Palaskar Jayant, Nadgir Dhruv V, Shah Ila
J Indian Prosthodont Soc. 2010 Sep;10(3):160-4. doi: 10.1007/s13191-010-0033-x. Epub 2010 Dec 8.
Castability plays an important role in selection of an alloy for cast dental restorations. This study was conducted to assess the effect of recasting of nickel-chromium alloy on its castability. Different percentage combinations of new and once casted alloy were used to produce a total of twentyfive cast samples using modified Whitlock's method and castings obtained from new alloy were used as control group. Castability value was obtained by using Whitlock's formula. Results were analyzed using student 't' test. There is no statistical difference between the castability value of the new alloy and the recasted alloy (confidence level 95%). Within the limitations of the study it is concluded that the castability value will not be affected by recasting the nickel-chromium alloy. Complete castings of any metal restoration are mandatory and to know the completeness of castings of any alloy, castability test is of prime importance.
铸造性能在铸造牙科修复体合金的选择中起着重要作用。本研究旨在评估镍铬合金再铸造对其铸造性能的影响。使用新合金和一次铸造合金的不同百分比组合，采用改良的惠特洛克方法共制作了25个铸造样本，并将从新合金获得的铸件用作对照组。通过使用惠特洛克公式获得铸造性能值。结果采用学生t检验进行分析。新合金和再铸造合金的铸造性能值之间没有统计学差异（置信水平95%）。在本研究的局限性范围内，可以得出结论，镍铬合金再铸造不会影响铸造性能值。任何金属修复体的完整铸件都是必需的，而要了解任何合金铸件的完整性，铸造性能测试至关重要。
