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Influence of Bleaching Agents on Surface Roughness of Sound or Eroded Dental Enamel Specimens
Author(s) -
AZRAK BIRGÜL,
CALLAWAY ANGELIKA,
KURTH PETRA,
WILLERSHAUSEN BRITA
Publication year - 2010
Publication title -
journal of esthetic and restorative dentistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.919
H-Index - 60
eISSN - 1708-8240
pISSN - 1496-4155
DOI - 10.1111/j.1708-8240.2010.00372.x
Subject(s) - enamel paint , hydrogen peroxide , surface roughness , tooth whitening , carbamide peroxide , dentistry , materials science , dental enamel , surface finish , peroxide , nuclear chemistry , chemistry , composite material , medicine , biochemistry , organic chemistry
ABSTRACT Purpose: The aim of the present in vitro study was to assess the effect of bleaching agents on eroded and sound enamel specimens. Materials and Methods: Enamel specimens prepared from human permanent anterior teeth were incubated with different bleaching agents containing active ingredients as 7.5 or 13.5% hydrogen peroxide or 35% carbamide peroxide, ranging in pH from 4.9 to 10.8. The effect of the tooth whitening agents on surface roughness was tested for sound enamel surfaces as well as for eroded enamel specimens. To provoke erosive damage, the enamel specimens were incubated for 10 hours with apple juice (pH = 3.4). Afterwards, pretreated and untreated dental slices were incubated with one of the bleaching agents for 10 hours. The surface roughness (R a ) of all enamel specimens ( N = 80) was measured using an optical profilometric device. A descriptive statistical analysis of the R a values was performed. Results: The study demonstrated that exposure to an acidic bleaching agent (pH = 4.9) resulted in a higher surface roughness ( p = 0.043) than treatment with a high peroxide concentration (pH = 6.15). If the enamel surface was previously exposed to erosive beverages, subsequent bleaching may enhance damage to the dental hard tissue. Conclusion: Bleaching agents with a high concentration of peroxide or an acidic pH can influence the surface roughness of sound or eroded enamel. CLINICAL SIGNIFICANCE Patients with erosive defects who wish to receive a tooth bleaching treatment must be informed about possible complications and damage to the tooth surface. However, extrapolation of in vitro results to clinical situations is limited. ( J Esthet Restor Dent 22:391–401, 2010)