The results of this meta- analysis showed no significant changes in enamel microhardness when using the 10 % carbamide peroxide bleaching gel over periods of 7 , 14 and 21 days
Several studies have investigated the effect of bleaching on dental tissues .
The evaluation of the effect of home bleaching with 10 % carbamide peroxide is important for assessing alterations in enamel microhardness that may affect dental health in terms of resistance to masticatory forces .
This meta- analysis was performed in order to determine scientific evidence regarding the effects of home vital bleaching with 10 % carbamide peroxide gel on the microhardness of human dental enamel .
Microhardness of demineralized enamel following home bleaching and laser-assisted in office bleaching
Background There is little data regarding the effect of tooth whitening on microhardness of white spot lesions . This study was conducted to investigate the effect of home-bleaching and laser-assisted in-office bleaching on microhardness of demineralized enamel . Material and Methods Forty bovine incisors were selected and immersed in a demineralizing solution for 12 weeks to induce white spot lesions . Enamel blocks were prepared and r and omly assigned to two groups of 20 each . The first group underwent home bleaching with 15 % carbamide peroxide which was applied for 8 hours a day over a period of 15 days . In the second group , in-office bleaching was performed by 40 % hydrogen peroxide and powered by irradiation from an 810 nm gallium-aluminum-arsenide ( GaAlAs ) diode laser ( CW , 2W ) . This process was performed for 3 sessions every seven days , in 15 days . The specimens were stored in Fusayama Meyer artificial saliva during the experiment . Surface microhardness was assessed before and after the bleaching therapies in both groups . Results Microhardness decreased significantly following both home bleaching and laser-assisted in-office bleaching ( p<0.05 ) . There were no significant differences in hardness values among the two groups either before ( p=0.131 ) or after ( p=0.182 ) the bleaching procedures . Conclusions Tooth whitening through home bleaching or laser-assisted in-office bleaching can result in a significant reduction in microhardness of white spot lesions . Therefore , it is suggested to take protective measures on bleached demineralized enamel . Key words : White spot lesion , bleaching , laser , microhardness , demineralized enamel , home bleaching , in-office bleaching
The results of this meta- analysis showed no significant changes in enamel microhardness when using the 10 % carbamide peroxide bleaching gel over periods of 7 , 14 and 21 days
Several studies have investigated the effect of bleaching on dental tissues .
The evaluation of the effect of home bleaching with 10 % carbamide peroxide is important for assessing alterations in enamel microhardness that may affect dental health in terms of resistance to masticatory forces .
This meta- analysis was performed in order to determine scientific evidence regarding the effects of home vital bleaching with 10 % carbamide peroxide gel on the microhardness of human dental enamel .