Wedad Y. Awliya, BDS, MSC
College of Dentistry, King Saudi University, P.O. Box 106409, Riyadh 11666, Saudi Arabia

The microleakage of three compomers restorative materials (Hytac, Dyract and F2000) was evaluated and compared to that of Z 100 composite resin. Ten restorations from each material were placed in Class V cavities in bovine incisors according to manufacturer's instructions. All cavities were prepared with 90-degree cavosurface margins and were located at the cemento-enamel junction. After immersion in 2% basic fuchsin dye, the teeth were sectioned longitudinally in a bucco-lingual direction using a diamond saw. Each section was then inspected under a stereomicroscope. Microleakage in human teeth using one compomer and Z 100 composite resin was also determined. The results showed that the three compomers had different microleakage behavior or the composite resin completely prevented microleakage. At the incisal wall F2000 showed better seal than the other two compomers. However, F2000 showed significantly lesser seal at the gingival wall than Z100 and Dyract. When microleakage results of F2000 and Z100 in bovine and human teeth were compared, no significant difference was found. This indicated the reliability of using bovine teeth in microleakage studies.


Saudi Dental Journal 1999;11(2):65-69.