Earlier quoted context omitted.
Honestly, the dental floss is the most fucked PFAS application out of all of them.
No, that is incorrect. PTFE is not a PFAS (it's chemically related, but is not the same). You are perfectly fine with PTFE dental floss - it has no reactive PFAS components in it.
PTFE, the material, does not contain PFAS in bulk form.
That's the end.
Floss, as a product, could contain any number of compounds related to the manufacturing, packaging and coating.