Scott J A, Saunders W P, Strang R
Department of Conservative Dentistry, Glasgow Dental Hospital and School, Scotland, UK.
Am J Dent. 1992 Aug;5(4):177-80.
This study investigated the marginal seal of resin composite inlays in dentin and enamel when either unfilled resin or a second or third generation dentin bonding agent is used. Standardized mesial and distal inlay cavities were cut in 135 human third molar teeth. The teeth were randomly divided into 9 groups and inlays fabricated in a hybrid resin composite inlay material. Each group of teeth was then treated with one of 8 dentin bonding agents or an unfilled resin and cemented with a dual curing resin cement. Each group was stored in deionized water for 1 week, thermocycled between 5 degrees C, 37 degrees C and 55 degrees C for 500 cycles, then placed in 2% methylene blue solution for 15 hours. Following this the teeth were sectioned and scored for the degree of leakage observed. Marginal microleakage was minimal at enamel margins, however there was marked leakage, even when a dentin bonding agent was used, on the dentin side. Only two dentin bonding agents proved more effective than unfilled resin and in only one case was the leakage not significantly worse than in enamel.
本研究调查了使用未填充树脂或第二代或第三代牙本质粘结剂时，树脂复合体嵌体在牙本质和釉质中的边缘封闭情况。在135颗人类第三磨牙上制备标准化的近中及远中嵌体洞形。将牙齿随机分为9组，用混合树脂复合体嵌体材料制作嵌体。然后，每组牙齿分别用8种牙本质粘结剂之一或未填充树脂进行处理，并用双固化树脂水门汀粘结。每组牙齿在去离子水中储存1周，在5℃、37℃和55℃之间进行500次热循环，然后置于2%亚甲蓝溶液中15小时。之后将牙齿切片，并对观察到的渗漏程度进行评分。釉质边缘的边缘微渗漏最小，但即使使用牙本质粘结剂，牙本质侧仍有明显渗漏。只有两种牙本质粘结剂比未填充树脂更有效，且仅在一种情况下渗漏不比釉质中的明显更严重。
