多孔钛表面梯度磷灰石涂层的简单化学法制备

Graded Apatite Formation on Surface of Porous Titanium by Simple Chemistry

摘要:

通过碱液处理或碱热处理并在模拟体液(SBF)中浸泡，在多孔钛表面制备了具有梯度结构的类骨磷灰石层。结果表明，碱液处理使多孔钛表面形成了网状多孔结构，组成为钛酸钠、金红石等。热处理后磷灰石在多孔钛表面的初期沉积更均匀。涂层中钙，磷、氧以及钛元素的含量随深度而变化，形成了梯度结构。具有表面梯度磷灰石涂层的多孔钛有望用于临床矫形，以提高种植体的生物活性和骨结合强度。

Abstract:

Graded carbonate containing apatite coatings were formed on the surface of porous titanium alkali treated or alkali and heat treated by soaking in simulated body fluid. The results indicated that a porous network structure composed of sodium titanate and titanium oxide was formed on the surfaces after the porous titanium was treated by NaOH aqueous solution. Apatite nucleation on the surface of alkali and heat treated porous titanium at early stage was homogeneous. The contents of Ca, P and O decreased while that of Ti increased with the increasing of depth and a graded structure was formed near the surface of porous titanium. The porous titanium coating with the graded apatite is expected to be applied in clinical orthopedics to enhance bone implant bonding strength.