垫基材料的基本要求之一是必须能承受充填料在充填过程中所施加的力而不发生碎裂或过度流动。对于用作银汞合金充填的垫基材料来说,要达到这个目的是比较困难的,因为在银汞合金凝聚的过程中会对垫基材料施加较大的压力。本文作者的研究旨在弄清究竟哪些材料能承受银汞合金的凝聚力。众所周知,垫基材料的凝固过程受湿度的影响,所以不论水分存在与否,均可测量垫基材料的抗穿透力作为随时间而变化的函数,切割充填完毕的 One of the basic requirements of padding materials is that they must be able to withstand the forces applied by the filling material during filling without chipping or excessive flow. This is a difficult task for pad-based materials used as amalgam fill, because of the greater pressure applied to the pad-based material during the aggregation of the amalgam. The authors' study aimed to clarify exactly which materials can withstand the cohesion of amalgam. It is well-known that the solidification of pad-based materials is affected by humidity, so the penetration resistance of the pad-based material can be measured as a function of time over whether moisture is present or not, cut and filled