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Dental mercury

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https://www.readbyqxmd.com/read/29895371/biomarkers-of-selenium-status-and-antioxidant-effect-in-workers-occupationally-exposed-to-mercury
#1
Renata Kuras, Edyta Reszka, Edyta Wieczorek, Ewa Jablonska, Jolanta Gromadzinska, Beata Malachowska, Lucyna Kozlowska, Magdalena Stanislawska, Beata Janasik, Wojciech Wasowicz
The present observation based research was designed to evaluate the influence of occupational human exposure to metallic mercury (Hg°) vapor on the biomarkers of selenium status involved in the antioxidant defense system. For this purpose we determined Hg and selenium (Se) concentrations in body fluids, the markers of antioxidant effect measured as an activity of Se-dependent enzymes (red blood cell and plasma glutathione peroxidase: GPx1-RBC and GPx3-P), concentration of selenoprotein P in the plasma (SeP-P) and total antioxidant activity in the plasma (TAA-P) in 131 male workers from a chloralkali plant exposed to Hg° and 67 non-exposed males (control group)...
September 2018: Journal of Trace Elements in Medicine and Biology
https://www.readbyqxmd.com/read/29875569/genotoxic-effects-of-silver-amalgam-and-composite-restorations-micronuclei-based-cohort-and-case-control-study-in-oral-exfoliated-cells
#2
S Jeslin Mary, K L Girish, T Isaac Joseph, Pradeesh Sathyan
Context: A huge number of people carry dental fillings which contain either mercury-based amalgam and/or the recently introduced methacrylate-based resins. It has been shown that both these materials are known to be leached into the oral cavity and induce genotoxic alterations in the buccal mucosal cells. Because of its low cost and ease of manipulation, dental amalgam is still widely used as a restorative material in developing countries. The health risks associated with the components of this restorative material has always been a matter of concern...
April 2018: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/29777524/mercury-involvement-in-neuronal-damage-and-in-neurodegenerative-diseases
#3
REVIEW
Veronica Lanza Cariccio, Annalisa Samà, Placido Bramanti, Emanuela Mazzon
Neurodegenerative diseases such as Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, and multiple sclerosis are characterized by a chronic and selective process of neuronal cell death. Although the causes of neurodegenerative diseases remain still unknown, it is now a well-established idea that more factors, such as genetic, endogenous, and environmental, are involved. Among environmental causes, the accumulation of mercury, a heavy metal considered a toxic agent, was largely studied as a probable factor involved in neurodegenerative disease course...
May 18, 2018: Biological Trace Element Research
https://www.readbyqxmd.com/read/29772190/serum-metal-levels-in-maxillofacial-reconstructive-surgery-patients-a-pilot-study
#4
Louis G Mercuri, Michael Miloro, Anastasia K Skipor, Divya Bijukumar, Cortino Sukotjo, Mathew T Mathew
PURPOSE: The aim of this pilot study was to assay metal concentrations in the serum of patients who had undergone dental implant placement, orthognathic surgery using rigid metal fixation plates and screws, and total temporomandibular joint replacement (TMJ TJR). MATERIALS AND METHODS: Thirty patients were identified and included in this pilot study. Sixteen patients (9 men and 8 women), with an average age of 44 years (range, 19 to 79 yr), provided informed consent to participate and were divided into 3 study groups with 4 patients in each (group 1, orthognathic surgery; group 2, TMJ TJR; and group 3, dental implant placement)...
April 21, 2018: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29734617/blood-mercury-lead-and-cadmium-levels-and-determinants-of-exposure-among-newcomer-south-and-east-asian-women-of-reproductive-age-living-in-vancouver-canada
#5
Linda Dix-Cooper, Tom Kosatsky
BACKGROUND: Biomarkers of the reproductive and neuro-developmental toxicants mercury (Hg), lead (Pb) and cadmium (Cd) have been found at higher concentrations in women born outside Canada than in Canadian-born women. We measured blood Hg, Pb and Cd in women ages 19 to 45years living in greater Vancouver (Canada) within five years of their arrival from South Asia (India) or East Asia (mainland China, Hong Kong and Taiwan) and related their biomarker concentration levels with exposures and behaviors since their coming to Canada...
April 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29732349/-triple-m-effect-a-proposed-mechanism-to-explain-increased-dental-amalgam-microleakage-after-exposure-to-radiofrequency-electromagnetic-radiation
#6
Gh Mortazavi, S A R Mortazavi, A R Mehdizadeh
A large body of evidence now indicates that the amount of mercury released from dental amalgam fillings can be significantly accelerated by exposure to radiofrequency electromagnetic fields (RF-EMFs) such as common mobile phones and magnetic resonance imaging (MRI). Studies performed on the increased microleakage of dental amalgam restorations after exposure to RF-EMFs have further supported these findings. Although the accelerated microleakage induced by RF-EMFs is clinically significant, the entire mechanisms of this phenomenon are not clearly understood...
March 2018: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/29713443/prenatal-mercury-exposure-and-features-of-autism-a-prospective-population-study
#7
Jean Golding, Dheeraj Rai, Steven Gregory, Genette Ellis, Alan Emond, Yasmin Iles-Caven, Joseph Hibbeln, Caroline Taylor
Background: Mercury (Hg) has been suspected of causing autism in the past, especially a suspected link with vaccinations containing thiomersal, but a review of the literature shows that has been largely repudiated. Of more significant burden is the total quantity of Hg in the environment. Here, we have used the Avon Longitudinal Study of Parents and Children (ALSPAC) to test whether prenatal exposure from total maternal blood Hg in the first half of pregnancy is associated with the risk of autism or of extreme levels of autistic traits...
2018: Molecular Autism
https://www.readbyqxmd.com/read/29673741/cross-sectional-observational-study-exploring-clinical-risk-of-titanium-allergy-caused-by-dental-implants
#8
Maki Hosoki, Keisuke Nishigawa, Toyoko Tajima, Mayu Ueda, Yoshizo Matsuka
PURPOSE: Studies have reported cases of metal allergy caused by titanium-containing materials. We wished to clarify the relationship between titanium allergy and dental implants by describing patients who suffered allergic symptoms after they had received such implants. METHODS: A total of 270 patients who visited a Dental Metal Allergy Clinic at Tokushima University Hospital from April 2010 to March 2014 were the study cohort. Patch testing with 28 types of metal allergens (including four titanium allergens) was undertaken for patients...
April 16, 2018: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29482185/mercury-exposure-and-health-impacts-in-dental-personnel
#9
REVIEW
Jan Aaseth, Bjørn Hilt, Geir Bjørklund
Based on toxicological, clinical, and epidemiological knowledge, the present paper reviews the status regarding possible deleterious health effects from occupational exposure to metallic mercury (Hg) in dental practice. Symptoms from the central nervous system are among the health problems that most often are attributed to Hg exposure in dentists and dental nurses working with amalgam. Uncharacteristic symptoms of chronic low-level Hg vapor exposure including weakness, fatigue, and anorexia have been observed in numerous studies of dental personnel...
July 2018: Environmental Research
https://www.readbyqxmd.com/read/29313075/children-s-hair-mercury-concentrations-and-seafood-consumption-in-five-regions-of-japan
#10
Emiko Kusanagi, Hitoshi Takamura, Shing-Jen Chen, Mayumi Adachi, Nobuko Hoshi
Exposure to methylmercury (MeHg) during the foetal and postnatal periods is known to have adverse effects on children's development. However, little attention has been paid to MeHg exposure during early childhood in Japan. To examine the regional differences in MeHg exposure and seafood consumption and the association between MeHg exposure and seafood consumption and dental metal restorations, we measured the total mercury (T-Hg) concentration in hair as an MeHg exposure index, and using questionnaires, we measured the frequency and amount of seafood consumption and the presence of dental metal restorations in 118 children aged 3-6 years in five regions of Japan...
February 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29302906/toxic-heavy-metals-in-human-blood-in-relation-to-certain-food-and-environmental-samples-in-kerala-south-india
#11
Anitha Jose, Joseph George Ray
Toxic heavy metals such as arsenic (As), lead (Pb), and mercury (Hg) are systemic toxicants that are hazardous to human health. However, as these elements are increasing in the environment due to fast urbanization, industrialization, and chemicalized agricultural activities, accumulation of the same in human body anywhere in the world is quite interesting to global assessment of environment quality. In this connection, random examination of blood samples of human population in Kerala, South India, was carried out to assess the threat of heavy metal contamination to humans in this part of the globe, especially in relation to the amount of such metals in food and other environmental samples...
March 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29284940/recovery-of-mercury-from-dental-amalgam-scrap-indian-perspective
#12
Kadandale Sadasiva, Sreeram Rayar, Unnikrishnan Manu, Kumarappan Senthilkumar, Srinivasan Daya, Nagarajan Anushaa
Aim: The aim is to recycle mercury from dental amalgam scrap using the vacuum distillation method. Materials and Methods: A total of 150 g of dental amalgam scrap was taken in a round bottom flask and was subjected to vacuum distillation at 398°C. The vapor of mercury was collected in another round bottom flask. Observation: The procedure is carried out for mercury recovery using vacuum distillation apparatus, and mercury vapor are collected in a round bottom flask, and the silver is recovered using sucrose as reducing agent...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29279688/dental-amalgam-fillings-and-the-use-of-technological-devices-as-an-environmental-factor-updating-the-cumulative-mercury-exposure-based-hypothesis-of-autism
#13
Isadora Argou-Cardozo, José Antonio Cano Martín, Fares Zeidán-Chuliá
No abstract text is available yet for this article.
October 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/29245125/delayed-type-hypersensitivity-to-metals-in-connective-tissue-diseases-and-fibromyalgia
#14
REVIEW
Geir Bjørklund, Maryam Dadar, Jan Aaseth
Rheumatic diseases include a group of autoimmune disorders with environmental and genetic etiology that are characterized as a subgroup of connective tissue diseases (CTD). Rheumatoid arthritis (RA) often involves the small joints of the hands in a symmetrical fashion that can lead to loss of joint function, and RA, as well as Sjögren's syndrome (SS) and other rheumatic diseases, are often accompanied by sensitivity to metals. Numerous investigations on metal sensitivity were evaluated in this review. A detailed metal exposure history was collected by different evaluation of studies...
February 2018: Environmental Research
https://www.readbyqxmd.com/read/29146212/the-current-environmental-levels-of-endocrine-disruptors-mercury-cadmium-organochlorine-pesticides-and-pcbs-in-a-belgian-adult-population-and-their-predictors-of-exposure
#15
Catherine Pirard, Stephanie Compere, Katty Firquet, Corinne Charlier
A human biomonitoring study was carried out measuring the levels of endocrine disruptors in 252 participants (18-76 years old) recruited between February and May 2015 from the general population of Liege Province (Belgium). In this study, we reported the recent levels of cadmium and mercury in urine, some organochlorine pesticides and polychlorinated biphenyls (PCBs) in serum, and their relations to demographic characteristics, lifestyle behaviors and dietary habits. The median urinary levels of mercury and cadmium were 0...
March 2018: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/29113700/high-performance-dental-resin-composites-with-hydrolytically-stable-monomers
#16
Xiaohong Wang, George Huyang, Sri Vikram Palagummi, Xiaohui Liu, Drago Skrtic, Carlos Beauchamp, Rafael Bowen, Jirun Sun
OBJECTIVE: The objectives of this project were to: 1) develop strong and durable dental resin composites by employing new monomers that are hydrolytically stable, and 2) demonstrate that resin composites based on these monomers perform superiorly to the traditional bisphenol A glycidyl dimethacrylate/triethylene glycol dimethacrylate (Bis-GMA/TEGDMA) composites under testing conditions relevant to clinical applications. METHODS: New resins comprising hydrolytically stable, ether-based monomer, i...
February 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29102860/presence-of-dental-signs-of-congenital-syphilis-in-pre-modern-specimens
#17
REVIEW
Stella Ioannou, Renata J Henneberg, Maciej Henneberg
OBJECTIVE: Tooth morphology can vary due to genetic factors, infectious diseases and other environmental stresses. Congenital syphilis is known to interrupt tooth formation i.e. odontogenesis and amelogenesis, producing specific dental characteristics. Variation of those characteristics can occur, resulting in dental signs "not typical" of the disease, however, they are described in the 19th century literature. Past treatments of congenital syphilis with mercury also interrupted dental processes resulting in significantly different dental signs...
January 2018: Archives of Oral Biology
https://www.readbyqxmd.com/read/29057586/mercury-levels-in-hair-samples-of-dentists-a-comparative-study-in-sri-lanka
#18
Lumbini A Wijesekara, Rinzee Usoof, Sachindra S T Gamage, Ruwan Jayasinghe, Nandasena Gamage, Dileep De Silva, Sagarika Ekanayake
AIM: Elemental mercury is widely used in dentistry as dental amalgam. Hair samples constitute preferred biomarkers to determine the index of mercury exposure. In the absence of any published studies, the aim of the present study was to ascertain the level of mercury in a selected sample of dentists and controls in Sri Lanka. METHODS: Hair samples (.7 g) from dentists working in and around the Colombo district in Sri Lanka (n = 50) and controls (n = 50) were digested with sulfuric acid-potassium permanganate solution, and reduced to metallic mercury with stannous chloride...
October 22, 2017: Journal of Investigative and Clinical Dentistry
https://www.readbyqxmd.com/read/29052151/hair-mercury-and-risk-assessment-for-consumption-of-contaminated-seafood-in-residents-from-the-coast-of-the-persian-gulf-iran
#19
Narjes Okati, Abbas Esmaili-Sari
The health risks of mercury exposure due to the high consumption of aquatic were assessed for fishermen and non-fishermen families living on the Bandar Abbas, Bushehr, and Mahshahr cities located in the coast of Persian Gulf (Iran). The mean hair mercury concentration of people in Bandar Abbas, Bushehr, and Mahshahr cities was obtained 1.56 ± 0.17, 1.97 ± 0.22, and 5.12 ± 0.3 μg g-1 , respectively. Hair mercury concentration in 8.8% of people exceeded the no observed adverse effects level (NOAEL) of 10 μg g-1 declared by the World Health Organization (WHO)...
January 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29043874/the-risk-of-occupational-exposure-to-mercury-vapor-in-some-public-dental-clinics-of-baghdad-city-iraq
#20
Enas Sultan Al-Zubaidi, Adel Mashaan Rabee
BACKGROUND: Dental workers are exposed to elevated levels of elemental mercury vapor substantially above the occupational exposure standards when placing or removing mercury/silver tooth restorations and disposing of mercury waste. This results in a significant increase in occupational exposure and risk of mercury intoxication. METHODS: To evaluate the occupational exposure of dental workers to amalgam in four dental clinics in Baghdad city, the concentrations of mercury vapor were measured seasonally from February to November 2016...
August 2017: Inhalation Toxicology
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