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Full-Text Articles in Medicine and Health Sciences
Structure, Wettability, Corrosion And Biocompatibility Of Nitinol Treated By Alkaline Hydrothermal And Hydrophobic Functionalization For Cardiovascular Applications, S. Rahimipour, E. Salahinejad, E. Sharifi, H. Nosrati, Lobat Tayebi
Structure, Wettability, Corrosion And Biocompatibility Of Nitinol Treated By Alkaline Hydrothermal And Hydrophobic Functionalization For Cardiovascular Applications, S. Rahimipour, E. Salahinejad, E. Sharifi, H. Nosrati, Lobat Tayebi
School of Dentistry Faculty Research and Publications
The main objective of this study is to hydrophobize nitinol (Ni-Ti alloy) for cardiovascular applications. For this purpose, medical nitinol samples were subjected to sodium hydroxide hydrothermal treatments at various temperatures, followed by hexadecyltrimethoxysilane (HDTMS) functionalization. Then, the structure, wettability, corrosion, cytocompatibility and cell adhesion of the prepared samples were evaluated. According to the results, porous blade-shaped layers of sodium titanate were formed on the substrate surface as a result of the alkaline treatment. These nano-rough features offered considerable hydrophobicity after HDTMS processing, where a maximum water contact angle of about 140° was obtained for the sample treated at 120 …
Biodegradable Magnesium Bone Implants Coated With A Novel Bioceramic Nanocomposite, Mehdi Razavi, Mohammadhossein Fathi, Omid Savabi, Lobat Tayebi, Daryoosh Vashaee
Biodegradable Magnesium Bone Implants Coated With A Novel Bioceramic Nanocomposite, Mehdi Razavi, Mohammadhossein Fathi, Omid Savabi, Lobat Tayebi, Daryoosh Vashaee
School of Dentistry Faculty Research and Publications
Magnesium (Mg) alloys are being investigated as a biodegradable metallic biomaterial because of their mechanical property profile, which is similar to the human bone. However, implants based on Mg alloys are corroded quickly in the body before the bone fracture is fully healed. Therefore, we aimed to reduce the corrosion rate of Mg using a double protective layer. We used a magnesium-aluminum-zinc alloy (AZ91) and treated its surface with micro-arc oxidation (MAO) technique to first form an intermediate layer. Next, a bioceramic nanocomposite composed of diopside, bredigite, and fluoridated hydroxyapatite (FHA) was coated on the surface of MAO treated AZ91 …