A dental cleaning device for simultaneously brushing at a plurality of dental positions, comprising: - a mouthpiece having a pressure chamber and a recess which is U-shaped in cross section and delimited by a flexible and/or deformable recess wall, the pressure chamber being configured for containing a fluid under pressure, - a plurality of bristles, each attached to the recess wall with one end thereof and extending from said recess wall into the recess; - a pump unit arranged in fluid communication with said pressure chamber, the pump unit being configured to reciprocatingly increase and decrease a pressure in the pressure chamber between an increased pressure condition and a decreased pressure condition by pumping a volume of fluid into, respectively out of, the pressure chamber, thereby deforming the recess wall and moving the recess wall back and forth increasing respectively decreasing the recess, characterised, in that the dental cleaning device further comprises: - a pressure sensor configured to measure a pressure representative of the pressure in the pressure chamber and to produce a pressure signal representative of said pressure, and - a controller configured to generate a control signal; wherein the pressure sensor and the controller are connected such that the controller, in use, receives the pressure signal from the pressure sensor and the controller and pump unit are connected such that the pump unit, in use, receives the control signal from the controller; wherein the controller is configured to generate the control signal in dependence on the pressure signal and the pump unit is configured to provide a delivery into and/or out of the pressure chamber in response to the control signal; and wherein the controller is configured to reduce the delivery of the pump unit when the pressure in the pressure chamber exceeds a predetermined upper threshold. - a mouthpiece having a pressure chamber and a recess which is U-shaped in cross section and delimited by a flexible and/or deformable recess wall, the pressure chamber being configured for containing a fluid under pressure, - a plurality of bristles, each attached to the recess wall with one end thereof and extending from said recess wall into the recess; - a pump unit arranged in fluid communication with said pressure chamber, the pump unit being configured to reciprocatingly increase and decrease a pressure in the pressure chamber between an increased pressure condition and a decreased pressure condition by pumping a volume of fluid into, respectively out of, the pressure chamber, thereby deforming the recess wall and moving the recess wall back and forth increasing respectively decreasing the recess, characterised, in that the dental cleaning device further comprises: - a pressure sensor configured to measure a pressure representative of the pressure in the pressure chamber and to produce a pressure signal representative of said pressure, and - a controller configured to generate a control signal; - a pressure sensor configured to measure a pressure representative of the pressure in the pressure chamber and to produce a pressure signal representative of said pressure, and - a controller configured to generate a control signal; wherein the pressure sensor and the controller are connected such that the controller, in use, receives the pressure signal from the pressure sensor and the controller and pump unit are connected such that the pump unit, in use, receives the control signal from the controller; wherein the controller is configured to generate the control signal in dependence on the pressure signal and the pump unit is configured to provide a delivery into and/or out of the pressure chamber in response to the control signal; and wherein the controller is configured to reduce the delivery of the pump unit when the pressure in the pressure chamber exceeds a predetermined upper threshold.