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Hedayati, R. (author), Janbaz, S. (author), Sadighi, M. (author), Mohammadi-Aghdam, M. (author), Zadpoor, A.A. (author)Although the initial mechanical properties of additively manufactured porous biomaterials are intensively studied during the last few years, almost no information is available regarding the evolution of the mechanical properties of implant-bone complex as the tissue regeneration progresses. In this paper, we studied the effects of tissue...journal article 2017
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de Krijger, Joep (author), Rans, C.D. (author), Van Hooreweder, B.S.K. (author), Lietaert, Karel (author), Pouran, B. (author), Zadpoor, A.A. (author)Additively manufactured (AM) porous metallic biomaterials are considered promising candidates for bone substitution. In particular, AM porous titanium can be designed to exhibit mechanical properties similar to bone. There is some experimental data available in the literature regarding the fatigue behavior of AM porous titanium, but the...journal article 2017
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Hedayati, R. (author), Leeflang, M.A. (author), Zadpoor, A.A. (author)Mechanical metamaterials exhibit unusual mechanical properties that originate from their topological design. Pentamode metamaterials are particularly interesting because they could be designed to possess any thermodynamically admissible elasticity tensor. In this study, we additively manufacture the metallic pentamode metamaterials from a...journal article 2017
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Bobbert, F.S.L. (author), Lietaert, K. (author), Eftekhari, A.A. (author), Pouran, B. (author), Ahmadi, S.M. (author), Weinans, Harrie (author), Zadpoor, A.A. (author)Porous biomaterials that simultaneously mimic the topological, mechanical, and mass transport properties of bone are in great demand but are rarely found in the literature. In this study, we rationally designed and additively manufactured (AM) porous metallic biomaterials based on four different types of triply periodic minimal surfaces (TPMS)...journal article 2017
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Bobbert, F.S.L. (author), Zadpoor, A.A. (author)The success of bone substitutes used to repair bone defects such as critical sized defects depends on the architecture of the porous biomaterial. The architectural parameters and surface properties affect cell seeding efficiency, cell response, angiogenesis, and eventually bone formation. The relevant parameters include pore size and porosity,...journal article 2017
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Kolken, H.M.A. (author), Zadpoor, A.A. (author)The surge of interest in so-called "designer materials" during the last few years together with recent advances in additive manufacturing (3D printing) techniques that enable fabrication of materials with arbitrarily complex nano/micro-architecture have attracted increasing attention to the concept of mechanical metamaterials. Owing to their...journal article 2017
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Li, Y. (author), Zhou, J. (author), Pavanram, P. (author), Leeflang, M.A. (author), Fockaert, L.I. (author), Pouran, B. (author), Tümer, N. (author), Schröder, K. U. (author), Mol, J.M.C. (author), Weinans, Harrie (author), Jahr, H. (author), Zadpoor, A.A. (author)An ideal bone substituting material should be bone-mimicking in terms of mechanical properties, present a precisely controlled and fully interconnected porous structure, and degrade in the human body to allow for full regeneration of large bony defects. However, simultaneously satisfying all these three requirements has so far been highly...journal article 2017
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Hedayati, R. (author), Amin Yavari, S. (author), Zadpoor, A.A. (author)Additively manufactured porous titanium implants, in addition to preserving the excellent biocompatible properties of titanium, have very small stiffness values comparable to those of natural bones. Although usually loaded in compression, biomedical implants can also be under tensional, shear, and bending loads which leads to crack initiation...journal article 2017
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Janbaz, S. (author), Noordzij, N. (author), Widyaratih, Dwisetya Safirna (author), Hagen, C.W. (author), Fratila-Apachitei, E.L. (author), Zadpoor, A.A. (author)Lattice structures are used in the design of metamaterials to achieve unusual physical, mechanical, or biological properties. The properties of such metamaterials result from the topology of the lattice structures, which are usually three-dimensionally (3D) printed. To incorporate advanced functionalities into metamaterials, the surface of the...journal article 2017
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Janbaz, S. (author), Weinans, H. (author), Zadpoor, A.A. (author)Recent research has shown the potential of rationally designed geometrical features for controlling the functionality of advanced materials. Of particular recent interest has been the use of geometry for controlling the buckling behaviour of soft materials under compression. However, the effects of geometry may be mixed with those of the...journal article 2016
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Zadpoor, A.A. (author)The emerging concept of mechanical meta-materials has received increasing attention during the last few years partially due to the advances in additive manufacturing techniques that have enabled fabricating materials with arbitrarily complex micro/nano-architectures. The rationally designed micro/nano-architecture of mechanical meta-materials...journal article 2016
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Hedayati, R. (author), Sadighi, M. (author), Mohammadi-Aghdam, M. (author), Zadpoor, A.A. (author)Honeycomb structures have found numerous applications as structural and biomedical materials due to their favourable properties such as low weight, high stiffness, and porosity. Application of additive manufacturing and 3D printing techniques allows for manufacturing of honeycombs with arbitrary shape and wall thickness, opening the way for...journal article 2016
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Hedayati, R. (author), Hosseini-Toudeshky, H (author), Sadighi, M. (author), Mohammadi-Aghdam, M. (author), Zadpoor, A.A. (author)The mechanical behavior of additively manufactured porous biomaterials has recently received increasing attention. While there is a relatively large body of data available on the static mechanical properties of such biomaterials, their fatigue behavior is not yet well-understood. That is partly because systematic study of the fatigue behavior...journal article 2016
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Zadpoor, A.A. (author), Hedayati, R. (author)Recent developments in additive manufacturing techniques have motivated an increasing number of researchers to study regular porous biomaterials that are based on repeating unit cells. The physical and mechanical properties of such porous biomaterials have therefore received increasing attention during recent years. One of the areas that have...journal article 2016
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Hedayati, R. (author), Sadighi, M. (author), Mohammadi-Aghdam, M (author), Zadpoor, A.A. (author)Honeycombs resemble the structure of a number of natural and biological materials such as cancellous bone, wood, and cork. Thick honeycomb could be also used for energy absorption applications. Moreover, studying the mechanical behavior of honeycombs under in-plane loading could help understanding the mechanical behavior of more complex 3D...journal article 2016
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Arbabi, V. (author), Pouran, B. (author), Weinans, Harrie (author), Zadpoor, A.A. (author)Analytical and numerical methods have been used to extract essential engineering parameters such as elastic modulus, Poisson's ratio, permeability and diffusion coefficient from experimental data in various types of biological tissues. The major limitation associated with analytical techniques is that they are often only applicable to problems...journal article 2016
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Janbaz, S. (author), Hedayati, R. (author), Zadpoor, A.A. (author)Nature uses various activation mechanisms to program complex transformations in the shape and functionality of living organisms. Inspired by such natural events, we aimed to develop initially flat (i.e. two-dimensional) programmable materials that, when triggered by a stimulus such as temperature, could self-transform their shape into a complex...journal article 2016
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- Zadpoor, A.A. (author) abstract 2016
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Sarkalkan, N. (author), Loeve, A.J. (author), Van Dongen, K.W.A. (author), Tuijthof, G.J.M. (author), Zadpoor, A.A. (author)(Osteo)chondral defects (OCDs) in the ankle are currently diagnosed with modalities that are not convenient to use in long-term follow-ups. Ultrasound (US) imaging, which is a cost-effective and non-invasive alternative, has limited ability to discriminate OCDs. We aim to develop a new diagnostic technique based on US wave propagation through...journal article 2015
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Zadpoor, A.A. (author)Investigation of the mechanical behavior of biological tissues and biomaterials has been an active area of research for several decades. However, in recent years, the enthusiasm in understanding the mechanical behavior of biological tissues and biomaterials has increased significantly due to the development of novel biomaterials for new fields...journal article 2015