I always brushed and flossed regularly and at 79 I still have all of my teeth and no fillings. I'd always used an ordinary tooth brush while my wife used an electric but given my dental history, didn't see a need. At every 6-month check up there was lots of plaque to be scraped off. Then the hygienist recommended the Sonicare and I said, what the heck, guess I could give it a try and bought the high end model. Much to my surprise, by teeth always have that "just left the dentist" slick, clean feeling after 5 months since my last cleaning. Love the Sonicare and can't image ever going back to an ordinary toothbrush.