Cargando…

Fatigue of Narrow Dental Implants: Influence of the Hardening Method

The use of narrow titanium dental implants (NDI) for small ridges, reduced interdental space, or missing lateral incisors can be a viable option when compared to the conventional wider dental implants. Furthermore, in many cases, standard diameter implant placement may not be possible without grafti...

Descripción completa

Detalles Bibliográficos
Autores principales: Pérez, R.A., Gargallo, J., Altuna, P., Herrero-Climent, M., Gil, F.J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143173/
https://www.ncbi.nlm.nih.gov/pubmed/32245138
http://dx.doi.org/10.3390/ma13061429
_version_ 1783519551914246144
author Pérez, R.A.
Gargallo, J.
Altuna, P.
Herrero-Climent, M.
Gil, F.J.
author_facet Pérez, R.A.
Gargallo, J.
Altuna, P.
Herrero-Climent, M.
Gil, F.J.
author_sort Pérez, R.A.
collection PubMed
description The use of narrow titanium dental implants (NDI) for small ridges, reduced interdental space, or missing lateral incisors can be a viable option when compared to the conventional wider dental implants. Furthermore, in many cases, standard diameter implant placement may not be possible without grafting procedures, which increases the healing time, cost, and morbidity. The aim of this study was to analyze the mechanical viability of the current narrow implants and how narrow implants can be improved. Different commercially available implants (n = 150) were tested to determine maximum strength, strain to fracture, microhardness, residual stress, and fatigue obtaining the stress–number of cycles to fracture (SN) curve. Fractography was studied by scanning electron microscopy. The results showed that when the titanium was hardened by the addition of 15% of Zr or 12% cold worked, the fatigue limit was higher than the commercially pure grade 4 Ti without hardening treatment. Grade 4 titanium without hardening treatment in narrow dental implants can present fractures by fatigue. These narrow implants are subjected to high mechanical stresses and the mechanical properties of titanium do not meet the minimal requirements, which lead to frequent fractures. New hardening treatments allow for the mechanical limitations of conventional narrow implants to be overcome in dynamic conditions. These hardening treatments allow for the design of narrow dental implants with enhanced fatigue life and long-term behavior.
format Online
Article
Text
id pubmed-7143173
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-71431732020-04-14 Fatigue of Narrow Dental Implants: Influence of the Hardening Method Pérez, R.A. Gargallo, J. Altuna, P. Herrero-Climent, M. Gil, F.J. Materials (Basel) Article The use of narrow titanium dental implants (NDI) for small ridges, reduced interdental space, or missing lateral incisors can be a viable option when compared to the conventional wider dental implants. Furthermore, in many cases, standard diameter implant placement may not be possible without grafting procedures, which increases the healing time, cost, and morbidity. The aim of this study was to analyze the mechanical viability of the current narrow implants and how narrow implants can be improved. Different commercially available implants (n = 150) were tested to determine maximum strength, strain to fracture, microhardness, residual stress, and fatigue obtaining the stress–number of cycles to fracture (SN) curve. Fractography was studied by scanning electron microscopy. The results showed that when the titanium was hardened by the addition of 15% of Zr or 12% cold worked, the fatigue limit was higher than the commercially pure grade 4 Ti without hardening treatment. Grade 4 titanium without hardening treatment in narrow dental implants can present fractures by fatigue. These narrow implants are subjected to high mechanical stresses and the mechanical properties of titanium do not meet the minimal requirements, which lead to frequent fractures. New hardening treatments allow for the mechanical limitations of conventional narrow implants to be overcome in dynamic conditions. These hardening treatments allow for the design of narrow dental implants with enhanced fatigue life and long-term behavior. MDPI 2020-03-20 /pmc/articles/PMC7143173/ /pubmed/32245138 http://dx.doi.org/10.3390/ma13061429 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pérez, R.A.
Gargallo, J.
Altuna, P.
Herrero-Climent, M.
Gil, F.J.
Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title_full Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title_fullStr Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title_full_unstemmed Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title_short Fatigue of Narrow Dental Implants: Influence of the Hardening Method
title_sort fatigue of narrow dental implants: influence of the hardening method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143173/
https://www.ncbi.nlm.nih.gov/pubmed/32245138
http://dx.doi.org/10.3390/ma13061429
work_keys_str_mv AT perezra fatigueofnarrowdentalimplantsinfluenceofthehardeningmethod
AT gargalloj fatigueofnarrowdentalimplantsinfluenceofthehardeningmethod
AT altunap fatigueofnarrowdentalimplantsinfluenceofthehardeningmethod
AT herreroclimentm fatigueofnarrowdentalimplantsinfluenceofthehardeningmethod
AT gilfj fatigueofnarrowdentalimplantsinfluenceofthehardeningmethod