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Fracture and fatigue of titanium narrow dental implants: New trends in order to improve the mechanical response

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10.3390/ma12223728
 
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hdl:2117/184119

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Velasco Ortega, Eugenio
Flichy Fernández, Antonio
Punset Fuste, MiquelMés informacióMés informacióMés informació
Jimenez Guerra, Álvaro
Manero Planella, José MaríaMés informacióMés informacióMés informació
Gil Mur, Francisco JavierMés informacióMés informacióMés informació
CovenanteeUniversidad de Sevilla; Universitat de València; Universitat Internacional de Catalunya
Document typeArticle
Defense date2019-11-12
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Sixty-four fractured commercially pure titanium (cp-Ti) narrow dental implants (NDIs) with similar macrogeometry and connection designs were studied after different implantation times in humans in order to determine their reliability and to evaluate the causes of the fracture. These NDIs were compared with other similar implants, made with alloyed titanium with 15% Zr and with 12% strained titanium. Original implants were tested under static and fatigue conditions, simulating the tri-axial loads in the mouth by means of a Bionix hydraulic test machine. Fractography was studied using field-emission scanning electron microscopy (FSEM). The results showed that cp-Ti NDI exhibits low strength for mechanical cycling, and the alloyed Ti and strained titanium increase the mechanical strength, guaranteeing long term mechanical behavior. NDIs fractured due to fatigue, and, in some cases, the presence of cracks in the original NDIs quickly led to fracture. These cracks were attributed to plastic deformation during machining were found to be exacerbated due to acid etching in the passivation process. All cases of fracture were cp-Ti dental implants due to the low fatigue limit. The results show that, when titanium is alloyed or cold-worked, the fatigue limit is higher than cp-Ti. This in vitro research will help clinicians to select a better NDI system for safer treatment.
CitationVelasco Ortega, E. [et al.]. Fracture and fatigue of titanium narrow dental implants: New trends in order to improve the mechanical response. "Materials", 12 Novembre 2019, vol. 12, núm. 22, p. 3728:1-3728:11. 
URIhttp://hdl.handle.net/2117/184119
DOI10.3390/ma12223728
ISSN1996-1944
Publisher versionhttps://www.mdpi.com/1996-1944/12/22/3728
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  • Departament de Ciència i Enginyeria de Materials - Articles de revista [909]
  • CRnE - Centre de Recerca en Ciència i Enginyeria Multiescala de Barcelona - Articles de revista [6]
  • BBT - Grup de recerca en Biomaterials, Biomecànica i Enginyeria de Teixits - Articles de revista [479]
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