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  • Analysis of the misfit of dental implant-supported prostheses made with three manufacturing processes

     Fernandez Yagüe, Marc-antoni; Delgado Garoña, Luis María; Molmeneu Trias, Meritxell; García, David; Rodriguez Rius, Daniel
    Journal of prosthetic dentistry
    Date of publication: 2014-02-01
    Journal article

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    Statement of problem. The microgap between implant components has been associated with complications such as screw loosening or adverse biologic responses. Purpose. The purpose of this study was to quantify the microroughness of the mating surfaces of implant components manufactured with different processes, to quantify the microgap between implant components, and to determine whether a correlation exists between microroughness and the microgap. Clinical Implications: The microgap of implant-abutment connections could be reduced with smoother mating surfaces.

  • A microcontinuum model for mechanical properties of esophageal tissue: Experimental methodology and constitutive analysis

     Sanchez Molina, David; Velazquez Ameijide, Juan; Arregui Dalmases, Carlos; Rodriguez Rius, Daniel; Quintana Martínez, Víctor; Shafieian, M.; Crandall, Jeff R.
    Annals of biomedical engineering
    Date of publication: 2013-01-03
    Journal article

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    Accurate material properties of tissues are a key factor for the improvement of medical procedures and treatments. Experimental data are essential in order to formulate and validate a useful constitutive model for predicting the mechanical behavior of tissues in these procedures. This study develops a comprehensive experimental protocol at multiple length scale levels in order to obtain stress¿strain curves for esophagus tissue. This paper compares two different models: a conventional, non-linear elastic model, and a microcontinuum model based on fiber rearrangement. Also, a detailed description of the experimental procedure is provided. While the focus was on esophageal tissues, the experimental procedure and microcontinuum are considered widely applicable to other samples of soft tissue.

  • Obtención y caracterización de un recubrimiento de quitosano con nanopartículas de plata sobre titanio

     Rodriguez Rius, Daniel; Mancino, Andrea Gennaro; Avilès, Marc; Godoy Gallardo, Maria; Gil Mur, Francisco Javier
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2013-10-26
    Presentation of work at congresses

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    Se ha desarrollado un recubrimiento de quitosano dopado con nanopartículas de plata sobre la superficie de titanio comercialmente puro de grado 2 para conferir a la superficie propiedades antibacterianas. Se ha escogido como método de inmovilización la deposición de la capa de quitosano mediante dip-coating, que es un método rápido y fiable de formación de capas de recubrimiento. El proceso estudiado consta de dos etapas: la formación de las nanopartículas de plata y la formación del film de quitosano. Dichas etapas han sido estudiadas con tal de optimizar la estabilidad de la capa y la respuesta antibacteriana in vitro.

  • Obtención y caracterización de un recubrimiento de poli(etilenglicol) sobre titanio por polimerización por plasma

     Buxadera Palomero, Judit; Gil Mur, Francisco Javier; Canal Barnils, Cristina; Rodriguez Rius, Daniel
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2013-10-26
    Presentation of work at congresses

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    En este trabajo se ha estudiado la formación de un recubrimiento de poli(etilenglicol) (PEG) sobre la superficie de titanio comercialmente puro de grado 2 para conferir a la superficie carácter antifouling con respecto a la adsorción de proteínas y a la adhesión bacteriana. Se ha escogido como método de inmovilización la polimerización por plasma, que es un método rápido que permite enlazar el polímero con la superficie. Este proceso consta de dos etapas: la activación superficial y la polimerización. Dichas etapas han sido estudiadas con tal de conseguir la mayor activación y el recubrimiento con mejores propiedades antifouling respecto a las proteínas y a las bacterias.

  • Surface functionalization of metallic biomaterials with antibacterial compounds

     Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    European cells and materials
    Date of publication: 2013-10-01
    Journal article

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  • Surface functionalization of metallic biomaterials with antibacterial compounds

     Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    International symposium on surface and interface of biomaterials
    Presentation's date: 2013-09-25
    Presentation of work at congresses

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  • Desenvolupament d'un recobriment polimèric antibacterià amb nanopartícules

     Rodriguez Rius, Daniel; Godoy Gallardo, Maria; Mancino, G.A.
    Jornades de Recerca EUETIB
    Presentation's date: 2012-12-04
    Presentation of work at congresses

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  • Metodología de aprendizaje para las competencias genéricas ¿trabajo en grupo" y "aprendizaje autónomo¿ dirigido a estudiantado de ingeniería: Método propuesto para asignaturas de materiales

     Fargas Ribas, Gemma; Rodriguez Rius, Daniel; Llumà Fuentes, Jordi; Jorba Peiró, Jordi; Salán Ballesteros, Mª Núria
    Congrés Internacional de Docència Universitària i Innovació
    Presentation's date: 2012-07-04
    Presentation of work at congresses

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  • Learning experiences of the GidMAT-RIMA group with Materials Engineering students in autonomous learning and working in teams generic skills

     Rodriguez Rius, Daniel; Fargas Ribas, Gemma; Llumà Fuentes, Jordi; Jorba Peiró, Jordi; Salán Ballesteros, Mª Núria
    World Conference on Educational Sciences
    Presentation's date: 2012-02-04
    Presentation of work at congresses

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    The Universitat Politecnica de Catalunya (UPC-BarcelonaTech) has a list of generic skills included in its degrees, which are the focus of the Materials Science and Engineering Community of Practice GidMAT, related to RIMA (http://www.upc.edu/rima) project. GidMAT focus on teaching innovation and developing new learning methodologies. A learning methodology for the generic skill Working in teams has been developed, based on a structured rotation of roles within working teams and between teams. Results are compared to the evaluation of the generic skill Autonomous learning. The new methodology provides students with benefits in knowledge and skills acquisition, and the docent with an improved assessment of results at a relative low cost in time dedication. (C) 2012 Published by Elsevier Ltd. Selection and/or peer review under responsibility of Prof. Dr. Huseyin Uzunboylu

  • Biomechanical study of intervertebral disc degeneration  Open access

     González Gutiérrez, Ramiro Arturo
    Defense's date: 2012-01-09
    Department of Mechanical Engineering, Universitat Politècnica de Catalunya
    Theses

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    Degeneration and age affect the biomechanics of the intervertebral disc, by reducing its stiffness, flexibility and shock absorption capacities against daily movement and spinal load. The biomechanical characterization of intervertebral discs is achieved by conducting mechanical testing to vertebra-disc-vertebra segments and applying axial, shear, bend and torsion loads, statically or dynamically, with load magnitudes corresponding to the physiological range. However, traditional testing does not give a view of the load and deformation states of the disc components: nucleus pulposus, annulus fibrosus and endplate. Thus, the internal state of stress and strains of the disc can only be predicted by numerical methods, one of which is the finite element method. The objective of this thesis was, to study the biomechanics of degenerated intervertebral discs to load conditions in compression, bending and torsion, by using mechanical testing and a finite element model of disc degeneration, based on magnetic resonance imaging (MRI). Therefore, lumbar discs obtained from cadavers corresponding to spinal levels L2-L3 and L4-L5 with mild to severe degeneration were used. Intervertebral osteochondrosis and spondylosis deformans were identified, being the disc space collapse, the most striking feature. Next, all discs were tested to static and dynamic load conditions, the results gained corresponded to the disc stiffness (in compression, bending and torsion), stress relaxation and dynamic response. Of these, the stiffness response was used to validate the disc model. The testing results suggest that discs with advanced degeneration over discs with mild degeneration are, less rigid in compression, less stiffer under bending and torsion, showed less radial bulge, and reduce their viscoelastic and damping properties. This study shows that degeneration has an impact on the disc biomechanical properties which can jeopardize normal functionality. Development of one finite element model of disc degeneration started by choosing a MRI of a L2-L3 disc. Segmentation of vertebra bone and disc materials followed, and were based on pixel brightness and radiology fundamentals, then a finite element mesh was created to account for the disc irregular shape. The disc materials were modeled as hyperelastic and the bone materials were modeled as orthotropic and isotropic. Adjustment of material properties was based on integrity of the annulus fibrosus, giving a stiffness value matching that of a mild degeneration disc. Then, validation of the model was performed, and included a study of the distributions of stress and strain under loads of compression, bending and torsion. The results from all load simulations show that the disc undergoes large deformations. In contrast, the vertebrae are subjected to higher stress but with negligible deformations. In compression, the model predicted formation of symmetrical disc bulge which agree with the testing behavior. The nucleus pulposus showed to be the principal load carrier with negative principal stresses and strains. In bending and torsion, the annulus fibrosus showed to be the principal load carrier with large symmetrical principal strains and stresses for the former loading and large shearing for the latter. The study showed the importance of soft tissue deformation, mostly noticed in advanced degeneration. In contrast, the higher stresses in the vertebra over those of the intervertebral disc showed the relevance of bone predisposition to fracture. Such kind of studies, should contribute to the understanding of the biomechanics of the intervertebral disc.

    La degeneración y edad afectan la biomecánica del disco intervertebral, reduciendo la capacidad de rigidez, flexibilidad y atenuación de impactos, contra el movimiento y carga del raquis. La caracterización biomecánica del disco se realiza con ensayos mecánicos a segmentos de vértebra-disco-vértebra y aplicando cargas axiales, cortantes, flexión y torsión, estáticas ó dinámicas, con magnitudes de carga según el intervalo fisiológico. Sin embargo, las pruebas tradicionales no dan una visión de los estados de carga y deformación de los componentes del disco: núcleo pulposo, anillo fibroso y placa terminal. Por lo tanto, el estado interno de esfuerzos y deformaciones del disco, solo puede ser predicho con métodos numéricos, uno de los cuales es el método de elemento finito. El objetivo de esta tesis fue, estudiar la biomecánica de discos intervertebrales degenerados a las condiciones de carga en compresión, flexión y torsión, mediante el uso de ensayos mecánicos y de un modelo de elementos finitos de la degeneración de disco, basado en imágenes con resonancia magnética (MRI). Por lo tanto, se usaron discos lumbares L2-L3 y L4-L5 obtenidos de cadáveres, con degeneración leve a severa. Se identificó osteocondrosis intervertebral y espondilosis deformante, siendo el colapso del espacio intervertebral el aspecto más relevante. Luego, todos los discos fueron ensayados a condiciones de carga estática y dinámica, y los resultados correspondieron a la rigidez del disco (a compresión, flexión y torsión), a la relajación de tensiones y a la respuesta dinámica. De éstos, la rigidez fue usada para validar el modelo de disco. Los resultados de los ensayos sugieren que los discos con degeneración avanzada sobre aquellos con degeneración leve son, menos rigidos a compresión, menos rigidos a flexión y torsión, presentan menor protuberancia radial, y reducen sus propiedades viscoelásticas y de amortiguamiento. El estudio muestra que la degeneración impacta las propiedades biomecánicas del disco, poniendo en riesgo la funcionalidad normal. El desarollo de un modelo de elementos finitos de la degeneración de disco inició eligiendo una secuencia de resonancia magnética de un disco L2-L3. La segmentación de los materiales del disco y de las vértebras se realizó basado en intensidad de brillo del pixel y en fundamentos de radiología, y se creó una malla de elementos finitos correspondiente a la forma irregular del disco. Los materiales del disco se modelaron como hiperelásticos y los tejidos óseos se modelaron como materiales ortotrópicos e isotrópicos. El ajuste de propiedades de los materiales fue basado en la integridad del anillo fibroso, y dio una rigidez correspondiente a la de un disco con degeneración leve. Luego, se realizó la validación del modelo, e incluyó un estudio de las distribuciones de esfuerzo y deformación a las condiciones de carga en compresión, flexión y torsión. Los resultados de todas las simulaciones de carga mostraron que el disco es sometido a grandes deformaciones. En contraste, las vértebras fueron sometidas a mayores esfuerzos pero con deformaciones insignificantes. En compresión, el modelo predijo la formación de una protuberancia radial simétrica, en concordancia con la experimentación. El núcleo pulposo mostró ser el portador principal de carga, con tensiones y deformaciones principales negativas. En flexión y torsión, el anillo fibroso mostró ser el portador principal de carga, con grandes deformaciones y tensiones principales simétricas para la primera carga, y con grandes tensiones cortantes para la segunda carga. El estudio mostró la importancia de las deformaciones de los tejidos blandos, principalmente notados en la degeneración avanzada. Por el contrario, las tensiones mayores en los cuerpos vertebrales sobre aquellas del disco intervertebral mostraron la relevancia de la predisposición a las fracturas óseas. Este tipo de estudio debe contribuir a la comprensión de la biomecánica del disco intervertebral.

  • Análisis de fallos de implantes fracturados

     Punset Fusté, Miquel; Gil Mur, Francisco Javier; Rodriguez Rius, Daniel
    Date: 2012-11-19
    Report

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  • Caracterización superficial de los implantes PHIBO TSH-S4

     Punset Fusté, Miquel; Gil Mur, Francisco Javier; Rodriguez Rius, Daniel
    Date: 2012-11-16
    Report

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  • Caracterización superficial de los implantes BIOMET 3i

     Punset Fusté, Miquel; Gil Mur, Francisco Javier; Rodriguez Rius, Daniel
    Date: 2012-11-16
    Report

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  • Sellado biomimético de implantes dentales (BIOSELLADO)

     Rodriguez Rius, Daniel
    Participation in a competitive project

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  • Learning experiences of the GidMAT-RIMA group with Materials Engineering students in autonomous learning and working in teams generic skills

     Rodriguez Rius, Daniel; Fargas Ribas, Gemma; Llumà Fuentes, Jordi; Jorba Peiró, Jordi; Salán Ballesteros, Mª Núria
    Procedia - Social and behavioral sciences
    Date of publication: 2012-09-01
    Journal article

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  • Improvement in adhesion of the brackets to the tooth by sandblasting treatment

     Espinar, E.; Barrera, J.; Llamas, J. M:; Solano, E.; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    Journal of materials science. Materials in medicine
    Date of publication: 2012-02
    Journal article

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    In oral orthodontic treatments, achievement of a good adhesion between brackets and teeth surfaces is essential. One way to increase adhesion is to apply a surface treatment of teeth facing surfaces through the projection of abrasive particles to produce a surface roughness which improves adhesion of the bracket to the tooth, because of the significantly increased contact between the two surfaces. The effect on adhesion through the use of this technique in different types of brackets, as well as through the use of different blasting particles, however, is yet not well described. In this study we have included three types of brackets which are commonly used in orthodontic therapies (two of them a mesh-type and the third one a micro-milled type) with a contact surface area of 11.16, 8.85 and 6.89 mm2 respectively. These brackets were used combined with a sandblasting treatment with two different types of abrasive particles, alumina (Al2O3) and silicon carbide (SiC) and applied to natural teeth in vitro. The abrasive particles used are bio-compatible and usually used in achieving increased roughness for improved adherence in biomedical materials. Sandblasting was performed at 2 bars for 2 s; three particle sizes were used: 80, 200 and 600 lm. Non-blasted samples were used as control. Each of the pieces were cemented to natural teeth with a selfcuring composite. Samples were stored in physiologic serum at 5 C temperature. Tensile tests were performed with a universal testing machine. Brackets treated with sandblasted particles were measured to have an increased adhesion as compared to the control sample. The highest bond strength was measured for samples sandblasted with alumina particles of 80 and 200 lm combined with micromilled brackets. The recorded stresses did not exceed the tensile strength of tooth enamel.

  • Biofunctionalisation of titanium surfaces with TGF-beta inhibitor peptides

     Sevilla Sanchez, Pablo; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    European Conference on Biomaterials
    Presentation's date: 2011-09-05
    Presentation of work at congresses

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  • Access to the full text
    Modificación de la interface titanio-tejido vivo para mejora de la osteointegración  Open access

     Rodriguez Rius, Daniel
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2011-11-04
    Presentation of work at congresses

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    Los implantes fabricados en titanio pueden sufrir problemas de biocompatibilidad por diversos motivos, siendo uno de ellos una falta en la respuesta osteointegrativa por parte del organismo. El presente estudio repasa las posibles mejoras en la osteointegración del implante de titanio mediante la biofuncionalización de superficies de titanio. Una de las posibles vías de mejora es la silanización de la superficie y posterior unión covalente con un péptido que contiene la secuencia RGD. Esta secuencia está presente en diversas proteínas de la matriz extracelular, como la fibronectina y la vitronectina, y es un motivo de anclaje de la célula a la matriz extracelular a través de la integrina de membrana 65-81.

  • INCORPORATION OF SILVER ON TITANIUM SURFACE BY ANODIZING

     Godoy Gallardo, Maria; Gil Mur, Francisco Javier; Rodriguez Rius, Daniel
    IBEC Symposium on Bioengineering and Nanomedicine
    Presentation's date: 2011-10-18
    Presentation of work at congresses

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  • Biofunctionalization of titanium surfaces with TGF-ß inhibitor peptides

     Gil Mur, Francisco Javier; Rodriguez Rius, Daniel; Sevilla Sanchez, Pablo; Holmberg, K; Aparicio, Conrado
    European Conference on Biomaterials
    Presentation's date: 2011-09
    Presentation of work at congresses

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  • Comparación entre tornillos de hueso alógeno, de polímero reabsorbible y de acero inoxidable

     Rodriguez Rius, Daniel
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2011-11-05
    Presentation of work at congresses

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  • Incorporation of silver on titanium surface by anodizing

     Godoy Gallardo, Maria; Rodríguez Hernández, Ana Guadalupe; Delgado, L.; Gil, F.J.; Rodriguez Rius, Daniel
    Jornades de Recerca EUETIB
    Presentation's date: 2011-12-21
    Presentation of work at congresses

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  • TGF-ß1 inhibitor peptide coatings on dental implants for improving osseointegration

     Gil Mur, Francisco Javier; Sevilla Sanchez, Pablo; Aparicio, Conrado; Rodriguez Rius, Daniel; Holmberg, K
    European Association for Osseointegration Annual Scientific Congress
    Presentation's date: 2011-10
    Presentation of work at congresses

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  • Optimización de aleaciones B-TI con bajo módulo elástico para aplicaciones biomédicas

     González Colominas, Marta
    Defense's date: 2011-12-20
    Department of Materials Science and Metallurgy, Universitat Politècnica de Catalunya
    Theses

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  • Preparación de una propuesta para la convocatoria NMP-2010-LARGE-4 del FP7

     Rodriguez Rius, Daniel; Canal Barnils, Cristina; Español Pons, Montserrat; Manero Planella, Jose M.; Gil Mur, Francisco Javier; Pegueroles Neyra, Marta; Ginebra Molins, Maria Pau
    Participation in a competitive project

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  • Variation of roughness and adhesion strength of deposited apatite layers on titanium dental implants

     Aparicio, C; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    Materials science and engineering C. Biomimetic and supramolecular systems
    Date of publication: 2011-03-12
    Journal article

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    It is known that surface roughness and chemical composition of the titanium surface influence the osseointegration of titanium implants. Most commercial dental implants offer a shot-blasted rough surface. It is also known that apatite layers coating the surface of titanium implants improve bone response, but the adhesion of the layer to the substrate poses some problems. In this study the roughness and adhesion strength to a titanium dental implant surface of an apatite layer deposited via wet chemistry after a thermochemical treatment were compared with those of plasma-sprayed apatite layers and machined titanium surfaces. Different surface conditions have been studied: (a) as-received machined dental implant surface; (b) grit-blasted titanium surface; (c) grit-blasted and thermochemicallytreated titanium surface; (d) titanium surfaces coated with plasma-sprayed apatite. The morphology and roughness of the samples were measured and compared. The adhesion of the apatite layers to the titanium was compared by means of a scratch test. Measured roughness showed that the deposition of an apatite layer did not affect roughness but plasmasprayed apatite produced a decrease on roughness values when compared to control samples. Both roughness and adhesion strength of the deposited apatite layer to the titanium substrate were higher than those of the plasma-sprayed apatite.

  • Effectiveness of different silanes to immobilize short biofucnional peptides on titanium surfaces

     Gil Mur, Francisco Javier; Salvagni, Emiliano; Pegueroles Neyra, Marta; Sevilla Sanchez, Pablo; Godoy Gallardo, Maria; Rodriguez Rius, Daniel; Aparicio, Conrado
    European Conference on Biomaterials
    Presentation's date: 2010-09
    Presentation of work at congresses

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  • Biofunctionalization of titanium surfaces for osseointegration optimization

     Sevilla Sanchez, Pablo; Godoy Gallardo, Maria; Salvagni, Emiliano; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    IBEC Symposium on Bioengineering and Nanomedicine
    Presentation's date: 2010
    Presentation of work at congresses

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  • Electrochemical analysis of peptide-functionalized titanium dental implant surfaces

     Gil Mur, Francisco Javier; Sevilla Sanchez, Pablo; Rodriguez Rius, Daniel; Vidal, P.
    NanoBio Conference
    Presentation's date: 2010-09
    Presentation of work at congresses

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  • Consideraciones sobre las prótesis con tántalo

     Rodriguez Rius, Daniel
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2010-11-13
    Presentation of work at congresses

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  • Vectorización y liberación controlada de elementos bioactivos en biomateriales

     Rodriguez Rius, Daniel
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2010-11-13
    Presentation of work at congresses

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  • Máquina de preparación de muestras para Histologías de Tejidos con Biomateriales Implantados

     Pegueroles Neyra, Marta; Canal Barnils, Cristina; Rodriguez Rius, Daniel; Español Pons, Montserrat; Manero Planella, Jose M.; Gil Mur, Francisco Javier; Montufar Jimenez, Edgar Benjamin; Ginebra Molins, Maria Pau
    Participation in a competitive project

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  • Preparación de propuestas para la convocatoria HEALTH 2009 del FP7

     Rodriguez Rius, Daniel; Gil Mur, Francisco Javier; Salvagni, Emiliano; Español Pons, Montserrat; Ginebra Molins, Maria Pau
    Participation in a competitive project

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  • BIOMATERIALES CON PROPIEDADES ANTIMICROBIANAS Y DE REGENERACIÓN OSEA PARA CIRUGIA ORAL Y MAXILOFACIAL

     Gil Mur, Francisco Javier; Pegueroles Neyra, Marta; Rodriguez Rius, Daniel; Lluch Margarit, Sara; Ginebra Molins, Maria Pau
    Participation in a competitive project

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  • Electrochemical analysis of peptide-functionalized titanium dental implant surfaces

     Rodriguez Rius, Daniel; Gil Mur, Francisco Javier; Sevilla Sanchez, Pablo; Vidal, G.
    European cells and materials
    Date of publication: 2010-11-09
    Journal article

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  • Biofunctionalization of titanium surfaces for osseintegration process improvement

     Sevilla Sanchez, Pablo; Godoy, M.; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier; Salvagni, Emiliano
    Journal of physics: conference series
    Date of publication: 2010-06-01
    Journal article

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    This study aims to improve the osseointegration of titanium implants through surface immobilization of peptides that induce a beneficial biological response. This was carried out biofunctionalizating titanium surfaces by silanization and subsequent covalent binding of a peptide with a sequence that promotes cell adhesion. Objective: The development of a new technique of immobilization of oligopeptides on the surface of titanium by using 3-chloropropyltrietoxisilane (CPTES) as bonding agent between the surface of titanium and the peptide. Materials and methods: A physicochemical characterization of the surfaces through the techniques of XPS, ToF-SIMS and contact angle was performed. Also cell adhesion studies have been conducted to evaluate in vitro biological response. Results: Through the process of silanization the titanium surface is completely covered with CPTES, which allows the subsequent accession of oligopeptides. The cell adhesion results show a higher cell adhesion and cell extension on biofunctionalized samples. Conclusions: We developed a system of covalent binding of oligopeptides on titanium surfaces that can modify the biological response of the attached cells.

  • Unión de péptidos a superficies de titanio para mejora de la osteointegración

     Godoy Gallardo, Maria; Sevilla Sanchez, Pablo; Rodriguez Rius, Daniel; Gil Mur, Francisco Javier
    Congreso de la Sociedad Ibérica de Biomecánica y Biomateriales
    Presentation's date: 2009-11-06
    Presentation of work at congresses

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  • Unión de péptidos a superficies de titanio para la mejora de la osteointegración

     Godoy Gallardo, Maria; Sevilla Sanchez, Pablo; Gil Mur, Francisco Javier; Rodriguez Rius, Daniel
    Biomecánica
    Date of publication: 2009
    Journal article

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  • Biomecánica

     Rodriguez Rius, Daniel
    Collaboration in journals

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  • Caracterización físico-química de la superficie de 9 implantes dentales con 3 distintos tratamientos de superficie

     Rodriguez Rius, Daniel; García Saban, Francisco Javier
    Medicina oral, patología oral y cirugia bucal
    Date of publication: 2005
    Journal article

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  • Biomaterials

     Rodriguez Rius, Daniel
    Collaboration in journals

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  • Titanio

     Rodriguez Rius, Daniel
    Date of publication: 2001-06-30
    Book chapter

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  • Nuevos materiales ligeros y sus procesos

     Rodriguez Rius, Daniel
    Date of publication: 2001-06-30
    Book chapter

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  • Fatiga oligocíclica de la aleación Ti6Al4V nitriruda termoquímicamente

     Rodriguez Rius, Daniel; Manero Planella, Jose M.; Gil Mur, Francisco Javier; Planell Estany, Josep Antón
    Revista de Metalurgia
    Date of publication: 2001-03
    Journal article

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  • Low cycle fatigue behaviour of Ti-6Al-4V thermochemically nitrided for its use in hip prosthesis

     Rodriguez Rius, Daniel; Manero Planella, Jose M.; Gil Mur, Francisco Javier; Planell Estany, Josep Antón
    Journal of materials science. Materials in medicine
    Date of publication: 2001-02
    Journal article

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  • Galvanic corrosion behaviour of titanium implants coupled to dental alloys

     Gil Mur, Francisco Javier; Rodriguez Rius, Daniel; Planell Estany, Josep Antón; Cortada, M; Giner, Ll; Costa, S
    Journal of materials science. Materials in medicine
    Date of publication: 2000-02
    Journal article

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  • Nitruración gaseosa de Ti y Ti-6Al-4V para la mejora de la resistencia al desgaste en prótesis articulares

     Rodriguez Rius, Daniel
    Defense's date: 2000-02-28
    Department of Materials Science and Metallurgy, Universitat Politècnica de Catalunya
    Theses

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  • Obtención de capas de nitruro de titanio mediante tratamiento termoquímico en titanio y Ti6A14V y caracterización de sus propiedades para aplicaciones biomédicas  Open access

     Rodriguez Rius, Daniel
    Defense's date: 2000-02-28
    Department of Materials Science and Metallurgy, Universitat Politècnica de Catalunya
    Theses

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    En la presente tesis doctoral se ha estudiado y caracterizado la obtención de capas de nitruro en titanio y Ti6Al4V mediante tratamiento termoquímico de nitruración para la mejora de la dureza superficial y de la resistencia al desgaste del titanio y del Ti6Al4V.Tras un estudio estadístico de los parámetros ópticos y el efecto del tratamiento en los mecanismos de desgaste, se realizó un estudio químico y microestructural, así como de la cinética de nitruración, mediante diferentes técnicas, como rugosimetría, microscopia, difracción de electrones, de rayos X y espectroscopia Auger. El estudio de las propiedades mecánicas se realizó mediante ensayos mecánicos de tracción y de fatiga oligocíclica. Se procedió posteriormente a la caracterización electroquímica mediante técnicas de análisis electroquímico. Por último, se procedió a un estudio de la biocompatibilidad del tratamiento de nitruración.Las conclusiones obtenidas son que el tratamiento termoquímico de nitruración del titanio y de la aleación Ti6Al4V produce una capa lisa y homogénea en las muestras tratadas de titanio y de la aleación Ti6Al4V, con incrementos de la dureza superficial de hasta un 500% respecto al material no tratado, y con obtención de reducciones del coeficiente de desgaste de más de un orden de magnitud en las condiciones ensayadas.La capa de nitruros formada tiene un espesor de 1-2 ?m, formada por pequeños granos de nitruros con diámetros del orden de los 50-100 nm. El componente principal de la capa es nitruro de titanio (Ti2N). Las muestras nitruradas estudiadas exhiben un buen comportamiento electroquímico, con elevadas resistencias de transferencia de carga. A partir de los resultados obtenidos en los ensayos realizados el Ti6Al4V nitrurado no se apreciaron señales de toxicidad.

    In this thesis it has been studied and characterised the obtention of titanium and Ti6Al4V nitride layers by means of thermo-chemical nitriding processing for the improvement of the surface hardness and wear resistance. After statistical study of the optical parameters and the effect of nitriding in the wear mechanisms, chemical and microstructural characterisations were made, as well as the study of nitriding kinetics by means of different techniques, like profilometry, optical and electron microscopy, X-ray and electron diffraction techniques and Auger spectroscopy. The study of the mechanical properties was made by means of static and fatigue mechanical tests. Electrochemical characterisation was made by means of electrochemical analyses techniques. Finally, the biocompatibility of Ti6Al4V nitrided samples was studied. It was concluded that thermo-chemical nitriding of titanium and Ti6Al4V alloy produces a smooth and homogenous layer in the treated samples, with increments of surface hardness up to 500% compared to non-treated material. Reductions of the wear coefficient of an order of magnitude were also achieved in test conditions. The obtained nitride layer has a thickness of 1-2 micrometer, and it is formed by small nitride grains with diameters of the order of 50-100 nm. The main component of the layer is titanium nitride (Ti2N). The studied nitrided samples exhibit excellent electrochemical behaviour, with a high resistance to electric load transference. The results obtained in the toxicity tests did not show signals of toxicity of the nitrided Ti6Al4V.

  • Finite analysis modelling of stress-strain distribution on bone around a dental implant coated with a polymer film

     Rodriguez Rius, Daniel
    International Workshop on Computational Micromechanics IWCMM10
    Presentation's date: 2000-08-31
    Presentation of work at congresses

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  • Fatiga oligocíclica de la aleación Ti6Al4V nitrurada termoquímicamente

     Rodriguez Rius, Daniel
    VII Congreso Nacional de Propiedades Mecánicas de Sólidos
    Presentation's date: 2000-06-27
    Presentation of work at congresses

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