关键词: 印模材料, 藻酸盐, 琼脂, 硅橡胶, 聚醚橡胶, 聚硫橡胶

Abstract: The quality of impression plays a very important role in the accuracy and quality of the final restoratives. The commonly used elastic impression materials in clinic are alginate hydrocolloid impression material，agar hydrocolloid impression material，silicone impression material，polyether impression material and polysulfide impression material. Their properties are varies from each other due to the differences in compositions. Thus，in order to achieve the best treatment results，it is important to select appropriate impression materials and disinfection methods according to the cases in clinic. This article summarizes the properties of elastic impression materials and their clinical manipulation properties that should be paied attention to in clinical work.

Key words: impression material, alginate, agar, silicone, polyether, polysulfide