Philips’ Sonicare range of brush heads works via side-to-side motion ... Gum Care was formerly ProResults Gum Health Sonicare C2 Optimal Plaque Defence was formerly ProResults Plaque Control ...
The Sonicare 4100 is a bit pricier; the brush starts at $49.95, and the cheapest replacement brush head is $8.32. Philips also has a brush head subscription service starting at $7.99 every three ...
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