My holistic dentist gave me a booklet regarding Amalgam removal. The procedure they recommend is putting a small paste of chlorella and charcoal mixture under the the tongue during removal under the rubber dam, because, they tested the air quality under the dam during removal even though, yes they used high powered air vaccuum in the mouth, the air quality under the rubber dam (without any chlorella charcoal pastie) indicated that there was an elevated quantity of mercuric dust particles concentrated in that spot. The authors were two dentists whose last names both begin with Z. They recommend putting in a new chlorella charcoal pastie in for each quadrant done to absorb the merc dust.