Bleaching Efficacy of Carbamide Peroxide, Fluoridated Carbamide Peroxide against Nanohydroxyapatite Reinforced Carbamide Peroxide-An In Vitro Study
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Aim: This study was conducted to comparatively evaluate the bleaching efficacy of Carbamide Peroxide, Fluoridated Carbamide Peroxide and Nanohydroxyapatite reinforced Carbamide Peroxide.
Material and Methodology: An in-vitro experimental study was carried out on 18 sound human maxillary fully erupted Premolars extracted stored in phosphate buffer saline solution (PBS). They were segregated in to 3 Groups (Group I , Group II and Group II) consisting of 6 samples in each group. Their UV transmission wavelengths between 380-780 were determined using Spectrophotometer. The samples of the three groups were subjected to bleaching treatments with 10% Carbamide Peroxide, Fluoridated Carbamide Peroxide and Nanohydroxyapatite reinforced Carbamide Peroxide respectively. Spectrophotometric analysis was carried out and data were tabulated in Microsoft Excel for transferred to SPSS for analysis.
Results: It was observed that the bleaching procedure significantly changes the enamel translucency, making it opaquer. It was found in our study that Fluoridated Carbamide Peroxide has a superior bleaching efficacy showing a mean value of 0.4 ± 0.88 prior treatment which increased to 3.3 ± 2.32 post treatment with the bleaching agent than Nanohydroxyapatite reinforced Carbamide Peroxide. The efficacy of 10% carbamide peroxide was found to have least efficacy. The study showed that the mean value of samples in group III was the highest (3.3 ± 2.32) followed by group II (1.9±0.43) and group I (1.7 ± 2.26).
Conclusion: Fluoridated Carbamide Peroxide had superior bleaching effect compared with Nanohydroxyapatite reinforced Carbamide Peroxide.10% carbamide peroxide was found to have the least efficacy than other combinations
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