모바일 메뉴

KJO Korean Journal of Orthodontics

Open Access

pISSN 2234-7518
eISSN 2005-372X
QR Code QR Code

퀵메뉴 버튼

Article

home All Articles View
Split Viewer

Article In Press

Korean J Orthod

Published online May 3, 2021

Copyright © The Korean Association of Orthodontists.

Available bone for insertion of extra-alveolar miniscrews in the infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: a CBCT study

Murilo Matiasa; Carlos Flores-Mirb; Márcio Rodrigues de Almeidac; Bruno da Silva Vieirad; Karina Maria Salvatore de Freitase; Daniela Calabrese Nunesf; Marcos Cezar Ferreirag; Weber Ursih.

aD.D.S., M.Sc., Ph.D. Associate Professor. Department of Orthodontics. Fuarullhos University, São Paulo, Brazil.(corresponding author)
bD.D.S., M.Sc., Ph.D. Professor and Orthodontic Graduate Program Director, School of Dentistry, University of Albetra, Edmonton, Alberta, Canada.
cD.D.S., M.Sc., Ph.D. Adjunct Professor, Department of Orthodontics, School of Dentistry, Universidade Norte do Paraná, Paraná, Brazil.
dD.D.S., M.Sc., Ph.D. Private practice, Belo Horizonte, Minas Gerais, Brazil
eD.D.S., M.Sc., Ph.D. Associate Professor. Department of Orthodontics. Ingá Dental School, Maringá, Paraná, Brazil
fD.D.S. Orthodontic Graduate Student. Department of Orthodontics. Guarulhos University, São Paulo, Brazil.
gD.D.S., M.Sc., Ph.D. Private practice, Rio de Janeiro, Brazil.
hD.D.S., M.Sc., Ph.D. Associate Professor of Orthodontics. Department of Social and Pediatric Dentistry. Institute of Science and Technology, São Paulo State University, São José dos Campos, Brazil.

Correspondence to:Prof. Dr. Murilo Matias
Department of Orthodontics Guarulhos University(UNG) Rua Engenheiro Prestes Maia, Huarulhos - SP - 07023-070, Brazil Business Phone/Fax: 55 11 2464-1700
e-mail: Murilo.matias@prof.ung.br

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 through Cone Beam Computed Tomography (CBCT), ideal areas for insertion of extra-alveolar (EA) miniscrews in the infra-zygomatic crest (IZC) and mandibular buccal shelf (MBS) based on different craniofacial patterns. Methods: CBCT reconstructions of untreated individuals were used to evaluate IZC and MBS areas. The subjects were divided into 3 groups according to the craniofacial pattern: Group 1 - 15 with brachyfacial pattern (mean age of 23.3 years); Group 2 - 15 with mesofacial pattern (mean age of 19.24 years); Group 3 - 15 with dolichofacial pattern (mean age of 17.79 years). In the IZC, the evaluated areas were at 11, 13 and 15mm above the buccal cusp tips of the right and left first molars. In the MBS, the evaluated areas were at the projections of the first molars distal roots and second molars mesial and distal roots, at a 4 and 8mm distance from the CEJ. The intergroup comparison was performed by ANOVA and Tukey test. Results: There was no statistically significant differences in IZC bone thickness in the 3 groups. For MBS bone availability, half the comparisons showed no differences while the other half showed larger amounts of MBS bone thickness in the brachyfacial and dolichofacial patterns. Conclusions: There were no significant differences in IZC bone thickness between the 3 groups. The skeletal facial pattern seems to have some influence, but not likely to a clinically meaningful degree, on the availability of ideal bone thickness for the insertion of EA miniscrews at the MBS area.

Keywords: Mini-screw, Mini-implants, Skeletal anchorage, Extra-alveolar orthodontic anchorage, Temporary anchorage devices.

Article

ahead

Korean J Orthod

Published online May 3, 2021

Copyright © The Korean Association of Orthodontists.

Available bone for insertion of extra-alveolar miniscrews in the infrazygomatic crest and mandibular buccal shelf in different vertical craniofacial patterns: a CBCT study

Murilo Matiasa; Carlos Flores-Mirb; Márcio Rodrigues de Almeidac; Bruno da Silva Vieirad; Karina Maria Salvatore de Freitase; Daniela Calabrese Nunesf; Marcos Cezar Ferreirag; Weber Ursih.

aD.D.S., M.Sc., Ph.D. Associate Professor. Department of Orthodontics. Fuarullhos University, São Paulo, Brazil.(corresponding author)
bD.D.S., M.Sc., Ph.D. Professor and Orthodontic Graduate Program Director, School of Dentistry, University of Albetra, Edmonton, Alberta, Canada.
cD.D.S., M.Sc., Ph.D. Adjunct Professor, Department of Orthodontics, School of Dentistry, Universidade Norte do Paraná, Paraná, Brazil.
dD.D.S., M.Sc., Ph.D. Private practice, Belo Horizonte, Minas Gerais, Brazil
eD.D.S., M.Sc., Ph.D. Associate Professor. Department of Orthodontics. Ingá Dental School, Maringá, Paraná, Brazil
fD.D.S. Orthodontic Graduate Student. Department of Orthodontics. Guarulhos University, São Paulo, Brazil.
gD.D.S., M.Sc., Ph.D. Private practice, Rio de Janeiro, Brazil.
hD.D.S., M.Sc., Ph.D. Associate Professor of Orthodontics. Department of Social and Pediatric Dentistry. Institute of Science and Technology, São Paulo State University, São José dos Campos, Brazil.

Correspondence to:Prof. Dr. Murilo Matias
Department of Orthodontics Guarulhos University(UNG) Rua Engenheiro Prestes Maia, Huarulhos - SP - 07023-070, Brazil Business Phone/Fax: 55 11 2464-1700
e-mail: Murilo.matias@prof.ung.br

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 through Cone Beam Computed Tomography (CBCT), ideal areas for insertion of extra-alveolar (EA) miniscrews in the infra-zygomatic crest (IZC) and mandibular buccal shelf (MBS) based on different craniofacial patterns. Methods: CBCT reconstructions of untreated individuals were used to evaluate IZC and MBS areas. The subjects were divided into 3 groups according to the craniofacial pattern: Group 1 - 15 with brachyfacial pattern (mean age of 23.3 years); Group 2 - 15 with mesofacial pattern (mean age of 19.24 years); Group 3 - 15 with dolichofacial pattern (mean age of 17.79 years). In the IZC, the evaluated areas were at 11, 13 and 15mm above the buccal cusp tips of the right and left first molars. In the MBS, the evaluated areas were at the projections of the first molars distal roots and second molars mesial and distal roots, at a 4 and 8mm distance from the CEJ. The intergroup comparison was performed by ANOVA and Tukey test. Results: There was no statistically significant differences in IZC bone thickness in the 3 groups. For MBS bone availability, half the comparisons showed no differences while the other half showed larger amounts of MBS bone thickness in the brachyfacial and dolichofacial patterns. Conclusions: There were no significant differences in IZC bone thickness between the 3 groups. The skeletal facial pattern seems to have some influence, but not likely to a clinically meaningful degree, on the availability of ideal bone thickness for the insertion of EA miniscrews at the MBS area.

Keywords: Mini-screw, Mini-implants, Skeletal anchorage, Extra-alveolar orthodontic anchorage, Temporary anchorage devices.