Surface Modification of 316L Stainless Steel dental implants by Novel Bioinert Nano Zirconia coating

Bio-inert nano zirconia (Zr[O.sub.2]) coatings possess excellent biocompatibility, corrosion resistance and bio-inertness with superior mechanical properties makes it a suitable biomaterial for dental applications. The coatings were developed on 316L Stainless Steel (316L SS) using Electrophoretic D...

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Bibliographic Details
Published in:	Trends in biomaterials & artificial organs Vol. 34; no. 3
Main Authors:	Mohandoss, S, Ganeasan, M. Sundara, Manovasuki, J, Sridhar, T.M
Format:	Journal Article
Language:	English
Published:	Society for Biomaterials and Artificial Organs 01-07-2020
Subjects:	Biological products Coatings Corrosion (Chemistry) Dental implants Electrochemistry Mechanical properties Stainless steel Zirconium Zirconium oxide
Online Access:	Get full text
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Summary:	Bio-inert nano zirconia (Zr[O.sub.2]) coatings possess excellent biocompatibility, corrosion resistance and bio-inertness with superior mechanical properties makes it a suitable biomaterial for dental applications. The coatings were developed on 316L Stainless Steel (316L SS) using Electrophoretic Deposition (EPD) from a 2% suspension in Isopropanol (IPA). The coatings were carried out at various potentials ranging from 10-60 V. The effect of heat treatment on the nano zirconia coated samples were studied employing sintering at 800 [degrees]C in air atmosphere for 1 hour. The crystallinity, vibrational states, surface morphology and composition of the coatings were characterized by XRD, FTIR, and FE-SEM with EDAX respectively. The electrochemical performance of nano zirconia coated 316L Stainless Steel were investigated to evaluate its corrosion behaviour in artificial saliva using electrochemical techniques such as Open Circuit potential--time measurement (OCP), Electrochemical Impedance Spectroscopy (EIS) and Cyclic potentiodynamic polarization (CPP) studies. Nano zirconia coated samples have pronounced corrosion-resistant behaviour when compared to uncoated 316L SS. In vitro cytotoxicity studies of the nano zirconia coated 316L SS was accomplished by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-tetrazolium bromide (MTT assay) with human osteoblast cells. These studies confirmed the biocompatibility of nano zirconia coatings on 316L SS.
ISSN:	0971-1198