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Preparation and characterization of calcium-shellac spheres as a carrier of carbamide peroxide

Journal of Microencapsulation, 2008
This paper describes a novel approach to prepare and characterize calcium-shellac spheres as a carrier of a tooth whitening agent carbamide peroxide. Calcium-shellac spheres were prepared using an extrusion technique based on dropping aqueous ammonium shellac solution into calcium chloride solution.
Zhibing Zhang
exaly   +4 more sources

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Demineralization effects of 10 percent carbamide peroxide

Journal of Dentistry, 1996
The purpose of this in vitro study was to measure the amount of calcium lost from enamel exposed to a 10% carbamide peroxide solution.Nine teeth (3 incisors, 2 premolars, 4 molars) were sectioned to serve as paired test and control specimens. Each tooth half was coated with wax, leaving a uniform 3 mm x 4 mm window of exposed enamel.
V B Haywood
exaly   +3 more sources

Effect of carbamide peroxide and hydrogen peroxide on enamel surface: an in vitro study

Clinical Oral Investigations, 2010
The aim of the study was to investigate changes in the micromorphologyl and microhardness of the enamel surface after bleaching with two different concentrations of hydrogen peroxide (HP) and carbamide peroxide (CP). Bovine enamel samples were embedded in resin blocks, and polished.
Martin Wolkewitz
exaly   +4 more sources

Effects of three concentrations of carbamide peroxide on the structure of enamel

Journal of Oral Rehabilitation, 2000
Carbamide peroxide bleaching agents have raised important questions on their potential adverse effects on the structure of enamel. The purpose of this study was to examine the effects of three carbamide peroxide bleaching agents in different concentrations (10, 16 and 35%) on the structure of enamel.
Gurgan, SEVİL, Oltu, U
openaire   +4 more sources

Effects of carbamide peroxide on dental luting agents

Journal of Endodontics, 1992
Vital bleaching of natural dentition using a 10% carbamide peroxide in solution may adversely effect restorative materials such as the luting agents. The purpose of this study is to examine surface structure and alterations of atomic weight percentages of elements in (a) zinc phosphate, (b) glass-ionomer, and (c) resin cements after contact with the ...
K L, Jefferson, R B, Zena, B, Giammara
openaire   +2 more sources

Antibacterial activity of 10% carbamide peroxide bleaching agents

Journal of Endodontics, 1996
The antibacterial activity of three commercial 10% carbamide peroxide bleaching agents (Nite White, Karisma, and Opalescence) on Streptococcus mutans, Streptococcus mitis, Streptococcus sanguis, Lactobacillus casei, and Lactobacillus acidophilus was examined. Chlorhexidine (0.2%) was used as a positive control.
Gurgan, SEVİL, Alacam, R, Bolay, S
openaire   +3 more sources

Remineralization Potential of a Fluoridated Carbamide Peroxide Whitening Gel

Journal of Esthetic and Restorative Dentistry, 2006
ABSTRACTPurpose:  Little knowledge exists regarding the potential remineralizing benefits of adding fluoride to carbamide peroxide‐based whitening gels. The aim of this project was to evaluate whether a whitening system with fluoride will remineralize previously demineralized enamel.Materials and Methods:  Twenty‐four extracted teeth were sectioned ...
Jason, Gladwell, Darrin, Simmons, J Timothy, Wright   +2 more
openaire   +2 more sources

Dental bleaching with carbamide peroxide

2021
Os autores apresentam revisão bibliografia e situações clínicas envolvendo a técnica do clareamento com o emprego do perióxido de carbamida como agente clareador.
Machado, Eliana S., Frasca, Luis Carlos da F.   +1 more
openaire   +1 more source

Penetration of the pulp chamber by carbamide peroxide bleaching agents

Journal of Endodontics, 1992
Hydrogen peroxide readily penetrates the pulp chamber of freshly extracted teeth. This study was undertaken to determine whether carbamide peroxide also penetrates the pulp chamber. Freshly extracted teeth were sectioned 2 to 3 mm apical to the cementoenamel junction and the coronal pulpal tissue was removed.
J S, Cooper, T J, Bokmeyer, W H, Bowles
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Radicular peroxide penetration from carbamide peroxide gels during intracoronal bleaching

International Endodontic Journal, 2008
AbstractAim  To evaluate and compare radicular peroxide diffusion from different concentrations of carbamide peroxide bleaching gels.Methodology  Fifty maxillary premolar teeth were separated into five groups (n = 10). Standardized endodontic access cavities were prepared in the occlusal surfaces, and the root canals were prepared using a step back ...
O, Gökay, F, Ziraman, A, Cali Asal, O M, Saka   +3 more
openaire   +2 more sources