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Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis
OBJECTIVE: To examine the effect of bite force on the displacement and stress distribution of orthodontic mini-implants (OMIs) in the molar region according to placement site, insertion angle, and loading direction. METHODS: Five finite element models were created using micro-computed tomography (mi...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Korean Association of Orthodontists
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3822061/ https://www.ncbi.nlm.nih.gov/pubmed/24228236 http://dx.doi.org/10.4041/kjod.2013.43.5.218 |
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author | Lee, Hyeon-Jung Lee, Kyung-Sook Kim, Min-Ji Chun, Youn-Sic |
author_facet | Lee, Hyeon-Jung Lee, Kyung-Sook Kim, Min-Ji Chun, Youn-Sic |
author_sort | Lee, Hyeon-Jung |
collection | PubMed |
description | OBJECTIVE: To examine the effect of bite force on the displacement and stress distribution of orthodontic mini-implants (OMIs) in the molar region according to placement site, insertion angle, and loading direction. METHODS: Five finite element models were created using micro-computed tomography (microCT) images of the maxilla and mandible. OMIs were placed at one maxillary and two mandibular positions: between the maxillary second premolar and first molar, between the mandibular second premolar and first molar, and between the mandibular first and second molars. The OMIs were inserted at angles of 45° and 90° to the buccal surface of the cortical bone. A bite force of 25 kg was applied to the 10 occlusal contact points of the second premolar, first molar, and second molar. The loading directions were 0°, 5°, and 10° to the long axis of the tooth. RESULTS: With regard to placement site, the displacement and stress were greatest for the OMI placed between the mandibular first molar and second molar, and smallest for the OMI placed between the maxillary second premolar and first molar. In the mandibular molar region, the angled OMI showed slightly less displacement than the OMI placed at 90°. The maximum Von Mises stress increased with the inclination of the loading direction. CONCLUSIONS: These results suggest that placement of OMIs between the second premolar and first molar at 45° to the cortical bone reduces the effect of bite force on OMIs. |
format | Online Article Text |
id | pubmed-3822061 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Korean Association of Orthodontists |
record_format | MEDLINE/PubMed |
spelling | pubmed-38220612013-11-13 Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis Lee, Hyeon-Jung Lee, Kyung-Sook Kim, Min-Ji Chun, Youn-Sic Korean J Orthod Original Article OBJECTIVE: To examine the effect of bite force on the displacement and stress distribution of orthodontic mini-implants (OMIs) in the molar region according to placement site, insertion angle, and loading direction. METHODS: Five finite element models were created using micro-computed tomography (microCT) images of the maxilla and mandible. OMIs were placed at one maxillary and two mandibular positions: between the maxillary second premolar and first molar, between the mandibular second premolar and first molar, and between the mandibular first and second molars. The OMIs were inserted at angles of 45° and 90° to the buccal surface of the cortical bone. A bite force of 25 kg was applied to the 10 occlusal contact points of the second premolar, first molar, and second molar. The loading directions were 0°, 5°, and 10° to the long axis of the tooth. RESULTS: With regard to placement site, the displacement and stress were greatest for the OMI placed between the mandibular first molar and second molar, and smallest for the OMI placed between the maxillary second premolar and first molar. In the mandibular molar region, the angled OMI showed slightly less displacement than the OMI placed at 90°. The maximum Von Mises stress increased with the inclination of the loading direction. CONCLUSIONS: These results suggest that placement of OMIs between the second premolar and first molar at 45° to the cortical bone reduces the effect of bite force on OMIs. Korean Association of Orthodontists 2013-10 2013-10-25 /pmc/articles/PMC3822061/ /pubmed/24228236 http://dx.doi.org/10.4041/kjod.2013.43.5.218 Text en © 2013 The Korean Association of Orthodontists. http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Lee, Hyeon-Jung Lee, Kyung-Sook Kim, Min-Ji Chun, Youn-Sic Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title | Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title_full | Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title_fullStr | Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title_full_unstemmed | Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title_short | Effect of bite force on orthodontic mini-implants in the molar region: Finite element analysis |
title_sort | effect of bite force on orthodontic mini-implants in the molar region: finite element analysis |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3822061/ https://www.ncbi.nlm.nih.gov/pubmed/24228236 http://dx.doi.org/10.4041/kjod.2013.43.5.218 |
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