目的：探讨酚醛树脂用于牙齿点隙裂沟封闭的抑菌杀菌作用效果。
Objective: To explore the microbial inhibitory effect of phenol-formaldehyde resin in sealing up pits and fissures.
同时通过对聚氨酯树脂的比较选择，封闭剂的比较和选择，合成了可低温解封的固化剂。
We compared the different polyurethanes and blocking additives, and choosed the suitable one to synthesize a resin, which unblock at the lower temperature.
本实验采用环氧树脂、有机仲胺、聚酰胺和封闭异氰酸酯为主要原料，合成了固体分在70%的阳离子型环氧聚合物树脂；
An epoxy resin, an organic secondary amine, a polyamide and a blocked isocyanate are selected as main materials to synthesize polymer resin with solid content of 70%.
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