Dental Pulp Protection to Composite Resin Restoration

复合树脂修复需要有效的衬层材料保护牙髓损伤，消除树脂与衬层材料之间的异常反应。通过扫描电镜观察了五种内衬材料与复合树脂的反应情况。玻璃离子水门汀（Fuji Iceland）、羧酸盐水门汀（Liv cenera）和<alpha>-TCP（测试材料）对树脂表面没有影响，然而，氧化锌丁香酚水门汀（Neodyne-<alpha>）和固体型氢氧化钙（Dycal）引起树脂表面沿着区域的异常聚合。将光固化复合树脂充填在31颗人实验牙的衬层材料Liv cenera上。这些病例观察3个月，然后提取。制备病理标本，光镜观察。3例（10%）患者出现叩诊不适。病理损害轻微或轻微，结果几乎良好。另一个临床试验使用内衬测试材料<alpha>-TCP。40例中有2例引起对寒冷的过敏，其他病例正常。

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.