I always feel completely fresh after the dentist's. They get to places that we just can't even with fancy electric toothbrushes. Also, you're SUPPOSED to go the dentist every 6 months. That's not too much.

And, the lady is scraping off plaque, which cements itself to the teeth. If you don't get it scraped, plaque can be swallowed, enter your bloodstream and cause heart problems.