Here's how it works: Floss between your front teeth (where there is no dental work) and feel the ease of movement. If you can't reproduce this ease of movement, where there is dental work, you have a problem and a place when future dental disease (tooth decay and gum disease) can occur.
Reduced use of floss will require a more intensive focused use of the brush and other aids, e.g. a rubber tip stimulator or toothpick in a special holder. The objective to get every area around the tooth and under the gum. The areas you cannot get to are the one's where problems usually will develop. If you find problems going between dental work, find a dentist that can restore the proper contact (this takes a dentist with good skills). Retest the contact with your fine floss after the new work. I'll talk more about dental restorations at another time.