Korean J Dent Mater.  2022 Jun;49(2):63-76. 10.14815/kjdm.2022.49.2.63.

Surface characteristics of plasma electrolytic oxidized Ti-mesh for dental use

Affiliations
  • 1dvanced Functional Surface & Biomaterials Research Lab, Department of Dental Materials & Research Center of Surface Control for Oral Tissue Regeneration (BRL Center of NRF), College of Dentistry, Chosun University, Republic of Korea, Gwangju, Republic of Korea
  • 2Department of Periodontology, College of Dentistry, Chosun University, Republic of Korea, Gwangju, Republic of Korea

Abstract

In this study, surface characteristics of plasma electrolytic oxidized Ti-mesh for dental use were studied using various experimental instruments. The titanium mesh was used as a substrate for PEO. Using a pulsed DC power supply, PEO treatment was carried out at 280 V for 3 min in the electrolytic solution containing Ca, Mg, and P ions. And the electrolyte used for PEO was prepared by mixing with Ca(CH 3COO)2·H 2O, C 3H 7CaO 6P, and (CH 3COO) 2Mg·4H 2O. The PEO-treated surface was observed by using X-ray diffraction, field-emission scanning electron microscope, energy dispersive X-ray spectroscopy, atomic force microscopy (AFM), and nanoindentation tester. PEO-treated Ti-mesh in solution containing Ca, Mg, and P ions (CaMgP) sample showed the active spark discharge reaction compared to in solution containing Ca and P ions (CaP) sample. In CaP and CaMgP samples, the PEO surface of Ti-mesh showed mainly circular, irregular, and oval shapes of pores. In the case of CaMgP, the defects and precipitates such as MgO were formed on the surface. On the sample surface, the distribution of the desired element was detected homogeneously. The PEO-treated CaP and CaMgP specimens were mainly composed of anatase, Mg, and hydroxyapatite. From the AFM result, the average roughness was 0.247 µm for CaP and 0.226 µm for CaMgP, respectively. The hardness of CaMgP containing Mg ions was increased compared to CaP containing without Mg ions, also, the elastic modulus of CaMgP sample was higher than that of CaP sample.

Keyword

Plasma electrolytic oxidation; Micro-pore formation; Hydroxyapatite; Magnesium; Titanium mesh
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