等离子喷涂人工骨涂层材料

Plasma sprayed biomedical coatings for artificial bone

等离子喷涂是一种常用的生物医用材料表面改性技术,被广泛应用于钛等金属人工骨的表面改性。为了满足人工骨涂层的临床应用需要,近年来发展了一些新的涂层材料和后处理工艺技术。利用火焰蒸汽处理技术对等离子喷涂羟基磷灰石涂层进行后处理,提高了涂层的结晶度,降低其在体液中的降解。经碱处理的等离子喷涂钛涂层,生物活性有了明显的改善。等离子喷涂硅灰石和硅酸二钙陶瓷是一类不同于传统磷酸钙系的新型生物活性材料,其性能和结构已被初步研究。同时介绍了等离子喷涂人工骨涂层材料在这几个方面的近期研究进展。

Plasma spraying technology is widely used to modify the surface of biomedical materials, such as titanium and its alloys. In order to obtain the artificial bone coatings for the application in clinic, some new materials and process were investigated. The crystallinity of plasma sprayed hydroxyapatite coatings are improved by using vapor-flame treatment process, and then the dissolution of hydroxyapatite coating in body fluid decreases. After treated by alkali, the plasma sprayed titanium coating possesses good bioactivity. As the new bioactive coatings, plasma sprayed wollastonite and dicalcium silicate coatings are being researched. New developments of plasma sprayed biomedical coatings for artificial bone were introduced simply.