Effect of interfacial variables on metal-porcelain bonding.
Effect of interfacial variables on metal-porcelain bonding.
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DOI：
10.1002/jbm.820270414
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发表时间：
1993-04
期刊：
影响因子：
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通讯作者：
W. Wagner;K. Asgar;W. Bigelow;R. Flinn
中科院分区：
文献类型：
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作者：
W. Wagner;K. Asgar;W. Bigelow;R. Flinn
虽然陶瓷-金属结合已被用于许多应用中，但导致最佳结合强度的实际化学和物理因素尚未得到很好的理解。在这项工作中，影响牙科瓷和钯合金（85%钯，10%铜，5%镓）之间的结合的几个变量进行了研究：1）预涂层的金属通过溅射各种氧化物前烤瓷; 2）过氧化的金属基底前烤瓷; 3）在还原气氛下烤瓷;和4）表面粗糙度在控制水平前烤瓷。使用改进的推压甜甜圈剪切粘结强度测试来测量粘结强度，获得以下结果。1)与标准“对照”样品相比，氧化铝预涂层试样显示出46%的粘结强度提高，而铜，锰和氧化锡预涂层表现出较小的影响。2)金属基底的预氧化导致通过表面粗糙化以及氧化物形成的显著结合强化（152%）。3)在还原性气氛下的烤瓷严重降低了粘结强度（比对照低88%），表明在标准烧制周期中氧化的作用。4)通过控制量对表面进行机械粗糙化，得到了显著的改善，具有更大的缺口深度。粗粗糙化产生最高的粘结强度改善（486%）。
While ceramic-to-metal bonding has been used in many applications, the actual chemical and physical factors leading to optimum bond strength are not well understood. In this work, several variables affecting the bonding between dental porcelain and a palladium alloy (85% Pd, 10% Cu, and 5% Ga) were investigated: 1) precoating the metal by sputtering various oxides before porcelaining; 2) peroxidation of the metal base before porcelaining; 3) porcelaining under reducing atmosphere; and 4) surface roughening at controlled levels before porcelaining. Using a modification of the push doughnut shear bond strength test to measure bond strength the following results were obtained. 1) Compared with standard "control" samples, the aluminum oxide precoated specimens showed a bond strength improvement of 46%, while the copper, manganese, and tin oxide precoatings exhibited smaller effects. 2) Preoxidation of the metal base led to pronounced bond strengthening (152%) by surface roughening as well as oxide formation. 3) Porcelaining under a reducing atmosphere severely reduced bond strength (88% lower than the controls) indicating the role of oxidation during the standard firing cycle. 4) Mechanical roughening of the surface by controlled amounts gave pronounced improvements with greater notch depth. Coarse roughening produced the highest bond strength improvements (486%).