Korean Journal of Materials Research, Vol.12, No.7, 560-567, July, 2002
티타늄 기판 위에 강유전성 BaTiO 3 박막 형성과 분극처리에 의한 Eagle's MEM 용액에서의 Calcium Phosphate 생성
Fabrication of Ferroelectric BaTiO 3 Thin Film on Ti Substrate and Formation of Calcium Phosphate in Eagle's MEM Solution
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itanium (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.
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