chris10
I did'nt read the full text of the Bergman article but I did read the abstract.They question the accuracy of the Jerome mercury vapor meter.The Jerome meter is accepted world wide as an accurate measure of hg vapor . You claim that the toxic level of hg is 25 microgms/M3. Actually,the max level is set at .1 to .3 microgms/day by most agencies such as ASTDR,EPA,CDC USPHS and WHO for non industrial exposure.Industrial exposure is different since it is for 40 or less hours out of a 168 hour week.Also there are factors which decrease absorption in industial settings. Many countries now set the limit at one microgm/m3 in industrial settings.
You state that one cannot determine hg exposure from hg vapor readings. Actually, this can be done and it has been determined that .1 microgms/M3 results in approx. 4 microgms hg per day.You state that one cannot determine exact hg vapor exposure from fillings because it depends on factors such as gum chewing,age of fillings etc. You have a great talent for pointing out the obvious.Hg vapor exposure from fillings is astronomically higher than the maximum allowable figure of .1 to .3 microgms/M3 leading to daily doses far more than 4-6 microgms so that it is unneccessary to determine exact figures.
Some of the researchers who have measured hg vapor levels are Svare ,Vimy, Gay and Lichtenberg,Feldman and Sallesten and Utt.Utt found 50-150 microgms/m3 after chewing gum.Gay found that the average filling releases 34 microgms/hg/day so if you have 15 of them your daily dose of poison is 510 microgms (10 microgms total from all sources is toxic).Longworth found that after brushing tetth hg vapor went fron 6 to 54 microgms /M3.After chewing gum or brushing teeth hg levels are elevated for 90 min and mercury levels are much higher in people with
Amalgam even if they havent chewed or had hot drinks in several hours. Barregard found that people with TMJ can be exposed to 500 microgms/day.
Bergman claims that
Amalgam hg exposure is 1-2 microgms /day. If a person with many fillings spits, their saliva has far more than one microgm hg according to U of Tubingen researchers ,Piccichini and many others and of course this is a fraction of daily hg poisoning.
If one chews gum one hour a day and thus raises their level of hg exposure to 50 microgms/M3 ,they are way over the 4-6 microgms/day allowed by most agencies which of course does'nt include TMJ exposure, eating, drinking hot drinks . Also,baseline hg levels in people with
Amalgam are several times higher than controls.
If chewing gum raises hg vapor levels to 50 microgms/M3 for one hour,then this one hour of gum chewing raises one's daily hg exposure by around 40 microgms.