Papadopoulos T, Axelsson M
Department of Dental Materials and Technology, Karolinska Institute, Stockholm, Sweden.
Scand J Dent Res. 1990 Feb;98(1):60-5. doi: 10.1111/j.1600-0722.1990.tb00940.x.
The thermal expansion of a phosphate-bonded investment material was tested when three heating rates were used during the heating procedure. One of them was too low, one too high, and the third, in the middle. The examination was done through the fit of 12 MOD inlays and 12 full crowns in steel master dies. From the results it can be concluded that rates that are too fast must be avoided in the heating procedure, because they reduce the thermal expansion of the phosphate-bonded investment material and thus produce castings with limited fit.
在加热过程中采用三种加热速率时，对一种磷酸盐粘结包埋材料的热膨胀进行了测试。其中一种速率过低，一种过高，第三种处于中间值。通过将12个MOD嵌体和12个全冠适配于钢制母模进行检测。从结果可以得出结论，在加热过程中必须避免过快的速率，因为它们会降低磷酸盐粘结包埋材料的热膨胀，从而产生适配性有限的铸件。
