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TiNi alloys are very widely used materials in implant fabrication. When applied in rib replacement, they are required to be manufactured as combined porous-monolithic structures, ideally with a thin, porous part well-adhered to its monolithic substrate. Additionally, good biocompatibility, high corrosion resistance and mechanical durability are also highly demanded. So far, all these parameters have not been achieved in one material, which is why an active search in the field is still underway. In the present study, we prepared new porous-monolithic TiNi materials by sintering a TiNi powder (0-100 µm) on monolithic TiNi plates, followed by surface modification with a high-current pulsed electron beam. The obtained materials were evaluated by a set of surface and phase analysis methods, after which their corrosion resistance and biocompatibility (hemolysis, cytotoxicity, and cell viability) were evaluated. Finally, cell growth tests were conducted. In comparison with flat TiNi monoliths, the newly developed materials were found to have better corrosion resistance, also demonstrating good biocompatibility and potential for cell growth on their surface. Thus, the newly developed porous-on-monolith TiNi materials with different surface porosity and morphology showed promise as potential new-generation implants for use in rib endoprostheses.
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http://dx.doi.org/10.3390/jfb14050277 | DOI Listing |
Materials (Basel)
December 2024
School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
Ti6Al4V/Inconel 718 composites were prepared using arc additive manufacturing technology at different deposition currents. The properties of the composites directly influence the performance of the gradient materials, while heat input further affects the composites' properties. The results indicate that at a deposition current of 35 A, Ti elements diffuse into the Inconel 718 alloy.
View Article and Find Full Text PDFPhys Chem Chem Phys
December 2024
Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China.
The electrochemical reduction of N to NH (NRR) is challenging due to the lack of efficient catalysts under mild conditions. We constructed a series of 3d-transition-metal (3d-TM)-embedded asymmetric 2D MXene HMoCF with one H or F vacancy (H or F) based on first-principles calculation. Due to the strong steric effect of the surface-covered H or F terminals, N is favored to be adsorbed on H or F through the end-on mode rather than the side-on mode.
View Article and Find Full Text PDFDent Mater J
December 2024
Department of Orthodontics, Nihon University School of Dentistry.
J Neurooncol
November 2024
Radiation Oncology, Policlinico Umberto I, Department of Radiological, Oncological and Pathological Sciences, "Sapienza" University of Rome, Rome, Italy.
Background And Aim: Elevated lactate dehydrogenase (LDH), a marker of tumor aggressiveness and metabolic alterations, may predict treatment response and overall survival across various tumors. This study investigates the correlation between serum LDH levels and clinical outcomes in glioblastoma patients treated with radiotherapy (RT) and temozolomide (TMZ).
Materials And Methods: This retrospective study analysed patients with IDH wild-type glioblastoma (IDH-wt GB) treated at the Radiotherapy Department of Azienda Ospedaliero-Universitaria Senese from 2018 to 2023.
J Phys Condens Matter
November 2024
Department of Electronic Science and Engineering, Tianjin Key Laboratory of Efficient Utilization of Solar Energy, Engineering Research Center of Thin Film Optoelectronics Technology (Ministry of Education), Nankai University, Tianjin 300350, People's Republic of China.
Realizing novel two-dimensional (2D) magnetic states would accelerate the development of advanced spintronic devices and the understandings of 2D magnetic physics. In this paper, we have examined the magnetic and electronic properties of 20 dynamically stable and exfoliable MXO (M = Ti-Ni; X = S-Te; excluding CoTeO). It has been unveiled that [XO]-and [M]-crystal fields govern the M-3orbital splittings in MXO.
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