OBJECTIVE This clinical study evaluated the color longevity after one-year of at-home bleaching with 10% carbamide peroxide (CP) in smokers and nonsmokers. METHODS Sixty patients, 30 smokers and 30 non-smokers were subjected to bleaching with 10% CP during three hours daily for three weeks. The color was measured at baseline and one week, one month and one year after the completion of dental ...

This study was conducted to determine the effect of 15% carbamide peroxide bleaching agent on color change and surface topography of different composite veneering materials (Filtek Z350 (3M ESPE), Esthet X (Dentsply India), and Admira (Voco, Germany). Methods. 30 samples were fabricated for evaluation of color change using CIELAB color system and Gonioreflectometer (GK 311/M, ZEISS). 45 disc-sh...

Tooth whitening has become increasingly popular; according to the American Academy of Cosmetic Dentistry, Americans spend 1.4 billion dollars per year on tooth whitening. There are several approaches including use abrasives for mechanical removal material, colorants, and oxidation chromophores that make stains [1,2].

After reading this article, the reader should be able to: • describe the process of nightguard vital bleaching and discuss indications and contraindications. • list the situations amenable to at-home whitening, including extended bleaching times for tetracyclinestained teeth. • explain how to treat side effects, such as tooth sensitivity during whitening. • discuss treatment options for a singl...

Two independent mol-ecules comprise the asymmetric unit in the title thio-carbamide derivative, C(10)H(13)NOS. These differ in the relative orientations of terminal ethyl groups [C-C-C-O torsion angles = -66.95 (13) and 55.92 (13)°, respectively]. The phenyl ring is twisted out of the plane of the central residue [C(q)-N-C(ph)-C(ph) = -146.20 (12) and -144.15 (12)°, respectively; q = quaternary...

Enzymes, fluorochromes and other marker molecules are commonly used in a variety of applications to provide specific detection signals. To this aim, they may be conjugated to antibodies, avidin, protein A or G and other proteins in many ways. Fundamental work on chemical modification of proteins and antibody labelings has already been done long before AH COONS and co-workers employed those tech...

Methods: Three concentrations of carbamide peroxide (10%, 16%, and 22%) used in home bleaching techniques were evaluated regarding their cytotoxic effect on gingival tissues. The materials were divided into three groups as follows: Group C10 (White Gold Home 10%, Dentsply), Group C16 (White Gold Home 16%, Dentsply, and Group C22 (Nite White 22%, ACP Discus Dental). The cytotoxicity essay was ca...

184 When our first article appeared in 1989 introducing nightguard vital bleaching (at-home bleaching) in a tray using 10% carbamide peroxide to the world,1 we never imagined the impact this simple procedure would have on the profession and the public. As this technique became accepted as safe and effective, other frontiers were explored. Companies introduced higher concentrations of carbamide ...