OBJECTIVES The effect of 15% carbamide peroxide bleaching gel on color stability and surface topography of a giomer and a microfilled composite resin was evaluated in the present in vitro study. STUDY DESIGN Forty discs measuring 10 mm in diameter and 1 mm in thickness were prepared from a giomer and a microfilled composite resin. Each material yielded 20 discs with completely smooth surfaces...

The wide use of dental bleaching treatment has brought concern about the possible effects of hydrogen peroxide on dental tissue and restorative materials. The objective of this study was to evaluate in vitro the effect of nightguard bleaching on the surface roughness of dental ceramics after different periods of bleaching treatment. Fifteen specimens of 5 × 3 × 1 mm were created with three dent...

OBJECTIVES The present study aimed to investigate the effect of staining solutions on microhardness and shade changes of a nanofilled resin composite, which had been previously in contact with bleaching agents. MATERIALS AND METHODS A total of 135 disk-shaped specimens (10 mm × 2 mm) were fabricated with a nanofilled resin (Filtek Supreme) and photocured with a Light Emission Diode (LED) unit...

OBJECTIVES Bleached enamel is more susceptible to staining, and application of remineralizing agents may decrease enamel susceptibility to staining. This study sought to assess the effect of casein phosphopeptide amorphous calcium phosphate (CPP-ACP) on enamel susceptibility to staining during bleaching treatment. MATERIALS AND METHODS Forty central and lateral incisors and first premolar tee...

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...

Objectives. Controversial reports exist whether bleaching agents cause a susceptibility to demineralization. The aim of this study was to compare the calcium loss of enamel treated with different bleaching agents and activation methods. Method and Materials. The specimens obtained from human premolars were treated in accordance with manufacturer protocols; 10% carbamide peroxide, 38% hydrogen p...

1 2 Background: Application of topical fluoride agents has been shown to be the most effective method in 3 treating demineralized enamel after in-office bleaching treatments. Thus, this study aimed to examine the 4 effects of two different post-bleaching fluoridation agents (1.5% titanium tetrafluoride and 2.1% sodium 5 fluoride) on the calcium loss of enamel after an acidic challenge. 6 Method...

Recent years have witnessed a drastic increase in the awareness towards cosmetic dentistry. Bleaching has become a common procedure in the field of cosmetic dentistry. Thus, it seems important to determine whether bleaching would significantly influence the bond strength of orthodontic adhesives to the enamel surface. The purpose of this study was to determine the effect of a 35% hydrogen perox...