Anusavice K J, Shen C, Vermost B, Chow B
College of Dentistry, University of Florida, Gainesville.
Dent Mater. 1992 May;8(3):149-52. doi: 10.1016/0109-5641(92)90072-k.
The purpose of this study was to test the hypothesis that high-leucite content feldspathic porcelain can be strengthened best by thermal tempering followed by ion exchange, compared with either thermal tempering or ion exchange alone. The results of biaxial flexure testing indicate that thermal tempering was the most effective way of strengthening the porcelain among the three methods tested. The combined procedure did not yield the greatest strengthening effect as hypothesized, but one that is only slightly stronger than that produced by ion exchange alone. Weibull analysis indicated that the ion-exchange treatment resulted in a narrower distribution of biaxial flexural strength compared with that of untreated or thermally tempered porcelain. The narrower distribution of biaxial flexural strength is considered desirable for enhancing the longevity of ceramic-based dental restorations.
与单独进行热钢化或离子交换相比，高白榴石含量的长石质瓷通过先热钢化再进行离子交换的方式能得到最佳强化效果。双轴弯曲测试结果表明，在测试的三种方法中，热钢化是强化该瓷的最有效方法。联合处理并未如假设那样产生最大强化效果，而是仅比单独离子交换产生的强化效果稍强一点。威布尔分析表明，与未处理或热钢化的瓷相比，离子交换处理使双轴弯曲强度的分布更窄。双轴弯曲强度分布更窄被认为有利于提高陶瓷基牙科修复体的使用寿命。
