Hydroxyapatite/sodium alginate coatings electrophoretically deposited on titanium substrates: microstructure and properties

Moskalewicz, T.; Warcaba, Maciej; Cieniek, Łukasz; Sitarz, Maciej; Gajewska, Marta; Boccaccını, Aldo R.

doi:10.1016/j.apsusc.2020.148353

Cited by 34 publications

(44 citation statements)

References 69 publications

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“…Alginate hydrogel can be developed as a promising scaffold for dental-derived stem cells with a high capacity for osteo-differentiation and adipo-differentiation in vitro [ 90 ]. However, pure alginate exhibits low cell adhesion and poor mechanical properties [ 91 ]. Bioactive glass containing Zinc and Magnesium was incorporated into alginate networks to improve antibacterial and biological activity, as well as mechanical properties [ 86 ].…”

Section: Biopolymers Hybrid Particles Used In Dentistrymentioning

confidence: 99%

Biopolymers Hybrid Particles Used in Dentistry

Chen

Lee

Huang

2021

Gels

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This literature review provides an overview of the fabrication and application of biopolymer hybrid particles in dentistry. A total of 95 articles have been included in this review. In the review paper, the common inorganic particles and biopolymers used in dentistry are discussed in general, and detailed examples of inorganic particles (i.e., hydroxyapatite, calcium phosphate, and bioactive glass) and biopolymers such as collagen, gelatin, and chitosan have been drawn from the scientific literature and practical work. Among the included studies, calcium phosphate including hydroxyapatite is the most widely applied for inorganic particles used in dentistry, but bioactive glass is more applicable and multifunctional than hydroxyapatite and is currently used in clinical practice. Today, biopolymer hybrid particles are receiving more attention as novel materials for several applications in dentistry, such as drug delivery systems, bone repair, and periodontal regeneration surgery. The literature published on the biopolymer gel-assisted synthesis of inorganic particles for dentistry is somewhat limited, and therefore, this article focuses on reviewing and discussing the biopolymer hybrid particles used in dentistry.

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Section: Biopolymers Hybrid Particles Used In Dentistrymentioning

confidence: 99%

Biopolymers Hybrid Particles Used in Dentistry

Chen

Lee

Huang

2021

Gels

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“…[17][18][19] A beneficial technique for the deposition of alginate coatings on conducting materials is electrophoretic deposition (EPD). [15,17,18,[20][21][22] In this process, charged particles dispersed in the dispersion phase move to a conductive substrate of opposite charge under the electric field to obtain a coating. [17,21,23] EPD has many advantages, such as room temperature processing, a short deposition time and uncomplicated control of process parameters.…”

Section: Introductionmentioning

confidence: 99%

“…However, the adhesion of the coatings to the alloy was not considered in that work. Sodium alginate has been widely used as the matrix of composite coatings electrophoretically deposited on titanium substrates, [20] titanium alloy substrates, [24] stainless steel substrates [17,18] or magnesium alloy substrates. [25] Those papers describe the EPD route of composite coatings and selected properties.…”

Section: Introductionmentioning

confidence: 99%

“…[25] Those papers describe the EPD route of composite coatings and selected properties. In our previous work, [20] we used the sodium alginate (SA) concentration of 4 g/L in the suspension as well as different concentrations of hydroxyapatite (HA) particles and the volume ratio of distilled water to ethanol 60/40 to avoid hydrogen evolution during the process. It was found that the homogeneity of the fabricated coatings depended largely on the chemical composition of the suspension, whereas their adhesion depended significantly on the surface substrate preparation.…”

Section: Introductionmentioning

confidence: 99%

“…However, these papers contain little information about the adhesion of coatings to metallic substrates and no information about the influence of the substrate preparation before the deposition on the coating adhesion. It is well known [20,[25][26][27][28][29][30][31] that the adhesion of the coating to an underlying material is beneficial from the application point of view of the coated material. It decides on the durability of the coating/substrate system and is highly dependent on the surface condition of the base material.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Surface Topography, Chemistry and Properties on the Adhesion of Sodium Alginate Coatings Electrophoretically Deposited on Titanium Biomaterials

Warcaba

Kowalski

Kopia

et al. 2021

Metall Mater Trans A

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In this paper, we report on the electrophoretic deposition and characterisation of pure sodium alginate coatings on titanium biomaterials, the commercially pure titanium CP-Ti1 and Ti–13Nb–13Zr titanium alloy. Various solutions differing in the distilled water to ethanol volume ratio and sodium alginate concentration were used for coating deposition. Uniform, dense and continuous coatings with a thickness up to 1 µm were deposited. The effect of surface topography and morphology, wettability and surface free energy as well as surface chemistry on the coating adhesion to the titanium biomaterials were investigated. The coatings exhibited very good adhesion to the polished and then chemically treated alloy. The adhesion mechanisms were identified. The chemical bonding and interfacial adhesion mechanisms are plausible. The coatings exhibited low surface development, dependent on the applied substrate roughness. Sodium alginate coatings on both substrates showed moderate hydrophilicity and relatively high surface free energy, on average 30 pct higher in comparison with that of the substrate materials. The obtained results will be useful for the further development of composite sodium alginate coatings for enhancing the biological performance of titanium biomaterials.

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Enhancing Biocompatibility and Antibacterial Activity of Ti6Al4V by Entrapping Ag and Hydroxyapatite Inside Alginate Filled Pores of TiO₂ Layer Grown by Spark Anodizing

Pupillo

Zaffora

Franco

et al. 2022

Adv Materials Inter

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reliable, such as high corrosion resistance and mechanical strength, biocompatibility, and good osteointegration to avoid revision surgery. [1] Based on these characteristics, metals and metallic alloys are used as implants for load-bearing applications. Among many others, Co-Cr alloys, stainless steels, Ti, and Ti alloys are widely used for several biomedical applications. In particular, Ti and its alloys have elastic moduli close to those of bones and lower density with respect to that of Co-Cr alloys and stainless steels. [2,3] Furthermore, compared to pure Ti, Ti alloys have higher mechanical properties that make them particularly suitable for orthopedic and traumatology implants. However, Ti and Ti alloys are considered bioinert materials, i.e., they do not react (chemically or biologically) with surrounding tissues in the human body. [4] Moreover, corrosion phenomena involving Ti alloy, namely Ti6Al4V alloy, can lead to the release of Al and V alloys that are considered hazardous elements for human body.In order to promote osteointegration of implants with existing human bone tissue, thus to optimize the integration of the device, coatings growth on implant surface can be a suitable way. In particular, for Ti and Ti Alloys, spark anodizing can represent a suitable technique to grow strongly adherent porous ceramic coatings to the substrate, minimizing possible spalling phenomena that can be the cause of osteolysis.In this context, several strategies have been investigated to enhance the bioactivity of Ti alloys and thus their osteointegration. [5][6][7] It is well documented in literature that the presence of hydroxyapatite (HA, Ca 10 (PO 4 ) 6 (OH) 2 ) can enhance the osteointegration of foreign biomaterials due to its high biocompatibility with hard and soft tissues. [8] Therefore, inducing the incorporation or the growth of HA has been revealed as a good strategy to improve the materials bioactivity. This can be reached, for instance, by an electrochemical conversion coating process as spark anodizing by precisely tailoring the operating conditions (formation voltage, electrolyte bath composition, etc.). [3,9,10] Moreover, the growth of a thick anodic layer on the surface of Ti6Al4V alloy can enhance its corrosion resistance A three-step electrochemical process is developed to grow a coating on Ti6Al4V alloy for biomedical applications aimed to enhance its bioactivity. The coating is composed by a porous titanium oxide filled with Ag, alginic acid, and hydroxyapatite to provide antibacterial properties and, at the same time, osteointegration capability. Anodized and treated with the electrochemical process samples are characterized by Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDX), X-Ray Diffraction, and Raman Spectroscopy to have information about morphology and composition soon after the fabrication and after immersion in Hanks' solution. Bioactivity of the samples is also proved by electrochemical tests through Electrochemical Impedance Spectroscopy (EIS) measurements. ...

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Hydroxyapatite/sodium alginate coatings electrophoretically deposited on titanium substrates: microstructure and properties

Cited by 34 publications

References 69 publications

Biopolymers Hybrid Particles Used in Dentistry

Biopolymers Hybrid Particles Used in Dentistry

Impact of Surface Topography, Chemistry and Properties on the Adhesion of Sodium Alginate Coatings Electrophoretically Deposited on Titanium Biomaterials

Enhancing Biocompatibility and Antibacterial Activity of Ti6Al4V by Entrapping Ag and Hydroxyapatite Inside Alginate Filled Pores of TiO₂ Layer Grown by Spark Anodizing

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Hydroxyapatite/sodium alginate coatings electrophoretically deposited on titanium substrates: microstructure and properties

Cited by 34 publications

References 69 publications

Biopolymers Hybrid Particles Used in Dentistry

Biopolymers Hybrid Particles Used in Dentistry

Impact of Surface Topography, Chemistry and Properties on the Adhesion of Sodium Alginate Coatings Electrophoretically Deposited on Titanium Biomaterials

Enhancing Biocompatibility and Antibacterial Activity of Ti6Al4V by Entrapping Ag and Hydroxyapatite Inside Alginate Filled Pores of TiO2 Layer Grown by Spark Anodizing

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Enhancing Biocompatibility and Antibacterial Activity of Ti6Al4V by Entrapping Ag and Hydroxyapatite Inside Alginate Filled Pores of TiO₂ Layer Grown by Spark Anodizing