Titania-based materials
Titania-based materials
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二氧化钛基材料
DOI：
10.1533/9781845694227.2.485
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
T. Matsushita
中科院分区：
文献类型：
--
作者：
T. Kokubo;H. Takadama;T. Matsushita
二氧化钛基材料很容易通过化学和热处理在钛金属及其合金上形成。金属由于其高断裂韧性而可在高负荷条件下使用，但它们不与活骨结合，并且通常通过经由粗糙表面与骨的机械互锁或通过将聚甲基丙烯酸甲酯骨水泥填充到金属植入物与骨之间的间隙中而固定到周围骨。使用这些方法的固定不能长期稳定，有时需要在金属植入物周围移植自体骨进行固定。然而，自体骨的收获涉及过度侵入，有时会导致并发症。鉴于这些事实，期望金属植入物表现出骨结合能力。为了向金属材料提供骨结合能力，已经开发并临床使用了使用等离子喷涂技术在金属植入物上的磷酸钙涂层。然而，在该方法中，磷酸钙仅涂覆在暴露于等离子体的表面上，并且涂覆层相对较厚;因此，不能在复杂形状上形成均匀的生物活性层。与此相反，使用金属的溶液和热处理，可以在所有表面上形成薄而均匀的二氧化钛基涂层，甚至在复杂的形状上也是如此。本章介绍了二氧化钛基材料在金属上的形成，这些二氧化钛基材料的性质，以及磷灰石在这些二氧化钛基材料上形成的机理。
Publisher Summary Titania-based materials are easily formed on titanium metal and its alloys by chemical and thermal treatments. Metals can be used under high load conditions, because of their high fracture toughness, but they do not bond to living bone and are usually fixed to the surrounding bone by a mechanical interlocking with the bone via a roughened surface or by filling polymethylmethacrylate bone cement into a gap between a metallic implant and the bone. Fixation using these methods is not stable for long periods, and sometimes autogenous bone is transplanted around metallic implants for fixation. However, harvesting of the autogenous bone involves excessive invasion and sometimes leads to complications. In view of these facts, it would be desirable for metallic implants to exhibit bone-bonding capability. To provide a bone-bonding capability to a metallic material, a coating of calcium phosphate on a metallic implant using a plasma-spray technique has been developed and used clinically. However, in this method, calcium phosphate is only coated on the surfaces exposed to the plasma and the coated layer is relatively thick; hence, a uniform bioactive layer cannot be formed on complex shapes. In contrast to this, thin, uniform titania-based coatings can be formed on all surfaces, even on complex shapes using solution and thermal treatments of the metal. This chapter describes the formation of titania-based materials on metals, the properties of these titania-based materials, and the mechanism of apatite formation on these titania-based materials.
影响因子：
14
作者：
Takemoto, M;Fujibayashi, S;Nakamura, T
通讯作者：
Nakamura, T
影响因子：
14
作者：
Fujibayashi, S;Neo, M;Nakamura, T
通讯作者：
Nakamura, T