An assessment of plaque and gingivitis using a Philips Sonicare 4000-5000 Series* and a manual toothbrush after a four-week period of home use | Philips Sonicare Clinical Study (2022)
Amazon.com : Toothbrush Replacement Heads Compatible with Philips Sonicare, Medium to Soft Electric Brush Head Refills for Sonic Care DiamondClean C1 C2 C3 G2 G3 W2 W3 4100 5100 6100 etc, 8
ProtectiveClean 4100 Sonic electric toothbrush HX6817/31 | Sonicare
Philips® Sonicare® C2 Optimal Plaque Control Refills (3 Count) - Sona Shop
Philips Replacement Brush Heads, Optimal Plaque Control, Medium
Norelco Philips Sonicare C2 Optimal Plaque Control Toothbrush Head | NFM
Philips Sonicare 5100 ProtectiveClean Electric Toothbrush White | Walgreens