DeLong R, Goodkind R J, Douglas W H
J Prosthet Dent. 1984 Sep;52(3):344-8. doi: 10.1016/0022-3913(84)90441-4.
This study was designed to determine if corrosion-fatigue might play a part in early failure of the porcelain-fused-to-metal bonds with Ni-Cr alloys. A qualitative test was used that compared the bond strengths of a control group with those of samples subjected to corrosion-fatigue. One Au-Pd alloy was used for comparison with the Ni-Cr alloys. The bond strengths were determined with a shear-push through test in an M.T.S. hydraulic testing machine. Two additional groups of samples were tested with corrosion only and fatigue only. All samples except those used for controls were placed in an oral environment chamber that had an aerated artificial saliva circulating through it maintained at 37 degrees C. (Samples subjected to fatigue only used unaerated distilled water). Corrosion was accelerated by enforcing a potential of approximately 500 mV on the test samples. The samples subjected to fatigue were stressed with a haversine waveform with a force between 5 and 45 pounds at a rate of 200 Hz for 10(6) cycles.
本研究旨在确定腐蚀疲劳是否可能在镍铬合金烤瓷熔附金属结合部的早期失效中起作用。采用了一种定性试验，将对照组的结合强度与经受腐蚀疲劳的样品的结合强度进行比较。使用一种金钯合金与镍铬合金进行比较。在M.T.S.液压试验机上通过剪切推穿试验测定结合强度。另外两组样品分别仅进行腐蚀试验和仅进行疲劳试验。除用于对照的样品外，所有样品都放置在一个口腔环境试验箱中，箱内有充气的人工唾液循环流动，温度保持在37摄氏度（仅进行疲劳试验的样品使用未充气的蒸馏水）。通过在测试样品上施加约500毫伏的电位来加速腐蚀。对经受疲劳试验的样品施加正弦波形应力，力在5至45磅之间，频率为200赫兹，持续10（6）个循环。
