondence to:Diana Milena Ramírez-Ossa.
Professor, Orthodontic Program Director, Department of Orthodontics, Faculty of Dentistry, University of Antioquia, Calle 70 # 52-51, Medellín, Colombia.
Tel +57-4-219-6772 e-mail milena.ramirez@udea.edu.co

Received: May 13, 2020; Revised: August 19, 2020; Accepted: August 21, 2020

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: To evaluate the mandibular buccal shelf (MBS) in terms of the angulation and bone depth and thickness according to sex, age, and sagittal and vertical skeletal patterns in a Colombian population using cone-beam computed tomography (CBCT). Accordingly, the optimal site for miniscrew insertion in this area was determined. Methods: This descriptive, retrospective study included 64 hemi-arches of 34 patients. On CBCT images, the angulation, buccal bone depth (4 and 6 mm from the cementoenamel junction [CEJ] of MBS), and buccal bone thickness (6 and 11 mm from the CEJ of MBS) were measured at the mesial and distal roots of the mandibular first and second molars. Results: There were no statistically significant differences in the angulation, depth, and thickness of MBS between male and female patients. The values for the bone around the distal root of the mandibular second molar were significantly greater than the other values. The osseous characteristics were significantly better in participants aged 16–24 years. Class III patients exhibited the best osseous characteristics, with the bone depth at 6 mm being significantly different from that in Class I and Class II patients. Although values tended to be greater in patients with low angles, the difference was not statistically significant. Conclusions: MBS provides an optimal bone surface for miniscrew insertion, with better osseous characteristics at the distal root of the mandibular second molar, 4 mm from CEJ. Adolescent patients, Class III patients, and patients with a low angle exhibit the most favorable osseous characteristics in the MBS area.

Keywords: Miniscrew, Cone-beam computed tomography, Bone-implant contact, Anchorage

Article

Original Article

Korean J Orthod 2021; 51(1): 23-31

Published online January 25, 2021 https://doi.org/10.4041/kjod.2021.51.1.23

Copyright © The Korean Association of Orthodontists.

Evaluation of mandibular buccal shelf characteristics in the Colombian population: A cone-beam computed tomography study

Natalia Escobar-Correaa , Maria Antonia Ramírez-Bustamantea, Luis Alejandro Sánchez-Uribea, Juan Carlos Upegui-Zeaa, Patricia Vergara-Villarrealb, Diana Milena Ramírez-Ossaa

aDepartment of Orthodontics, Faculty of Dentistry, University of Antioquia, Medellín, Colombia
bDepartment of Orthodontics, Faculty of Dentistry, University of Cartagena, Cartagena, Colombia

Correspondence to:Diana Milena Ramírez-Ossa.
Professor, Orthodontic Program Director, Department of Orthodontics, Faculty of Dentistry, University of Antioquia, Calle 70 # 52-51, Medellín, Colombia.
Tel +57-4-219-6772 e-mail milena.ramirez@udea.edu.co

Received: May 13, 2020; Revised: August 19, 2020; Accepted: August 21, 2020

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: To evaluate the mandibular buccal shelf (MBS) in terms of the angulation and bone depth and thickness according to sex, age, and sagittal and vertical skeletal patterns in a Colombian population using cone-beam computed tomography (CBCT). Accordingly, the optimal site for miniscrew insertion in this area was determined. Methods: This descriptive, retrospective study included 64 hemi-arches of 34 patients. On CBCT images, the angulation, buccal bone depth (4 and 6 mm from the cementoenamel junction [CEJ] of MBS), and buccal bone thickness (6 and 11 mm from the CEJ of MBS) were measured at the mesial and distal roots of the mandibular first and second molars. Results: There were no statistically significant differences in the angulation, depth, and thickness of MBS between male and female patients. The values for the bone around the distal root of the mandibular second molar were significantly greater than the other values. The osseous characteristics were significantly better in participants aged 16–24 years. Class III patients exhibited the best osseous characteristics, with the bone depth at 6 mm being significantly different from that in Class I and Class II patients. Although values tended to be greater in patients with low angles, the difference was not statistically significant. Conclusions: MBS provides an optimal bone surface for miniscrew insertion, with better osseous characteristics at the distal root of the mandibular second molar, 4 mm from CEJ. Adolescent patients, Class III patients, and patients with a low angle exhibit the most favorable osseous characteristics in the MBS area.

Keywords: Miniscrew, Cone-beam computed tomography, Bone-implant contact, Anchorage