Nylander M, Friberg L & Lind B. Mercury concentrations in the human brain and kidneys in relation to exposure from dental amalgam fillings. Swed Dent J 11:179-187 (1987)

Abstract: "Samples from the central nervous system (occipital lobe cortex, cerebellar cortex and ganglia semilunare) and kidney cortex were collected from autopsies and analysed for total mercury content using neutron activation analyses. Results from 34 individuals showed a statistically significant regression between the number of tooth surfaces containing amalgam and concentration of mercury in the occipital lobe cortex (mean 10.9, range 2.4-28.7 ng Hg/g wet weight). The regression equation y=7.2 + 0.24x has a 95% confidence interval for the regression coefficient of 0.11-0.37. In 9 cases with suspected alcohol abuse mercury levels in the occipital lobe were, in most cases, somewhat lower than expected based on the regression line. The observations may be explained by an inhibition of oxidation of mercury vapour. The regression between amalgams and mercury levels remained after exclusion of these cases. The kidney cortex from 7 amalgam carriers (mean 433, range 48-810 ng Hg/g wet weight) showed on average a significantly higher mercury level than those of 5 amalgam-free individuals (mean 49, range 21-105 ng Hg/g wet weight). In 6 cases analysis of both inorganic and total mercury was carried out. A high proportion (mean 77% SD 17%) of inorganic mercury was found. It is concluded that the cause of the association between amalgam load and accumulation of mercury in tissues is the release of mercury vapour from amalgam fillings."

Nylander M & Weiner J. Mercury and selenium concentrations and their interrelations in organs from dental staff and the general population. Br J Ind Med 48:729-734 (1991)

Abstract: "Mercury (Hg) and selenium (Se) concentrations were determined by radiochemical neutron activation analysis in samples from the glands, occipital cortices, renal cortices, abdominal muscles, and thyroid glands of cadavers. Samples were retrieved from dental staff occupationally exposed to Hg and from the general population. Increased concentrations of both Hg and Se in samples from dental staff showed that Se accumulated together with Hg. Regression analysis of data from the pituitary glands and occupational cortices of dental staff indicated the accumulation of Se at a rough stoichiometric ratio of 1:1 with Hg. The same stoichiometric ratio between the elements was seen in the renal cortices from the general population. The regression analysis showed that a substantial fraction of Se was not associated with Hg; it is assumed that this corresponds to biologically available Se. Concentrations of biologically available Se decreased advancing age in the pituitary gland, but not in other organs, and varied appreciably between organs."

Ortendahl TW, Hogstedt P & Holland RP. Mercury vapor release from dental amalgam in vitro caused by magnetic fields generated by CRT's and electrical cutting procedures. Swed Dent J 1991 p 31 Abstract 22

Abstract: "People working in front of a cathode-ray tube screen (CRT) and who report they are negatively affected, sometimes complain about symptoms often related to "Oral galvanism". Another group of workers, occupationally exposed to magnetic fields, are divers, welding and cutting electrically under water. It has been repoerted (Ortendahl et. al. J. Undersea Biomed Res 1988;15:443-456) that the magnetic field flux density intraoraly at a certain current and with a specific distance relation between the oral cavity and the electric cord was 1.12 mT with a specific frequency spectra. Exposure of amalgam specimens to a magnetic field with 1.15 mT (50 Hz) caused and chemical changes on the surfaces of the dental amalgams. Therefore, the aim of the study was to analyze if work in front of a CRT-screen would have any influence on the mercury vapor release from dental amalgam. The aim was also to analyze if a magnetic field with a complex frequency spectra and a flux density of 1.15 mT would influence the mercury vapor release. Materials and Methods: 5 CRT-screens were selected as sources for the magnetic field exposure. The criterias for the selection of screens were: 1 occurring frequently in swedish officies, 2. compensated and uncompensated screens with respect to the megnetic fields. From three types of dental amalgams, representative to swedish dentistry, cylindrical amalgam specimens were prepared and were immersed in artificial saliva in an electrolytic cell. The electrolytic cells were located exactly in front of the CRT-screens with a distance amalgam - CRT-screen of 50 cm during 6 hours. On a specific electrolytic cell, coils were adapted and supplied with a current to the electrical cutting situation. The created field had a complex frequency spectra in order to create a more realistic simulation of the in vivo situation than the earlier used 50 Hz field. The mercury vapor release (Hg0) was registered continously and were determined by a gold-foil mercury vapor analyzer (Jerome 411). As control served amalgam specimens, not exposed to a magnetic field but immersed in the artificial saliva and a reference group which were not exposed to either the magnetic fields or artificial saliva. Results and Conclusion: 2 of the CRT-screens significantly increased the mercury vapor release from all three types of amalgam. One of these two screens were compensated and one were uncompensated. The magnetic fields which were supposed to simulate the electrical cutting situation did not cause any increased mercury vapor release. The study was supported by The Swedish Work Environmental found."

Osterblad M, Leistevuo J, Leistevuo T, Jarvinen H, Pyy L, Tenovuo J & Huovinen P. Antimicrobial and Mercury Resistance in Aerobic Gram-Negative Bacilli in Fecal Flora among Persons with and without Dental Amalgam Fillings.

Antimicrobial agents and chemotherapy 39(11):2499 (1995)

Abstract: "Antimicrobial resistance is more widespread than can be accounted for as being a consequence of the selection pressure caused by the use of antibiotics alone. In this study, we tested the hypothesis that a high mercury content in feces might select for mercury-resistant bacteria and thus for antimicrobial resistance linked to mercury resistance. Three subject groups with different exposures to dental amalgam fillings were compared. None of the subjects had taken antimicrobial agents during the three preceding months or longer. The group exposed to dental amalgam (n = 92) 13 times more mercury in feces than the group that had never been exposed to amalgam (n = 43) and the group whose amalgam fillings had been removed (n = 56). No significant differences in either mercury resistance or antibiotic resistance in the fecal aerobic gram-negative flora of these subject groups were seen. The following antimicrobial resistance frequencies were detected with a replica plating method: > or = 1% resistance was seen in 40% of the subjects for ampicillin, 14% of the subjects for cefuroxime, 6% of the subjects for nalidixic acid, 14% of the subjects for trimethoprim, 19% of the subjects for sulfamethoxazole, and 25% of the subjects for tetracycline. The amount of mercury in feces derived from amalgam was not selective for any resistance factors in aerobic gram-negative bacteria, antimicrobial resistance was widespread even among healthy subjects with no recent exposure to antibiotics."

Also make sure to read these books: Poison in Your Teeth: Mercury Amalgam (Silver) Fillings...Hazardous to Your Health! and Mercury Detoxification by Tom McGuire