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Article
Effect of in-dental clinic bleaching agents on the releases of mercury from the specimen of amalgam restoration in relation to their times intervals

Authors: Afnan AL-Shimmer افنان الشمر --- Mohammad Al-Casey محمد القيسي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 1 Pages: 82-84
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: Measuring the effect of bleaching agents on mercury release from dental amalgam is important fromboth restorative and toxicological points view. The aims of the study was to evaluate the effects of two differenttypes of bleaching agents for vital teeth by using with light source on the release of mercury from the specimen ofamalgam restoration .Materials and methods: Fifty three specimen of amalgam restoration, were subject to treated with bleaching agents( 35% hydrogen peroxide and carbamide peroxide ) and then application of light and laser radiation to activate thebleaching agents. Flameless atomic absorption spectrophotometer with Gold Vapor Generator was used tomeasure the release of mercury from the specimen of amalgam restoration.Results: Highly significant increase in the release of release of mercury from the specimen of amalgam restoration inrelation to the times intervals.Conclusions: In this study showed that release of release of mercury from the specimen of amalgam restoration,after treated with both 35% carbamide peroxide and 35% hydrogen peroxide increase with increase the time andcompared with control groups.


Article
Effect of in-dental clinic bleaching agents on the releases of mineral ions from the enamel surfaces in relation to their times intervals

Authors: Afnan AL-Shimmer افنان الشمر --- Mohammad Al-Casey محمد القيسي
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2012 Volume: 24 Issue: 2 Pages: 91-93
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: alterations of the enamel after topical application of bleaching agents, presenting as majorconsequences are: ions release, increased superficial roughness, stronger bacterial attachment and hardnessalteration. The aims of the study were to evaluate the effects of two different types of bleaching agents for vital teethby using with light source on the release of ions (Calcium and phosphate ions) from the enamel surface.Materials and methods: Fifty three sound enamel surface for calcium ions release and Fifty three sound enamel surfaces forphosphate ions, were subject to treated with bleaching agents (35% hydrogen peroxide and carbamide peroxide) andthen application of light and laser radiation to activate the bleaching agents. Spectrophotometer and Buck scientificatomic absorption spectrophotometer were used to measure the ions release from enamel surface.Results: highly significant increase in the release of ions (calcium ions), while significant increase in the release of ions(phosphate ions) in relation to the times intervals.Conclusions: In this study showed that release of calcium ions from enamel surface after treated with both 35%carbamide peroxide and 35% hydrogen peroxide increase with increase the time and compared with release ofphosphate ions release and control groups.

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