Seriously?

What's the best way to brush teeth? Even dentists and dental associations don't agree

Holey Teeth, Batman!!   You have got to be kidding me.

They only have two pieces of advice- Brush and Floss.
And they've never actually studied one of those?

This is where the cumulative power and intransigence of legacy medical advice is laid bare.
It really doesn't get more basic than this, does it?

Let me give you a hint- most of this stuff doesn't really matter.   They admit right here that it's acid that is the problem... and they never even mention gums.
Maintaining a proper pH and hydration in the mouth is what controls the microbes.
You should drink WHITE TEA after a meal.

While they go figure that out, something you really really should NOT do, is put a bunch of harsh chemicals in your mouth and use a hard twirling scrub brush on your most sensitive tissues.
That seems self evident.