Ito M, Yamagishi T, Oshida Y, Munoz C A
Institute for Dental Research, Matsumoto Dental College, Japan.
J Prosthet Dent. 1996 Feb;75(2):211-6. doi: 10.1016/s0022-3913(96)90101-8.
This study evaluated the relationship between flow characteristics, bending strength, and softening temperature of paraffin and dental inlay waxes to casting shrinkage when patterns were invested with a phosphate-bonded investment. This study found that the casting shrinkage decreased as the flow of the wax pattern increased. If a low flow wax is used or if there is a need for a thick pattern, the size of the casting ring should be increased. When wax patterns are formed for cast restorations, it is important to select the type of wax with the most desirable properties for the margin and the occlusal portions. Moreover, to accurately fabricate castings, it is necessary to understand the physical properties of the chosen waxes.
本研究评估了石蜡和牙科嵌体蜡的流动特性、弯曲强度及软化温度与采用磷酸盐粘结包埋材料包埋铸型时铸造收缩率之间的关系。本研究发现，蜡型的流动性增加时，铸造收缩率降低。如果使用低流动性的蜡或需要制作厚的铸型，则应增大铸圈尺寸。为铸造修复体制作蜡型时，为边缘和咬合部分选择具有最理想性能的蜡型很重要。此外，为精确制作铸件，有必要了解所选蜡的物理性能。
