Grieve A R, Saunders W P, Alani A H
Department of Conservative Dentistry, Dental School, University of Dundee.
J Oral Rehabil. 1993 Jan;20(1):11-8. doi: 10.1111/j.1365-2842.1993.tb01510.x.
The aim of this study was to compare the effects upon marginal leakage of a number of dentine bonding agents when used with a posterior composite resin, Occlusin, after storage for periods of up to 2 years. The bonding agents used were Gluma, Scotchbond, Topaz and an experimental material. The results were compared with a glass ionomer, Chemfil II. Class V cavities with or without a bevelled cavo-surface margin were prepared in the buccal surfaces of extracted premolar teeth. Following restoration, the teeth were stored for periods of up to 2 years and then thermally cycled. Marginal leakage was subsequently demonstrated using a radioactive isotope containing 45Ca, and an auto-radiographic technique. Image analysis was used to determine the total amount of linear leakage for each specimen. The results showed that some leakage occurred for all materials at each time interval. The bevelled design of cavity allowed significantly less leakage than the unbevelled cavity. Overall, there was little difference between the various dentine bonding agents. The glass ionomer restorations showed significantly less leakage than the composite resin and dentine bonding agent combinations in unbevelled cavities.
本研究的目的是比较多种牙本质粘结剂与一种后牙复合树脂Occlusin联合使用并储存长达2年时间后，对边缘渗漏的影响。所用的粘结剂有Gluma、Scotchbond、Topaz和一种实验材料。将结果与玻璃离子粘固剂Chemfil II进行比较。在拔除的前磨牙颊面制备有或无斜面洞缘的V类洞。修复后，将牙齿储存长达2年，然后进行热循环。随后使用含45Ca的放射性同位素和放射自显影技术显示边缘渗漏情况。采用图像分析确定每个标本的线性渗漏总量。结果显示，在每个时间间隔，所有材料均出现了一定程度的渗漏。有斜面设计的洞比无斜面的洞渗漏明显更少。总体而言，各种牙本质粘结剂之间差异不大。在无斜面的洞中，玻璃离子修复体的渗漏明显少于复合树脂与牙本质粘结剂的组合。
