Embodiments disclose a disposable protective assembly apparatus for a dental syringe body of a dental syringe. The apparatus is a combination of a disposable syringe tip and a disposable protective sleeve, the sleeve being pre-attached to the syringe tip, and the sleeve being in a pre-folded position to be quickly and easily slid over the dental syringe prior to a dental operation.

Disclosed herein is a device for administering a liquid therapeutic substance to tissue, including a housing having a liquid inlet port a gas inlet port connected to a pressurized gas source; at least one therapeutic substance supply assembly mounted onto said housing, each therapeutic substance supply assembly including at least one syringe dispenser connector configured for receiving a syringe dispenser containing a predefined quantity or concentration of the liquid therapeutic substance, each syringe dispenser in fluid flow communication with one of at least one valve projecting from and external to said assembly, said syringe dispenser includes a container configured to store the liquid therapeutic substance and a piston configured to be pulled into the container as the liquid therapeutic substance is removed from said container under suction so as to flow through said at least one valve.

The invention discloses a water toothpick, which includes a high-pressure gas generator, a water tank, a valve, a nozzle assembly and a water supply, wherein the high-pressure gas generator is communicated with the nozzle assembly, the valve is arranged between the high-pressure gas generator and the nozzle assembly, and the water supply is respectively communicated with the water tank and the nozzle assembly, so as to convey water in the water tank to the nozzle assembly. When the water toothpick is used, the high-pressure gas generator transmits generated high-pressure gas to the valve, the water supply transmits the water in the water tank to the nozzle assembly, and after a certain amount of water is stored in the nozzle assembly, the valve is opened, and the high-pressure gas at the valve is instantaneously discharged into the nozzle assembly, mixed with the water in the nozzle assembly to form compressed vapor, and then sprayed out from the nozzle assembly to complete one cleaning action.

A dental syringe tip system for attachment to a dental syringe. The dental syringe tip system can include components such as an outer core, an inner core, and a carrier which can be combined in a multitude of combinations to achieve different fluid flow characteristics, such as discharge pressure and discharge pattern, through the dental syringe tip. The outer core and inner core can have passages designed to modify fluid flow characteristics. In addition, the outer core and inner core can have additional connectors for receiving fluids from sources other than a dental syringe. Some or all of the components can be separate to be assembled by a manufacturer or an end-user. Assembly of multiple components can be facilitated by retention features located on the components.

Process water supply unit for supplying a medical treatment unit with process water (BW), containing biocide, comprising: a container receptacle for receiving a pressurised water container; a compressed air inlet for connecting the process water supply unit to a compressed-air source; a compressed-air connection, via which compressed air (DL) originating from the compressed-air inlet can be introduced into the pressurised water container; and a process water connection, via which the process water (BW) which is to be delivered out from the pressurised water container by the compressed air (DL) introduced into the pressurised water container can be dispensed to the medical treatment unit, wherein the process water supply unit has a sterile air filter which is integrated into a compressed-air path between the compressed-air inlet and the compressed-air connection or into a compressed-air path between the external compressed-air source and the compressed-air connection.

Embodiments disclose a disposable protective assembly apparatus for a dental syringe body of a dental syringe. The apparatus is a combination of a disposable syringe tip and a disposable protective sleeve, the sleeve being pre-attached to the syringe tip, and the sleeve being in a pre-folded position to be quickly and easily slid over the dental syringe prior to a dental operation.

A subgingival cleaning system (10) for cleaning a subgingival region such as a periodontal pocket is disclosed. The system comprises a liquid flow source (60) for producing a liquid flow and a gas flow source (70) for producing a gas flow. Each of the liquid flow source and the gas flow source are coupled to a nozzle arrangement (40) arranged to be aimed at a subgingival region to be cleaned, the nozzle arrangement comprising at least one nozzle (41, 42, 43). The system is configured to produce a fluid stream comprising a series of liquid pulses from said liquid flow source, said liquid pulses each having a duration of 5-100 ms, preferably 8-40 ms, with an interval of 1-50 ms, preferably 2-10 ms, between subsequent liquid pulses; and a gas flow from said gas flow source at least partially filling said intervals. Also disclosed is a nozzle arrangement for forming such a subgingival cleaning system.

An oral care device (10) with a pump assembly (12) including: a plunger assembly (52) having a rack assembly (74); a compressible spring (64) configured to exert a forward force on the plunger assembly; and a rack and pinion assembly (72) configured to exert a force on the plunger assembly opposite the forward force, wherein the rack assembly includes a plurality of rack teeth (74 a . . . 74 g) and the pinion assembly (76) includes a plurality of teeth (78) arranged around a portion of the pinion; where the plurality of rack teeth include an angled front surface (86) and an angled rear surface (87), the front surface of at least some of the plurality of rack teeth including a different angle than the rear surface, and further where at least some of the plurality of rack teeth include a pointed or rounded tip (82).

A oral irrigator device (10) for cleaning teeth, including a system (14) for producing a stream of liquid/air bursts and a nozzle (16) connected to the system, and through which the stream of liquid/air bursts are directed. The nozzle can include a guidance tip (26) including a base portion (30), a tip portion (28), and an orifice (31) through which the stream of liquid/air bursts exits at a flow output pattern, and a flow output pattern selection mechanism (90, 90) connected to or positioned within the guidance tip. A flow output pattern selection mechanism can be configured to be selectively actuated and to vary, upon the actuation the flow output pattern between a first flow output pattern to at least a second flow output pattern.

A stable water flosser includes a body and a head. A nozzle is provided at the head. A liquid and air storage chamber that is communicated to the nozzle is provided inside the head, and a diameter of the liquid and air storage chamber is larger than that of the nozzle. The water flosser has a compact structure and is capable of effectively avoiding the pressure reduction of the air and the liquid.