Bioactive, nanostructured <scp>S</scp>i‐substituted hydroxyapatite coatings on titanium prepared by pulsed laser deposition

Rau, Julietta V.; Cacciotti, Ilaria; Laureti, S.; Fosca, Marco; Varvaro, G.; Latini, Alessandro

doi:10.1002/jbm.b.33344

Cited by 65 publications

(40 citation statements)

References 58 publications

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“…Combining the growth mechanism of the coatings and the XRD results reported above, the prepared coating grows inwards to generate rutile TiO 2 at the coating/substrate interface (inner layer) while outwards to form amorphous oxides of V, Fe, and Ni at the coating/electrolyte interface (outer layer). The formation of the rutile TiO 2 is because the inner layer is closed to the coating/substrate interface with high temperature during the spark discharge process, leading to the slow cooling of the TiO 2 , and it is in accordance with many previous reports …”

Section: Resultssupporting

confidence: 90%

Black ceramic coatings on Ti alloy with enhanced high absorptivity and high emissivity by plasma electrolytic oxidation

Yao

Han

et al. 2019

Int J Applied Ceramic Tech

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A black ceramic coating with high absorptivity and emissivity was successfully prepared on TA7 (Ti‐5Al‐2.5Sn) in a hybrid electrolyte solution by plasma electrolytic oxidation for improving the imaging precision of optical system. The influence of electrolyte components and technical parameters on the composition, structure, and optical properties was investigated. The results show the coatings with typically porous structure are mainly composed of O, P, Si, Ti, V, Fe, and Ni. The corresponding amorhous oxide in the outer layer endows the coating with strong absorption in the visible light and infrared areas, and the crystallized TiO2 indwelling the inner layer contributes to the strong UV absorption property. In addition, the micropores of the coatings have different size ranges corresponding to the wavelengths, facilitating the increase of absorptivity and emissivity in some degree. The absorptivity and emissivity can be adjusted by electrolyte components and technical parameters. The coating presents the best absorptivity of 0.962 and emissivity of 0.950 in the electrolyte solution of 3 g/L NH4VO3, 5 g/L FeSO4, and 5 g/L C4H6O4Ni under 400 V for 10 minutes.

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Section: Resultssupporting

confidence: 90%

Black ceramic coatings on Ti alloy with enhanced high absorptivity and high emissivity by plasma electrolytic oxidation

Yao

Han

et al. 2019

Int J Applied Ceramic Tech

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“…This should be remarked on, as the improvement of PEEK surface roughness and wettability is envisioned to promote adhesion, spreading, proliferation, and differentiation of bone cells [68]. In the field of bioactive coatings, biomimetic coatings resembling the composition of natural bone apatite, which is indeed a calcium-deficient, highly-substituted, and poorly crystalline hydroxyapatite [69], are strongly desired, as they are expected to better promote differentiation implant osseointegration compared to highly-crystalline stoichiometric HA or other CaP phases [70][71][72]. Aiming to fabricate highly biomimetic coatings, bone apatite-like (BAL) thin films were deposited on titanium substrate for the first time by direct ablation of a biogenic source; i.e., a deproteinized bovine bone shaft, by making use of IJD technology [73,74].…”

Section: Bioactive Coatings and Thin Films By Pedmentioning

confidence: 99%

The Pulsed Electron Deposition Technique for Biomedical Applications: A Review

et al. 2019

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The "pulsed electron deposition" (PED) technique, in which a solid target material is ablated by a fast, high-energy electron beam, was initially developed two decades ago for the deposition of thin films of metal oxides for photovoltaics, spintronics, memories, and superconductivity, and dielectric polymer layers. Recently, PED has been proposed for use in the biomedical field for the fabrication of hard and soft coatings. The first biomedical application was the deposition of low wear zirconium oxide coatings on the bearing components in total joint replacement. Since then, several works have reported the manufacturing and characterization of coatings of hydroxyapatite, calcium phosphate substituted (CaP), biogenic CaP, bioglass, and antibacterial coatings on both hard (metallic or ceramic) and soft (plastic or elastomeric) substrates. Due to the growing interest in PED, the current maturity of the technology and the low cost compared to other commonly used physical vapor deposition techniques, the purpose of this work was to review the principles of operation, the main applications, and the future perspectives of PED technology in medicine.

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“…Calcium phosphates (CaP, eg hydroxyapatite (HAp, Ca 10 (PO 4 ) 6 (OH) 2 , Ca/P = 1.667), α‐ and β‐tricalcium phosphate (TCP, Ca 3 (PO 4 ) 2 , Ca/P = 1.500)) are widely employed in the biomedical sector, particularly in dentistry, orthopaedics and bone tissue engineering, as dental fillers, coatings for titanium dental implants, fillers in biodegradable composites, and bone substitutes for bone reconstruction and regeneration, due to their chemical similarity to the mineral component of hard tissue. Really, the biological apatites significantly differ from stoichiometric HAp, since they consist in Ca‐deficient (Ca/P < 1.667) carbonated apatites, characterised by the presence of various amounts of vicarious ions, either incorporated within the apatite lattice or just adsorbed on the crystal surface, including anionic (eg, F − , Cl − ,

{SiO}_{4}^{4 -}

and

{CO}_{3}^{2 -}

) and/or cationic substitutions (eg, Na + , Mg 2+ , K + , Sr 2+ , Zn 2+ , Ba 2+ , Al 3+ ) .…”

Section: Introductionmentioning

confidence: 99%

Multisubstituted hydroxyapatite powders and coatings: The influence of the codoping on the hydroxyapatite performances

Cacciotti

2019

Int J Applied Ceramic Tech

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The biological apatite, whose the bone and teeth mineral phases are composed, remarkably differs from stoichiometric hydroxyapatite (HAp, Ca10(PO4)6(OH)2, Ca/P = 1.667). Indeed, it consists in carbonated Ca‐deficient (Ca/P < 1.667) apatite, characterised by the presence of several vicarious ions, either incorporated within the apatite lattice or just adsorbed on the crystal surface, including anionic (eg, F−, Cl−, SiO44- and CO3=) and/or cationic substitutions (eg, Na+, Mg2+, K+, Sr2+, Zn2+, Ba2+, Al3+). For this reason, recently, a continuous and rising attention has been devoted to the ionic substitutions within the hydroxyapatite lattice in order to resemble the chemical composition of the bone mineral component and to improve its chemical, physical and mostly biological properties, for applications in biomedical sector, particularly in dentistry, orthopaedics and bone tissue engineering. The present manuscript provides a complete overview about the bi‐substituted hydroxyapatites in form of powders and coatings, in order to evidence the effect of the co‐doping with different vicarious ions within HAp lattice on its physicochemical properties, such as microstructure, morphology, thermal stability, solubility, thermal decomposition, dissolution, grain size, mechanical strength, degradation kinetics, corrosion resistance, and biological responsiveness, in terms of in vitro bioactivity, cytotoxicity and antibacterial action.

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Bioactive, nanostructured Si‐substituted hydroxyapatite coatings on titanium prepared by pulsed laser deposition

Abstract: The prepared bioactive Si-HAp coatings could be considered for applications in orthopedics and dentistry to improve the osteointegration of bone implants.

Cited by 65 publications

References 58 publications

Black ceramic coatings on Ti alloy with enhanced high absorptivity and high emissivity by plasma electrolytic oxidation

Black ceramic coatings on Ti alloy with enhanced high absorptivity and high emissivity by plasma electrolytic oxidation

The Pulsed Electron Deposition Technique for Biomedical Applications: A Review

Multisubstituted hydroxyapatite powders and coatings: The influence of the codoping on the hydroxyapatite performances

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