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目的 通过扫描电镜观察金属烤瓷修复体的金属底层经过不同处理后的结构及化学变化。方法 金属表面进行失晶、喷砂、砂石磨光、抛光等不同处理后用扫描电镜观察。结果 在金属表面有四种类型的结构形成 ,经过失晶处理后的金属表面形成大量空穴和倒凹状结构 ,同时元素增加及含量也增加。分布也有明显变化。经喷砂的金属表面 ,只形成大量的凹凸不平的粗糙结构 ,凹陷深度小于失晶法 ,元素增加及含量都较上述减少。砂石磨光的金属表面仅出现线状浅沟纹结构。抛光的金属表面平坦 ,无结构改变。结论 失晶能提供金瓷的机械性结合及化学结合的表面结构 ,提高金瓷结合强度。后两者均不利于金瓷的结合固位。
Objective To observe the structure and chemical changes of the metal underlayer after different treatments by scanning electron microscopy. Methods The metal surface was subjected to different treatments, such as losing crystal, sandblasting, gravel polishing and polishing, and then observed by scanning electron microscope. As a result, there are four types of structures formed on the surface of the metal. A large amount of holes and inverted concave structures are formed on the surface of the metal after the dislocation treatment, and simultaneously the content of the elements increases. Distribution also has significant changes. The sandblasted metal surface, only a large number of rough structure of roughness, depression depth less than the loss of crystallization method, the increase and content of elements are reduced than the above. Sand polished metal surface only linear shallow groove structure. Polished metal surface is flat, no structural changes. Conclusion Dislocation can provide the mechanical bonding of gold porcelain and the chemical bonding of the surface structure, improve the bonding strength of gold and porcelain. The latter two are not conducive to the binding of gold porcelain retention.