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Dental mercury

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https://www.readbyqxmd.com/read/28501064/four-or-more-amalgam-fillings-correlate-with-higher-blood-mercury-levels-in-pregnant-women-but-not-high-enough-to-be-of-health-concern
#1
Stefanie L Russell
ARTICLE TITLE AND BIBLIOGRAPHIC INFORMATION: Dental associations with blood mercury in pregnant women. Golding J, Steer CD, Gregory S, Lowery T, Hibbeln JR, Taylor CM. Community Dent Oral Epidemiol 2016; 44: 216-22. SOURCE OF FUNDING: This study was funded by a combination of government (UK Medical Research Council), foundation/nonprofit (the Welcome Trust) and university (University of Bristol, UK) grants. TYPE OF STUDY/DESIGN: Cross-sectional...
June 2017: Journal of Evidence-based Dental Practice
https://www.readbyqxmd.com/read/28437002/dentists-restorative-decision-making-and-implications-for-an-amalgamless-profession-part-4-clinical-factors
#2
G Alexander, Hopcraft, M J Tyas, R H K Wong
BACKGROUND: The Minamata Convention embodies a world-wide reduction in the production and use of mercury and mercury-containing products and processes, including a phase-down of dental amalgam. This will change the approach to the use of direct restorative materials in the near future. There is little research as to the influence of clinical factors on dentists' decision-making which may be of use when determining the impact of any change. METHODS: An online survey relating to aspects of and attitudes to the use of direct restorative materials was distributed to all dentists who were members of the Australian Dental Association and/or Members or Fellows of the Royal Australasian College of Dental Surgeons...
April 24, 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28379072/biomarkers-of-mercury-toxicity-past-present-and-future-trends
#3
Vasco Branco, Sam Caito, Marcelo Farina, João Teixeira da Rocha, Michael Aschner, Cristina Carvalho
Mercury (Hg) toxicity continues to represent a global health concern. Given that human populations are mostly exposed to low chronic levels of mercurial compounds (methylmercury through fish, mercury vapor from dental amalgams, and ethylmercury from vaccines), the need for more sensitive and refined tools to assess the effects and/or susceptibility to adverse metal-mediated health risks remains. Traditional biomarkers, such as hair or blood Hg levels, are practical and provide a reliable measure of exposure, but given intra-population variability, it is difficult to establish accurate cause-effect relationships...
April 5, 2017: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/28344835/a-review-of-mercury-exposure-and-health-of-dental-personnel
#4
REVIEW
Natasha Nagpal, Silvana S Bettiol, Amy Isham, Ha Hoang, Leonard A Crocombe
Considerable effort has been made to address the issue of occupational health and environmental exposure to mercury. This review reports on the current literature of mercury exposure and health impacts on dental personnel. Citations were searched using four comprehensive electronic databases for articles published between 2002 and 2015. All original articles that evaluated an association between the use of dental amalgam and occupational mercury exposure in dental personnel were included. Fifteen publications from nine different countries met the selection criteria...
March 2017: Safety and Health At Work
https://www.readbyqxmd.com/read/28281590/bulk-fill-resin-based-composite-restorative-materials-a-review
#5
J Chesterman, A Jowett, A Gallacher, P Nixon
Resin-based composite (RBC) materials are increasingly being used for the restoration of posterior teeth. The increasing demand for aesthetic, tooth-coloured restorations coupled with the patient's concerns regarding the use of mercury containing restorations, has driven a surge in the use of RBC materials. With the Minamata Convention in 2013 calling for the phase-out of dental amalgam and dental schools increasingly teaching techniques for RBC restorations in posterior teeth, it is likely that the dental profession's reliance upon RBC for the restoration of posterior teeth will only increase...
March 10, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28236437/biocompatibility-of-biomaterials-lessons-learned-and-considerations-for-the-design-of-novel-materials
#6
REVIEW
Gottfried Schmalz, Kerstin M Galler
OBJECTIVES: Biocompatibility of dental materials has gained increasing interest during recent decades. Meanwhile, legal regulations and standard test procedures are available to evaluate biocompatibility. Herein, these developments will be exemplarily outlined and some considerations for the development of novel materials will be provided. METHODS: Different aspects including test selection, release of substances, barriers, tissue healing, antibacterial substances, nanoparticles and environmental aspects will be covered...
April 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28220332/increased-mercury-emissions-from-modern-dental-amalgams
#7
Ulf G Bengtsson, Lars D Hylander
All types of dental amalgams contain mercury, which partly is emitted as mercury vapor. All types of dental amalgams corrode after being placed in the oral cavity. Modern high copper amalgams exhibit two new traits of increased instability. Firstly, when subjected to wear/polishing, droplets rich in mercury are formed on the surface, showing that mercury is not being strongly bonded to the base or alloy metals. Secondly, high copper amalgams emit substantially larger amounts of mercury vapor than the low copper amalgams used before the 1970s...
April 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28209268/inorganic-mercury-prevents-the-differentiation-of-sh-sy5y-cells-amyloid-precursor-protein-microtubule-associated-proteins-and-ros-as-potential-targets
#8
Miguel Chin Chan, Elizabeth Bautista, Isabel Alvarado-Cruz, Betzabet Quintanilla-Vega, José Segovia
Exposure to mercury (Hg) occurs through different pathways and forms including methylmecury (MeHg) from seafood and rice, ethylmercury (EtHg), and elemental Hg (Hg(0)) from dental amalgams and artisanal gold mining. Once in the brain all these forms are transformed to inorganic Hg (I-Hg), where it bioaccumulates and remains for long periods. Hg is a well-known neurotoxicant, with its most damaging effects reported during brain development, when cellular key events, such as cell differentiation take place. A considerable number of studies report an impairment of neuronal differentiation due to MeHg exposure, however the effects of I-Hg, an important form of Hg found in brain, have received less attention...
February 6, 2017: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/28103053/mercury-amalgam-diffusion-in-human-teeth-probed-using-femtosecond-libs
#9
Liciane Toledo Bello, Patricia Aparecida da Ana, Dário Santos, Francisco José Krug, Denise Maria Zezell, Nilson Dias Vieira, Ricardo Elgul Samad
In this work the diffusion of mercury and other elements from amalgam tooth restorations through the surrounding dental tissue (dentin) was evaluated using femtosecond laser-induced breakdown spectroscopy (fs-LIBS). To achieve this, seven deciduous and eight permanent extracted human molar teeth with occlusal amalgam restorations were half-sectioned and analyzed using pulses from a femtosecond laser. The measurements were performed from the amalgam restoration along the amalgam/dentin interface to the apical direction...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28093013/long-term-changes-in-health-complaints-after-removal-of-amalgam-restorations
#10
Lars Björkman, Therese T Sjursen, Knut Dalen, Gunvor B Lygre, Trine Lise L Berge, Johanna Svahn, Birgitte F Lundekvam
OBJECTIVE: Concerns over adverse effects of mercury released from dental amalgam sometimes lead patients to request removal of their amalgam restorations. Several studies report improvement of subjective health after removal of amalgam restorations, but the mechanisms are unclear. The aim of this paper is to present data on long term changes in intensity of health complaints after amalgam removal in a group of patients with health complaints self-attributed to dental amalgam. Data from the five years follow-up in a clinical trial are presented and related to potential determinants of change...
January 16, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28055311/immunotoxicity-of-mercury-pathological-and-toxicological-effects
#11
REVIEW
Faheem Maqbool, Kamal Niaz, Fatima Ismail Hassan, Fazlullah Khan, Mohammad Abdollahi
Mercury (Hg) is toxic and hazardous metal that causes natural disasters in the earth's crust. Exposure to Hg occurs via various routes; like oral (fish), inhalation, dental amalgams, and skin from cosmetics. In this review, we have discussed the sources of Hg and its potential for causing toxicity in humans. In addition, we also review its bio-chemical cycling in the environment; its systemic, immunotoxic, genotoxic/carcinogenic, and teratogenic health effects; and the dietary influences; as well as the important considerations in risk assessment and management of Hg poisoning have been discussed in detail...
January 2, 2017: Journal of Environmental Science and Health. Part C, Environmental Carcinogenesis & Ecotoxicology Reviews
https://www.readbyqxmd.com/read/28054040/systematic-review-on-highly-viscous-glass-ionomer-cement-resin-coating-restorations-part-ii-%C3%A2-do-they-merge-minamata-convention-and-minimum-intervention-dentistry
#12
Andrej M Kielbassa, Georg Glockner, Michael Wolgin, Karl Glockner
BACKGROUND: With the Minamata Convention the use of mercury will be phased down, and this undoubtedly will have an effect on dental treatment regimens and economic resources. Composite resin restorations are considered viable alternatives to amalgam fillings; however, these will not be covered completely by health insurance systems in many countries. Recently, a high-viscosity glass-ionomer cement (hvGIC) processed with a resinous coating (RC) has been introduced, and has been marketed as a restorative material in load-bearing Class I cavities (and in Class II cavities with limited size), thus serving as a possible alternative to amalgam fillings...
2017: Quintessence International
https://www.readbyqxmd.com/read/27855718/attitudes-of-dentists-and-interns-in-riyadh-to-the-use-of-dental-amalgam
#13
Fahad Alkhudhairy
BACKGROUND: Studies investigating the attitudes of Saudi dentists to the use of amalgam for restorations are relatively rare. Considering the goals set forth by the Minamata Convention on Mercury, it appears prudent to investigate the attitudes of experienced dentists and fresh dental graduates to the use of amalgam. The aim of this study was to assess the attitudes of Saudi dentists and interns working in Riyadh, Saudi Arabia to the use of amalgam. Using a convenience sampling methodology, a total of 400 Saudi dentists and interns were contacted to request their participation in this cross-sectional questionnaire-based study...
November 17, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27757445/systematic-review-on-highly-viscous-glass-ionomer-cement-resin-coating-restorations-part-i-%C3%A2-do-they-merge-minamata-convention-and-minimum-intervention-dentistry
#14
Andrej M Kielbassa, Georg Glockner, Michael Wolgin, Karl Glockner
BACKGROUND: With the Minamata Convention the use of mercury will be phased down, and this undoubtedly will have an effect on dental treatment regimens and economic resources. Composite resin restorations are considered viable alternatives to amalgam fillings; however, these will not be covered completely by health insurance systems in many countries. Recently, a high-viscosity glass-ionomer cement (hvGIC) processed with a resinous coating (RC) has been introduced, and has been marketed as a restorative material in load-bearing Class I cavities (and in Class II cavities with limited size), thus serving as a possible alternative to amalgam fillings...
2016: Quintessence International
https://www.readbyqxmd.com/read/27738246/is-mercury-in-tibetan-medicine-toxic-clinical-neurocognitive-and-biochemical-results-of-an-initial-cross-sectional-study
#15
Sarah Sallon, Yahav Dory, Yazeed Barghouthy, Tsewang Tamdin, Rigzin Sangmo, Jamyang Tashi, Sonam Yangdon, Tenzin Yeshi, Tsetan Sadutshang, Michal Rotenberg, Elinor Cohen, Yehudit Harlavan, Galit Sharabi, Tali Bdolah-Abram
Mercury an important therapeutic substance in Tibetan Medicine undergoes complex "detoxification" prior to inclusion in multi-ingredient formulas. In an initial cross-sectional study, patients taking Tibetan Medicine for various conditions were evaluated for mercury toxicity. Two groups were identified: Group 1, patients taking " Tsothel" the most important detoxified mercury preparation and Group 2, patients taking other mercury preparations or mercury free Tibetan Medicine. Atomic fluorescence spectrometry of Tibetan Medicine showed mercury consumption 130 µg/kg/day (Group 1) and 30 µg/kg/day (Group 2) ( P ≤ 0...
February 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27676331/chemical-forms-of-mercury-in-human-hair-reveal-sources-of-exposure
#16
Alain Manceau, Mironel Enescu, Alexandre Simionovici, Martine Lanson, Maria Gonzalez-Rey, Mauro Rovezzi, Rémi Tucoulou, Pieter Glatzel, Kathryn L Nagy, Jean-Paul Bourdineaud
Humans are contaminated by mercury in different forms from different sources. In practice, contamination by methylmercury from fish consumption is assessed by measuring hair mercury concentration, whereas exposure to elemental and inorganic mercury from other sources is tested by analysis of blood or urine. Here, we show that diverse sources of hair mercury at concentrations as low as 0.5 ppm can be individually identified by specific coordination to C, N, and S ligands with high energy-resolution X-ray absorption spectroscopy...
October 4, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27671962/policy-development-fosters-collaborative-practice-the-example-of-the-minamata-convention-on-mercury
#17
REVIEW
Daniel M Meyer, Linda M Kaste, Kathy M Lituri, Scott Tomar, Christopher H Fox, Poul Erik Petersen
This article provides an example of interprofessional collaboration for policy development regarding environmental global health vis-à-vis the Minamata Convention on Mercury. It presents an overview of mercury and mercury-related environmental health issues; public policy processes and stakeholders; and specifics including organized dentistry's efforts to create global policy to restrict environmental contamination by mercury. Dentistry must participate in interprofessional collaborations and build on such experiences to be optimally placed for ongoing interprofessional policy development...
October 2016: Dental Clinics of North America
https://www.readbyqxmd.com/read/27666813/mercury-as-an-environmental-stimulus-in-the-development-of-autoimmunity-a-systematic-review
#18
REVIEW
William Crowe, Philip J Allsopp, Gene E Watson, Pamela J Magee, J J Strain, David J Armstrong, Elizabeth Ball, Emeir M McSorley
Autoimmune diseases result from an interplay of genetic predisposition and factors which stimulate the onset of disease. Mercury (Hg), a well-established toxicant, is an environmental factor reported to be linked with autoimmunity. Hg exists in several chemical forms and is encountered by humans in dental amalgams, certain vaccines, occupational exposure, atmospheric pollution and seafood. Several studies have investigated the effect of the various forms of Hg, including elemental (Hg(0)), inorganic (iHg) and organic mercury (oHg) and their association with autoimmunity...
January 2017: Autoimmunity Reviews
https://www.readbyqxmd.com/read/27639196/associations-of-blood-mercury-inorganic-mercury-methyl-mercury-and-bisphenol-a-with-dental-surface-restorations-in-the-u-s-population-nhanes-2003-2004-and-2010-2012
#19
Lei Yin, Kevin Yu, Simon Lin, Xiao Song, Xiaozhong Yu
The potential adverse health effects of mercury from amalgam and bisphenol A (BPA) from composite resin have been significant concerns. It is unclear whether dental restorative materials significantly contribute to mercury or BPA levels. The purpose of this study is to use NHANES data including 14,703 subjects (2003-2004: n=7514; 2011-2012: n=7189) to examine the association between Dental Surface Restorations (DSR) and blood total mercury (THg), inorganic mercury (IHg), methyl mercury (MeHg) and urinary BPA through the stratification of covariates and multivariate analysis...
December 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27488273/exposure-to-mercury-in-susceptible-population-groups-living-in-the-former-mercury-mining-town-of-idrija-slovenia
#20
Alfred B Kobal, Janja Snoj Tratnik, Darja Mazej, Vesna Fajon, Darija Gibičar, Ana Miklavčič, David Kocman, Jože Kotnik, Alenka Sešek Briški, Joško Osredkar, Mladen Krsnik, Marija Prezelj, Črtomir Knap, Bojana Križaj, Lian Liang, Milena Horvat
500 years of mercury (Hg) mining in the town of Idrija has caused severe pollution in Idrija and its surroundings. Following the closure of the mine in 1995, the environment remains contaminated with Hg. Sources of elemental-, inorganic- and methyl Hg exposure were identified, potential environmental level of exposure to Hg was evaluated and actual internal exposure to Hg was assessed in selected susceptible population groups comprising school-age children and pregnant women living in Idrija and in control groups from rural and urban environments...
January 2017: Environmental Research
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