A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory

Background and Objective: Dental implants, as one of the most frequently used medical prostheses, are widely utilized as a replacement for the lost teeth in dentistry, which can provide the patients with comfort and utility in mastication and digestion purposes. However, there is a demanding require...

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Autores principales:	Amirhossein Jafariandehkordi, Zahra Jafariandehkordi
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Dental implant Mandible Maximum equivalent strain Mechanostat Theory Optimization Computer applications to medicine. Medical informatics R858-859.7
Acceso en línea:	https://doaj.org/article/a11de0c6004f46ce8b68e738eeb83a67
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spelling	oai:doaj.org-article:a11de0c6004f46ce8b68e738eeb83a672021-12-02T05:04:30ZA finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory2666-990010.1016/j.cmpbup.2021.100033https://doaj.org/article/a11de0c6004f46ce8b68e738eeb83a672021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S266699002100032Xhttps://doaj.org/toc/2666-9900Background and Objective: Dental implants, as one of the most frequently used medical prostheses, are widely utilized as a replacement for the lost teeth in dentistry, which can provide the patients with comfort and utility in mastication and digestion purposes. However, there is a demanding requirement for the implant mechanical quality improvements carried out by optimizing the implant size and material characteristics. The improvements made to the design variables of a dental implant can benefit the supporting bone viability and reduce the risk of bone injury and loosening implants. Therefore, the purpose of the present finite element-based study was to optimize the design variables of an implant screw in a geometrically developed implant-mandible assembly for minimizing the resultant difference of the maximum equivalent strain value in the mandible to an as possible admissible, safe limit compared with pre-implantation state, based on the Mechanostat Theory. The usage of the Mechanostat Theory as the criterion for which the difference of mandible maximum equivalent strain value after implantation was considered as an objective function to be minimized from before-implantation state, was newly addressed in this study. Methods: In order to form the 3D geometry of the mandible, a patient-specific CT image dataset was used, and a 3D model of a dental implant with relevant parts was extracted based on a literature design, after which the assembly of the mandible and implant was imported to a finite element software to analyze the biomechanical behavior of the mandible bone under a mechanical pressure load exerted on the implant crown, as the mastication equivalence. The same procedure was conducted for importing the 2nd premolar tooth geometry with the same boundary conditions of the mandible to compare the results. Results: The results indicated that there was 50.2% decline in the maximum equivalent strain difference from 44.2 με to 22.2 με as the consequence of the optimized sizes of the implant screw length and radius. Furthermore, there was a sensible amount of sensitivity for the maximum equivalent strain to the alterations in the screw radius rather than length. Conclusions: Finally, the proposed, optimized geometry for the implant screw improved the baseline design and provided a useful basis for further research.Amirhossein JafariandehkordiZahra JafariandehkordiElsevierarticleDental implantMandibleMaximum equivalent strainMechanostat TheoryOptimizationComputer applications to medicine. Medical informaticsR858-859.7ENComputer Methods and Programs in Biomedicine Update, Vol 1, Iss , Pp 100033- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dental implant Mandible Maximum equivalent strain Mechanostat Theory Optimization Computer applications to medicine. Medical informatics R858-859.7
spellingShingle	Dental implant Mandible Maximum equivalent strain Mechanostat Theory Optimization Computer applications to medicine. Medical informatics R858-859.7 Amirhossein Jafariandehkordi Zahra Jafariandehkordi A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
description	Background and Objective: Dental implants, as one of the most frequently used medical prostheses, are widely utilized as a replacement for the lost teeth in dentistry, which can provide the patients with comfort and utility in mastication and digestion purposes. However, there is a demanding requirement for the implant mechanical quality improvements carried out by optimizing the implant size and material characteristics. The improvements made to the design variables of a dental implant can benefit the supporting bone viability and reduce the risk of bone injury and loosening implants. Therefore, the purpose of the present finite element-based study was to optimize the design variables of an implant screw in a geometrically developed implant-mandible assembly for minimizing the resultant difference of the maximum equivalent strain value in the mandible to an as possible admissible, safe limit compared with pre-implantation state, based on the Mechanostat Theory. The usage of the Mechanostat Theory as the criterion for which the difference of mandible maximum equivalent strain value after implantation was considered as an objective function to be minimized from before-implantation state, was newly addressed in this study. Methods: In order to form the 3D geometry of the mandible, a patient-specific CT image dataset was used, and a 3D model of a dental implant with relevant parts was extracted based on a literature design, after which the assembly of the mandible and implant was imported to a finite element software to analyze the biomechanical behavior of the mandible bone under a mechanical pressure load exerted on the implant crown, as the mastication equivalence. The same procedure was conducted for importing the 2nd premolar tooth geometry with the same boundary conditions of the mandible to compare the results. Results: The results indicated that there was 50.2% decline in the maximum equivalent strain difference from 44.2 με to 22.2 με as the consequence of the optimized sizes of the implant screw length and radius. Furthermore, there was a sensible amount of sensitivity for the maximum equivalent strain to the alterations in the screw radius rather than length. Conclusions: Finally, the proposed, optimized geometry for the implant screw improved the baseline design and provided a useful basis for further research.
format	article
author	Amirhossein Jafariandehkordi Zahra Jafariandehkordi
author_facet	Amirhossein Jafariandehkordi Zahra Jafariandehkordi
author_sort	Amirhossein Jafariandehkordi
title	A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
title_short	A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
title_full	A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
title_fullStr	A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
title_full_unstemmed	A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory
title_sort	finite element optimization of the design variables of a dental implant screw based on the mechanostat theory
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/a11de0c6004f46ce8b68e738eeb83a67
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A finite element optimization of the design variables of a dental implant screw based on the Mechanostat Theory

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