The invention concerns an electronic toothbrush with a cylindrical head, actuated by a DC motor； its operating mode is based on the toothbrushing method referred to as the "roll stroke brushing method"； i.e. the brush should always perform a continuous rotary movement from the gum towards the teeth. Its operating principle implements an accelerometer/temperature sensor gyroscope system (for example a GY-521) that measures the angles formed by the axis of the brush relative to the horizontal plane and transmits the values to a microcontroller, the actual brain where all the controls are stored, which is linked in turn to an H bridge that allows the direction of the current delivered to a DC motor, to which it is linked, to be reversed, depending on the angles. It comprises a handle where the main components that are to be described are assembled, and a cylindrical head with a (semi-cylindrical) working part that will directly face the teeth in order to perform brushing； the other half of the cylinder shall be protected by a semi-cylindrical spacer intended to protect the mucous membranes during brushing； It comprises a start/stop push-button that shall be referred to as the power supply push-button for switching on the power, and two buttons (+) and (-) for increasing or decreasing the speed of rotation of the brush as required. These buttons are linked to the microcontroller to which they transmit pulses and, using a computer program based on the principle of PWM (Pulse Width Modulation), allow the motor to be sped up or slowed down. It also comprises a push-button for switching between the upper and lower modes, depending on the dental arch to be brushed. This is all managed by a computer program supported by the microcontroller (for example, an ATmega 328P)； the temperature sensor allows the current to be cut off in the event of overheating, if required； for this purpose, this component will be positioned as close as possible to the motor in order to ensure the me
