Tomorrow I go to the dentist for the first time in about 20 years. The reason that I'm finally going isn't because of a toothache but because my wife finally talked me into.
I keep trying to tell myself that the experience won't be as bad as I think. One reason that I've been able to semi-convince myself is that in the past 20 years, I've never had a toothache, and the only time that my gums bleed is if I brush too hard. I do have what appears to be tartar along the gumline.
I've also used fluoride (mainly ACT) once a day since childhood, and Listerine twice a day for about the past 10 years. I brush at least twice a day, and never more than three times a day.
So if I've never had a toothache, a loose tooth or constantly bleeding gums, and I've taken good care of my teeth short of going to a dentist, is it safe to assume that my teeth and gums are in pretty good shape?