50年代初,第一代树脂就已引用于口腔专业,它的配方以甲基丙烯酸甲酯为主,但变色范围大,产生微漏明显,不耐磨。在60年代出现了第二代复合树脂,已有了很大改进,但从临床角度来看,仍有两个明显的缺点;它们表面不能研磨抛光,同时表面粗糙的复合材料形成了“斑隙”,这就不可避免地导致材料变色。此外,在受力状态下,这种树脂耐磨性较差。 The early 1950s, the first generation of resin has been quoted in the oral profession, its formula to methyl methacrylate, but a large range of discoloration, resulting in obvious micro-leakage, not wear-resistant. The second generation of composite resins appeared in the 1960s and have been greatly improved, but there are two obvious drawbacks from a clinical standpoint; their surfaces can not be polished and the composite with a rough surface forms a “ ”This will inevitably lead to discoloration of the material. In addition, under stress conditions, this resin is less abrasive.