(Backordered) Philips Sonicare CleanPlus Brush Heads Regular HX9023/67 (White)Efficient plaque removal: Densely packed, high quality bristles remove plaque from the gum line, promoting healthy gums. The curved bristles also easily reach back teeth. Brush head replacement reminder: The brush head records the brushing time and pressure each time you brush, and a reminder light on the bottom of the handle will light up when it's time to replace the brush head. Sonic water flow: The ultrasonic water flow combines high speed