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Dental mercury

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
Sarah Sallon, Yahav Dory, Yazeed Barghouti, Tsewang Tamdin, Rigzin Sangmo, Jamyang Tashi, Sonam Yangdon, Tenzin Yeshi, Tsetan Sadutshang, Michal Rotenburg, 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...
October 13, 2016: Experimental Biology and Medicine
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
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
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...
September 23, 2016: Autoimmunity Reviews
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
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...
July 31, 2016: Environmental Research
Nayab Gul, Sardar Khan, Abbas Khan, Javed Nawab, Isha Shamshad, Xinwei Yu
This is the first study conducted to quantify the excretion and distribution of mercury (Hg) with time (days) in the biological samples collected from Hg dental amalgam users (MDA). The individuals, with Hg-based dental filling were selected, and their biological samples (red blood cells (RBCs), plasma, urine, hair, and nails) were collected on first, third, and 12th day of fillings. The concentrations of Hg observed in the biological samples of MDA were also correlated with the biological variables such as age, weight, restoration, fish consumption, number, and surface area of fillings...
July 27, 2016: Environmental Science and Pollution Research International
José G Dórea
Exposure through human skin from application of skin lightening creams and soaps (SLCS) based on mercury salts has often escaped attention of environmental scientists. The skin absorption of Hg from an adult on a daily basis in this type of exposure, depending on the product used, can be higher than Hg originated from dental amalgam filling, Thimerosal-containing flu vaccine, and fish-methylmercury. Hg from SLCS is retained more in brain of albino than pigmented animals. Therefore, environmental Hg scientists should be aware of this important but often neglected source of low-dose Hg exposure during pregnancy and lactation when measuring adverse health effects on child growth and development...
July 16, 2016: International Journal of Hygiene and Environmental Health
Nadia Jamil, Mujtaba Baqar, Samar Ilyas, Abdul Qadir, Muhammad Arslan, Muhammad Salman, Naveed Ahsan, Hina Zahid
The objective of this study was to assess the occupational exposure to mercury in dentistry and associated environmental emission in wastewater of Lahore, Pakistan. A total of ninety-eight blood samples were collected comprising 37 dentists, 31 dental assistants, and 30 controls. Results demonstrate that the dentistry personnel contained significantly higher mean concentration of mercury in their blood samples (dentists: 29.835 µg/L and dental assistants: 22.798 µg/L) compared to that of the controls (3...
2016: BioMed Research International
Eunhee Ha, Niladri Basu, Stephan Bose-O'Reilly, José G Dórea, Emeir McSorley, Mineshi Sakamoto, Hing Man Chan
Mercury pollution and its impacts on human health is of global concern. The authors of this paper were members of the Plenary Panel on Human Health in the 12th International Conference on Mercury as a Global Pollutant held in Korea in June 2015. The Panel was asked by the conference organizers to address two questions: what is the current understanding of the impacts of mercury exposure on human health and what information is needed to evaluate the effectiveness of the Minamata Convention in lowering exposure and preventing adverse effects...
July 18, 2016: Environmental Research
Mahmoud Bahari, Parnian Alizadeh Oskoee, Siavash Savadi Oskoee, Firoz Pouralibaba, Ali Morsali Ahari
Background. Since it is possible for carbamide peroxide (CP) bleaching agent to contact old amalgam restorations, the present in vitro study evaluated the amount of dissolved mercury released from amalgam restorations with various percent-ages of silver content subsequent to the use of 15% CP. Methods. Thirty ANA 2000 amalgam disks with 43.1% silver content and thirty ANA 70 amalgam disks with 69.3% silver content were prepared. In each group, 15 samples were randomly placed in glass tubes containing 15% CP (as experimental groups) and the remaining 15 samples were placed in buffered phosphate solution (as control groups) with the same 3-mL volume for 48 hours...
2016: Journal of Dental Research, Dental Clinics, Dental Prospects
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 amalgam restorations. METHODS: Standard class V cavities were prepared on the buccal surfaces of 20 non-carious extracted human premolars...
2016: Journal of Environmental Health Science & Engineering
Eman M Khaled, Nagwa A Meguid, Geir Bjørklund, Amr Gouda, Mohamed H Bahary, Adel Hashish, Nermin M Sallam, Salvatore Chirumbolo, Mona A El-Bana
Autism spectrum disorder (ASD) is a complex neurodevelopmental disorder that affects social, communication, and behavioral development. Recent evidence supported but also questioned the hypothetical role of compounds containing mercury (Hg) as contributors to the development of ASD. Specific alterations in the urinary excretion of porphyrin-containing ring catabolites have been associated with exposure to Hg in ASD patients. In the present study, the level of urinary porphyrins, as biomarkers of Hg toxicity in children with ASD, was evaluated, and its correlation with severity of the autistic behavior further explored...
July 13, 2016: Metabolic Brain Disease
Martina Albrecht, Florian Isenbeck, Jüürgen Kasper, Ingrid Mühlhauser, Anke Steckelberg
BACKGROUND: Patients can only make well-informed decisions if the information they are given by health professionals is based on scientific evidence. In this study, we assessed the foundation in evidence of free, publicly available telephone consultations in Germany. METHODS: From March 2013 to January 2014, four hidden clients seeking information asked standardized questions about three medical topics (screening for colorectal cancer, for glaucoma, and for trisomy 21) and three dental ones (the sealing of dental fissures, professional dental cleaning, and mercury detoxification)...
June 6, 2016: Deutsches Ärzteblatt International
Sara Bindoli, Amir Dagan, José J Torres-Ruiz, Carlo Perricone, Mojca Bizjak, Andrea Doria, Yehuda Shoenfeld
Sarcoidosis is a chronic multisystem disease with variable course resulting from the interaction between environmental factors and the immune system of individuals genetically predisposed. The evidence linking sarcoidosis with environmental triggers such as metals is increasing. We describe the case of a 44 year old female with a history. of smoking since age 30 and previous mercury dental filling who presented at physical examination with numerous subcutaneous nodules. Laboratory data showed accelerated erythrocyte sedimentation rate and high titer of anti-U1 ribonucleoprotein antibodies (U1 RNP)...
March 2016: Israel Medical Association Journal: IMAJ
Rohini Rangarao Pawar, Sudha S Mattigatti, Rushikesh R Mahaparale, Amit P Kamble
The pathogenic relationship between the oral lichenoid reaction (OLR) and dental restorative materials has been confirmed many times. An OLR affecting oral mucosa in direct contact with an amalgam restoration represents a delayed, type IV, cell mediated immune response to mercury or one of the other constituents of the dental amalgam. Bombay blood group patients are more prone to this. A case of bilateral OLR is presented, which is present in relation to amalgam restoration. The lesion healed up after the replacement of restorations with an intermediate restorative material...
May 2016: Journal of Conservative Dentistry: JCD
M Sahani, N S Sulaiman, Tan Bs, N A Yahya, Z F Anual, Mahiyuddin Wr Wan Mahiyuddin, Md Firoz Khan, K A Muttalib
Dental amalgam in fillings exposes workers to mercury. The exposure to mercury was investigated in 1871 health care workers. The aim of the study was to evaluate the risk of mercury exposure among dental compared to non-dental health care workers and to determine other risk factors for mercury exposure. Respondents answered questionnaires to obtain demographic, personal, professional and work place information and were examined for their own amalgam fillings. Chronic mercury exposure was assessed through urinary mercury levels...
May 18, 2016: Journal of the Air & Waste Management Association
Uvoh Onoriobe, Michael Miloro, Cortino Sukotjo, Louis G Mercuri, Anthony Lotesto, Ransome Eke
PURPOSE: The purpose of this study is to provide a statistical projection of the number of alloplastic temporomandibular joint (TMJ) total joint replacements (TJRs) that will be performed in the United States through the year 2030. MATERIALS AND METHODS: The program directors of all 101 Commission on Dental Accreditation-accredited oral and maxillofacial surgery training programs in the United States were surveyed online by use of a questionnaire developed using Redcap (Chicago, IL) over a 6-week period (February 2015-March 2015)...
August 2016: Journal of Oral and Maxillofacial Surgery
Faheem Maqbool, Haji Bahadar, Kamal Niaz, Maryam Baeeri, Mahban Rahimifard, Mona Navaei-Nigjeh, Seyedeh Farnaz Ghasemi-Niri, Mohammad Abdollahi
Mercury (Hg) is a well-known heavy metal and causes various toxic effects. It is abundantly present in fish in the form of methyl mercury (MeHg). Also, various other forms of mercury can enter human body either from environment like inhalation or through dental amalgams. The present study was designed to assess MeHg induced toxicity in mouse plasma and pancreatic islets with respect to insulin secretion, oxidative balance, glucose tolerance, gene expression, caspases 3 and 9 activities. MeHg was dissolved in tap water and administered at doses 2...
July 2016: Food and Chemical Toxicology
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