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http://dx.doi.org/10.4047/jap.2013.5.4.416

Gene expression of MC3T3-E1 osteoblastic cells on titanium and zirconia surface  

Gong, Soon-Hyun (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Lee, Heesu (Department of Oral Anatomy, Dental School, Gangneung-Wonju National University)
Pae, Ahran (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Noh, Kwantae (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Shin, Yong-Moon (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Lee, Jung-Haeng (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Woo, Yi-Hyung (Department of Prosthodontics, School of Dentistry, Kyung-Hee University)
Publication Information
The Journal of Advanced Prosthodontics / v.5, no.4, 2013 , pp. 416-422 More about this Journal
Abstract
PURPOSE. This study was performed to define attachment and growth behavior of osteoblast-like cells and evaluate the gene expression on zirconia compared to titanium. MATERIALS AND METHODS. MC3T3-E1 cells were cultured on (1) titanium and (2) zirconia discs. The tetrazolium-based colorimetric assay (MTT test) was used for examining the attachment of cells. Cellular morphology was examined by scanning electron microscopy (SEM) and alkaline phosphatase (ALP) activity was measured to evaluate the cell differentiation rate. Mann-Whitney test was used to assess the significance level of the differences between the experimental groups. cDNA microarray was used for comparing the 20215 gene expressions on titanium and zirconia. RESULTS. From the MTT assay, there was no significant difference between titanium and zirconia (P>.05). From the SEM image, after 4 hours of culture, cells on both discs were triangular or elongated in shape with formation of filopodia. After 24 hours of culture, cells on both discs were more flattened and well spread compared to 4 hours of culture. From the ALP activity assay, the optical density of E1 cells on titanium was slightly higher than that of E1 cells on zirconia but there was no significant difference (P>.05). Most of the genes related to cell adhesion showed similar expression level between titanium and zirconia. CONCLUSION. Zirconia showed comparable biological responses of osteoblast-like cells to titanium for a short time during cell culture period. Most of the genes related to cell adhesion and signal showed similar expression level between titanium and zirconia.
Keywords
Dental implants; Zirconia; Titanium; Osteoblast-like cells; cDNA microarray;
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