题目内容

Syneresis refers to()

A. the expansion ofa hydrocolloid impression material when it takes in water
B. the contraction of a hydrocolloid impression material when it exudes water
C. the fact that the sol and gel temperatures ofthe hydrocolloid differ
D. the inclusion ofpowder in a hydrocolloid impression material

查看答案

搜索结果不匹配？点我反馈

更多问题

Which of the following impression materials set by physical means()

A. agar
B. ZOE
C. alginate
D. addition silicone

轧制过程中，当压下量不变，轧件厚度不变时()，越容易咬入。

A. 轧辊直径加大
B. 轧制速度加大
C. 轧辊直径减小

用个别托盘以中稠度聚醚印模材料制取四分之一区位的印模。在托盘与口腔结构间保持常规的2mm间隙。在取出印模后，发现有几处撕裂。再次取印模时，应采取哪些措施来减少撕裂发生的可能性？

凝溢