TF-XRD examination of surface-reactive TiO2 coatings produced by heat treatment and CO2 laser treatment.
TF-XRD examination of surface-reactive TiO2 coatings produced by heat treatment and CO2 laser treatment.
复制标题
对热处理和 CO2 激光处理产生的表面反应 TiO2 涂层进行 TF-XRD 检查。
DOI：
10.1016/j.biomaterials.2004.11.020
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发表时间：
2005
期刊：
影响因子：
14
通讯作者：
T. Peltola
中科院分区：
文献类型：
--
作者：
N. Moritz;S. Areva;J. Wolke;T. Peltola
当通过CO2激光加工将表面反应（生物活性）涂层应用于医疗植入物时，植入物表面的生物活性可以局部改变以匹配周围组织的特性，从而提供植入物的牢固固定。本研究的目的是比较热处理的TiO 2涂层与激光处理的TiO 2涂层的非晶结晶相的发展。采用薄膜X射线衍射（TF-XRD）、原子力显微镜（AFM）和扫描电子显微镜（SEM）对涂层进行了表征。500°C热处理后的TiO 2涂层在模拟体液中具有生物活性，涂层主要由金红石相组成，表明金红石相对涂层的活性有显著影响。然而，在500°C下预热处理并进一步激光处理的涂层表现出增强的生物活性，同时主要由金红石组成。这些发现表明，金红石和金红石的涂层的反应性的关键作用。未经预热处理，仅经激光处理，非晶二氧化钛涂层发展成含金红石/金红石的混合涂层。因此，这种结构组织和晶体尺寸的增加被认为是其生物活性的原因。SBF的结果表明，通过改变激光功率，通过金红石/金红石结晶度增强控制生物活性的可能性。
When surface-reactive (bioactive) coatings are applied to medical implants by means of CO2laser processing, the bioactivity of the surface of the implant can be locally modified to match the properties of the surrounding tissues to provide a firm fixation of the implant. The aim of this study was to compare the heat treated TiO2coatings with the laser-treated TiO2coatings in terms of amorphous-crystalline-phase development. The coatings were characterized with thin-film X-ray diffraction (TF-XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The TiO2coatings heat treated at 500°C known to be bioactive in SBF (simulated body fluid) consisted mainly of anatase with some rutile-phase, suggesting a predominant effect of anatase on reactivity of coatings. However, the coatings preheat-treated at 500°C with further laser treatment exhibited enhanced bioactivity while consisting mainly of rutile. These findings indicated a key role of both rutile and anatase for the reactivity of the coatings. Without preheat treatment, by laser treatment alone, the amorphous titania coatings developed into mixed anatase/rutile containing coatings. This structural organization and the increase in crystal size are thus considered to be the reasons for their bioactivity. The SBF results indicate the possibility to control bioactivity by altering laser power used through the anatase/rutile crystallinity enhancement.