Evaluation the immediate and delayed micro-leakage of three restorative materials to fill class II cavities in molar teeth
Keywords:
micro-leakage, fill class II cavities, molar teethAbstract
Aim: The current research aimed to evaluate the Immediate and Delayed micro-leakage of three restorative materials (Group I: Activa™ BioActive, Group II: Tetric N Ceram Bulk fill, and Group III: Ever X Posterior) in Class II cavities. Method: 30 human permanent lower molars were selected to be utilized in the current research. Class II cavities in the mesial surface were prepared. After that, the molars were randomly split into the three main investigational groups according to the type of composite restoration (n=10) teeth for each group. Next, two subgroups (n=5) were created from every main group; subgroup 1 immediate leakage test (without storage) and the molars specimens within subgroup 2 delayed leakage test (were kept in normal saline for 28 days within the incubator at 37 °C ± 1°C and relative humidity 95%.): Group I: Activa™ BioActive, Group II: Tetric N Ceram Bulk fill, and Group III: Ever X Posterior. Every tooth specimen was subjected to 1000 heat cycles with a dwell time of 30 seconds among 5° and 55°C. Then, the specimens were immersed in a 1% aqueous solution of methylene blue dye for 8 hours. Three millimeters below the cement-enamel interface, the roots of the teeth were cut.
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