نتایج جستجو برای: bleaching clay

تعداد نتایج: 28440  

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: :Marine pollution bulletin 2003
A E Douglas

Bleaching refers to the loss of colour in symbioses between dinoflagellate algae of the genus Symbiodinium and marine benthic animals, e.g. corals. Bleaching generally results in depressed growth and increased mortality, and it can be considered as a deleterious physiological response or ailment. An explanatory framework for the causes of bleaching comprises three elements: the external factors...

2013
Adam D. Hughes Andréa G. Grottoli

Thermally induced bleaching has caused a global decline in corals and the frequency of such bleaching events will increase. Thermal bleaching severely disrupts the trophic behaviour of the coral holobiont, reducing the photosynthetically derived energy available to the coral host. In the short term this reduction in energy transfer from endosymbiotic algae results in an energy deficit for the c...

2013
Glaucia Cristina Rodrigues Nascimento Cyndi Albuquerque de Miranda Sissy Maria Mendes Machado Gustavo Antonio Martins Brandão Haroldo Amorim de Almeida Cecy Martins Silva

OBJECTIVE To test the null hypothesis that no difference exists between the effects of at-home bleaching and in-office bleaching on shear bond strength (SBS) with bracket bonding at 4 different time intervals after dental bleaching. METHODS Ninety extracted human premolars were randomly divided into 9 groups (n = 10) according to the bleaching methods used (at-home bleaching and in-office ble...

Journal: :trauma monthly 0
jun-ichiro kinoshita department of esthetic dentistry, school of dentistry, showa university, tokyo, japan hamid jafarzadeh dental research center, department of endodontics, faculty of dentistry, mashhad university of medical sciences, mashhad, ir iran; dental research center, department of endodontics, faculty of dentistry, mashhad university of medical sciences, p.o.box: 91735-984, mashhad, ir iran. tel: +98-5118829501, fax: +98-5118829500 atsufumi manabe department of esthetic dentistry, school of dentistry, showa university, tokyo, japan miki nozawa department of clinical cariology and endodontology, school of dentistry, showa university, tokyo, japan tokiko uchida department of clinical cariology and endodontology, school of dentistry, showa university, tokyo, japan paul vincent abbott school of dentistry, university of western australia, perth, australia

background bleaching of traumatized discolored teeth is considered an important issue in esthetic dentistry. various methods have been introduced for bleaching, some of which may have adverse effects on soft or hard tissues of the tooth. objectives the objective of the study was to evaluate the effects of ktp laser bleaching on enamel of traumatized teeth. materials and methods a square of 36 m...

ژورنال: مجله دندانپزشکی 1993
شیخ الاسلامی, مهشید , صادقین, احمد ,

Normal 0 false false false EN-US X-NONE AR-SA One of the concerns od patients have been teeth stains particularly in anterior region. The etiology of this can be pulp necrosis, developmental disorders, drugs and systemic diseases. Bleaching or tooth whitening is a solution for some of these color changes. This article evaluated different methods of...

Journal: :The Saudi dental journal 2014
Mohammed Q Alqahtani

AIM This review article will help clinicians improve their understanding of the history of bleaching procedures, bleaching types, components, mechanisms, and their effects on soft tissue, tooth structures, resin composite, and bonding. METHODS The controversial issues about bleaching procedures and their effects are reviewed. Additionally, the consequences of pre- and post-bleaching on the bo...

2010
Randa Hafez Doa Ahmed Mai Yousry Wafa El-Badrawy Omar El-Mowafy

OBJECTIVES The purpose of this study was to determine color changes and surface roughness of composites when they were subjected to in-office bleaching. METHODS 12 discs 15 mm in diameter and 2 mm thick were prepared from two shades (A2 & A4) of two composites, Durafil VS (DF) and TPH3 (TPH). Specimens were polished and stored in distilled water for 24 hours at 37 degrees C before being subje...

2014
Nadia Lunardi Americo-Bortolazzo Correr Alessandra-Nara-Souza Rastelli Débora-Alves-Nunes-Leite Lima Rafael-Leonardo-Xediek Consani

UNLABELLED Aware of the diffusion capacity of bleaching in the dental tissues, many orthodontists are subjecting their patients to dental bleaching during orthodontic treatment for esthetic purposes or to anticipate the exchange of esthetic restorations after the orthodontic treatment. For this purpose specific products have been developed in pre-loaded whitening trays designed to fit over and ...

Journal: :The journal of contemporary dental practice 2017
Marina Og Galloza Keren Cf Jordão-Basso Matheus C Bandeca Samuel O Costa Alvaro H Borges Mateus R Tonetto Fabio C Tirintan Kátia C Keine Milton C Kuga

INTRODUCTION The aim of this study was to evaluate the effects of bleaching gel using 35% hydrogen peroxide (HP), associated with red carmine pigment (RC), in the 3:1 or 1:1 ratio, on fracture resistance and dentin microhardness of endodontically treated teeth. MATERIALS AND METHODS A total of 40 lower incisors were endodontically treated and divided into four groups (n = 10), according to th...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید