TRUEBA MUÑOZ , Paloma

En la profesión de ingeniero donde a diario se idea, proyecta y construye sistemas industriales, se tiene la necesidad de un compromiso con el tratamiento de los recursos del planeta en el que vivimos, vehiculando y dando soporte técnico de forma rentable a las iniciativas empresariales, desde el respeto y sensibilidad a los aspectos...

La diferencia de rigidez entre el tejido óseo y los implantes de Titanio (Ti) implica un apantallamiento de tensiones que promueve la reabsorción ósea y un incremento de la probabilidad de fractura. Los objetivos principales de este trabajo son el diseño, la fabricación y la caracterización de sólidos cilíndricos de Ti comercialmente puro, Ti...

Ergonomic and psychosocial risks in the workplace have become a growing concern in the industry. The lack of management and control can have a significant impact on the health and well-being of workers. Specifically, one of the challenges related to sustainable development goals regarding diversity and equality in the workplace is the inclusion...

In the present work, the use of porous titanium is proposed as a solution to the difference in stiffness between the implant and bone tissue, avoiding the bone resorption. Conventional powder metallurgical technique is an industrially established route for fabrication of this type of material. The results are discussed in terms of the influence...

In this work, a sequential compaction device has been successfully developed and implemented to produce commercially pure titanium cylinders, in which the porosity increases from the core to the surface or vice versa. The radial graded porosity (three concentric layers) have been obtained by conventional powder-metallurgy (PM) route and/or...

Bone resorption events and consequent failure of titanium implants are frequently related to stress-shielding problems, due to stiffness mismatch with respect to bone. This is a mechanical incompatibility problem, which is difficult to resolve because of the challenge of replacing highly anisotropic biomechanical systems, as is the case of...

The efficiency and comfort of daily tasks are intricately shaped by the dynamic interaction between users and technology. User perceptions wield significant influence over initial judgments, impacting user behavior, attitudes, and the overall connection with the product. In the context of childhood development, the influence of toys on accurate...

The selection of materials and manufacturing processes holds a profound influence on the sensory and perceptual experiences children derive from toys, shaping their overall interaction with the product. It is imperative for toys to not only entertain but also contribute positively to the holistic development of a child's personality. This...

Stress-shielding and loosening compromise the success of dental implants under real-life service conditions. This work evaluates the mechanical behavior of superficially modified porous titanium dental implants fabricated by two different routes: conventional powder metallurgy and space-holder techniques. A novel, feasible and repetitive...

Titanium and its alloys are reference materials in biomedical applications because of their desirable properties. However, one of the most important concerns in long-term prostheses is bone resorption as a result of the stress-shielding phenomena. Development of porous titanium for implants with a low Young's modulus has accomplished increasing...

Titanium cylinders with radial graded porosity, which are potentially suitable for biomedical applications (replacement of cortical and trabecular bones involved in different joint and dental restorations), have been developed by a novel uniaxial and sequential compaction device, based on powder metallurgy techniques. The macrostructural,...

The use of porous titanium samples fabricated by space-holder powder metallurgy with bioactive coatings has already been reported to prevent resorption of the bone surrounding the implant and improve osseointegration, respectively. However, the presence of pores as well as the poor adherence and the brittle behavior inherent to glassy coatings...

Junta de Andalucía (Spain) / FEDER (EU), through the project Ref. P12-TEP-1401

The failure of titanium implants is associated with two main problems that include the bone resorption and fracture of the surrounding bone tissue (stiffness incompatibility) and implant loosening (poor osseointegration). The development of porous titanium implants with low Young modulus solve the stress shielding phenomenon, while the...

Ti prosthesis have shown better biological compatibility, mechanical performance, and resistance to corrosion in cases of bone replacements. Nevertheless, fully dense Ti in connection with bone-host tissues show stress-shielding phenomenon that, together with the development of frequent undesirable microbial infections, may lead to implant...

Design, manufacture and validation of a simple and economic device that allows producing Ti cylinders with directed porosity applying the freeze-casting technique, and the study of the influence on the internal structure of the Ti porous samples when different materials are used for the vessel (alumina or Teflon).

Ministry of Economy and Innovation (Spain) project MAT2015-71284-P

Ti6Al4V samples, obtained by selective laser melting (SLM), were subjected to successive treatments: acid etching, chemical oxidation in hydrogen peroxide solution and thermochemical processing. The effect of temperature and time of acid etching on the surface roughness, morphology, topography and chemical and phase composition after the...

The discrepancy between the stiffness of commercially pure titanium and cortical bone  tissue compromises its success as a biomaterial. The use of porous titanium has been widely studied,  however, it is still challenging to obtain materials able to replicate the porous structure of the bones ...

In this work, the surface of porous titanium samples obtained by the space-holder technique was treated with a femtosecond laser to improve their osseointegration. Instrumented micro-indentation and scratch test were implemented to evaluate the tribo-mechanical behavior of the surface of the modified samples. A detailed study of micro-hardness,...

In this work, the fatigue and cellular performance of novel superficially treated porous titanium dental implants made up using conventional powder metallurgy and space-holder techniques (30 vol.% and 50 vol.%, both with a spacer size range of 100–200 µm) are evaluated. Before the sintering stage, a specific stage of CNC milling of the screw...

The use of titanium implants with adequate porosity (content, size and morphology) could solve the stress shielding limitations that occur in conventional titanium implants. Experiments to assess the cellular response (adhesion, proliferation and differentiation of osteoblasts) on implants are expensive, time-consuming and delicate. In this...

The demand for dental implants is increasing, although there is a wide variety of implants currently available in the market, it is necessary to implement improvements in their design and/or the selection of materials used. The development of biomimetic and bioactive Ti scaffolds for bone regeneration is necessary. In this context, this article...

A great variety of powder metallurgy techniques can produce biomimetic porous titanium structures with similar mechanical properties to host bone tissue. In this work, loose sintering and space holder techniques, two frequently used metallurgical techniques, are compared to evaluate the influences of porosity (content, size, morphology and wall...