Akademik Veri Yönetim Sistemi
American Journal of Dentistry, cilt.15, sa.3, ss.153-158, 2002 (SCI-Expanded)
Purpose: To assess the marginal seal of Class II resin-based composite restorations cured by a high intensity halogen light or a plasma arc light. Materials and Methods: Class II cavities were prepared in extracted molar teeth with cervical margins located apical to the cemento-enamel junction. Cavities were restored with a posterior resin-based composite (Tetric Ceram) using either a two-increment or a bulk placement and cure restorative technique after application of bonding agent (Excite). Test parameters included light unit type/curing mode, application of flowable composite and restorative technique. After thermocycling, the teeth were immersed in basic fuchsin dye. Sectioned restorations were examined under a stereomicroscope (× 25) and extent of microleakage (mm) was recorded using an image analysis system. Data was analyzed by non-parametric statistical tests. Results: No leakage was observed at the occlusal enamel margin of any restoration. Median gingival leakage values for the different test groups ranged from 0.02-2.51 mm. Light unit type had a highly significant effect on leakage (P= 0.0002). The highest leakage scores were recorded with the plasma arc light used in standard curing mode and the lowest with the halogen light in turbo-boost mode.