Evaluation of effectiveness of whitening agents developed with different delivery systems and that effects on the applied surfaces

The aim of this in vitro study is using chitosan, a natural material, instead of carbopol carrier whitening gel for to achieve effective bleaching and to minimize enamel surface changing during whitening process at the same time. Fourty four extracted human maxillary central incisors were selected and divided into four groups. Their enamels examination with SEM-EDX (Energy-dispersive x-ray spectroscopy ) and teeth is going to record using a dental contact spectrophotometer. Two groups are going to bleach with used in routine gels %16 carbamide peroxide gel (Opalescence home bleaching kit, Ultradent Products) and %6 hydrogen peroxide (Opalescence Go home bleaching kit, ) gel (n=11), other two groups is going to bleach with our preparations which contain % 6 hyrogen peroxide and chitosan and is going to bleach with our preparations which contain %16 carbamide peroxide and chitosan. And same procedure is going to use same begining which examination with SEM-EDX and is going to record using dental contact spectrophotometer. Values are going to calculate as ΔE, L*,a*,b* and the data is statistically analyzed (p<0.05). There is no statistically difference among other groups about colour change and demineralization values. On the other hand carbamide peroxide + chitosan has the best results on colour change and has less deminaralization values.