Novel fluoridated hydroxyapatite/MAO composite coating on AZ31B magnesium alloy for biomedical application

Yu, Wentao; Sun, Ruixue; Guo, Ziqiang; Wang, Zhiyuan; He, Yong; Lu, Guangyi; Chen, Panyu; Chen, Kezheng

doi:10.1016/j.apsusc.2018.09.148

Cited by 86 publications

(20 citation statements)

References 45 publications

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“…For example, electrochemical anodic oxidation has been utilized to initiate thick and uniform metal oxide layers [36]. Building a coating with a MAO inner layer and a HAp outer layer can enhance corrosion and improve bioactivity and bonding strength in Mg alloys [94]. A recent study of only microarc oxidation pretreatment examined the relationship between porosity, thickness, microhardness, and surface morphology as a function of microarc parameters [95].…”

Section: Discussionmentioning

confidence: 99%

Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Huynh

Ngo

Golden

2019

International Journal of Biomaterials

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To improve the biocompatibility of medical implants, a chemical composition of bone-like material (e.g., hydroxyapatite) can be deposited on the surface of various substrates. When hydroxyapatite is deposited on surfaces of orthopedic implants, several parameters must be addressed including the need of rapid bone ingrowth, high mechanical stability, corrosion resistance, biocompatibility, and osseointegration induction. However, the deposition process can fail due to poor adhesion of the hydroxyapatite coating to the metallic substrate. Increasing adhesion by enhancing chemical bonding and minimizing biocoating degradation can be achieved through surface activation and pretreatment techniques. Surface activation can increase the adhesion of the biocoating to implants, providing protection in the biological environment and restricting the leaching of metal ions in vivo. This review covers the main surface activation and pretreatment techniques for substrates such as titanium and its alloys, stainless steel, magnesium alloys, and CoCrMo alloys. Alkaline, acidic, and anodizing techniques and their effects on bioapatite deposition are discussed for each of the substrates. Other chemical treatment and combination techniques are covered when used for certain materials. For titanium, the surface pretreatments improve the thickness of the TiO2 passive layer, improving adhesion and bonding of the hydroxyapatite coating. To reduce corrosion and wear rates on the surface of stainless steel, different surface modifications enhance the bonding between the bioapatite coatings and the substrate. The use of surface modifications also improves the morphology of hydroxyapatite coatings on magnesium surfaces and limits the concentration of magnesium ions released into the body. Surface treatment of CoCrMo alloys also decreased the concentration of harmful ions released in vivo. The literature covered in this review is for pretreated surfaces which then undergo deposition of hydroxyapatite using electrodeposition or other wet deposition techniques and mainly limited to the years 2000-2019.

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Section: Discussionmentioning

confidence: 99%

Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Huynh

Ngo

Golden

2019

International Journal of Biomaterials

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“…Hydroxyapatite (HA) is an ideal implant coating material because its chemical composition and properties are similar to the main inorganic components of human bone and teeth. HA coating on the surface of Mg alloys has the following advantages: reducing the degradation rate of Mg alloys and improving the biological activity of Mg alloys [ 5 ]; having excellent bone conductivity and biological activity, and then quickly fusing with host bone tissue [ 6 ]; and biodegradable, with the ability of bone induction and bone conduction, which is beneficial for orthopedic applications [ 7 ]. However, the shortcomings of HA coating, such as high brittleness and low strength, make it difficult to be applied to the load-bearing parts.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on Development of Hydroxyapatite Coating on Biodegradable Magnesium Alloys: A Review

et al. 2021

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The wide application of magnesium alloys as biodegradable implant materials is limited because of their fast degradation rate. Hydroxyapatite (HA) coating can reduce the degradation rate of Mg alloys and improve the biological activity of Mg alloys, and has the ability of bone induction and bone conduction. The preparation of HA coating on the surface of degradable Mg alloys can improve the existing problems, to a certain extent. This paper reviewed different preparation methods of HA coatings on biodegradable Mg alloys, and their effects on magnesium alloys’ degradation, biocompatibility, and osteogenic properties. However, no coating prepared can meet the above requirements. There was a lack of systematic research on the degradation of coating samples in vivo, and the osteogenic performance. Therefore, future research can focus on combining existing coating preparation technology and complementary advantages to develop new coating preparation techniques, to obtain more balanced coatings. Second, further study on the metabolic mechanism of HA-coated Mg alloys in vivo can help to predict its degradation behavior, and finally achieve controllable degradation, and further promote the study of the osteogenic effect of HA-coated Mg alloys in vivo.

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“…For example, in automotive applicants, low-temperature components like brackets, covers, cases of modern automotive are made of magnesium alloys [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. In biomedical applications, bioimplants, which are devices that replace the affected or damaged part of the human body and assist in the normal functioning of the human body with a high degree of physiological acceptance, were made by magnesium alloys [ 8 , 9 , 10 , 11 ]. For example, Amerinatanzi et al performed a prediction of the biodegradation of magnesium alloy implants [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Material Model Development of Magnesium Alloy and Its Strength Evaluation

Huang

et al. 2021

Materials

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A new material model of magnesium alloys, combining both Hill’48 yield function and Cazacu’06 yield function, was developed and programmed into LS-DYNA using user subroutine, in which both slip dominant and twinning/untwinning dominant hardening phenomena were included. First, a cyclic load test was performed, and its finite element analysis was carried out to verify the new material model. Then, the deformation behaviors of the magnesium crash box subjected to the compressive impact loading were investigated using the developed material model. Compared with the experimental results, the new material model accurately predicted the deformation characteristics of magnesium alloy parts. Additionally, the effect of the thickness distribution, initial deflection and contact friction coefficient in simulation models on deformation behaviors were investigated using this validated material model.

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Novel fluoridated hydroxyapatite/MAO composite coating on AZ31B magnesium alloy for biomedical application

Cited by 86 publications

References 45 publications

Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Recent Advances on Development of Hydroxyapatite Coating on Biodegradable Magnesium Alloys: A Review

Material Model Development of Magnesium Alloy and Its Strength Evaluation

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