Comparison of Biocompatible Coatings Produced by Plasma Electrolytic Oxidation on cp-Ti and Ti-Zr-Nb Superelastic Alloy

Фаррахов, Р. Г.; Melnichuk, Olga; Парфенов, Е.В.; Mukaeva, V. R.; Рааб, А. Г.; Sheremetyev, V.; Zhukova, Yulia; Прокошкин, С. Д.

doi:10.3390/coatings11040401

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…The worldwide clinical demand for bone tissue repair increases every year, particularly due to the aging population [1][2][3][4]. The main metallic bone implants used in orthopedic or dental surgeries are titanium alloys [5][6][7][8][9][10], stainless steel [11][12][13][14][15], and CoCr alloys [16][17][18][19][20][21][22]. These alloys are used because they have suitable mechanical properties for bone tissue replacement and their biocompatibility with the body environment is good.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of Calcium Phosphate Coatings on Metallic Substrates for Bone Implant Applications: A Review

Drevet

Benhayoune

2022

Coatings

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This review summaries more than three decades of scientific knowledge on electrodeposition of calcium phosphate coatings. This low-temperature process aims to make the surface of metallic bone implants bioactive within a physiological environment. The first part of the review describes the reaction mechanisms that lead to the synthesis of a bioactive coating. Electrodeposition occurs in three consecutive steps that involve electrochemical reactions, pH modification, and precipitation of the calcium phosphate coating. However, the process also produces undesired dihydrogen bubbles during the deposition because of the reduction of water, the solvent of the electrolyte solution. To prevent the production of large amounts of dihydrogen bubbles, the current density value is limited during deposition. To circumvent this issue, the use of pulsed current has been proposed in recent years to replace the traditional direct current. Thanks to breaking times, dihydrogen bubbles can regularly escape from the surface of the implant, and the deposition of the calcium phosphate coating is less disturbed by the accumulation of bubbles. In addition, the pulsed current has a positive impact on the chemical composition, morphology, roughness, and mechanical properties of the electrodeposited calcium phosphate coating. Finally, the review describes one of the most interesting properties of electrodeposition, i.e., the possibility of adding ionic substituents to the calcium phosphate crystal lattice to improve the biological performance of the bone implant. Several cations and anions are reviewed from the scientific literature with a description of their biological impact on the physiological environment.

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Section: Introductionmentioning

confidence: 99%

Electrodeposition of Calcium Phosphate Coatings on Metallic Substrates for Bone Implant Applications: A Review

Drevet

Benhayoune

2022

Coatings

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“…We applied the kinetic model that contains three terms: for the metal dissolution, for 3D crystallisation of the oxides, and for the oxygen evolution. The formula's derivation is given elsewhere [24,26]:…”

Section: Estimation Of Kinetic Coefficients Of the Peo Processmentioning

confidence: 99%

Influence of PEO Electrolyzer Geometry on Current Density Distribution and Resultant Coating Properties on Zr-1Nb Alloy

Aubakirova¹,

Гундеров

Фаррахов³

et al. 2023

Materials

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This paper is devoted to the study of the current density distribution effect on plasma electrolytic oxidation process and resultant coatings on a Zr-1Nb alloy. The influence of the distance between the plates simultaneously placed into an electrolyzer was evaluated to assess the throwing power of the PEO process. The current density on the facing surfaces of the plates decreases when the distance between them shrinks. This current density has a notable impact on the resultant PEO coating in terms of the surface morphology parameters and electrochemically evaluated corrosion resistance. The influence of this effect is low on the stages of anodizing and spark discharges (60–120 s of the PEO), and significantly increases on the stage of microarc discharges (120–360 s of the PEO). The coating obtained with a smaller distance between the plates, while having the same coating thickness as the others, exhibits higher wear resistance. New correlations between the current density, diffusion coefficient, time constant of nucleation and the coating thickness in the middle of the facing samples were established; in addition, a correlation of the coating morphology in this area with the roughness parameters RPc, RSm was shown. This study contributes to the development of optimized PEO processes for the simultaneously coated several devices of complex shape, e.g., orthopedic implants.

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“…The ageing of the world's population is creating an increasing clinical demand for skeletal repair [1][2][3][4][5][6]. In particular, orthopedic and dental surgeries require metallic bone implants made of titanium alloys [7][8][9][10][11][12][13][14][15][16], steels and iron-based alloys [17][18][19][20][21], or CoCr alloys [22][23][24][25][26][27][28]. The mechanical properties of these alloys are appropriate for load-bearing applications, and they are biocompatible with the body environment.…”

Section: Introductionmentioning

confidence: 99%

Bioactive Calcium Phosphate Coatings for Bone Implant Applications: A Review

2023

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This review deals with the design of bioactive calcium phosphate coatings deposited on metallic substrates to produce bone implants. The bioceramic coating properties are used to create a strong bonding between the bone implants and the surrounding bone tissue. They provide a fast response after implantation and increase the lifespan of the implant in the body environment. The first part of the article describes the different compounds belonging to the calcium phosphate family and their main properties for applications in biomaterials science. The calcium-to-phosphorus atomic ratio (Ca/P)at. and the solubility (Ks) of these compounds define their behavior in a physiological environment. Hydroxyapatite is the gold standard among calcium phosphate materials, but other chemical compositions/stoichiometries have also been studied for their interesting properties. The second part reviews the most common deposition processes to produce bioactive calcium phosphate coatings for bone implant applications. The last part describes key physicochemical properties of calcium phosphate coatings and their impact on the bioactivity and performance of bone implants in a physiological environment.

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Comparison of Biocompatible Coatings Produced by Plasma Electrolytic Oxidation on cp-Ti and Ti-Zr-Nb Superelastic Alloy

Cited by 12 publications

References 52 publications

Electrodeposition of Calcium Phosphate Coatings on Metallic Substrates for Bone Implant Applications: A Review

Electrodeposition of Calcium Phosphate Coatings on Metallic Substrates for Bone Implant Applications: A Review

Influence of PEO Electrolyzer Geometry on Current Density Distribution and Resultant Coating Properties on Zr-1Nb Alloy

Bioactive Calcium Phosphate Coatings for Bone Implant Applications: A Review

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