Functionalizing Ti-Surfaces through the EPD of Hydroxyapatite/NanoY₂O₃

Abstract

Ceramic materials for skeletal repair and reconstruc-tion are expanding to a number of different applications. Present research is addressing new compositions and performances to promote osseo-integration through metal coatings. Nanotechnology plays a key role in this research because nanostructures can be introduced into implants to functionalize them and/or to enhance their properties, such as the thermal or mechanical response. In this work, the insertion of Y2O3 nanoparticles into a hydroxyapatite (HA) coating of Ti using colloidal processing technology was developed. The suspensions of HA and Y2O3 nanoparticles were formulated with a focus on zeta potential, particle size distribution, nd viscosity for the codeposition of both phases by electrophoresis. The microstructure of the nanocomposite coating was optimized by adjusting the main parameters of the electrophoretic deposition process. A threshold value of the applied electric field for the composite shaping was identified. The results demonstrate that the Y2O3 nanoparticles are homogeneously distributed in the coating and decrease in concentration as the distance from the substrate increases. As a consequence of the presence of the Y2O3, delays in the HA thermal decomposition and the improvement of metal−ceramic joining were observed.

Synthesis and characterization of Zn-Doped hydroxyapatite: scaffold application, antibacterial and bioactivity studies

“…But with the implant materials having antimicrobial activity within their structures, this setback will be eliminated. To address these problems, materials such as polyethylene [8], Al 2 O 3 [9], TiO 2 [10], Y 2 O 3 [11] and carbon nanotubes [12] have been used to improve the mechanical properties of HAp. However, the micro-structural impact of the reinforcements on HAp is a major concern also, as its effect could weaken the biological property of HAp thus resulting in undesirable effects on the tissues [13].…”

The Effect of Ca2+ and Mg2+ Ions Loaded at Degradable PLA Membranes on the Proliferation and Osteoinduction of MSCs

“…After that the suspension was milled for 45 min with nylon balls to fully disperse and stabilize the Mg particles by breaking soft agglomerates and adsorbing PEI [47]. Similarly, HA colloidal suspensions were also formulated in deionized water at pH 8 and 1 wt.% of PEI, and milling for 60 min with zirconia balls [48].…”

Ti İmplantların Biyofilim Engelleme Amaçlı Nano hBN - HA ile Kaplanmasının Yüzey Karaktersitiğine Etkisinin Belirlenmesi

“…EPD kaplamanın kurulumda basitlik, düşük ekipman maliyeti, karmaşık şekil, birikim kalınlığının kontrolü kabiliyeti bulunmaktadır [7][8]. Birçok araştırmada HA kompozit kaplama Ag/Kitosan [9], TiO2 [10], CNT [11], Al203 [12], ZrO2 [13], Kitosan [14] MWNT [15], nanoY2O3 [16] [20][21]. Benzer örnekler ortopedik implant uygulamalarında ve farklı bakteriler içinde gösterilmiştir [22].…”