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Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis

Background. The design of an orthodontic mini-implant is a significant factor in determining its primary stability and its clinical success. The aim of this study was to measure the relative effect of mini-implant design factors on primary stability of orthodontic mini-implants. Methods. Thirty-two...

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Autores principales: Sadr Haghighi, Amir Hooman, Pouyafar, Vahid, Navid, Ali, Eskandarinezhad, Mahsa, Abdollahzadeh Baghaei, Tannaz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Tabriz University of Medical Sciences 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6773917/
https://www.ncbi.nlm.nih.gov/pubmed/31592304
http://dx.doi.org/10.15171/joddd.2019.013
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author Sadr Haghighi, Amir Hooman
Pouyafar, Vahid
Navid, Ali
Eskandarinezhad, Mahsa
Abdollahzadeh Baghaei, Tannaz
author_facet Sadr Haghighi, Amir Hooman
Pouyafar, Vahid
Navid, Ali
Eskandarinezhad, Mahsa
Abdollahzadeh Baghaei, Tannaz
author_sort Sadr Haghighi, Amir Hooman
collection PubMed
description Background. The design of an orthodontic mini-implant is a significant factor in determining its primary stability and its clinical success. The aim of this study was to measure the relative effect of mini-implant design factors on primary stability of orthodontic mini-implants. Methods. Thirty-two 3-dimensional assemblies of mini-implant models with their surrounding bone were generated using finite element analysis software. The maximum displacement of each mini-implant model was measured as they were loaded with a 2-N horizontal force. Employing Taguchi’s design of experiments as a statistical method, the contribution of each design factor to primary stability was calculated. As a result of the great effect of the upper diameter and length, to better detect the impact of the remaining design factors, another set of 25 models with a fixed amount of length and diameter was generated and evaluated. Results. The diameter and length showed a great impact on the primary stability in the first set of experiments (P<0.05). According to the second set of experiments, increased taper angle in the threaded and non-threaded area decreased the primary stability. There was also an optimum amount of 2.5 mm for threaded taper length beyond which the primary stability decreased. Conclusion. It is advisable to increase the diameter and length if primary stability is at risk. In the second place, a minimum amount of taper angle, both in the threaded and non-threaded area with an approximate proportion of 20% of threaded taper length to MI length, would be desirable for MIs with a moderate size.
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spelling pubmed-67739172019-10-07 Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis Sadr Haghighi, Amir Hooman Pouyafar, Vahid Navid, Ali Eskandarinezhad, Mahsa Abdollahzadeh Baghaei, Tannaz J Dent Res Dent Clin Dent Prospects Original Article Background. The design of an orthodontic mini-implant is a significant factor in determining its primary stability and its clinical success. The aim of this study was to measure the relative effect of mini-implant design factors on primary stability of orthodontic mini-implants. Methods. Thirty-two 3-dimensional assemblies of mini-implant models with their surrounding bone were generated using finite element analysis software. The maximum displacement of each mini-implant model was measured as they were loaded with a 2-N horizontal force. Employing Taguchi’s design of experiments as a statistical method, the contribution of each design factor to primary stability was calculated. As a result of the great effect of the upper diameter and length, to better detect the impact of the remaining design factors, another set of 25 models with a fixed amount of length and diameter was generated and evaluated. Results. The diameter and length showed a great impact on the primary stability in the first set of experiments (P<0.05). According to the second set of experiments, increased taper angle in the threaded and non-threaded area decreased the primary stability. There was also an optimum amount of 2.5 mm for threaded taper length beyond which the primary stability decreased. Conclusion. It is advisable to increase the diameter and length if primary stability is at risk. In the second place, a minimum amount of taper angle, both in the threaded and non-threaded area with an approximate proportion of 20% of threaded taper length to MI length, would be desirable for MIs with a moderate size. Tabriz University of Medical Sciences 2019 2019-08-14 /pmc/articles/PMC6773917/ /pubmed/31592304 http://dx.doi.org/10.15171/joddd.2019.013 Text en © 2019 Sadr Haghighi et al. http://creativecommons.org/licenses/by/4.0/ This is an Open Access article published and distributed by Tabriz University of Medical Sciences under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Sadr Haghighi, Amir Hooman
Pouyafar, Vahid
Navid, Ali
Eskandarinezhad, Mahsa
Abdollahzadeh Baghaei, Tannaz
Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title_full Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title_fullStr Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title_full_unstemmed Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title_short Investigation of the optimal design of orthodontic mini-implants based on the primary stability: A finite element analysis
title_sort investigation of the optimal design of orthodontic mini-implants based on the primary stability: a finite element analysis
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6773917/
https://www.ncbi.nlm.nih.gov/pubmed/31592304
http://dx.doi.org/10.15171/joddd.2019.013
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