نتایج جستجو برای: tooth bleaching agents

تعداد نتایج: 451679  

2011
Flávio Fernando Demarco Sônia Saeger Meireles Hugo Ramalho Sarmento Raquel Venâncio Fernandes Dantas Tatiana Botero Sandra Beatriz Chaves Tarquinio

This review investigates erosion and abrasion in dental structures undergoing at- home bleaching. Dental erosion is a multifactorial condition that may be idiopathic or caused by a known acid source. Some bleaching agents have a pH lower than the critical level, which can cause changes in the enamel mineral content. Investigations have shown that at-home tooth bleaching with low concentrations ...

2009
Carina Sinclér Delfino Michelle Alexandra Chinelatti Laíse Daniela Carrasco-Guerisoli Andrigo Reis Batista Izabel Cristina Fröner Regina Guenka Palma-Dibb

OBJECTIVES This study evaluated the effectiveness of different home bleaching agents on color alteration and their influence on surface and subsurface microhardness of discolored bovine enamel. MATERIAL AND METHODS Forty-five fragments of bovine incisors were randomly allocated into 3 groups (n=15) according to the bleaching agent: 10% carbamide peroxide gel (CP10), 16% carbamide peroxide gel...

Journal: :Journal of endodontics 2011
Masaki Tsujimoto Atsushi Ookubo Yoko Wada Tsunenori Matsunaga Yasuhisa Tsujimoto Yoshihiko Hayashi

INTRODUCTION The aim of this study was to investigate the changes in the surface structure and chemical composition after applying bleaching agents to completely hardened mineral trioxide aggregate. METHODS A total of 12 samples of MTA blocks were divided into three groups, two different bleaching agents, and a control group. The surface structure was observed using a scanning electron micros...

2013
Hoon-Sang Chang Kyung-Mo Cho Jin-Woo Kim

Vital teeth tend to present color changes that compromise esthetics substantially. These discolorations can be extrinsic or intrinsic according to the location and the cause of the stain. Many dentists have indicated the treatment of intrinsic discolorations with bleaching agents. Thanks to innovations in bleaching agents, tooth whitening has become more and more popular among dental profession...

Journal: :Brazilian dental journal 2013
Flávio Fernando Demarco Marcus Cristian Muniz Conde Caroline Ely Eliana Nascimento Torre José Ricardo Souza Costa María Raquel Fernández Sandra Beatriz Chaves Tarquinio

This study evaluated the preferences of general dentists regarding vital and nonvital tooth bleaching therapies and investigated whether the time of clinical practice and post-graduate training influence these options. A cross-sectional study was conducted using a questionnaire with closed questions applied to dentists (n=276) of a mid-sized city of the southern Brazil (Pelotas, RS). Informatio...

Journal: :The journal of contemporary dental practice 2017
Divya Iska Raghu Devanna Madhvi Singh Rajkiran Chitumalla Sai C Bala Balasubramanian Manish Goutam

INTRODUCTION Esthetics is one of the common issues because of which patients consult dental orthodontic treatment. Two ways of tooth bleaching are available these days, which includes in-office bleach and home bleach. Various bleaching protocols are available these days for treating the tooth surfaces. Hence, we planned the present study for investigating the impact of various intracoronal blea...

2013
F Shafiei S Doustfatemeh

STATEMENT OF PROBLEM The use of tooth bleaching agents has been very popular treatment in dentistry. The bleaching agents have an inherent potential to impair surface properties of existing composite resin restorations. PURPOSE This study evaluated the effect of a combined bleaching regimen on the surface microhardness of a Silorane-based and a sealed methacrylate-based composite. MATERIALS...

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