Sparrius O, Grossman E S
Medical Research Council/University of the Witwatersrand, Dental Research Institute, Johannesburg, South Africa.
J Prosthet Dent. 1989 Jun;61(6):678-84. doi: 10.1016/s0022-3913(89)80041-1.
Marginal leakage is a cause of failure of composite resin restorations. The effect of two enamel and two dentin bonding agents on marginal leakage alongside composite resins was assessed and compared in enamel and dentinal cavities. Cavities, one in buccal enamel and the other in cervical dentin, were prepared in each of 350 extracted sound human premolar teeth and randomly assigned to combinations of bonding agents and composite resins. After insertion the restorations were polished and the restored teeth were stored in distilled water and thymol at 20 degrees C for 28 days. This was followed by thermal stressing (15 degrees C and 45 degrees C) for 24 hours with a dip cycle of 30 seconds, whereafter a marginal leakage test was performed. The results showed that in enamel cavities, the bonding agents Enamelbond, Heliobond, and Scotchbond significantly reduced marginal leakage compared with Dentin-Adhesit. In the dentinal cavities, Dentin-Adhesit and Scotchbond reduced marginal leakage compared with Enamelbond and Heliobond. No significant difference was noted in the sealing ability of Dentin-Adhesit and Scotchbond. In dentin the P10/Dentin-Adhesit, and Silar/Scotchbond combinations sealed significantly better than P10/Enamelbond.
边缘微渗漏是复合树脂修复体失败的一个原因。在牙釉质和牙本质龋洞中，评估并比较了两种牙釉质粘结剂和两种牙本质粘结剂与复合树脂一起使用时对边缘微渗漏的影响。在350颗拔除的完好人类前磨牙上，分别在颊侧牙釉质和颈部牙本质制备一个洞，并随机分配到粘结剂和复合树脂的组合中。修复体就位后进行抛光，将修复后的牙齿在20摄氏度的蒸馏水和百里酚中保存28天。随后进行热应力测试（15摄氏度和45摄氏度）24小时，浸泡周期为30秒，之后进行边缘微渗漏测试。结果表明，在牙釉质龋洞中，与牙本质粘结剂Dentin-Adhesit相比，牙釉质粘结剂Enamelbond、Heliobond和Scotchbond显著降低了边缘微渗漏。在牙本质龋洞中，与Enamelbond和Heliobond相比，Dentin-Adhesit和Scotchbond降低了边缘微渗漏。Dentin-Adhesit和Scotchbond的封闭能力没有显著差异。在牙本质中，P10/Dentin-Adhesit和Silar/Scotchbond组合的封闭效果明显优于P10/Enamelbond。
