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Título:
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Fatigue of narrow dental implants: influence of the hardening method
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Autor/a:
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Pérez Antoñanzas, Roman; Gargallo Albiol, Jordi; Altuna Fistolera, Pablo; Herrero-Climent, Mariano; Gil Mur, Francisco Javier
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Notas:
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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. |
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Materia(s):
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-Implants dentals
-Implants dentals estrets
-Propietats mecàniques
-Fatiga
-Aliatge de titani
-Aliatge Ti – Zr
-Enduriment
-Fractura
-Duresa
-Titani comercialment pur
-Implantes dentales
-Implantes dentales estrechos
-Propiedades mecánicas
-Fatiga
-Aleación de titanio
-Aleación Ti – Zr
-Endurecimiento
-Fractura
-Dureza
-Titanio comercialmente puro
-Dental implants
-Narrow dental implants
-Mechanical properties
-Fatigue
-Titanium alloys
-Ti–Zr alloy
-Hardening
-Fracture
-Hardness
-Commercially pure titanium
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Derechos:
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© 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/).
https://creativecommons.org/licenses/by/4.0/
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Tipo de documento:
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Artículo
Artículo - Versión publicada |
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Editor:
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MDPI
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