Dental Mercury Waste in Our Water, Land and Air

How Does Amalgam Waste Affect The Environment?

If improperly managed by dental offices, dental amalgam waste can be released into the environment.  Dentists should use dental amalgam separators to catch and hold the excess amalgam waste coming from office spittoons. Without dental amalgam separators, the excess amalgam waste will be released to the sewers via drains in the dental offices.  While Publicly-Owned Treatment Works (POTWs) have around a 90% efficiency rate of removing amalgam from wastewaters, a small amount of waste amalgam is discharged from POTWs into surface waters around the plants.

At the treatment plant, the amalgam waste settles out as a component of sewage sludge that is then disposed:

  • in landfills
  • through incineration
  • applied to agricultural land as fertilizer

If the amalgam waste is sent to a landfill, the mercury may be released into the groundwater or air. If the mercury is incinerated, mercury may be emitted to the air from the incinerator stacks. And finally, if mercury-contaminated sludge is used as an agricultural fertilizer, some of the mercury used as fertilizer may also evaporate to the atmosphere. Through precipitation, this airborne mercury eventually gets deposited onto water bodies, land and vegetation. Some dentists throw their excess amalgam into special medical waste (“red bag”) containers, believing this to be an environmentally safe disposal practice. If waste amalgam solids are improperly disposed in medical red bags, however, the amalgam waste may be incinerated and mercury may be emitted to the air from the incinerator stacks.  This airborne mercury is eventually deposited into water bodies and onto land.

You can read this article in it’s complete form on the governments Environmental Protection Agency’s website:  http://www.epa.gov/hg/dentalamalgam.html#contamination

 

The U.S. Calls for the Phase-Out of Amalgam Ultimately

The U.S. Calls for the Phase-Out  of  Amalgam Ultimately.

In an extraordinary developments that will change the global debate about amalgam, the United States government has announced that it supports a “phase down, with the goal for eventual phase out by all Parties, of mercury amalgam.” This statement- a radical reversal of its former position that “any change toward the use of dental amalga is likely to result in poitive public health outcomes” — is part of the U.S. government’s submission for the upcoming third round of negotiations for the world mercury treaty.*

While couched in diplomatic hedging — remember it is still early in the negotiations — this new U.S. position makes three significant breakthroughs for the mercury-free dentistry movement:

The U.S. calls for the phase-out of amalgam ultimately and recommends actions to “phase down” its use immediately.  Incredibly, the government adopted three actions that the World Alliance for Mercury-Free Dentistry and Consumers for Dental Choice proposed at the negotiating session in Chiba, Japan.  Our key ally, The Mercury Policy Project, laid the groundwork for this success at a World Health Organization meeting in 2009!

The U.S. speaks up for protecting children and fetuses from amalgam, recommending that the nations “educate patients and parents in order to protect children and fetuses.”

The U.S. stands up for the human fight of every patient and parent to make educated decisions about amalgam.

What does this mean?  Our position — advocating the phase-out of amalgam — is now the mainstream because the U.S. government supports it.  Who is the outlier now?  It’s the pro-mercury faction, represented by the World Dental Federation and the American Dental Association.  With the U.S. continuing its leadership role in this treaty, we will broadcast the U.S. position to other governments around the world, encouraging them to support amalgam “phase downs” leading to phase-outs not only globally, but within each of their countries.

 

We applaud the U.S. government.  But tough work lies ahead.  For example, we must demonstrate to the world that the available alternatives — such as composites and the adhesive materials used in  atraumatic restorative treatment (“ART”) — can cost less than amalgam and will increase access to dental care particularly in developing countries.

 

For now though, let’s mark this watershed in the mercury-free dentistry movement: the debate has shifted from “whether to end amalgam” to “how to end amalgam.”

 

5 April 2011

Charles G. Brown

National Counsel, Consumers for Dental Choice

President, World Alliance for Mercury-Free Dentistry