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> One may conclude that the removing of these amalgams may cause more harm > effects (due to the dusting,or vaporization, of it caused by the drilling > process) than leave it were it is . > > Would you agree on that ? > Dear Joao: It depends on the way the filling is removed, but even then mercury is no longer mercury because the amalgam is an alloy even as dust particles and no free mercury should be available to poison the air.