IADR Abstract Archives
The Effect of Desensitizers on Microleakage of Cass V Resin Composite Restorations
Objectives: The aim of this in vitro study was to evaluate the effect of desensitizer application on the microleakage of composite resins.
Methods: Class V cavities were prepared on the buccal surfaces of fifty extracted human third molars. 50 box-shaped cavities were divided into 5 groups, based on the desensitizers used (n=10). All teeth were restored with the same bonding agent and composite material. In the control group, no desensitizer was applied. In the experimental groups, Bisblock, Gluma, Duraphat and bonding agent (Single Bond Universal) were the desensitizers. Desensitizers were applied after composite restorations according to the manufacturer’s instructions. All specimens were thermocycled, immersed in 0.5 % basic fuchsin dye for 24 hours,sectioned into two equal halves, evaluated for microleakage using stereomicroscope at a x 30 magnification and scored on a scale of 0-3. Data were analyzed using Kruskal- Wallis tests at the significance level of 0.05.
Results: There were no significant differences by post treatment with desensitizers on microleakage of composite resin restorations. However, based on the numerical values in our study, duraphat group showed lower microleakage at the occlusal margin, bisblock and bonding group showed lower microleakage at the gingival margin than control group.
Conclusions: The application of desensitizers as a post treatment option could be considered as an advisable procedure in order to minimize microleakage .
Methods: Class V cavities were prepared on the buccal surfaces of fifty extracted human third molars. 50 box-shaped cavities were divided into 5 groups, based on the desensitizers used (n=10). All teeth were restored with the same bonding agent and composite material. In the control group, no desensitizer was applied. In the experimental groups, Bisblock, Gluma, Duraphat and bonding agent (Single Bond Universal) were the desensitizers. Desensitizers were applied after composite restorations according to the manufacturer’s instructions. All specimens were thermocycled, immersed in 0.5 % basic fuchsin dye for 24 hours,sectioned into two equal halves, evaluated for microleakage using stereomicroscope at a x 30 magnification and scored on a scale of 0-3. Data were analyzed using Kruskal- Wallis tests at the significance level of 0.05.
Results: There were no significant differences by post treatment with desensitizers on microleakage of composite resin restorations. However, based on the numerical values in our study, duraphat group showed lower microleakage at the occlusal margin, bisblock and bonding group showed lower microleakage at the gingival margin than control group.
Conclusions: The application of desensitizers as a post treatment option could be considered as an advisable procedure in order to minimize microleakage .