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I'm finally following through on the advice of my dentist to get an electric toothbrush. I haven't owned one in probably 15+ years, in part because models at the time weren't particularly sustainable and I found myself replacing the entire toothbrush every year or two.

Digging around now I'm finding conflicting reviews and testimonials of rechargeable toothbrushes needing to be entirely replaced either at 9 months or 3 years for the same model. Any recommendations from my feed?