Oh Really

P. gingivalis needs iron to survive.   Apparently it can dissolve stainless steel.   It increases growth in the presence of stainless steel.   Like dental appliances.  Braces.   Implant screws.   Piercing jewelry...

Not to mention: Most pathogenic bacteria scavenge iron.      

In vitro corrosion studies of stainless-steel dental substrates during Porphyromonas gingivalis biofilm growth in artificial saliva solutions: providing insights into the role of resident oral bacterium

(insert roll-eyes and curse words here.)

edit:

Fracture pins, surgical staples.   Hypodermic needles includling long term cannulas!

Holy shit, they use it for aritficial joints due to arthritis!!!

CORONARY ARTERY STENTS!!!!!

(infinite scream...)