نتایج جستجو برای: silver mercury amalgam

تعداد نتایج: 87541  

2013
Robin Warwick Andrea O’Connor Brianne Lamey

BACKGROUND Amalgam that is used for dental fillings contains approximately 50% elemental mercury. During dental student training, amalgam is often removed by drilling without the use of water spray and suction, which are protective measures in preventing mercury aerosol. In this study we measured mercury vapor levels in ambient air during amalgam removal as is typically performed in dental trai...

Journal: :Journal of dental research 1969
L N Johnson K Asgar F A Peyton

An etch resistance phase was found in dental silver amalgam when the amalgam was examined metallographically. This phase was common to the silver alloy ingot as well as to its prepared amalgam. Qualitative electron microprobe technics were used to identify this phase. Quantitative electron microprobe analysis defined it as the R' phase of the copper-tin system or the intermetallic compound Cu6Sn5.

2007
David C. Bellinger David Daniel Felicia Trachtenberg Mary Tavares Sonja McKinlay

BACKGROUND A concern persists that children's exposure to mercury vapor from dental amalgams produces neurotoxicity. OBJECTIVE Our goal was to compare the neuropsychological function of children, without prior exposure to dental amalgam, whose caries were repaired using either dental amalgam or mercury-free composite materials. METHODS We conducted a randomized controlled trial involving 53...

Gh Mortazavi, M Haghani N Rastegarian S Zarei SMJ Mortazavi,

According to the World Health Organization (WHO), factors such as growing electricity demand, ever-advancing technologies and changes in social behaviour have led to steadily increasing exposure to man-made electromagnetic fields.  Dental amalgam fillings are among the major sources of exposure to elemental mercury vapour in the general population. Although it was previously believed that low ...

2010

The last extensive review of the published literature relevant to amalgam safety was conducted by the Life Science Research Office (LSRO) and published in 2004. The LSRO expert panel report concluded that there was no consistent evidence of adverse health affects attributed to dental amalgam fillings. The panel noted that insufficient evidence was available on the topics of dental amalgam and: ...

Journal: :FASEB journal : official publication of the Federation of American Societies for Experimental Biology 1992
H V Aposhian D C Bruce W Alter R C Dart K M Hurlbut M M Aposhian

There is considerable controversy as to whether dental amalgams may cause systemic health effects in humans because they liberate elemental mercury. Most such amalgams contain as much as 50% metallic mercury. To determine the influence of dental amalgams on the mercury body burden of humans, we have given volunteers, with and without amalgams in their mouth, the sodium salt of 2,3-dimercaptopro...

2016
Maryam Paknahad S M J Mortazavi Shoaleh Shahidi Ghazal Mortazavi Masoud Haghani

BACKGROUND Dental amalgam is composed of approximately 50% elemental mercury. Despite concerns over the toxicity of mercury, amalgam is still the most widely used restorative material. Wi-Fi is a rapidly using local area wireless computer networking technology. To the best of our knowledge, this is the first study that evaluates the effect of exposure to Wi-Fi signals on mercury release from am...

2016

Appendix A – Literature Search Criteria for Identification of Relevant Studies Appendix B – Literature Search Strategy and Terms Appendix C – Bibliography of Articles Reviewed as Additional Scientific Information Appendix D – Other Literature Cited Appendix E Table Summary of Exposure and Effects from Articles Reviewed Appendix F ATSDR-2005 and EPA-2002 update summary documents Appendix G1 and ...

Journal: :Nihon eiseigaku zasshi. Japanese journal of hygiene 1998
T Mori T Hirai T Tomiyama K Iida S Miyakoshi K Sato Y Kusaka M Yanagihara K Ueda

We investigated mercury sensitization in relation to urinary and hair mercury concentrations. Patch tests were performed on 215 medical students and these tests demonstrated that 28 students were mercury-sensitized (13.0%). Life-styles were studied by questionnaire in 26 of the mercury sensitized students and 46 of the non-sensitized subjects. Urinary mercury concentrations were measured in 25 ...

Journal: :Occupational and environmental medicine 2005
B A Dye S E Schober C F Dillon R L Jones C Fryar M McDowell T H Sinks

BACKGROUND Mercury amalgam dental restorations have been used by dentists since the mid 19th century and issues on safety continue to be periodically debated within the scientific and public health communities. Previous studies have reported a positive association between urine mercury levels and the number of dental amalgams, but this relation has never been described in a nationally represent...

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