
I bought these as a cheaper alternative to regular brush heads b. Unfortunately, I found that I didn't like the groove on the brush head. I have sensitivities due to receding gums so I'm looking for softer bristles. I had pain brushing with this brush compared to a regular B brand brush. I like the flat heads and ended up buying another cheaper brand that closely mimics the B series brush. If you don't mind the groove, everything else about this brush head seemed excellent. It worked as expected and the bristles were intact.

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