Mercury poisoning & dental amalgam


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Mercury poisoning & dental amalgam

  1. 1. Mercury poisoning (also known as hydrargyria or mercurialism) is a disease caused by exposure to mercury or its compounds. Mercury (chemical symbol Hg) is a heavy metal occurring in several forms, all of which can produce toxic effects in high enough doses.
  2. 2. Toxic effects include damage to the brain, kidney, and lungs. Mercury poisoning can result in several diseases, including:- [1] acrodynia (pink disease), [2] Hunter-Russell syndrome, [3] Minamata disease. 1 3
  3. 3.  peripheral neuropathy (presenting as paresthesia or itching, burning or pain),  skin discoloration (pink cheeks, fingertips and toes),  swelling,  desquamation (shedding of skin).
  4. 4.  bleeding gums  alveolar bone loss  loosening of teeth  excessive salivation  foul breath  metallic taste  burning sensation, with tingling of lips, face  tissue pigmentation (amalgam tattoo of gums)  stomatitis (sores in the mouth)  ulceration of gingiva, palate, tongue
  5. 5.  The silver fillings used by dentists to restore teeth are composed of a metal "amalgam" containing roughly 50% elemental mercury and 50% other metals (mostly silver with some tin and copper).  The mercury found in amalgam fillings has raised some safety concerns over the years. Amalgam can release small amounts of mercury vapor over time, and patients can absorb these vapors by inhaling or ingesting them.
  6. 6. Dentists all over the world remove millions of amalgam fillings every day, with no regard for the possible mercury exposure that can result from grinding them out. Taking out fillings with a high speed dental bur generates a cloud of particles, at least 65% of which are one micron or less in size. These are fully respirable, get deep into the lungs, where the microscopic particles are broken down and the mercury is systemically absorbed within a few days. The mercury free dentists of the world have been acutely aware of the excess exposure problem, and have devised a number of strategies for reducing the amount of mercury exposure to both patients and dental staff during amalgam removal.
  7. 7. are chemical substances that contain molecules capable of bonding securely to minute particles of metal called ions. In addition to directly supporting vital body functions, this bonding process---called chelation---provides a means of trapping harmful metals in your bloodstream and making them susceptible to safe excretion in urine. The process of chelation, called chelation therapy, is commonly used in the treatment of heavy metal poisoning.
  8. 8.  Chelation therapy for acute inorganic mercury poisoning can be done with DMSA, 2,3-dimercapto-1-propanesulfonic acid (DMPS), D- penicillamine (DPCN), or dimercaprol (BAL).[1] Only DMSA is FDA- approved for use in children for treating mercury poisoning.
  9. 9. side effects of EDTA use that include burning at the site of intravenous treatment and allergic reactions to the chelating agent. In some cases, you may also experience serious side effects such as nausea, headaches, low blood sugar, low blood calcium, irregular heartbeat, seizures, organ damage and kidney failure. The Centers for Disease Control and Prevention have also reported some fatalities resulting from low calcium levels associated with chelation therapy.