How does it make you feel knowing that you're poisoning your patients with the neurotoxin mercury?

Just curious. Why do dentists still use mercury in dentistry? Why is mercury considered toxic waste before placing it into the mouth of a patient but when placed into the mouth as an amalgam it's considered safe? Even the ADA admits mercury leeches and vaporizes 24/7 from mercury amalgam. Logic then tells you that amalgam is dangerous. Mercury amalgam is most dangerous when being removed. Most dentists don't practice safe mercury amalgam removal and end up harming their patients. Here's some studies about the harm of mercury amalgam for you to ponder on.

http://www.ncbi.nlm.nih.gov/pubmed/21232090 http://www.ncbi.nlm.nih.gov/pubmed/21173523 http://www.ncbi.nlm.nih.gov/pubmed/20406270

When are dentists going to get their heads out of their asses and stop poisoning their patients?