Abstract: In a device that includes a vibrating mouthpiece, a source of vibratory movement is connected to a relatively large, relatively stationary mass, or anchor, so the equal and opposite vibrational momentum of the handpiece (plus large mass) results in very little vibrational amplitude of the handpiece-plus-mass, while the active mouthpiece has high vibrational amplitude. In an example, a mouthpiece which engages with a part of a dental arch, is actively cleaning, while a block on the other side of the dental arch acts to anchor the vibration source to the much larger mass of the user's jaw (and head). When the user's jaws grip the block, there will be very little vibration of the handpiece or the user's teeth-jaw-head mass and consequently, the mouthpiece will vibrate at a greater amplitude than it would without the anchor. This leads to greater efficiency of the device.

Abstract: Methods and devices for detecting scrubbing motion during use of a personal hygiene device are provided wherein false scrubbing feedback is eliminated. A method (500) may include receiving (502) motion information data of the personal hygiene device from an inertial measurement unit located within the personal hygiene device, monitoring (504) scrubbing motion data of the personal hygiene device along a first axis, monitoring (506) rotation motion data of the personal hygiene device for excessive rotation around a second axis and a third axis of the personal hygiene device, rejecting (508) a scrubbing detection when excessive rotation is detected, and providing (510) a user operating the personal hygiene device with scrubbing feedback in response to a determination that the motion information data are within predefined parameters of a targeted motion of the personal hygiene device, wherein false scrubbing feedback is eliminated from the scrubbing feedback.

Abstract: The invention provides a method for providing a user with feedback on their technique when using an oral care device. The method includes recording one or more previous oral care sessions and identifying one or more oral care habits based on the recorded one or more previous oral care sessions. Feedback is generated for encouraging the user to adjust an oral care habit of the one or more oral care habits and the user is provided with the feedback during a subsequent oral care session.