Reeves G W, Fitchie J G, Scarbrough A R, Hembree J H
School of Dentistry, University of Mississippi Medical Center, Jackson.
Am J Dent. 1990 Oct;3(5):195-8.
Bonding to dentin with long-term success has been a quest of dentistry for some time. Microleakage is a major problem that can lead to staining and discolorization of the restoration and postoperative sensitivity. Some of the newer dentin bonding systems include Gluma Bond and Scotchbond 2. A glass ionomer/composite "sandwich" technique has also been advocated for dentin bonding. Here a glass ionomer is first bonded to the dentin, bonding agent is applied to the glass ionomer and a composite restoration is then placed into the cavity preparation. The purpose of this study was to compare the microleakage of Gluma Bond, Scotchbond 2, the glass ionomer/composite sandwich technique along with a positive and negative control. This was accomplished, in vitro, using extracted human teeth and a Ca45 radioisotope technique. The teeth were examined for microleakage at periods of 1 week, 6 months and 12 months. The results of this study indicate that, in vitro, the glass ionomer sandwich technique does not stop microleakage. The results also indicate that, in vitro, Gluma Bond and especially Scotchbond 2 restorations can resist microleakage for short periods of time. However, at the end of the 12 months, all Gluma Bond and Scotchbond 2 specimens exhibited gross microleakage.
长期成功地与牙本质粘结一直是牙科领域追求的目标。微渗漏是一个主要问题，可能导致修复体染色和变色以及术后敏感。一些较新的牙本质粘结系统包括Gluma Bond和Scotchbond 2。一种玻璃离子体/复合树脂“三明治”技术也被提倡用于牙本质粘结。在此技术中，首先将玻璃离子体粘结到牙本质上，在玻璃离子体上涂布粘结剂，然后将复合树脂修复体放入窝洞预备中。本研究的目的是比较Gluma Bond、Scotchbond 2、玻璃离子体/复合树脂三明治技术以及阳性和阴性对照的微渗漏情况。这是在体外使用拔除的人类牙齿和Ca45放射性同位素技术完成的。在1周、6个月和12个月时检查牙齿的微渗漏情况。本研究结果表明，在体外，玻璃离子体三明治技术并不能阻止微渗漏。结果还表明，在体外，Gluma Bond尤其是Scotchbond 2修复体在短时间内可以抵抗微渗漏。然而，在12个月末，所有Gluma Bond和Scotchbond 2标本都出现了明显的微渗漏。
