الفهرس | Only 14 pages are availabe for public view |
Abstract This study aimed to evaluate the effect of ethanolic extract of propolis (EEP) addition on resin based dental sealant with 10% concentration as regard; Antibacterial effect on streptococcus mutans, Shear bond strength and Microleakage, in comparison to fluoride releasing sealant and Conventional (fluoride-free) resin-based pit and fissure sealant. In the present study, a total number of 209 specimens were prepared, for each test three groups were formed; group I was resin-based P&F sealant containing 10% EEP, group II was fluoride releasing resin-based P&F sealant and group III was conventional resin-based P&F sealant. For the antibacterial test 90 specimens were prepared, 30 in each group for the different time intervals. For the measurement of the total flavonoid and fluoride ion release, 100 specimens were prepared, 50 specimens in each test (5 specimens for each time interval). For the shear bond strength test, 45 specimens were prepared, 15 specimens in each group. And finally, for the microleakage test, 24 specimens were prepared 8 in each group. Regarding FTIR, it was found that new bands were detected in the FTIR spectra of the resin-based P&F sealant modified with 10% EEP which confirms that there was a chemical bond formed between sealant and EEP. In the antibacterial test, the modified resin-based P&F sealants with 10% EEP showed a statistically significant difference when compared to the conventional resin-based P&F sealant and the fluoride resin-based sealants within all time intervals. Where, the highest mean value was found in group I after 1 dayof incubation while the lowest mean value was found in group III after 7, 14, 21 and 30 days of incubation. Regarding the total flavonoid release test, there was an elevation in the amount of flavonoids released by increasing time. Where, the highest flavonoid release was after thirty days (2922.9 ppm) and the least one was after the first day (1860.4 ppm). While regarding the fluoride ion release test, there was a decrease in the amount of fluoride recorded by increasing time. Where, the highest fluoride release was after the first day (6.03 ppm) and the least one was after thirty days (0.08 Regarding the shear bond strength test, the modified resin-based P&F sealants with 10% EEP showed a significant difference when compared to the conventional resin-based P&F sealant and the fluoride resin-based sealants. where the highest mean value was found in group I followed by group III and the least mean value was found in group II. While, in the microleakage test, the modified resin-based P&F sealants with 10% EEP was the only group that showed a statistically significant difference in the same group between the different scores. Score 0 showed significant difference when compared to both scores 1 & 2. |