Dubal Rajesh Kumar, Friel Tim, Taylor Philip D
Eur J Prosthodont Restor Dent. 2015 Mar;23(1):16-28.
This study investigated the suitability of irreversible hydrocolloid as an impression material for cobalt-chromium framework construction. Scans of casts derived from (1) alginate and (2) addition-cured polyvinylsiloxane impressions were superposed on to a control. The differences within and between groups were compared at fixed landmarks. The investigation revealed a high degree of scan coincidence within and between groups. However, certain features, such as undercuts, resulted in a lower degree of scan coincidence. Irreversible hydrocolloid appears to be a viable alternative to addition-cured polyvinyl-siloxane as an impression material for cobalt-chromium framework construction.
本研究调查了不可逆水胶体作为钴铬合金支架制作印模材料的适用性。将（1）藻酸盐印模和（2）加成型固化乙烯基硅橡胶印模所制取的模型扫描图像与一个对照模型进行叠加。在固定的标志点处比较组内和组间的差异。研究显示，组内和组间的扫描图像吻合度较高。然而，某些特征，如下颌倒凹，会导致较低的扫描图像吻合度。不可逆水胶体似乎是一种可行的替代材料，可作为加成型固化乙烯基硅橡胶用于钴铬合金支架制作的印模材料。
