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KMID : 1035320180450030221
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Korean Society for Dental Materials
2018 Volume.45 No. 3 p.221 ~ p.232
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Hydroxyapatite Coatings on Titanium Using Electrochemical Deposition Method at Body Fluid Temperature
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Kim Su-Chul
Hwang Moon-Jin
Lee Woon-Young
Park Young-Jun
Song Ho-June
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Abstract
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In this study, hydroxyapatite (HAp) was coated on titanium using electrochemical deposition (ECD) method at body fluid temperature. The titanium specimens for ECD were prepared by chemically etching treatment using 5M NaOH solution. The electrolyte mixed with 5 mM Ca(NO3)2 and 2 mM NH4H2PO4 which has pH 5 (E2) was adjusted to pH 3 (E1) and pH 6 (E3). The different electric pulses of ?10, -15, -30 mA were applied to each specimen. The temperature of electrolytes was kept at 37 ℃. E1-10, E1-15, E1-30, E2-10, E2-15, E2-30, E3-10, E3-15, and E3-30 groups were prepared for this study. Scanning electron microscope (SEM) images showed that E1-10 and E1-15 groups were not coated and the powder-shaped compounds were formed on E3-15 and E3-30 groups. The cracks were observed on the surface of E1-30 and E2-30 groups. The evenly and stable coated layer was deposited on E2-10, E2-15 and E3-10 groups. The coating layer coated on titanium surface had an HAp crystalline structure. E1-30 and E2-30 groups had low crystallinity, even though they had thick layer. HAp layer on for E2-10 group was well deposited on the surface because it more aligned to c-axis compared with other groups.
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KEYWORD
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Titanium,, Surface modification, Hydroxyapatite, Electrochemical deposition
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