Development of acid resistive apatite sheet with gradation of fluorine density and crystallinity

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560864
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Kinki University
• Principal Investigator: KUSUNOKI Masanobu 近畿大学, 生物理工学部, 教授 (20282238)
• Co-Investigator(Kenkyū-buntansha): OKAI Daisuke 兵庫県立大学大学院, 工学研究科, 助教 (60336831)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: フッ化アパタイト / ハイドロキシアパタイト / 膜

Outline of Final Research Achievements

We developed a fabrication method of new dental material of apatite sheet that prevents tooth decay. Using the pulsed laser deposition, top side of the sheet was made of crystalized fluoroapatite (F-Ap) to prevent from tooth decay, and the bottom side of the sheet was made of amorphous hydroxyapatite (H-Ap) to be able to bond itself with the tooth surface. Degree of crystallization and density of the F and OH was gradually varied from the top to the bottom through the film. X-ray diffraction showed that a single layer of the F-Ap film was crystallized with c-axis orientation perpendicular to the film surface. Fourier-transform infrared spectroscopy indicated that the single F-Ap film was pure Ca10(PO4)6F2 without OH group. The F-Ap film showed an acid resistance lower than pH of 5.

Free Research Field

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