Sonic Technology for a Thorough Daily Clean
As a sonic toothbrush, the HX9911/29 relies on rapid brush-head vibration rather than the rotating motion used by oscillating models. Many people find sonic brushing gentle on the gums while still leaving teeth feeling noticeably clean. If you are moving up from a manual brush, sonic action takes much of the scrubbing work off your hands, letting you guide the head slowly from tooth to tooth instead of brushing hard.










