Abstract Effect of bleaching agents on untreated and erosively damaged dental enamel samples |
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present in vitro study aimed to evaluate the effect of bleaching agents with
varying concentrations (7.5 - 13.5 % hydrogen peroxide, 35 % carbamide
peroxide) and pH-values (4.9 - 10.8) on enamel samples. Besides their effect on
untreated enamel surfaces, the bleaching agents were also tested on erosively
damaged enamel samples. Analytic measures were the documentation of surface
roughness by perthometer and the quantitative elementary analysis by an
electron probe micro-analyzer. The study demonstrated that acidic bleaching
agents and high peroxide concentration resulted in a significant increase of
surface roughness and mineral loss. If the enamel surface has been previously
exposed to erosive agents, subsequent bleaching may enhance damage of the
dental hard tissue. Patients with erosive defects who wish to have a tooth
bleaching must be informed about possible complications and damage of the tooth
surface. Key words: In-vitro-study, bleaching agents, dental erosion, surface roughness, electron probe micro-analyzer |
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