Tooth bleaching is one of the most popular cosmetic dental procedures opted by patients who desire pleasing smile. It simplest, least invasive means available to lighten discolored vital teeth. A number desensitizing agents have been tried in an attempt counteract bleaching-related sensitivity. This study was done compare effect two different for controlling post operative sensitivity after pow...

CONTEXT The possibility of bleaching vital teeth with peroxide-based products considerably revolutionized esthetic dentistry. AIM The aim of this clinical study was to evaluate tooth color change and dental sensitivity after exposure to preloaded film containing a 10% hydrogen peroxide whitening system (Opalescence Trθswhite Supreme). MATERIALS AND METHODS A total of 13 volunteers, aged 18 ...

Background: Dental sensitivity is a common secondary effect related to vital tooth whitening (VTW) treatment and it’s associated with the concentrations time of application bleaching agents. The aim this research was evaluate relationship dental combinations different peroxides [hydrogen peroxide (HP) 10%/HP 40%] in order define protocol that effective, while minimizing discomfort experienced b...

Absract : The discoloration of teeth on front part form fundamental aesthetic problemes. In order to treat this kinds of teeth, different methods have been used. Yet the most conservatif one is intracoronal bleaching technique. Various agents such as sodium perborate, hydrogen peroxide, carbamide peroxide and sodium perborate have been used as bleaching agent. 30% of hydrogen peroxide has been ...

OBJECTIVES To review current knowledge of tooth whitening with respect to external bleaching methods. DATA The scope is the external bleaching of vital teeth and focuses on mechanisms; in vivo and in vitro measurement methods, and factors influencing the efficacy of the whitening process. SOURCES "Medline" and "ISI Web of Science" databases from 1966 and 1974, respectively were searched ele...

Considering the importance of bleaching earth with activated carbon in reduction of impurities in vegetable oils, this study was conducted to investigate the effects of bleaching process on physicochemical properties of the bleached soybean oil. The bleaching process was carried out with bleaching earth (1 % w/w) containing different concentrations of activated carbon (0.1 % up to 0.5 % w/w). T...

AIM To develop and evaluate a reproducible intrinsic discolouration model in vitro, based on tea, which would allow the effectiveness of bleaching to be evaluated. METHOD The crown portions of extracted human third molars were sectioned bucco-lingually in half. Colour assessments were made at baseline, post staining and post whitening using a standard clinical shade guide (SG), a shade vision...

Tooth discolouration results from varied and complex causes that are usually classified as being either intrinsic or extrinsic in nature. Extrinsic discoloration arises when external chromogens are deposited on the tooth surface or within the pellicle layer. Intrinsic discoloration occurs when the chromogens are deposited within the bulk of the tooth (usually in the dentine) and are often of sy...