IMPACT OF BLEACHING GELS ON DENTAL ENAMEL MICROHARDNESS AND 3D SURFACE ROUGHNESS

Q. D. Tran(a), K. Manas(a), E. Svoboda(a), M. Bumbalek(b), and Z. Joska(a) ((a)Department of Mechanical Engineering, University of Defence in Brno, (b)Department of Dental Care, Faculty of Medicine, Masaryk University): Impact of Bleaching Gels on Dental Enamel Microhardness and 3D Surface Roughness The aim of this study was to characterize the effect of two different bleaching gels (with 22 % carbamide peroxide and with 35 % hydrogen peroxide) on the surface roughness and microhardness of enamel. Bleaching gels were applied according to manufacturer's instructions. For characterization of surface microhardness and 3D surface roughness, non contact 3D profilometer Talysurf CLI 1000 and Vickers microhardness method were used. The results of surface microhardness did not show significant changes from baseline for both gels. 3D surface roughness parameters showed that "in home" gel with 22 % carbamide peroxide caused bigger changes of enamel topography than "in office" gel with 35 % hydrogen peroxide.