نتایج جستجو برای: bleaching powder

تعداد نتایج: 53308  

Journal: :Brazilian dental journal 2014
Mário Artur Pereira Santana Flávia Pardo Salata Nahsan Alaíde Hermínia de Aguiar Oliveira Alessandro Dourado Loguércio André Luis Faria-e-Silva

Regardless of the high success rate, patients commonly report the occurrence of tooth sensitivity during the in-office bleaching procedures. Recently, it has been demonstrated that using a customized tray (called sealed in-office bleaching technique) reduces peroxide penetration. The aim of this randomized clinical study was to evaluate tooth sensitivity and bleaching efficacy of sealed bleachi...

2016
M. A. Nicholson

J This note on the purification of the watersupply of the Lawrence Military Asylum, Sanawar, may prove useful to medical officers, by reminding them of the ease with which even very large quantities of water can be rendered fit for drinking purposes at a very low cost, and with the most primitive of apparatus, by means of bleaching powder. The water-supply of the Asylum is derived from a spring...

2003
Van B Haywood

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...

Journal: :Quintessence international 1992
V B Haywood

This article reviews the literature on the use of hydrogen peroxide in three professionally administered bleaching techniques from historical, technique, and safety viewpoints. Safety over time, absolute safety, and relative safety of nonvital bleaching, in-office vital bleaching, nightguard vital bleaching, and over-the-counter bleaching kits are compared. The advantages and disadvantages of d...

2015
Keisha D. Bahr Paul L. Jokiel Kuʻulei S. Rodgers Fabiano Thompson

Until recently, subtropical Hawai'i escaped the major bleaching events that have devastated many tropical regions, but the continued increases in global long-term mean temperatures and the apparent ending of the Pacific Decadal Oscillation (PDO) cool phase have increased the risk of bleaching events. Climate models and observations predict that bleaching in Hawai'i will occur with increasing fr...

2017
Soodabeh Kimyai Mahmoud Bahari Fereshteh Naser-Alavi Soodabeh Behboodi

BACKGROUND Tooth bleaching is a safe and conservative treatment modality to improve the esthetic appearance of discolored teeth. One of the problems with the use of bleaching agents is their possible effect on surface microhardness of resin-based materials. The present study was carried out to evaluate the effect of in-office and at-home bleaching on surface microhardness of giomer. MATERIAL ...

2011
Steven J. Dalton Andrew G. Carroll

Limited information is available on the bleaching susceptibility of coral species that dominate high latitude reefs along the eastern seaboard of Australia. The main aims of this study were to: (i) monitor coral health and spatial patterns of coral bleaching response at the Solitary Islands Marine Park (SIMP) and Lord Howe Island Marine Park (LHIMP), to determine variability of bleaching suscep...

2014
Jahson Berhane Alemu I Ysharda Clement

Ocean temperatures are increasing globally and the Caribbean is no exception. An extreme ocean warming event in 2010 placed Tobago's coral reefs under severe stress resulting in widespread coral bleaching and threatening the livelihoods that rely on them. The bleaching response of four reef building taxa was monitored over a six month period across three major reefs systems in Tobago. By identi...

2012
Qiang Zhao Dezhi Sun Zhaohong Wang Junwen Pu Xiaojuan Jin Mian Xing

Tetra acetyl ethylene diamine (TAED) was used as an activator in H2O2 bleaching to improve bleaching efficiency. The present work was aimed at confirming different activations for various H2O2/TAED bleaching processes, including the addition of acetic anhydride and the stepaddition of sodium hydroxide. The results showed that an acetic anhydride dosage of 1%, an acetic anhydride treatment time ...

2013
Jean-Paul A. Hobbs Ashley J. Frisch Benjamin M. Ford Michele Thums Pablo Saenz-Agudelo Kathryn A. Furby Michael L. Berumen

BACKGROUND Rising sea temperatures are causing significant destruction to coral reef ecosystems due to coral mortality from thermally-induced bleaching (loss of symbiotic algae and/or their photosynthetic pigments). Although bleaching has been intensively studied in corals, little is known about the causes and consequences of bleaching in other tropical symbiotic organisms. METHODOLOGY/PRINCI...

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