Soft, precisionshaped 45° angled brush heads helps assure the proper, ADA recommended brushing angle is maintained and superior cleaning is realized. Set of two."Designed by Supersmile, makers of the #1 recommended Whitening System by cosmetic dentists, the Professional Series II LS45 Advanced Sonic Pulse™oothbrush combines stateoftheart Sonic technology with a 45 degreeangled Brush Head that cleans below the gum line and ensures brushing at the ADArecommended 45 degree brushing angle.With their precision shape, the 45 degreeangled Replacement Brush Heads remove plaque and bacteria while polishing and whitening tooth enamel with soft, polished, rounded nylon bristles that are safe and gentle on natural teeth, caps, bonding, dentures, veneers, as well as sensitive