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Open AccessArticle

Electrophoretic Deposition as a New Bioactive Glass Coating Process for Orthodontic Stainless Steel

1
Division of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Health Sciences University of Hokkaido, Hokkaido 061-0293, Japan
2
Division of Biomaterials and Bioengineering, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Ishikari-Tobetsu, Hokkaido 061-0293, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Saber AminYavari
Coatings 2017, 7(11), 199; https://doi.org/10.3390/coatings7110199
Received: 6 October 2017 / Revised: 8 November 2017 / Accepted: 10 November 2017 / Published: 13 November 2017
(This article belongs to the Special Issue Surface Engineering of Biomaterials)
This study investigated the surface modification of orthodontic stainless steel using electrophoretic deposition (EPD) of bioactive glass (BG). The BG coatings were characterized by spectrophotometry, scanning electron microscopy with energy dispersive X-ray spectrometry, and X-ray diffraction. The frictional properties were investigated using a progressive load scratch test. The remineralization ability of the etched dental enamel was studied according to the time-dependent mechanical properties of the enamel using a nano-indentation test. The EPD process using alternating current produced higher values in both reflectance and lightness. Additionally, the BG coating was thinner than that prepared using direct current, and was completely amorphous. All of the BG coatings displayed good interfacial adhesion, and Si and O were the major components. Most BG-coated specimens produced slightly higher frictional forces compared with non-coated specimens. The hardness and elastic modulus of etched enamel specimens immersed with most BG-coated specimens recovered significantly with increasing immersion time compared with the non-coated specimen, and significant acid-neutralization was observed for the BG-coated specimens. The surface modification technique using EPD and BG coating on orthodontic stainless steel may assist the development of new non-cytotoxic orthodontic metallic appliances having satisfactory appearance and remineralization ability. View Full-Text
Keywords: electrophoretic deposition; enamel remineralization; bioactive glass; spectrophotometry; nanoindentation electrophoretic deposition; enamel remineralization; bioactive glass; spectrophotometry; nanoindentation
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MDPI and ACS Style

Kawaguchi, K.; Iijima, M.; Endo, K.; Mizoguchi, I. Electrophoretic Deposition as a New Bioactive Glass Coating Process for Orthodontic Stainless Steel. Coatings 2017, 7, 199.

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