Systems and methods for determining location and orientation of an oral care device

A method for determining a location of a brush head of an oral care device within a user's mouth during an oral care routine, the method comprising:

• determining, during a learning phase, first and second anchor points defining a quadrant of the mouth of the user and a pressure pattern for the defined quadrant based on pressure sensor data from a pressure sensor within the oral care device, wherein the pressure pattern comprises at least two peaks in the pressure sensor data, the at least two peaks corresponding to the first or second anchor points or a tooth within the defined quadrant of the mouth of the user;
• generating, after the learning phase and in response to interaction of the brush head with a plurality of dental surfaces in the defined quadrant during the oral care routine, a pressure signal from the pressure sensor, wherein the pressure signal comprises at least one peak, a longitudinal component indicating a direction the brush head is moving, and a transverse component indicating an amount of pressure exerted on the pressure sensor by the plurality of dental surfaces;
• analyzing, by a controller during the oral care routine, the pressure signal based on the anchor points and the pressure pattern determined during the learning phase;
• and
• estimating, by the controller during the oral care routine, one or more locations of the brush head within the defined quadrant based at least in part on the at least one peak and the longitudinal and transverse components of the pressure signal.