Surface changes of yttria‐stabilized zirconia in water and Hanks solution characterized using XPS

Abstract

Adhesion of soft and hard tissues to yttria-stabilized zirconia (YSZ) has been reported, despite its chemical inertness. To investigate the underlying mechanism of adhesion of hard and soft tissues to YSZ in dental implants, YSZ disks with (100), (110), and (111) crystalline planes were immersed in water for 60 days and in Hanks solution for 7 days, and the changes in the surface chemical states were characterized using X-ray photoelectron spectroscopy. After immersion in water for 60 days, the concentration of hydroxyl groups on the YSZ surface increased. Therefore, the surface of YSZ was hydrated during immersion in water. In addition, phosphate groups were formed on the surface of YSZ immersed in Hanks solution. We conclude that the formation of phosphate on the YSZ surface in physiological conditions can promote reaction with the surrounding tissues.

Surface characterization of commercially available yttria-stabilized tetragonal zirconia polycrystalline in water and Hanks’ solution using X-ray photoelectron spectroscopy

“…Hence, the reactivity of the Y-TZP surface may play an important role for tissue adhesion in human body. Such results were also demonstrated in single crystalline yttria-stabilized zirconia 10) . Based on the findings in Y-TZP reactivity to the water molecules and electrolytes in Hanks' solution, further studies are required for cell activities.…”

“…In addition, phosphate ions were incorporated into the surface and formed a phosphate, probably zirconium phosphate, on all YSZs without any reaction of calcium ions. Thus, the (110) plane was the preferential reaction site in YSZ 10) .…”

Glucose Isomerization to Fructose Catalyzed by MgZr Mixed Oxides in Aqueous Solution

“…Figure 5 shows the XPS spectra of the electronic binding energies of Zr 3d, Mg 1s and O 1s for ZrO 2 , MgO and Mg/Zr-1.0. It can be observed that Zr and Mg in Mg/Zr-1.0 exist in the Zr 4+ oxidation state (181.78 and 183.98 eV) (Figure 5a) and Mg 2+ oxidation state (1304.18 eV) (Figure 5b), respectively [31]. The O 1s signal of Mg/Zr-1.0 is deconvoluted into three components: the Mg-O (530.0 eV), Mg-OH (530.7 eV), and H 2 O (533.4 eV) [32,33].…”

Simple Preparation of Yttria‐Stabilized Zirconia Powders by Plasma Discharge Electrolysis in Nitrate Solution

“…[47] Peaks at 532 and 533.2 eV mean the presence of OH À and H 2 O, respectively, which further indicates that the product is hydroxide with water. [48] Meanwhile, the peak of 533.2 eV also indicates the possibility of the presence of C─O compound impurities. [49] The thermal decomposition process of green powders was characterized by the TG curve.…”