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http://dx.doi.org/10.3740/MRSK.2002.12.7.560

Fabrication of Ferroelectric BaTiO3Thin Film on Ti Substrate and Formation of Calcium Phosphate in Eagle’s MEM Solution  

Lee, Yong-Ryeol (Dept. of Dental Materials and Dental Materials Research Institute, College of Dentistry, Chonnam National University)
Jeong, Young-Hwa (Dept. of Dental Materials and Dental Materials Research Institute, College of Dentistry, Chonnam National University)
Hwang, Kyu-Seog (School of Automotive Mechanical Engineering, Nambu University)
Song, Ho-Jun (Korea Basic Science Institute)
Park, Yeong-Joon (Dept. of Dental Materials and Dental Materials Research Institute, College of Dentistry, Chonnam National University)
Publication Information
Korean Journal of Materials Research / v.12, no.7, 2002 , pp. 560-567 More about this Journal
Abstract
Titanium (Ti) is a bioinert material and has lower elastic coefficient and better strength/volume property than other metals. Ferroelectric materials show alignment of positive and negative charges by poling treatment. This study was purposed to develop a new implant system by combining the advantages of Ti and ferroelectric property of $BaTiO_3$ (BTO). It was performed with the assumption that the $Ca^{2+ }$ ions would be easily attracted on negatively charged surface and the attracted cation might behave as nuclei for bone-like crystal growth in biological solutions. A ferroelectric BTO thin film on Ti was fabricated and the effect of poling treatment on the improvement of calcium phosphate (Ca-P) formation in biological solutions was evaluated. After immersion in Eagle’s minimum essential media (MEM) solution, NaCl was formed on Ti, and Ca-P layer containing NaCl was formed on Ti-O. Weak and sparse Ca-P layers were formed on BTO, while thick, homogeneous, and dense Ca-P layer was formed on negatively polarized BTO (N-BTO), which was confirmed by FE-SEM and EDX. In summary, these results demonstrate that poling the ferroelectric BTO surface negatively is effective for the formation of Ca-P layer in MEM solution, and that N-BTO coating on Ti could be used as a possible alternative method for enhancing the osseointegration of the implants.
Keywords
ferroelectric; barium titanate; thin- film; calcium phosphate; poling; osseointegration;
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