Saunders W P, Grieve A R, Russell E M, Alani A H
Department of Conservative Dentistry, Dental School, University of Dundee, U.K.
J Oral Rehabil. 1990 Nov;17(6):519-27. doi: 10.1111/j.1365-2842.1990.tb01423.x.
The aim of this study was to compare the effects upon marginal leakage of a number of dentine bonding agents: Gluma, Scotchbond, Topaz and an experimental material when used with a posterior composite resin, Occlusin. The results were also compared with composite used without a dentine bonding agent and 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 3 months and then thermally cycled. Marginal leakage was subsequently determined using a radioactive isotope containing 45Ca, and an autoradiographic 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 non-bevelled type. The use of dentine bonding agents did not improve the marginal seal of the composite restorations, and the glass ionomer restorations showed significantly less leakage than the composite resin and dentine bonding agent combinations.
本研究的目的是比较多种牙本质粘结剂（Gluma、Scotchbond、Topaz和一种实验材料）与后牙复合树脂Occlusin联合使用时对边缘渗漏的影响。还将结果与未使用牙本质粘结剂的复合树脂以及玻璃离子水门汀Chemfil II进行了比较。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，将牙齿保存长达3个月，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测定边缘渗漏情况。采用图像分析确定每个标本的线性渗漏总量。结果表明，在每个时间间隔，所有材料均出现了一定程度的渗漏。有斜面的洞型设计比无斜面的洞型渗漏明显更少。使用牙本质粘结剂并未改善复合树脂修复体的边缘封闭性，并且玻璃离子水门汀修复体的渗漏明显少于复合树脂与牙本质粘结剂组合。
