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Fluoridated hydroxyapatite coatings on human enamel using chemical deposition
YUE Xue-ta 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.7
Investigation of fabricating enamel-like structure in vitro is of great interest in the fields of dentistry and material sciences. In this study the coatings with organized fluoridated hydroxyapatite crystals were obtained on etched human enamel (14 oC45oC) using a simple chemical approach. In the chemical approach phosphoric acid etched enamel slices were immersed ina solution for 10 days which contained NaH2PO4, Ca(NO3)2, EDTA-Na2 and NaF to form fluoridated hydroxyapatite coatings. The coating was analyzed by SEM, EDS, XRD, FT-IR and nanoindentation tests. We found that the coating is uniform anddense, with enamel-like structure and the crystals of coating have a typical hexagonal structure and are about 200 nm in crosssection and the shape of crystal. When the enamel slices were immersed for 10 days the Elastic modulus and hardness of thecoating reached 85.3 ± 6.2 GPa and 3.91 ± 0.55 GPa respectively which are close to that of natural enamel. Compared tohydroxyapatite (HAP) coatings it is useful and demonstrates a potential application to repair enamel damage in dental clinics.
Detecting small lung tumors in mouse models by refractive-index microradiology
Chien, Chia-Chi,Zhang, Guilin,Hwu, Y.,Liu, Ping,Yue, Weisheng,Sun, Jianqi,Li, Yan,Xue, Hongjie,Xu, Lisa X.,Wang, Chang Hai,Chen, Nanyow,Lu, Chien Hung,Lee, Ting-Kuo,Yang, Yuh-Cheng,Lu, Yen-Ta,Ching, Y Springer-Verlag 2011 ANALYTICAL AND BIOANALYTICAL CHEMISTRY Vol.401 No.3