Powered toothbrush systems that provide improved bristle positioning and bristle contact with tooth surfaces that reduce the time and effort required for effective brushing. Some embodiments use alternating or oscillating pneumatic pressure and suction to move a toothbrush head. Various configuration of the brush head provide different areas of coverage ranging from individual tooth to quarter mouth (U-cross section), to half (U-cross section or H-cross section) or whole mouth (U-cross section or H-cross section) coverage. Some embodiments include flexible fingers and/or bladders to keep the bristle tips properly engaged with the teeth and gums, providing bristle contact over a wide variety of malocclusion. The shape of the brush heads adapts to conform closely to the shape of the user's dental tray and to any malocclusion that may be present. The powered toothbrush automatically generates motion of the brush head that simulates the Modified Bass Method of brushing.

A method of treating teeth and gums within an oral cavity including treating the accessible surfaces and hard-to-reach surfaces of the teeth and gums. The method includes providing an oral care composition including a therapeutic amount of sodium bicarbonate, providing a tool that generates hydrodynamic power, and applying the oral care composition to the accessible surfaces and the hard-to-reach surfaces of the teeth and gums and generating hydrodynamic power within the oral cavity. The combination of the oral care composition and the hydrodynamic power more effectively removes biofilm from the accessible surfaces and the hard-to-reach surfaces of the teeth and gums.

Disclosed is a multi-functional visual electric toothbrush, including a main unit, an oral viewer, an interdental cleaning appliance and an electric toothbrush head. The oral viewer is connected to the main unit, the interdental cleaning appliance is connected to the front end of the oral viewer, and the electric toothbrush head is connected to a toothbrush driving mechanism. A circuit system and a control system of the main unit can not only transfer the energy of a power supply to the toothbrush driving mechanism, so as to drive the electric toothbrush head to work for large-area oral cleaning, but also connect a lighting system, an observation system and a switch of the oral viewer to control the oral viewer to work. The interdental cleaning appliance may be used cooperatively with the oral viewer to perform targeted cleaning on difficult-to-clean food debris in an oral cavity.

Disclosed is a multi-functional visual electric toothbrush, including a main unit, an oral viewer, an interdental cleaning appliance and an electric toothbrush head. The oral viewer is connected to the main unit, the interdental cleaning appliance is connected to the front end of the oral viewer, and the electric toothbrush head is connected to a toothbrush driving mechanism. A circuit system and a control system of the main unit can not only transfer the energy of a power supply to the toothbrush driving mechanism, so as to drive the electric toothbrush head to work for large-area oral cleaning, but also connect a lighting system, an observation system and a switch of the oral viewer to control the oral viewer to work. The interdental cleaning appliance may be used cooperatively with the oral viewer to perform targeted cleaning on difficult-to-clean food debris in an oral cavity.

A brush of the present disclosure includes a head and a body. The head includes bristles extending in a first direction. The body includes an actuator configured to expand and contract in a second direction intersecting the first direction and a connection member configured to transmit vibration of the actuator to the head.

Disclosed is an electric toothbrush, comprising: a handle; a drive element provided in the handle, an output shaft of the drive element extending out of the handle; a brush head disposed at one end of the output shaft remote from the handle and connected to the output shaft; and a stress triggering element and a stress detecting element, which are oppositely provided on surfaces of the output shaft; wherein the stress triggering element is configured for producing stress concentration at the position where the stress triggering element is located when the output shaft motions; and the stress detecting element is configured for detecting the stress at the position where the stress triggering element is located, thereby obtaining a pressure corresponding to the stress, the electric toothbrush as provided offers a simple structure for pressure detection.

Provided is a cleaning device for personal cleaning and care, comprising a cleaning device housing detachably connected to a handle housing, a bracket for supporting the cleaning device, a cleaning element carrier and cleaning elements distributed on the cleaning element carrier, a passive assembly, and a cleaning device transducer. The cleaning device transducer comprises at least two transducer elastic elements; one end of each transducer elastic element is fixedly connected to a corresponding transducer elastic element retainer, and the other end of each transducer elastic element is fixedly connected to an transmission arm of the transducer bracket coupling elastic element; wherein a cleaning device having a natural vibration frequency f.sub.natural is constituted utilizing the bending strain of an elastic material, such that the natural frequency f.sub.natural of the cleaning device is in the range of 100 Hz to 400 Hz, and the relationship between the natural frequency f.sub.natural and the frequency f.sub.0 of the electromagnetic force produced by the drive coil in the handle satisfies: 0.85f.sub.0<f.sub.natural<1.05f.sub.0. The present cleaning device has a compact structure and an aesthetically pleasing shape, rotates steadily, and produces little noise.

Provided is a cleaning device for personal cleaning and care, comprising a cleaning device housing detachably connected to a handle housing, a bracket for supporting the cleaning device, a cleaning element carrier and cleaning elements distributed on the cleaning element carrier, a passive assembly, and a cleaning device transducer. The cleaning device transducer comprises at least two transducer elastic elements; one end of each transducer elastic element is fixedly connected to a corresponding transducer elastic element retainer, and the other end of each transducer elastic element is fixedly connected to an transmission arm of the transducer bracket coupling elastic element; wherein a cleaning device having a natural vibration frequency f.sub.natural is constituted utilizing the bending strain of an elastic material, such that the natural frequency f.sub.natural of the cleaning device is in the range of 100 Hz to 400 Hz, and the relationship between the natural frequency f.sub.natural and the frequency f.sub.0 of the electromagnetic force produced by the drive coil in the handle satisfies: 0.85f.sub.0<f.sub.natural<1.05f.sub.0. The present cleaning device has a compact structure and an aesthetically pleasing shape, rotates steadily, and produces little noise.

An electrical appliance for personal care includes a handle with a longitudinal axis, and a plug-on part which can be attached to the handle, wherein a vibration unit having an electric motor and an eccentric element is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle, which plug-like coupling structure forms an interface with a substantially mirror-inverted socket-like coupling structure of the plug-on part, wherein the interface has at least two stages with different circumferential geometry, wherein at least one of the stages has a rotation-preventing means between the handle and the plug-on part, and wherein a stop surface of the handle for the plug-on part extends obliquely with respect to the longitudinal axis of the handle.

An electrical appliance for personal care includes a handle with a longitudinal axis, and a plug-on part which can be attached to the handle, wherein a vibration unit having an electric motor and an eccentric element is arranged in the handle, wherein a plug-like coupling structure protrudes from the handle, which plug-like coupling structure forms an interface with a substantially mirror-inverted socket-like coupling structure of the plug-on part, wherein the interface has at least two stages with different circumferential geometry, wherein at least one of the stages has a rotation-preventing means between the handle and the plug-on part, and wherein a stop surface of the handle for the plug-on part extends obliquely with respect to the longitudinal axis of the handle.