نتایج جستجو برای: enamel bleaching

تعداد نتایج: 16293  

2015
F. Rodrigues A. P. Serro C. G. Figueiredo - Pina

The oral aesthetic medicine has contributed increasingly to correct aesthetic defects in order to respond to the standards of beauty imposed by society. A smile with white teeth is included in these standards. However, due to several factors, such as diet, age and certain vices, the natural color of teeth tends to change. The bleaching of teeth pretends to restore the original color of the teet...

Journal: :Brazilian dental journal 2013
Diana Gabriela Soares Ana Paula Dias Ribeiro Nancy Tomoko Sacono Alessandro Dourado Loguércio Josimeri Hebling Carlos Alberto de Souza Costa

The aim of this study was to compare the effect of a 16% carbamide peroxide (CP) gel and a 10% CP gel on mineralized enamel content and morphology. Enamel blocks from bovine incisors were subjected to a 14-day treatment (8 h/day) with 10% or 16% CP gels. Knoop microhardness was evaluated before bleaching and at 1, 7 or 14 days after this treatment (50 g/15 s). Mineral content (energy-dispersive...

Journal: :dental research journal 0
haleh heshmat maryam hoorizad ganjkar yasaman miri mohamad javad kharrazi fard

background: in order to compensate the adverse consequences of bleaching agents, the use of fl uoride-containing remineralizing agents has been suggested by many researchers. the aim of this study was to compare the effect of applying two remineralizing materials on bleached enamel hardness and in comparison to natural saliva. materials and methods: in this experimental study, 30 enamel samples...

Journal: :The journal of contemporary dental practice 2009
Horieh Moosavi Marjaneh Ghavamnasiri Vahideh Manari

AIM To evaluate the effect of dental bleaching with carbamide peroxide at different exposure times on the microleakage of resin composite and resin-modified glass ionomer restorations after placement in extracted human teeth. METHODS AND MATERIALS 120 Class V cavity preparations were placed at the cementoenamel junction (CEJ) of human teeth. Half of the cavities were restored with Filtek P60 ...

Journal: :Journal of dentistry 2003
M Sulieman M Addy J S Rees

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...

2010
Salah Hasab Mahmoud Abeer El Sayed Elembaby Ahmed Ragheb Zaher Mohammed El-Awady Grawish Heba M Elsabaa Salwa Abd El-Raof El-Negoly Mohamed Abdel Kader Sobh

OBJECTIVES To investigate the effect of 16% carbamide peroxide bleaching gel on surface micromorphology and roughness of enamel and root dentin of uremic patients receiving hemodialysis using atomic force microscopy (AFM). METHODS A total of 20 sound molars were collected from healthy individuals (n=10) and uremic patients (n=10). The roots were separated from their crowns at the cemento-enam...

2017
Tatiana Vargas-Koudriavtsev Óscar-Andrey Herrera-Sancho

BACKGROUND There are not many studies evaluating the effects of surface treatments at the molecular level. The aim of this in vitro study was to analyze the concentration of carbonate molecules in dental enamel by Raman spectroscopy after the application of in-office and home whitening agents. MATERIAL AND METHODS Sixty human teeth were randomly divided into six groups and exposed to three di...

2013
Gul Yildiz Esra Uzer Celik

OBJECTIVE Severely fluorosed and heavily discolored teeth that have large enamel defects give rise to esthetic concerns and require permanent treatment. In such cases, restorative techniques such as porcelain or composite laminate veneers or crowns are generally preferred, in which tooth preparation is inevitably required. MATERIALS AND METHODS This clinical report describes a patient with se...

2014
Leonardo Fernandes da Cunha Isabela Maria Caetano Fernando Dalitz Carla Castiglia Gonzaga José Mondelli

Cleidocranial dysplasia (CCD), is an autosomal dominant disorder with a prevalence of 1 in 1,000,000 individuals. It is generally characterized by orofacial manifestations, including enamel hypoplasia, retained primary teeth, and impacted permanent and supernumerary teeth. The successful treatment involving a timing intervention (orthodontic-maxillofacial surgeons-restorative) is already descri...

Journal: :Journal of the College of Physicians and Surgeons--Pakistan : JCPSP 2016
Nazish Fatima

OBJECTIVE To evaluate the effect of home-use bleaching agent containing 16% Carbamide Peroxide (CP) and in-office bleaching agent with 38% Hydrogen Peroxide (HP) on surface micro-morphology of enamel. STUDY DESIGN An experimental study. PLACE AND DURATION OF STUDY The discs were prepared at Material Engineering Department of NED University of Engineering and Technology, Karachi, and surface...

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