A pump structure of a portable oral irrigator, the oral irrigator main engine comprises a housing and a pump assembly; the pump assembly is disposed within the housing and is provided with a pump body, a driving motor, a water outlet provided corresponding to the water outlet nozzle, and a water inlet provided corresponding to the water inlet nozzle are disposed on the housing; an output shaft of the driving motor is drivingly connected to the pump body by means of a spur gear and a contrate gear; the pumping piston head is disposed in one end of the pump cylinder, and the other two ends of the pump cylinder are communicated with the water outlet nozzle and the water inlet nozzle; one end of the piston rod is connected with the pumping piston head; and the other end of the piston rod eccentrically and rotationally cooperates with the contrate gear.

A dental plaque cleanser is a dental clinic device for cleansing dental supragingival and subgingival plaque biofilm as well as scaling calculus. The dental plaque cleanser comprises a water jet biofilm cleansing unit and an ultrasonic scaling unit.

An oral cavity washing device includes a nozzle and a pump that supplies a liquid to the nozzle. The nozzle has a nozzle flow passage and a reduced part that is disposed in an intermediate part of the nozzle flow passage and that is smaller in cross-sectional area than a rest of the nozzle flow passage. A first flow passage and a second flow passage that are in parallel to each other are disposed between the nozzle and the pump. The first flow passage has a first valve that causes the first flow passage to be opened only when the pump sucks the liquid. The second flow passage has a second valve that causes the second flow passage to be opened only during discharge performed by the pump.

Present invention teaches a portable teeth-cleaning device where a flexible water tank is stored inside the main body of the device; when water is being sent into the flexible water tank, getting it ready for use, the tank will expand in volume and come out of the main body. A pump is used to perform the water intake function and the water squirt-out function, via guide channels, with controlling means to control the mechanism of either 3 valves or 2 switch valves to effectuate the intended functions.

Disclosed is a portable teeth cleaning apparatus, which implements, through a pump in a teeth cleaner, a function of supplementing a teeth cleaning liquid from a connecting seat connected to the teeth cleaner. Therefore, it is no longer necessary to connect the teeth cleaner to a teeth cleaning liquid source through a connecting hose during teeth cleaning, and liquid leakage is avoided during liquid supplement. Further, a seating/unseating status and whether a liquid reservoir is filled up are detected automatically, and a controller controls on/off and switching of a series of valves, thereby implementing automatic liquid supplement of the teeth cleaner.

Disclosed is a teeth cleaning apparatus, including a first liquid reservoir, a teeth cleaner, a connector, and a liquid conveyer. The teeth cleaner includes a teeth cleaner body and a second liquid reservoir that is fixedly connected to the teeth cleaner body and transmits a teeth cleaning liquid to the teeth cleaner body during teeth cleaning. The connector is separable from the teeth cleaner, and the liquid conveyer transmits the teeth cleaning liquid in the first liquid reservoir to the second liquid reservoir when the teeth cleaner is connected on the connector.

A dental water jet is provided. The dental water jet may include a base unit, a reservoir supported by the base unit, a handle supported by the base unit, and a container covering an opening of the reservoir. The container may include a base supported by the reservoir and a lid movable relative to the base. The container may be configured to store one or more tips for use with the handle.

A handle of an oral irrigator is provided. The handle may include a handle housing with a first segment and a second segment configured to couple together and define a cavity there between, a first set of interior walls extending from the first segment, and a second set of interior walls extending from the second segment. A wall of the first set of interior walls and a wall of the second set of interior walls may limit movement of an oral irrigator component at least partially disposed in the cavity.

A dental apparatus and method, for example an endodontic apparatus and method, is disclosed. The apparatus includes: a supply of fluid; a pump for delivering fluid from the supply under pressure and a handpiece in fluid communication with the pump. The handpiece includes a needle 30, extending from a rearward end proximal to the handpiece to a forward tip distal from the handpiece, a lumen of the needle extending to an opening at the tip to deliver fluid received from the pump to a tooth. The dimensions of the needle and the delivery pressure of the fluid are selected such that the flow of fluid through the needle causes a cloud of inertial cavitation to be formed forward of the needle tip.

An oral irrigator has a first liquid container, a nozzle outlet, a pump driven by a drive to pump liquid from the liquid container to the nozzle outlet so that a liquid jet is emitted via the nozzle outlet, a first switch arranged so that the drive is powered when the first switch is actuated once and the oral irrigator is switched into an ON state, and so that powering of the drive is stopped and the oral irrigator is switched into an OFF state when the first switch is actuated once again, and a second switch arranged so that the drive is powered only while the second switch is continuously actuated by the user and powering is stopped when the second switch is released.