alessandro ruggiero now

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View the profiles of professionals named "Alessandro Ruggiero" on LinkedIn. Looking for something to watch? MRS Bull. doi: 10.1016/j.proeng.2015.01.400, Puértolas, J. However, to obtain such a structure by the traditional method of powder sintering is very difficult, since it is necessary to ensure its compression, which leads to a decrease in porosity and quality of the porous biomaterial, since an indicator such as interconnectedness, which plays an important role in ensuring the transport of nutrients through the pores, is deteriorating (Wang et al., 2009). Engin. It should be noted that even the minimal wear of materials observed in friction couples of the type metal (ceramic) on UHMWPE or metal (ceramic) on XLPE can lead to a decrease in the durability of total hip joint. An analysis of the literature carried out in the framework of this work showed that friction couples in metal-metal or ceramic-ceramic type of an artificial joint have the best prospects, despite the undoubted advantages of the metal/ceramic-UHMWPE/XLPE couples currently widely used. 83, 276–283. Orthop. “Convergence of osteoimmunology and immunomodulation for the development and assessment of bone biomaterials,” in The Immune Response to Implanted Materials and Devices, ed B. Corradetti (Springer), 107–124. 1,287 views; 6 years ago; 2:04. (Click). Mater. Met. Fabrication methods of porous metals for use in orthopaedic applications. (2016). High porosity and large pore size shape memory alloys fabricated by using pore-forming agent (NH4HCO3) and capsule-free hot isostatic pressing. New materials for implants of the human hip joint and technology of their machining with the achievement of high precision and quality of spherical surfaces. • Secondly, this is the problem of the optimal artificial hip joint design, which ensures the best fixation of its elements in bone tissues both at the initial stage and during the entire product life cycle. April 23, 2019 News! Römmelt, C., Munsch, T., Drynda, A., Lessmann, V., Lohmann, C. H., and Bertrand, J. Pauwels, F. (1980). Reviews and scores for Movies involving Alessandro Ruggiero. Biomater. Good, V., Ries, M., Barrack, R. L., Widding, K., Hunter, G., and Heuer, D. (2003). Nat. (2019). The release of these substances from the hollow head can be organized in various ways according to need, including creating even the certain micro holes texturing on the hip head surface. Porous titanium implants fabricated by metal injection molding. Inst Mech. doi: 10.1016/j.actbio.2009.06.002, Watari, F., Yokoyama, A., Omori, M., Hirai, T., Kondo, H., and Uo, M. (2002). developing for 5 years a project to find innovative solutions to increase the active life of people who are already over 50. At first glance, this is a fantastic idea, but, nevertheless, quite feasible. J. Biomim. Arthritis Res. Mater. 4, 56–70. Acta Biomater. Nine years follow-up of 100 ceramic-on-ceramic total hip arthroplasty. As well as the technology, proposed by the authors of this work, which goes through the process on patenting for an invention. doi: 10.1016/j.triboint.2010.02.006, Giori, N. J., Ryd, L., and Carter, D. R. (1995). Additive manufactured metallic implants for orthopaedic applications. 107, 1199–1209. The main attention is paid to the analysis of the latest technologies in the field of joint arthroplasty, such as osseointegration of artificial joints, the improvement of materials with the property of osteoimmunomodulation, the improvement of joint arthroplasty technologies based on the modeling of dynamic osteosynthesis, as well as the identification of possible unconventional designs of artificial joints that contribute to these technologies, predictive assessment of areas for technologies improvement. (2000). doi: 10.1016/j.arth.2003.08.003. (2018). Lectures. doi: 10.1302/0301-620X.76B1.8300684, Shirani, A., Hu, Q., Su, Y., Joy, T., Zhu, D., and Berman, D. (2019). (2013). Alumina or zirconia ceramics can be used as an external ceramic element, and a Ti-based alloy can be used as an internal metal element, with which the head is then connected to the tapered neck of THR stem. 35, 1599–1604. Appl. 1:7. doi: 10.1016/s0883-5403(03)00341-3. Eng. doi: 10.1016/j.triboint.2019.04.027, Xu, J.-Z., Muratoglu, O. K., and Oral, E. (2019). Sci. Biarticular Anatomically Adaptable Hip Prosthesis with Fluid. Today 19, 304–321. This approach can be considered generally accepted and in many scientific studies the most significant problems characteristic of all artificial joints are not identified with a specific type of joint (see, for example, Römmelt et al., 2019; Shirani et al., 2019; Von Skrbensky et al., 2019; Yang et al., 2019; Zhang L. et al., 2019). It can be expected that a modification of this model can be successfully used to plan optimal physical effects, aimed at providing the best conditions for osteosynthesis near artificial hip joint and directly in the pores of the biomaterials from which its elements are made. Res. Relat. At the same time, it is necessary to note that new design solutions are currently being used to achieve these goals, protected by patents on invention. Biomed. However, even the most advanced artificial joint (in terms of the capabilities of modern technology) is not able to fully replace natural joint due to a number of objective reasons. Nevertheless, it can be argued that the level of modern technology and the capabilities of technological equipment make it possible to manufacture artificial joints from virtually any material and provide it with any shape. Future bearing surfaces in total hip arthroplasty. (Click) doi: 10.1016/j.medengphy.2008.07.006, Anderson, J. M., Rodriguez, A., and Chang, D. T. (2008). doi: 10.1109/ICoBE.2012.6178948, Polyakov, A., Pakhaliuk, V., Kalinin, M., Kramar, V., Kolesova, M., and Kovalenko, O. The production of porous metal biomaterials with a given structure can be implemented based on the Space Holder Method (Wen et al., 2001; Esen and Bor, 2007), Spark Plasma Sintering Method (Miyao et al., 2000; Watari et al., 2002), Microwave Sintering Method (Upadhyaya et al., 2007; Tang et al., 2013), Combustion Synthesis Method (Li et al., 2000; Ryan et al., 2006), Metal Injection Molding Method (Chen et al., 2009b), Capsule-Free Hot Isostatic Pressing Method (Zhang et al., 2007), Solid State Isothermal Foaming Technique (Nugroho et al., 2010) and other methods. (1998). J. Powder Metall. The solution to this important scientific and technical problem is primarily due to the need to ensure a decent quality of life for a large number of patients who need treatment for diseases and injuries of the joints, the number of which is constantly growing due to many reasons as social, ecological, as man-made. Therefore, couples with polyethylene are still in demand. Orthop. (2019). The reported study was funded by Russian Fund for Basic Research (grant No. Int. doi: 10.1097/00003086-198007000-00045, Brown, B. N., and Badylak, S. F. (2013). We also assume that under certain conditions, cells inducing bone growth in the desired direction can proliferate on the walls of this scaffold, which ultimately leads to resorption of the scaffold material and the formation of a new natural joint in its place. Hamburg: European Patent Office. If we further assume that the average size of metal particles is 1/10 of those for polyethylene, then the ratio of the surface area of the particles is almost the same as the loss in weight per year. The main reason for remodeling is functional and mechanical stress. Bone Joint Surg. 47, 1239–1242. Wait, M., Ealker, P., and Blunn, G. (1995). (2009). From this point of view, the artificial joint designer is in a better position than “nature,” since it does not have to fulfill the ontogenetic conditions inherent in living systems. Trans. doi: 10.1016/j.surfcoat.2009.06.010, Shanbhag, A. S., Jacobs, J. J., Giant, T. T., Gilbert, J. L., Black, J., and Galante, J. O. (1999). Orthop. (in Russian). In comparison, 5 microns of annual linear wear of a metal on metal couple the same diameter corresponds to approximately 27 mg weight loss per year. Clinical performance of a highly cross-linked polyethylene at two years in total hip arthroplasty: a randomized prospective trial. At this stage, all artificial joint elements are manufactured and assembled; tests for compliance with mechanical and toxicological indicators are performed; sterilization of the product is in progress. doi: 10.1007/978-3-319-45433-7_6, Chen, Z., Wu, C., Yuen, J., Klein, T., Crawford, R., and Xiao, Y. • Firstly, it is the problem of choosing the materials of the artificial hip joint elements that the best meet the clinical and operational requirements. Hip joint prosthesis. Here, one cannot fail to note the significant contribution to the modeling of processes of structural restructuring of bone tissue under the action of external mechanical stimuli of a periodic nature, which was made by L. B. Maslov, who developed and studied a generalized dynamic model of a changing poroelastic continuous medium and a mathematical algorithm that conceptually describes this process (Maslov, 2013). Roberts, M. (2009). doi: 10.1002/jor.1100060604, Catledge, S. A., Vaid, R., Diggins, P., Weimer, J. J., Koopman, M., and Vohra, Y. K. (2011). It can be argued that modern artificial hip joint designs are the result of a rather long period of their evolution during which solutions to a number of key problems were obtained that ensured the rapid development of THA technologies. Prof. Pedro Armisén to to deliver the keynote speech in AAME 2019. Sapphire heads implanted in 5 patients showed no complications for 5 years. But these problems are of a pronounced technological nature and, therefore, in the development of appropriate technologies can be eliminated. doi: 10.1016/j.biomaterials.2005.12.002, Scemama, C., Anract, P., Dumaine, V., Babinet, A., Courpied, J. P., and Hamadouche, M. (2017). (C) The stage of modeling and analysis of the functioning of artificial joint as part of a biotechnological system. doi: 10.1002/jbm.a.32280, Kyomoto, M., Moro, T., Konno, T., Takadama, H., Yamawaki, N., Kawaguchi, H., et al. To search for non-traditional designs of artificial joints, attention was focused on THR, where implant designs with a closed friction pair, both with lubricant placed inside and without it, were taken as the selection criterion, but the closed design should not allow releasing wear debris into the periprosthetic tissue. Porous tantalum and titanium in orthopedics: a review. Mater. This indicates that research in the field of creating new materials for elements of artificial joints couples is mostly carried out in material science laboratories that are not directly related to biomedicine, orthopedics, and the development of new biomaterials for orthopedics is a by-product of their activities. Reduced wear with oxidized zirconium femoral heads. A prospective, randomised controlled trial comparing ceramic-on-metal and metal-on-metal bearing surfaces in total hip replacement. Therefore, despite the impressive results obtained in recent years, the efforts of many researchers, scientific groups and manufacturers are aimed at creating a new generation of artificial hip joint, the use of which would significantly reduce the risk or completely eliminate the complications inherent in THA.

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