Formation Mechanism and Biological Properties of Different Structured HA/TiO2 Coatings on Titanium Prepared by Micro-Arc Oxidation

2019 ◽  
Vol 8 (11) ◽  
pp. N186-N195 ◽  
Author(s):  
Xiaolin Wang ◽  
Baoe Li ◽  
Shimin Liu
Keyword(s):  
Formation Mechanism ◽  
Biological Properties ◽  
Micro Arc Oxidation ◽  
Tio2 Coatings

A study of the physical, chemical and biological properties of TiO2 coatings produced by micro-arc oxidation in a Ca–P-based electrolyte

2014 ◽  
Vol 25 (7) ◽  
pp. 1769-1780 ◽  
Author(s):  
Amanda dos Santos ◽  
Joyce R. Araujo ◽  
Sandra M. Landi ◽  
Alexei Kuznetsov ◽  
José M. Granjeiro ◽  
...  
Keyword(s):  
Biological Properties ◽  
Physical Chemical ◽  
Micro Arc Oxidation ◽  
Tio2 Coatings

scholarly journals Amorphous–Crystalline Calcium Phosphate Coating Promotes In Vitro Growth of Tumor-Derived Jurkat T Cells Activated by Anti-CD2/CD3/CD28 Antibodies

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3693
Author(s):  
Yurii P. Sharkeev ◽  
Ekaterina G. Komarova ◽  
Valentina V. Chebodaeva ◽  
Mariya B. Sedelnikova ◽  
Aleksandr M. Zakharenko ◽  
...  
Keyword(s):  
T Cells ◽  
Calcium Phosphate ◽  
Biological Effects ◽  
Electrical Potential ◽  
Biological Properties ◽  
Modern Trend ◽  
Calcium Phosphate Coating ◽  
Jurkat T Cells ◽  
Micro Arc Oxidation

A modern trend in traumatology, orthopedics, and implantology is the development of materials and coatings with an amorphous–crystalline structure that exhibits excellent biocopatibility. The structure and physico–chemical and biological properties of calcium phosphate (CaP) coatings deposited on Ti plates using the micro-arc oxidation (MAO) method under different voltages (200, 250, and 300 V) were studied. Amorphous, nanocrystalline, and microcrystalline statesof CaHPO4 and β-Ca2P2O7were observed in the coatings using TEM and XRD. The increase in MAO voltage resulted in augmentation of the surface roughness Ra from 2.5 to 6.5 µm, mass from 10 to 25 mg, thickness from 50 to 105 µm, and Ca/P ratio from 0.3 to 0.6. The electrical potential (EP) of the CaP coatings changed from −456 to −535 mV, while the zeta potential (ZP) decreased from −53 to −40 mV following an increase in the values of the MAO voltage. Numerous correlations of physical and chemical indices of CaP coatings were estimated. A decrease in the ZP magnitudes of CaP coatings deposited at 200–250 V was strongly associated with elevated hTERT expression in tumor-derived Jurkat T cells preliminarily activated with anti-CD2/CD3/CD28 antibodies and then contacted in vitro with CaP-coated samples for 14 days. In turn, in vitro survival of CD4+ subsets was enhanced, with proinflammatory cytokine secretion of activated Jurkat T cells. Thus, the applied MAO voltage allowed the regulation of the physicochemical properties of amorphous–crystalline CaP-coatings on Ti substrates to a certain extent. This method may be used as a technological mechanism to trigger the behavior of cells through contact with micro-arc CaP coatings. The possible role of negative ZP and Ca2+ as effectors of the biological effects of amorphous–crystalline CaP coatings is discussed. Micro-arc CaP coatings should be carefully tested to determine their suitability for use in patients with chronic lymphoid malignancies.

Preparation and formation mechanism of copper incorporated micro-arc oxidation coatings developed on Ti-6Al-4V alloys

2019 ◽  
Vol 375 ◽  
pp. 74-85 ◽  
Author(s):  
Guoqiang Li ◽  
Yaping Wang ◽  
Liping Qiao ◽  
Rongfang Zhao ◽  
Shufang Zhang ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Micro Arc Oxidation

Synthesis and antibacterial property of Ag-containing TiO2 coatings by combining magnetron sputtering with micro-arc oxidation

2013 ◽  
Vol 235 ◽  
pp. 748-754 ◽  
Author(s):  
Xiangyu Zhang ◽  
Ruiqiang Hang ◽  
Haibo Wu ◽  
Xiaobo Huang ◽  
Yong Ma ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Antibacterial Property ◽  
Micro Arc Oxidation ◽  
Tio2 Coatings

scholarly journals Surface Modification of Mg0.8Ca Alloy via Wollastonite Micro-Arc Coatings: Significant Improvement in Corrosion Resistance

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 754
Author(s):  
Mariya B. Sedelnikova ◽  
Anna V. Ugodchikova ◽  
Tatiana V. Tolkacheva ◽  
Valentina V. Chebodaeva ◽  
Ivan A. Cluklhov ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Current ◽  
Biological Properties ◽  
Mineralization Process ◽  
Corrosion Properties ◽  
Oxidation Method ◽  
Significant Difference ◽  
Structure Phase ◽  
Micro Arc Oxidation ◽  
Calcium Silicates

Biodegradable materials are currently attracting the attention of scientists as materials for implants in reconstructive medicine. At the same time, ceramics based on calcium silicates are promising materials for bone recovery, because Ca2+ and Si2+ ions are necessary for the mineralization process, and they take an active part in the formation of apatite. In the presented research, the protective silicate biocoatings on a Mg0.8Ca alloy were formed by means of the micro-arc oxidation method, and the study of their morphology, structure, phase composition, corrosion, and biological properties was carried out. Elongated crystals and pores were uniformly distributed over the surface of the coatings. The coated samples exhibited remarkable anti-corrosion properties in comparison with bare magnesium alloy because their corrosion current decreased 10 times, and their corrosion resistance increased almost 100 times. The coatings did not significantly affect the viability of the cells, even without the additional dilution of the extract, and were non-toxic according to ISO 10993-5: 2009. In this case, there was a significant difference in toxicity of the pure Mg0.8Ca alloy and the coated samples. Thus, the results demonstrated that the applied coatings significantly reduced the toxicity of the alloy.

Influence of Voltage on the Biological Performance of Micro-Arc Oxide Films Based on TC4 Titanium Alloy

2016 ◽  
Vol 697 ◽  
pp. 612-616
Author(s):  
Ji Kang Yan ◽  
Yuan Teng ◽  
Er Xin Ni ◽  
Yun Feng Wu ◽  
Yan Hua Sun ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Bone Tissue ◽  
Bone Cells ◽  
Porous Ceramic ◽  
Animal Experiments ◽  
Oxide Films ◽  
Biological Properties ◽  
Ceramic Surface ◽  
Tc4 Titanium Alloy ◽  
Micro Arc Oxidation

The porous ceramic biologic films were prepared on the surface of Ti6Al4V (TC4) with micro-arc oxidation technology (MAO). The phase composition, microstructure and valence state of micro-arc oxide films were studied. The biological properties of the ceramic film were comprehensive evaluated through animal experiments. Results show that with increasing of the micro-arc oxidation voltage, the better biocompatible hydroxyapatite appears on the surface of titanium alloy (TC4). The high voltage promotes the surface pore size enlarge. The porous ceramic surface makes bone tissue early grow up. Pathological sections of bone tissue 24 w animal experiments indicates that the implants can form good biological combination with bone, no rejection and the higher the micro-arc oxidation voltage, the more new bone cells.

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