Since then, no Hospital Acquired Infections. And - they saved a ton of money by using them instead of N95's.
Not only do they save money, but the respirators are very comfortable. I wear a 3M version myself, and they are so much more comfortable than scratchy FFP3's.
They are also much more protective:
And the HCW's loved them;
I understand if this sounds too good to be true. Here's their website:
At the bottom of that page, is their Respiratory FAQ:
Flossing is necessary for those super tight contact points as you see in the above thread, and is great to remove plaque down 1 mm deep in the gum line (gently).
InterDental Brushes are fantastic and go down 2-3 mm into the gum line to remove plaque.
They basically go back and forth with InterDental Brushes on which is better as far as being the top of the food chain for overall cleaning of the space between your teeth.