Tooth bleaching is a common treatment for the amelioration of aesthetic discoloured teeth. In this context, there are two approaches that employ concentrated solutions (30–40 wt.%) either hydrogen peroxide or carbamide as agents. However, an ongoing debate on possible adverse effects these different treatments tooth health, such variation enamel structure, surface morphology, and chemistry, whi...

OBJECTIVE To test the hypothesis that there is no difference between the bracket survival rate of brackets bonded to bleached and unbleached teeth. MATERIALS AND METHODS Thirty-eight patients who required comprehensive orthodontic treatment were included in the study. A split mouth technique was used with one arch exposed to in-office whitening gel containing 38% hydrogen peroxide for 30 minu...

Teeth bleaching cases had increased with people's desire for oral aesthetic; however, bleached teeth would still undertake chewing actions and remineralizing process in saliva. Nanotribological and nanomechanical properties are proper displays for dental performance of bleached teeth. The purpose of the research was to reveal the effect of bleaching and remineralization on the nanotribological ...

OBJECTIVES The aim of the present study was to determine the alteration in human enamel after hydrogen peroxide treatment using FT-IR spectroscopy. It is hypothesized that infrared spectroscopy is capable of showing alterations in human enamel after peroxide treatment and the alteration in enamel is proportional to peroxide concentration. METHODS The effects of 10, 20 and 30% hydrogen peroxid...

OBJECTIVE The aim of this study was to determine the effects of 40% hydrogen peroxide and 15% carbamide peroxide on microhardness and color change of a silorane-based composite resin in comparison with two methacrylate-based composites. MATERIALS AND METHODS Fifty-four disc-shaped specimens (A3 shade) were fabricated of Filtek P90 (P90), Filtek Z350XT Enamel (Z350) and Filtek Z250 (Z250) (3ME...

-The applicability of rapid and precise laser probe analysis of tooth enamel for 6 ~O has been verified, and the method has been applied to different modern herbivores in East Africa. Sampling and pretreatment procedures involve initial bleaching and grinding of enamel to <75 /~m, and elimination of adsorbed water and organic compounds with BrFs. Typical analytical reproducibilities for 0 .5-2 ...