钴铬烤瓷合金不同表面处理工艺对金瓷结合力的影响

目的：测试钴铬烤瓷合金的机械性能，为其临床应用提供参考。方法：德国BEGO钴铬烤瓷，金属规格均为12mm×4．7mm×5mm，瓷层规格为4．4mm×3．8mm×2mm，采用剪切强度测试法观察金瓷结合力。实验分3组，A、B、C组金属分别经120目、100目、80目石英砂喷砂后上瓷。结果：A、B、C3组金瓷结合破坏力分别为（31．28±1．28）Mpa，（32．35±1．12）Mpa，（33．23±1．33）Mpa，3组差异无显著性（P〉0．05）。结论：钴铬合金经过表面不同程度的喷砂处理后对金瓷结合力没有显著的影响。

Influence of Cobalt-Chromium Ceramic Alloy after Different Surface Blasting Treatment on the Metal-ceramic Binding Force

Objective： To provide the reference for clinical application by testing the mechanical properties of cobalt-chromium ceramic alloy. Methods： Specimens （ BEGO, Germany） were combined by metal （ 12 mm × 4.7 mm × 5 mm） and porcelain （4.4 mm × 3.8 mm × 2 mm）. Shear strength test were used to observe the metal-ceramic bonding force. Samples were separated into 3 groups： A, B, C group were mechanically polished sequentially with quartz sand of grit 120, 100 and 80 then combined with ceram- ic respectively. Results： The destructive power of metal-ceramic bonding of A, B, C group were （33.28 ± 1.28） Mpa, （35.23 ± 1.33） Mpa, （34. 35 ± 1.12） Mpa respectively. There was no significant difference among three groups （P 〉0.05）. Conclusion： The results indicated that no significant impact appeared on gold-porcelain bonding force after different degrees of surface blasting treatment on cobalt-chromium alloy.