>"Better yet, shall we say not dangerous at all? Junk science reigns supreme."<
Perhaps. It may well be that it is not an area of concern. Again this is a matter of informed consent.
It depends how toxic elemental mercury is perceived to be. You apparently perceive it to be not very toxic. I perceive otherwise.
The amount of elemental mercury in amalgam fillings is about 50% of the material.
The EPA recognizes that low levels of elemental mercury are in fact released from amalgam fillings:
http://www.epa.gov/ttn/atw/hlthef/mercury.html#ref3
"Another source of exposure to low levels of elemental mercury in the general population is elemental mercury released in the mouth from dental amalgam fillings." (3,4,5)
http://www.atsdr.cdc.gov/toxprofiles/phs46.html
"Once the amalgam is hard, the mercury is bound within the amalgam, but very small amounts are slowly released from the surface of the filling due to corrosion or chewing or grinding motions. Part of the mercury at the surface of the filling may enter the air as mercury vapor or be dissolved in the saliva.
The total amount of mercury released from dental amalgam depends upon the total number of fillings and surface areas of each filling, the chewing and eating habits of the person, and other chemical conditions in the mouth.
Estimates of the amount of mercury released from dental amalgams range from 3 to 17 micrograms per day (µg/day). The mercury from dental amalgam may contribute from 0 to more than 75% of your total daily mercury exposure, depending on the number of amalgam fillings you have, the amount of fish consumed, the levels of mercury (mostly as methylmercury) in those fish, and exposure from other less common sources..."