IADR Abstract Archives
Effect of Delaying Toothbrushing During Home Bleaching with Carbamide Peroxide 10% on Enamel Surface Roughness
Objectives: This study aimed to determine the effect of toothbrushing on enamel surface roughness at three different intervals after daily home bleaching treatment. Time interval of brushing teeth are immediately, 1 hour, and 2 hours after home bleaching procedure using carbamide peroxide 10%.
Methods: Twenty enamel slabs were prepared from impacted human third molars that had been extracted surgically and intially evaluated for surface roughness by Stylus Profilometer and then randomly divided into four groups. The bleaching procedure was carried out for 21 days for six hours daily. In each group, the surfaces of specimens were brushed with toothpaste immediately, 1 hour, and 2 hours after bleaching except for the control group. the pecimens were stored in artificial saliva. Enamel surface roughness was again measured at the end of bleaching period (after 21 days). Then the differences between in enamel surface roughness were calculated. Data were analyzed with one way ANOVA and Post hoc.
Results: Test showed statistically significant differences in the means of surface roughness values between the immediately brushed gruop and the three other groups (p<0.001). Daily toothbrushing immediately after bleaching increased enamel surface roughness; however delaying toothbrushing after 1 or 2 hours and exposing the specimens into saliva during the study period produced decreased value of surface roughness.
Conclusions: Within the limitations of this in vitro study, it can be concluded that there are differences on enamel surface roughness at three different time interval on brushing teeth immediately, 1 hour, and 2 hours after home bleaching using 10% carbamide peroxide. Delaying tooth brushing for 1 hour and 2 hours resulted in a lower roughness than the group that brushed immediately. The most significant decrease in roughness visible on the teeth that are brushed after 2 hours soaked in artificial saliva. It has been proved that saliva with longer contact time before brushing teeth reduces surface roughness. The role of saliva and fluoride in toothpaste can affect the surface roughness after home teeth bleaching. Saliva and fluoride helps remineralization process. Calcium and phosphate concentrations that contains in the saliva is a major factor supporting remineralization.
Methods: Twenty enamel slabs were prepared from impacted human third molars that had been extracted surgically and intially evaluated for surface roughness by Stylus Profilometer and then randomly divided into four groups. The bleaching procedure was carried out for 21 days for six hours daily. In each group, the surfaces of specimens were brushed with toothpaste immediately, 1 hour, and 2 hours after bleaching except for the control group. the pecimens were stored in artificial saliva. Enamel surface roughness was again measured at the end of bleaching period (after 21 days). Then the differences between in enamel surface roughness were calculated. Data were analyzed with one way ANOVA and Post hoc.
Results: Test showed statistically significant differences in the means of surface roughness values between the immediately brushed gruop and the three other groups (p<0.001). Daily toothbrushing immediately after bleaching increased enamel surface roughness; however delaying toothbrushing after 1 or 2 hours and exposing the specimens into saliva during the study period produced decreased value of surface roughness.
Conclusions: Within the limitations of this in vitro study, it can be concluded that there are differences on enamel surface roughness at three different time interval on brushing teeth immediately, 1 hour, and 2 hours after home bleaching using 10% carbamide peroxide. Delaying tooth brushing for 1 hour and 2 hours resulted in a lower roughness than the group that brushed immediately. The most significant decrease in roughness visible on the teeth that are brushed after 2 hours soaked in artificial saliva. It has been proved that saliva with longer contact time before brushing teeth reduces surface roughness. The role of saliva and fluoride in toothpaste can affect the surface roughness after home teeth bleaching. Saliva and fluoride helps remineralization process. Calcium and phosphate concentrations that contains in the saliva is a major factor supporting remineralization.