I am very careful about my dental hygiene. A few years ago, I had a brutal hygienist, which cost me a lot of money and caused problems. Vowed never to go to one again (previously had attended annually).
So, took up very careful dental care. Electric brush resting on each tooth for 10 seconds, back and front. Also use good quality mouth wash.
Has worked very well, no build up of plaque, each subsequent visit to dentist has gone well, with no work required, even tooth which I was told was so infected it would require removal, has since recovered and not showing any signs of that infection.
It does take me four minutes both morning and evening to clean my teeth, In the evening I also use the small dental brushes .
As I am approaching 80 yrs, old, with four pregnancies behind me, I feel that this 8-10 minutes spent each day is very worthwhile.
Not sure I am confident in miracle stories about protection against virus, but know that good dental hygiene as with all good hygiene must be good for me.