Dental Pulp Protection to Composite Resin Restoration

复合树脂修复需要有效的衬里材料来保护牙髓损伤，并消除树脂与衬里材料之间的异常反应。第1部分。通过扫描电镜研究了五种衬里材料与复合树脂之间的反应。玻璃离子水门汀（Fuji ionomer）、羧酸盐水门汀（Liv cenera）和< α > - tcp（试验材料）对树脂表面没有影响，而氧化锌丁香酚水门汀（Neodyne- < α >）和固体型氢氧化钙（Dycal）在树脂表面引起了不寻常的聚合。第2部分。用光固化复合树脂填充31颗人实验牙的内衬材料Liv cenera。这些病例观察3个月后取出。制备病理标本，在显微镜下观察。3例（10%）出现叩击不适。病理损伤轻微或轻度，结果基本良好。另一项临床试验采用衬里试验材料< α > -TCP进行。40例中有2例出现了对寒冷的过敏反应，其余为正常现象。

It's necessary to protect pulp damage with effective lining material for composite resin restoration, and to eliminate unusual reaction caused between resin and lining matelials.Part 1. Reaction between each five lining material and composite resin are surveyed through SEM. Glass ionomer cement(Fuji Ionomer), calboxylate cement(Liv cenera) and <alpha> -TCP(Test material) did not affect on resin surface, however, zinc oxide eugenol cement(Neodyne- <alpha> ) and solid type calcium hydroxide(Dycal) caused unusual polymerization along superficial zone of resin.Part 2. A light cured composite resin was filled on the lining material Liv cenera with 31 human experimental teeth. These cases were observed during 3 months, then extracted. Pathological specimens were prepared and studied through microscope. Percussion discomfort was observed in 3 cases(10%). Pathological damages were slight or mild, and results were almost good.Another clinical test using a lining test material <alpha> -TCP were conducted. Two cases out of 40 caused hypersensitivity to the cold and other cases were normal.