El Shafie, M., Ghali, L., Taha, R. (2016). The Effect of Newly Introduced Bleaching Agent Listerine versus the Conventional Carbamide Peroxide on the Ultrastructure and Microhardness of Tooth Enamel. Suez Canal University Medical Journal, 19(1), 87-99. doi: 10.21608/scumj.2016.43985
Marwa F El Shafie; Laila S Ghali; Rasha M Taha. "The Effect of Newly Introduced Bleaching Agent Listerine versus the Conventional Carbamide Peroxide on the Ultrastructure and Microhardness of Tooth Enamel". Suez Canal University Medical Journal, 19, 1, 2016, 87-99. doi: 10.21608/scumj.2016.43985
El Shafie, M., Ghali, L., Taha, R. (2016). 'The Effect of Newly Introduced Bleaching Agent Listerine versus the Conventional Carbamide Peroxide on the Ultrastructure and Microhardness of Tooth Enamel', Suez Canal University Medical Journal, 19(1), pp. 87-99. doi: 10.21608/scumj.2016.43985
El Shafie, M., Ghali, L., Taha, R. The Effect of Newly Introduced Bleaching Agent Listerine versus the Conventional Carbamide Peroxide on the Ultrastructure and Microhardness of Tooth Enamel. Suez Canal University Medical Journal, 2016; 19(1): 87-99. doi: 10.21608/scumj.2016.43985
The Effect of Newly Introduced Bleaching Agent Listerine versus the Conventional Carbamide Peroxide on the Ultrastructure and Microhardness of Tooth Enamel
1Department of Oral Biology, Faculty of Dentistry, Suez Canal University, Egypt
2Department of Oral Biology, Faculty of Oral and Dental Medicine, Cairo University, Egypt.
Abstract
Background: Tooth bleaching is one of the most conservative and cost-effective dental treatments to enhance a person’s smile. Aim: The aim of this study was to evaluate the effect of the newly introduced prebrush bleaching agent Listerine versus carbamide peroxide on the ultrastructure and micro-hardness of the enamel.Materials and Methods: Thirty non-carious sound human premolars extracted for orthodontic reasons. Teeth samples were divided equally into three groups. Group Ӏ served as control group where specimens were immersed in artificial saliva, group ӀӀ treated with 22% carbamide peroxide for 5 sessions per day 15 minutes for 60 days and group ӀӀӀ treated with Listerine pre-brush rinse for 5 sessions per day 15 minutes for 60 days, in between the sessions teeth were kept in artificial saliva. At the end of the experiment, all teeth were hemi-sectioned longitudinal in mesio-distal direction to form 60 specimens. The lingual halves of all the groups were used for measuring enamel micro-hardness, while buccal halves were examined by scanning electron microscope (SEM) to detect any ultrastructural changes of enamel of the different groups. Results: SEM results showed morphological alterations on the enamel surface of group ӀӀ and group ӀӀӀ compared with control group Ӏ as appeared surface pitting, porosity, irregularity, roughness, craters like depression and micro-cracks. Results of enamel surface micro-hardness showedno significant differences were found among the bleaching groups (ӀӀ-ӀӀӀ) (p=0.371). However, all bleaching agents produced a significant increase in the mean value of micro-hardness of enamel compared to the untreated control group (Ӏ) as there are highly significant between group Ӏ and other groups as group ӀӀ (p=0.003) and group ӀӀӀ (p=0.026). Conclusion bleaching abuse had a negative influence on the morphology of enamel and its micro-hardness. The home dental bleaching should be done with caution.
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