| 摘要 |
PROBLEM TO BE SOLVED: To provide a dental gypsum powder with which generation of air bubbles in a kneaded material is suppressed only by kneading with water without using any special device or any instrument, and without using any emulsifier or any kneading liquid.SOLUTION: A dental gypsum powder includes a cyclic siloxane having three to ten SiO(CH)units of 0.00001 to 0.0005 wt.%. For instance, the cyclic siloxane is preferably hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, or decamethylcyclopentasiloxane. |
