A super-hydrophilic coating with a macro/micro/nano triple hierarchical structure on titanium by two-step micro-arc oxidation treatment for biomedical applications

Li, Yada; Wang, Weiqiang; Duan, Jiatong; Qi, Min

doi:10.1016/j.surfcoat.2016.12.065

Cited by 28 publications

(18 citation statements)

References 50 publications

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“…High energy shot peening (HESP) pretreatment can be used to enhance the stability and bioactivity of the TiO 2 coatings fabricated by MAO, Shen et al (2020) used this method to increase the effective doping of Ca & P elements on the surfaces. Novel “cortex-like” coatings were investigated by Li et al (2017 , 2018) , they have studied a macro/micro/nano triple hierarchical structure and micro/nano dual-scale structured TiO 2 coating on Ti. Results proved that the “cortex-like” structure significantly promotes the cell adhesion, diffusion, and differentiation and increases the matrix mineralization.…”

Section: Chemical Modificationmentioning

confidence: 99%

Surface Modification Techniques of Titanium and its Alloys to Functionally Optimize Their Biomedical Properties: Thematic Review

Xue

Attarilar

Liu

et al. 2020

Front. Bioeng. Biotechnol.

134

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Depending on the requirements of specific applications, implanted materials including metals, ceramics, and polymers have been used in various disciplines of medicine. Titanium and its alloys as implant materials play a critical role in the orthopedic and dental procedures. However, they still require the utilization of surface modification technologies to not only achieve the robust osteointegration but also to increase the antibacterial properties, which can avoid the implant-related infections. This article aims to provide a summary of the latest advances in surface modification techniques, of titanium and its alloys, specifically in biomedical applications. These surface techniques include plasma spray, physical vapor deposition, sol-gel, micro-arc oxidation, etc. Moreover, the microstructure evolution is comprehensively discussed, which is followed by enhanced mechanical properties, osseointegration, antibacterial properties, and clinical outcomes. Future researches should focus on the combination of multiple methods or improving the structure and composition of the composite coating to further enhance the coating performance.

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Section: Chemical Modificationmentioning

confidence: 99%

Surface Modification Techniques of Titanium and its Alloys to Functionally Optimize Their Biomedical Properties: Thematic Review

Xue

Attarilar

Liu

et al. 2020

Front. Bioeng. Biotechnol.

134

View full text Add to dashboard Cite

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“…S2 . Besides, the micro-scale structure contributes to super hydrophilicity (Movie S1), providing a compatible platform for cell adhesion and cell proliferation [ 35 ]. The EDS results, corresponding to the selected regions in SEM, are summarized in Fig.…”

Section: Resultsmentioning

confidence: 99%

Insights into self-healing behavior and mechanism of dicalcium phosphate dihydrate coating on biomedical Mg

Dong

Zhou

Feng

et al. 2021

Bioactive Materials

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Self-healing coatings have been developed as smart surface coatings for Mg and its alloys to retain local corrosion from the coating damages. In this study, we prepared dicalcium phosphate dihydrate (DCPD) coating on biomedical Mg, and found that the artificial scratches in DCPD coating can be efficiently sealed by anti-corrosive products in both Hank's and normal saline (NS) solutions. Besides, the in-depth study revealed that DCPD was served as not only a physical barrier but also a self-healing agent, demonstrating an autonomous self-healing coating without embedded extra corrosion inhibitors. Moreover, Hank's solution provided foreign-aid film-forming ions to promote self-healing behavior. The findings might offer new opportunities for further studies and applications of efficient self-healing coatings on biodegradable Mg implants.

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“…A small contact angle value refers to good wettability as a high contact angle value indicates a poor wettability. For orthopedic and dental implant applications, a good surface hydrophilicity is necessary for adherent growth of cell and tissue and it represents a good biocompatibility [68][69][70][71]. Furthermore, this was supported by in vitro apatite-forming ability results (in Section 3.5).…”

Section: Wettability Of the Coatingsmentioning

confidence: 97%

“…Also, the average contact angle values of the coatings dependent on contacting time were given in Table 3 after the water droplet made contact with the surface. The CAG measurement is an efficient method to stay on top of the surface wettability and the surface free energy [68]. A small contact angle value refers to good wettability as a high contact angle value indicates a poor wettability.…”

Section: Wettability Of the Coatingsmentioning

confidence: 99%

Characterization, Bioactivity and Antibacterial Properties of Copper-Based TiO2 Bioceramic Coatings Fabricated on Titanium

Durdu

2018

Coatings

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The bioactive and anti-bacterial Cu-based bioceramic TiO 2 coatings have been fabricated on cp-Ti (Grade 2) by two-steps. These two-steps combine micro-arc oxidation (MAO) and physical vapor deposition-thermal evaporation (PVD-TE) techniques for dental implant applications. As a first step, all surfaces of cp-Ti substrate were coated by MAO technique in an alkaline electrolyte, consisting of Na 3 PO 4 and KOH in de-ionized water. Then, as a second step, a copper (Cu) nano-layer with 5 nm thickness was deposited on the MAO by PVD-TE technique. Phase structure, morphology, elemental amounts, thickness, roughness and wettability of the MAO and Cu-based MAO coating surfaces were characterized by XRD (powder-and TF-XRD), SEM, EDS, eddy current device, surface profilometer and contact angle goniometer, respectively. The powder-and TF-XRD spectral analyses showed that Ti, TiO 2 , anatase-TiO 2 and rutile-TiO 2 existed on the MAO and Cu-based MAO coatings' surfaces. All coatings' surfaces were porous and rough, owing to the presence of micro sparks through MAO. Furthermore, the surface morphology of Cu-based MAO was not changed. Also, the Cu-based MAO coating has more hydrophilic properties than the MAO coating. In vitro bioactivity and in vitro antibacterial properties of the coatings have been investigated by immersion in simulated body fluid (SBF) at 36.5 • C for 28 days and bacterial adhesion for gram-positive (S. aureus) and gram-negative (E. coli) bacteria, respectively. The apatite layer was formed on the MAO and Cu-based MAO surfaces at post-immersion in SBF and therefore, the bioactivity of Cu-based MAO surface was increased to the MAO surface. Also, for S. aureus and E. coli, the antibacterial properties of Cu-based MAO coatings were significantly improved compared to one of the uncoated MAO surfaces. These results suggested that Cu-based MAO coatings on cp-Ti could be a promising candidate for biomedical dental implant applications.TiO 2 -based coatings have been suggested to improve corrosion resistance, bioactivity and biocompatibility of implant surfaces. They have recently received great attention for the biomedical applications owing to their more stable chemical composition [11,12]. TiO 2 were fabricated on cp-Ti by various surface coating methods including sol-gel [13], anodic oxidation [14], magnetron sputtering [15], electrophoretic deposition [16], acid etching [17,18], laser surface treatment [19], plasma spraying [20,21] and micro arc oxidation [22][23][24][25] etc. However, certain problems like non-homogenous structure, micro-structural control problems, micro-cracks formation, the presence of phase impurity, poor adhesion strength were observed in these methods except for MAO technique [26][27][28]. Thus, implant application areas of the coatings produced by these techniques are limited.Micro-arc oxidation (MAO) is one of the most applicable methods to deposit a porous and rough bioceramic layer on valve metals such as Ti, Al, Mg, and Zr surfaces [3,[29][30][31]. The MAO coating promotes bioacti...

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A super-hydrophilic coating with a macro/micro/nano triple hierarchical structure on titanium by two-step micro-arc oxidation treatment for biomedical applications

Cited by 28 publications

References 50 publications

Surface Modification Techniques of Titanium and its Alloys to Functionally Optimize Their Biomedical Properties: Thematic Review

Surface Modification Techniques of Titanium and its Alloys to Functionally Optimize Their Biomedical Properties: Thematic Review

Insights into self-healing behavior and mechanism of dicalcium phosphate dihydrate coating on biomedical Mg

Characterization, Bioactivity and Antibacterial Properties of Copper-Based TiO2 Bioceramic Coatings Fabricated on Titanium

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