Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.
Dent Mater J. 2011;30(5):754-61. doi: 10.4012/dmj.2011-067. Epub 2011 Sep 23.
A novel coating technique of thin ceramic layer resembling teeth color on titanium (Ti) surface was developed by combination of sputter deposition of metal zirconium (Zr) and subsequent micro-arc oxidation (MAO) treatment. The oxide layer grown by MAO treatment had a porous structure with a thickness of approximately 6 micrometers and was mainly composed of zirconium dioxide (ZrO(2)) with both tetragonal and monoclinic crystal structures. The surface of the specimen was hardened by this technique, and the hardness of the specimen was significantly larger than that of untreated Ti and MAO-treated Ti without Zr layer. The bonding strength test revealed that fracture occurred inside the oxide layer, indicating that adhesion between the oxide layer and the Ti substrate was sufficiently strong. From these results, this technique has an advantage for the development of novel dental materials with excellent mechanical and aesthetic properties.
一种新型的涂层技术，在钛（Ti）表面形成类似于牙齿颜色的薄陶瓷层，是通过金属锆（Zr）的溅射沉积和随后的微弧氧化（MAO）处理相结合而开发的。MAO 处理生长的氧化层具有多孔结构，厚度约为 6 微米，主要由四方相和单斜相晶体结构的二氧化锆（ZrO(2)）组成。通过这种技术使试样表面硬化，并且试样的硬度明显大于未经处理的 Ti 和没有 Zr 层的 MAO 处理的 Ti。结合强度测试表明，断裂发生在氧化层内部，这表明氧化层与 Ti 基底之间的附着力足够强。从这些结果来看，该技术在开发具有优异机械和美学性能的新型牙科材料方面具有优势。
