Our mouths are filthy. Brushing, flossing and antiseptic washes can’t remove all bacteria. Very soon after we brush and floss, the bacteria quickly reform plaque in our warm and wet mouths. Most people are busy and don’t have the time to brush and floss every hour on the hour 24–7-365. Therefore we do our best which is to brush and floss 2 to 3 times a day in a never ending losing battle with oral bacteria. In the end, the bacteria always wins.
We are all different. A friend of mine is a 50 year old women who claims that she “never flosses” and yet according to her, her dentist said that she has very healthy gums. I hear of other older folks who take very little care of their teeth and have never had a cavity.
I’m 60 and have been brushing and floss at least 3 times a day for decades and about every tooth in my mouth has e filing or a crown (and one tooth implant). My gums are good only because of the extra hard work that I have devoted to my mouth. I also use a sonicare tooth brush and two different types of anti bacterial mouth rinses. Most people are not willing to put in the effort and so the bacteria rage on inside of their mouths unchecked.