A conduit guide includes a main body having a first portion and a second portion, the first portion being configured for attachment to a dental delivery unit, the main body defining a channel along at least a portion of its length configured to receive a utility conduit. A positioning assembly is disposed within the main body, and includes a first attachment member, a second attachment member, a biasing member, and an adjustment member. The biasing member is coupled to the first attachment member and to the second attachment member, and extends between the first attachment member and the second attachment member. The adjustment member is coupled to the biasing member and configured to axially move the biasing member to adjust a position of the conduit guide. The conduit guide is configured such that at least the adjustment member of the positioning assembly can be selectively accessed and enclosed within the main body.

An oral irrigator including a reservoir, a handle, a housing, a bezel positioned at least partially within and secured to the housing, and an actuator operably coupled to the housing and movable relative thereto is disclosed. The actuator includes a control shaft extending from the interior surface of the face and positioned inwards from an outer perimeter of front wall. The control shaft extends through an aperture in the housing and movement of a gripping body causes the control shaft to directly actuate a switch or a pressure assembly positioned within the housing. The actuator also includes an augmentation fluid positioned between the bezel and a portion of the actuator. The augmentation fluid modifies a frictional relationship between the bezel and the actuator to provide a predefined resistance force between the actuator and the bezel as the actuator is rotated relative to the bezel.

A pump assembly for a dental cleaning appliance includes a positive displacement pump including a fluid chamber and a fluid displacement member which is moveable in a linear direction relative to the fluid chamber, and a drive for actuating the pump to draw fluid into the fluid chamber through a fluid inlet. An energy storage device converts kinetic energy generated during actuation of the pump by the drive into potential energy, and stores the potential energy. A cam is connected to the drive for rotation relative to the fluid displacement member. The cam has a ramp extending about the fluid displacement member which is engaged by a cam follower connected to the fluid displacement member. As the cam moves relative to the fluid displacement member, the cam follower moves along the ramp to actuate the pump to draw fluid into the fluid chamber, and beyond the end of the ramp to enable the energy storage device to use the stored potential energy to actuate the pump to urge fluid from the fluid chamber.

A waterproof oral irrigator including an oral irrigator housing which is provided with a sliding recess on an outer wall thereof; a push switch slidably fitted with the sliding recess and provided with a magnetic element; and a control circuit board arranged inside the oral irrigator housing and being provided with a plurality of Hall elements. A plurality of Hall elements are sequentially disposed at intervals along a sliding direction of a push switch. When the push switch slides along the sliding recess, the magnetic element can be driven to move to positions sensed by the plurality of Hall elements in sequence. Since the outer wall of the oral irrigator housing is provided with the sliding recess, and the sliding recess is not communicated with the interior of the oral irrigator, so that the waterproof performance of the oral irrigator can be greatly improved.

A method of determining an aperture area of a nozzle hole in a droplet jet device including a flow channel through which a liquid flows and the nozzle hole configured to spray the liquid, the method including determining the aperture area [m.sup.2] of the nozzle hole so that a jet flow of the liquid sprayed from the nozzle hole is fragmented into droplets, the liquid having a value of ρ.sup.0.45/σ determined from a density [kg/m.sup.3] of the liquid and a surface tension [N/m] of the liquid in a range no lower than 300 and no higher than 900, and a kinematic viscosity coefficient [m.sup.2/s] of the liquid in a range no lower than 1.0E-6 and no higher than 2.0E-5.

An oral cavity care method uses a fine ozone bubble liquid, wherein a stock solution of the fine ozone bubble liquid has ozone gas concentration of 100 ppm or more, even if ozone gas concentration of the fine ozone bubble liquid is diluted to 4 ppm or less, the fine ozone bubble liquid has a sterilizing action, the fine ozone bubble liquid has ozone gas concentration of 4 ppm or more after frozen storage for one year or more, and in addition to the sterilizing action, the fine ozone bubble liquid has an odor component decomposition action and an antiviral action.

An oral cavity care method uses a fine ozone bubble liquid, wherein a stock solution of the fine ozone bubble liquid has ozone gas concentration of 100 ppm or more, even if ozone gas concentration of the fine ozone bubble liquid is diluted to 4 ppm or less, the fine ozone bubble liquid has a sterilizing action, the fine ozone bubble liquid has ozone gas concentration of 4 ppm or more after frozen storage for one year or more, and in addition to the sterilizing action, the fine ozone bubble liquid has an odor component decomposition action and an antiviral action.

A valve piston pump body device of water flosser includes a front bracket shell equipped with a back bracket shell. A pump body is installed at the middle-upper end of the cavity between the front bracket shell and the back bracket shell. A motor is installed at the middle-lower end of the cavity between the front bracket shell and the back bracket shell. The rotating shaft at the upper end of the motor is equipped with motor teeth. A first metal shaft is arranged in the hole of the cavity between the front bracket shell and the back bracket shell. A driving gear is installed on the first metal shaft and the driving gear and the motor teeth are mutually engaged. A one-way valve piston device is used.

The invention relates to a device (1) for treating objects, in particular dental prosthetics and/or teeth, comprising a receiving volume (3) for receiving a cleaning fluid (5), a plasma source (7) configured to generate a non-thermal plasma (35), wherein the device (1) is configured for mixing a plasma product with the cleaning fluid (5), whereby an activated cleaning fluid can be generated, and wherein the device (1) is configured for using the activated cleaning fluid on an object, in particular on at least one dental prosthesis and/or at least one tooth.

The invention relates to a device (1) for treating objects, in particular dental prosthetics and/or teeth, comprising a receiving volume (3) for receiving a cleaning fluid (5), a plasma source (7) configured to generate a non-thermal plasma (35), wherein the device (1) is configured for mixing a plasma product with the cleaning fluid (5), whereby an activated cleaning fluid can be generated, and wherein the device (1) is configured for using the activated cleaning fluid on an object, in particular on at least one dental prosthesis and/or at least one tooth.