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Article
Mercury release from a two surface amalgam restoration

Authors: Jabbar H KAMEL --- Faraed D SALMAN
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 1 Pages: 61-64
Publisher: Mosul University جامعة الموصل

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Abstract

Mercury release from a two surface amalgam restoration has been determined in blood and urine at different time interval after performing amalgam restoration. The results showed that the average mercury released in blood reached relatively the level that was before restoration to be done after 3 weeks


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
Relation Between Serum Copper and Iron with Mercury Pollution in Dentists Used Amalgam Fillings
العلاقة بين العناصر الاساسية الحديد والنحاس والتلوث بالزئبق من خلال تعرض أطباء الاسنان للحشوات الزئبقية

Authors: Salah Alnuaimi صلاح الدين النعيمي --- Kawther Alzubaide كوثر عبدالرزاق الزبيدي --- Soud Turky Alazzawi سعاد تركي علي
Journal: Al-Ma'mon College Journal مجلة كلية المامون ISSN: 19924453 Year: 2018 Issue: 32 Pages: 341-355
Publisher: AlMamon University College كلية المامون الجامعة

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Abstract

The aim of this study is the investigation of copper and iron levels in blood serum of dentists exposed to mercury which was undertaken. from mercury dental amalgam preparation .The study includes (70) dentists divide into three groups according to the period of exposure (Group B exposed for (3-10) years), (Group C exposed for (10-15) years), (and Group D exposed for (15-30) years). Twenty healthy controls with no chance of exposure to mercury were chosen as control group (A). Mercury, copper and iron concentration were measured.The result revealed that copper level increased with duration of exposure compared to the control group. A decrease in iron level was noticed in all dentists group compared with the control. It’s concluded that mercury vapour from the dental amalgam could be a serious pollution poisoning source of dentists inhaling mercury vapor which inhibits some metabolic enzymes through their sulfhydryl (-SH) group. The alteration of essential and trace elements in the body could be due to damage the occur to the biological membranes and the imbalance of the ion transports across these membranes.

إن الهدف من هذه الدراسة هو قياس مستوى النحاس والحديد في مصل دم اطباء الاسنان الذين يستخدمون الزئبق في حشوة الاسنان الدائمية وذلك من خلال مزجه مع مسحوق السبيكة لتكوين مادة بلاستيكية تحشى في الحفرة المحضرة. كان عدد المتطوعين من اطباء الاسنان سبعين طبيباً وقد قسموا الى ثلاث مجاميع:(مجموعة (B) فترة التعرض (3 – 10) سنة)، (مجموعة (C) فترة التعرض ( 10- 15) سنة)، (مجموعة (D) فترة التعرض ( 15- 30) سنة). كما اخذت عينات من دم متطوعين اصحاء من غير العاملين في هذا المجال واعتبروا كمجموعة سيطرة (المجموعة A ) وعددهم (20) متطوعاً. اظهرت النتائج زيادة في تركيز النحاس وقلة في تركيز الحديد لدى العاملين بزيادة فترة التعرض مقارنة مع مجموعة السيطرة، مما يعطي دلالة على ان التعرض للزئبق من خلال تحضير الحشوة قد يؤدي الى التسمم بالزئبق نتيجة استنشاق الابخرة وقد يعزى ذلك الى ان ايون الزئبق يعمل على تثبيط بعض الانزيمات الايضية والحاوية على مجموعة الثايول (-SH) في الجسم كما ويعمل على عدم حصول موازنة في العناصر الاساسية والضئيلة نتيجة تضرر اغشية الخلايا الحية وعدم السيطرة على عمليات النقل خلال المضخات المختصة بعمليات نقل الايونات.


Article
The effect of amalgam alloy types, surface treatments, and bonding agents on the shear bond strength between amalgam and resin composite

Authors: Raghad A. Rasheed --- Abdul–Haq A. Suliman
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2006 Volume: 6 Issue: 3 Pages: S38-S47
Publisher: Mosul University جامعة الموصل

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Abstract

To evaluate the effect of amalgam alloy types, surface treatments, bonding agents, on the shear bond strength between set amalgam and resin composite restorative materials. Materials and Methods: Three hundred and thirty eight holes (6 mm in diameter and 2 mm depth) prepared in a 2x2.5 cm cold cure acrylic resin blocks in which amalgam was condensed. The 338 samples were divided into two groups, the control group which consisted of 26 intact amalgam samples, and the repair group consisted of 312 repair amalgam samples. Each group (intact, and repair) was subdivided into two groups according to the type of amalgam alloy. Half of the samples were filled with spherical amalgam alloy and the other were filled with admixed amalgam alloy. The repair samples then divided in to four groups according to the surface treatment, in turn each sub-group divided into three groups according to the bonding agent. The samples were thermocycled, before shear bond strength was tested. The mode of failure was observed for each specimen. Results and Conclusion: The statistical analysis showed that the repair strength was 50% of the intact strength, and the admixed amalgam samples showed higher shear bond strength than spherical amalgam samples. The group roughened with diamond bur showed higher repair bond strength than the groups received other surface treatment. The use of dentin bonding agent (All–Bond 2 and Alloybond) would increase the repair bond strength between the amalgam and the composite restorative materials. And the mode of failure was mostly an adhesive type.

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