Some years back I missed a few dental appointments in a row. When I finally went back, I had plenty of tarter and plaque built up on my bottom teeth.
I used to have terrible problems with plaque and had to have dental cleanings every four months but started using 'Plax anti-plaque' mouthwash a couple of years ago (I buy it at Walgreens).
I also paid the cost for an 'electric' Braun toothbrush and it definitely does a more thorough job than I was able to do with a manual toothbrush. It also lets you know when you've brushed for two minutes.
I now only really need to go to the dentist once a year for cleaning and exam instead of three times a year and have saved a good chunk of change, not to mention my teeth.
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