Abstract: Objective    To observe the changes of chemical elements between the different base material and the veneering porcelain with the electron probe，and analyze the pattern of chemical combination of the different base material and the veneering porcelain. Methods    Using the maxillary lateral incisor as a model，Ni-Cr alloy，zirconia，the Au-Pd alloy，press casting ceramic，Co-Cr alloy and mixed Au-Pd alloy base crown were selected and fired opaque and body porcelain respectively according to the recommended procedures by manufacturere. The thickness of ceramic layer was controlled with in 2mm on the labial side. The experimental sample was cut with the low speed diamond saw. Grind， polish and ultrasonically clean the cut surface. The zirconia sample and press casting porcelain sample were sprayed with gold in vacuum. Then observe the interface with electron microscopy， and analyze the situation of the elements exchange and transfer with the line scan and point scan of electron probe in the interfacial depth of about 10 μm. Results    Element diffusions appeared between the Ni-Cr alloy，zirconia，the Au-Pd alloy，Co-Cr alloy，mixed Au-Pd alloy base crown and veneering porcelain. Some elements could penetrate into veneering porcelain in the range of 1-2 μm，and the extent of element diffusion weakened until it disappeared with the increase of depth. The interface of press casting porcelain crown and veneering porcelain was not found. Conclusion    The composition between press casting crown and veneering porcelain is homogeneity. There is chemical combination between the 5 kind of base crown and the veneering porcelain during the process of firing.

Key words: ceramic, base-porcelain interface, base crown, element diffusion

摘要： 目的    定性分析不同基底材料与饰面瓷之间化学结合的方式。方法    本研究于2011年3—9月在大连市口腔医院和大连交通大学完成。以上颌侧切牙为模型，选用镍铬（Ni-Cr）合金、氧化锆、金钯（Au-Pd）合金、压铸瓷、钴铬（Co-Cr）合金、混合Au-Pd合金6种基底材料，按照厂家的操作要求在不同基底材料上烧结饰面瓷。然后用扫描电镜观察各基底材料与饰面瓷界面，并用能谱分析仪进行元素分析。结果    Ni-Cr合金、氧化锆、Au-Pd合金、Co-Cr合金、混合Au-Pd合金5种基底与饰面瓷之间均发生了程度不同的元素扩散，扩散范围约1～2 μm。随着远离界面，扩散元素含量逐渐降低直至消失。压铸瓷基底在实验条件下未明显观察到饰面瓷与压铸瓷的结合界面。结论    Ni-Cr合金、氧化锆、Au-Pd合金、Co-Cr合金、混合Au-Pd合金及压铸瓷基底在和饰面瓷的烧结过程中均发生了化学结合。

关键词: 陶瓷, 基底-瓷界面, 基底材料, 元素扩散