Taborelli M, Jobin M, François P, Vaudaux P, Tonetti M, Szmukler-Moncler S, Simpson J P, Descouts P
GAP-Biomédical, University of Geneva, Switzerland.
Clin Oral Implants Res. 1997 Jun;8(3):208-16. doi: 10.1034/j.1600-0501.1997.080307.x.
We present an investigation of the physico-chemical surface properties of commercially pure titanium coverslips which were submitted to various treatments designed to optimize their topography in view of application in oral implantology. The surface microroughness, chemical composition and water wettability were analyzed on titanium coverslips prepared by mechanical polishing, acid attack in HCl/H2SO4, after mechanical polishing or sandblasting, and titanium plasma-spray. The chemical composition has been measured by Auger electron spectroscopy. The treatments have no major influence on the surface chemical composition and all the samples display a composition approaching that of TiO2 with minor amounts of carbon, sulfur, silicon and calcium as impurities. The roughness has been measured by scanning force microscopy on an area of 20 microns x 20 microns on each sample. Polished titanium is smooth (peak-to-valley roughness 81 nm), whereas the acid-attacked surfaces exhibit a micro-roughness in the microns range (2100 nm for polished and acid attacked; 3600 nm for sandblasted and acid attacked) which is quite reproducible over large areas of the sample. The acid attacked samples present a subsurface layer which contains hydrogen below the native passivating oxide layer. Water wettability measurement shows that all surfaces are hydrophobic with a slightly higher contact angle for the acid attacked surfaces. The different treatments analyzed in this study essentially influence the surface roughness by preserving the chemical composition and the wettability properties of titanium native oxide surface layer.
我们对商业纯钛盖玻片的物理化学表面性质进行了研究，这些盖玻片经过了各种处理，旨在优化其形貌，以用于口腔种植学。对通过机械抛光、在HCl/H₂SO₄中酸蚀（机械抛光或喷砂后）以及钛等离子喷涂制备的钛盖玻片的表面微观粗糙度、化学成分和水润湿性进行了分析。化学成分通过俄歇电子能谱进行测量。这些处理对表面化学成分没有重大影响，所有样品的成分都接近TiO₂，含有少量的碳、硫、硅和钙作为杂质。通过扫描力显微镜在每个样品的20微米×20微米区域测量粗糙度。抛光后的钛很光滑（峰谷粗糙度为81纳米），而酸蚀表面在微米范围内呈现微观粗糙度（抛光和酸蚀后的为2100纳米；喷砂和酸蚀后的为3600纳米），在样品的大面积区域内具有相当的可重复性。酸蚀后的样品在天然钝化氧化层下方有一个含氢的次表层。水润湿性测量表明，所有表面都是疏水的，酸蚀表面的接触角略高。本研究中分析的不同处理主要通过保留钛原生氧化表面层的化学成分和润湿性来影响表面粗糙度。
