A biodegradable replaceable toothbrush head preferably for an electric toothbrush. The replacement head can be configured to be removably connected and operated by one or more conventional electric power/drive units. Various biodegradable materials can be used alone or in combination for constructing the replacement head and in certain embodiments the biodegradable replacement can be constructed from solely or primarily corn starch or bamboo. In another non-limiting embodiment, the biodegradable replacement head can be construction from about 60-80% polylactic acid, and about 20-40% talcum.

Provided are a brush head assembly and an electric toothbrush. The brush head assembly comprises a brush head body, a linking component and a locking cylinder; wherein a component assembly cavity is arranged at the tail end of the brush head body, the linking component is installed in the component assembly cavity, and a deformable locking cylinder including a fulcrum force-receiving part and a force applying part with elastic forces at both ends is embedded; the locking cylinder makes most of the strokes of the drive shaft in the insertion process smooth and convenient, only until the two force applying parts are both in contact with the drive shaft, will force be generated to lock the drive shaft, and the locking effect achieved by this elastic force can be maintained for a long time. Thus ensuring the capabilities of torque transmission and axial retention.

A drive mechanism for electric toothbrush includes a grip housing and a pivot housing mounted within the grip housing. The pivot housing has a fixed portion, a movable portion with a free end spaced from the fixed portion, and bridge that connects the fixed and movable portions and defines a fulcrum. A motor is mounted within the pivot housing, and an eccentric weight extends from the motor with the motor operable to rotate the eccentric weight. A brush shaft is attached to the pivot housing opposite the free end. A power source is adapted to activate the motor and rotate the eccentric weight, such that the free end of the pivot housing is driven to move by the movement of the eccentric weight, the pivot housing pivots at the fulcrum, and the brush end of the brush shaft oscillates about the fulcrum.

The utility model discloses a U-shaped electric toothbrush. The U-shaped electric toothbrush includes a handle and a U-shaped brush head. The U-shaped brush head includes an inner brush piece and an outer brush piece separated from each other. Bristles are provided on opposite surfaces of the inner brush piece and the outer brush piece. A driving device configured to drive the inner brush piece and the outer brush piece to move in a reciprocating and alternating manner is provided on the handle. The driving device includes a motor, a connecting rod, a connecting sleeve sheathed on the connecting rod, and a gear set. The motor drives, through the gear set, the connecting rod and the connecting sleeve to move in a reciprocating and alternating manner in a radial direction of the connecting rod. The outer brush piece is connected to an upper end of the connecting sleeve and is drivable to move by the connecting sleeve. An upper end of the connecting rod passes through the connecting sleeve and protrudes upward. The inner brush piece is connected to the upper end of the connecting rod and is drivable to move by the connecting rod. According to the utility model, the inner brush piece and the outer brush piece are drivable to move in a reciprocating and alternating manner in upward and downward directions in an oral cavity to clean teeth with the bristles. Therefore, the amplitude of motion of the bristles is increased, cleaning efficiency is improved, and the time spent by a user on tooth brushing is shortened.

Oral hygiene devices, systems, and methods are disclosed herein. In some embodiments, the device comprises a disposable shaft configured to be releasably coupled to a reusable base. The shaft may include a head configured to engage an oral tissue and oral contents of a patient's oral cavity to dislodge one or more substances disposed on the oral tissue. In some embodiments, the shaft defines one or more lumens configured to transport a substance between the base of the device and the patient's oral cavity. The device can be configured to deliver a therapeutic agent to the patient's oral cavity to prevent and/or inhibit colonization of the oral cavity by pathogens. In particular embodiments, the device is configured to suction a substance out of the oral cavity and into the device to reduce a risk of the substance being aspirated into the patient's airways.

An oral care method using an electric toothbrush includes receiving brushing data from an electric toothbrush, by an application; and analyzing the brushing data by the application to display a brushing score indicating how much the brushing is performed.

A device and method for treating periodontal pockets following a dental procedure for treating periodontal pockets in a patient includes a vibrational dental device having a mouthpiece for contacting the dentition. Instructions are provided for using the vibrational dental device by placing the mouthpiece over the dentition, applying a vibratory force during a predetermined number of sessions throughout a predetermined treatment period, wherein the recovery of the periodontal pockets is enhanced and/or accelerated compared to without vibratory treatment.

A vibration structure of electrical toothbrush includes a shaft rod, a rocking rod, a fixing member and a vibration stem. The shaft rod has a first end and a second end. A driving power is applied to the first end to drive and vibrate the shaft rod. One end of the rocking rod is correspondingly inserted in the second end of the shaft rod. A weight block is disposed at the other end of the rocking rod. The weight block is eccentrically arranged to cause unbalance of the rocking rod to deflect from a central axis of the shaft rod. The fixing member is fitted on the rocking rod between the shaft rod and the weight block. The vibration stem is formed with an internal first space. The shaft rod is correspondingly disposed in the first space with the fixing member in contact with inner side of the vibration stem.

Provided is a connecting structure for connecting a head assembly and a handle portion of a vibration cleaning appliance, the handle portion includes a handle housing with a hollow portion and a vibration shaft, the head assembly includes a brush handle housing with a handle interface, a blind hole is provided in the middle of the interface, the rear end of the shaft is tightly inserted into the hole; a buckle cavity is provided on the interface, the front end surface of the cavity is a buckle locking surface of the interface; a buckle combination part including a cantilever and a protrusion is provided in the housing along its rear end, the cantilever is formed in and separated from the housing, the rear end of the cantilever is provided with the protrusion, a locking surface of the combination part is provided on the protrusion accommodated by the cavity of the interface.

A dual-purpose electric toothbrush head is provided and includes a toothbrush handle and a toothbrush head. The toothbrush head includes toothbrush bristles, and a nozzle and a water trough are disposed in the toothbrush head. The nozzle is connected to the water trough, and the toothbrush handle has a water inlet chamber. A water inlet hole is provided between the water inlet chamber and the water trough. A tail plug is provided on a toothbrush head tail end. The dual-purpose electric toothbrush head can not only clean teeth, but also rinse diastema and oral cavity to ensure oral hygiene. The dual-purpose electric toothbrush has diverse functions, and is stable and convenient to use, safe and reliable.