论文部分内容阅读
(二)复合树脂的性能1.凝固特性:(1)化学固化型:其固化是在调和两组份后立刻发生,整个材料的固化速度是均匀一致的。因此,此材料的操作时间有限制,它必须在变得难以处理前就完成充填,并在其表面覆盖一层塑料成型条,加压下,正常是在2～3分钟内完成聚合,根据此固化特性,因此只要看到表面硬化了就可保证洞底的材料也同时
(B) the performance of the composite resin 1. Coagulation properties: (1) chemical curing type: its curing occurs immediately after reconcile the two components, the curing speed of the entire material is uniform. Therefore, there is a limit to the operating time of this material. It must be filled before it becomes difficult to handle and covered with a plastic molded strip on its surface. Under normal pressure, the polymerization is completed within 2 to 3 minutes. Based on this Curing characteristics, so as long as the surface hardening can guarantee the material of the bottom hole at the same time