This is an interesting and rather frightening piece of video shot by The International Academy of Oral Medicine and Toxicology which shows mercury vapour coming off an amalgam filling.
Here is an amalgam tooth that has been extracted many years ago, and it clearly shows mercury vapour coming away from it.
The next video is an interview with the Chief Executive of the British Dental Association who gets very angry when questioned about Mercury Toxicity
http://www.youtube.com/watch?v=fq8E84PgP3g&feature=watch_response_rev
