牙种植体纳米含氟羟基磷灰石涂层材料制备实验研究

目的 探讨用溶胶-凝胶法制备出的纳米含氟羟基磷灰石（nFHA）材料用于纯钛表面涂覆的理论依据。方法 本实验于2010年1-5月在中南大学粉末冶金研究院完成。采用溶胶-凝胶法制备nFHA和羟基磷灰石（HA）材料，通过X线衍射（XRD）、透射电镜（TEM）表征其物相组成及颗粒大小，扫描电镜（SEM）观察涂层在纯钛表面形貌。结果 XRD检测结果显示，运用溶胶-凝胶法可制备出nFHA材料，氟离子进入HA晶体中，以nFHA固溶体形式存在。TEM显示，nFHA晶体呈短棒状，粒径大部分在100 nm以下，符合纳米级别。SEM显示，热处理后的nFHA涂层，为多孔形貌，相互形成穿通结构，颗粒均匀分布，无明显裂纹。结论 （1） 采用溶胶-凝胶法可制备出nFHA涂层材料；（2） nFHA较HA在钛基表面涂层可形成更佳的孔隙结构。

Preparation of nano fluoridated hydroxyapitite for dental implant coatings

Objective To investigate the surface properties of nano fluoridated hydroxyapatite （nFHA） modified for titanium coating; to provide further experimental work with foundation. Methods Sol-gel method was used to prepare nFHA and hydroxyapatite （HA） ; XRD and TEM were used to obtain the surface formation of nFHA; pure Ti substrates were observed by SEM. Results The XRD test showed that nFHA coatings were deposited onto pure Ti substrates by sol-gel method. F was incorporated into the HA lattice structure and nFHA existed in the state of solid solution. The TEM micrograph of nFHA showed that most nano-sized powders in short rod-like shape were synthesized below 100nm. The SEM observation showed that nFHA coatings deposited on pure Ti substrates after heat treatment showed porosity interacted to each other and particles were distributed evenly without crack. Conclusion （ 1 ） nFHA coatings can be prepared by sol-gel method; （2）nFHA deposited on pure Ti substrates has better porosity structure than HA.