牙科钛铸件的表面处理

纯钛在高温下化学性质活泼，故其铸件表面易形成较厚的污染层影响其固有的优良型化性质，即使在常温下暴露在空气中的纯钛表面也易形成一层氧化膜，使其表面光泽变暗，因此钛铸件的表面处理与其他牙科常用合金铸件比较就显著更为重要。本文就牙科钛铸件的表面处理工艺归纳为物理研磨、化学研磨、电解和表面改性等四个方面详细综述。

Surface Treatments for Dental Titanium Castings

Because pure titanium is highly reactive at high temperature, its casting surface is easily coated with a thick contaminated layer that affects its physical and chemical properties, and consequently a stable superficial oxide membrame develops in the presence of air or water even at room temperature, which makes the surface discolored. Therefore, surface treatments for pure titaium castings are more important than those for other dental alloy castings. This article reviews the methods of surface treatments for dental titanium castings in four aspects:physical finishing, chemical finishing, electrochemical finishing and surface modification technology.