An evaluation of the effect of modified carisolv gel with different time of application on micro leakage of repaired light cured composite restoration

الملخص EN

Background : the aim of this study was to assess the effect of modified Carisolv gel on micro leakage of repaired light cured composite restoration with different time of application (5, 10 and 15) minutes. Materials and methods: Twenty eight specimens were prepared using translucent plastic mold of dimension (8 mm diameter and 2.5 mm depth), divided into 4 groups according to application time of Carisolv gel.

All specimens treated with phosphoric acid 35 % followed by Swisstec SL bond, GA (Carisolv 5 minutes + Swisstec total etch bond), GB (Carisolv 10 minutes + Swisstec total etch bond), GC (Carisolv 15 minutes + Swisstec total etch bond), GD control group using Swisstec total etch bond without using of Carisolv gel.

All specimens were stored in artificial saliva solution for one month, finishing of composite surface with coarse aluminum oxide abrasive disc, repair has been done for all specimens, thermo cycling between two water baths (5 ± 2 and 55 ± 2) °C has been done.

Specimens were stored in bottles containing metylene blue dye for 2 days, sectioned with a special sectioning device. Micro leakage was analyzed by reading the linear penetration of the dye in mm using stereomicroscope with a reflected light under the magnification of 4X, data was collected and analyzed using ANOVA and t-test. Results : GC exhibited less micro leakage than GB, and GB showed less micro leakage than GA and GD showed higher micro leakage than other groups Conclusion: Time of Carisolv gel application has a significant effect on micro leakage, increasing exposure time to a certain limit decreases micro leakage.