dc.contributor
Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials
dc.contributor
Universitat Politècnica de Catalunya. BBT - Biomaterials, Biomecànica i Enginyeria de Teixits
dc.contributor
Universitat Politècnica de Catalunya. CRnE - Centre de Recerca en Ciència i Enginyeria Multiescala de Barcelona
dc.contributor
Universidad de Sevilla
dc.contributor
Universitat de València
dc.contributor
Universitat Internacional de Catalunya
dc.contributor.author
Velasco Ortega, Eugenio
dc.contributor.author
Flichy Fernández, Antonio
dc.contributor.author
Punset Fuste, Miquel
dc.contributor.author
Jimenez Guerra, Álvaro
dc.contributor.author
Manero Planella, José María
dc.contributor.author
Gil Mur, Francisco Javier
dc.date.issued
2019-11-12
dc.identifier
Velasco 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.
dc.identifier
https://hdl.handle.net/2117/184119
dc.identifier
10.3390/ma12223728
dc.description.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.
dc.description.abstract
Peer Reviewed
dc.description.abstract
Postprint (published version)
dc.format
application/pdf
dc.publisher
Multidisciplinary Digital Publishing Institute (MDPI)
dc.relation
https://www.mdpi.com/1996-1944/12/22/3728
dc.rights
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights
Attribution 4.0 International (CC BY 4.0)
dc.subject
Àrees temàtiques de la UPC::Enginyeria biomèdica::Biomaterials
dc.subject
Dental implants
dc.subject
Fracture mechanics
dc.subject
Materials -- Fatigue
dc.subject
Narrow dental implants
dc.subject
Plastic deformation
dc.subject
Implants dentals
dc.subject
Mecànica de fractura
dc.subject
Materials -- Fatiga
dc.title
Fracture and fatigue of titanium narrow dental implants: New trends in order to improve the mechanical response
