Abstract: The oral care appliance comprises: a fluid pump (46); a source of liquid (50); and a source of gas (12); wherein the pump is in operative communication with the sources of liquid and gas to produce a series of gas-injected fluid pulses and/or a jet fluid flow using liquid slugs in a selected sequence directed to a nozzle and from there to the teeth, and a control assembly for selecting pulse flow or slug flow with specific set times and sequence directed to a nozzle assembly (80) and from there to the teeth; wherein the pulses have a pulse width within the range of 0.001-0.5 seconds, a pulse height from 0.1-10 Newtons, a rise/fall time range of 0.5-250 ms, a repetition rate in the range of 2 Hz to 20 Hz, and wherein the gas/liquid mixture range from 40-95% volume to volume gas to liquid, or wherein the fluid slugs in the jet flow have a volume in the range of 0.05-0.5 ml per orifice, a diameter in the range of 0.1-2 mm and a repetition rate within the range of 2 Hz to 20 Hz.

Abstract: An oral care appliance using a jet-type fluid flow And mechanical action An oral care appliance comprises: a gas-liquid cleaning assembly which includes a fluid flow pump assembly (46); a source of liquid (50); and a source of gas (12). The pump assembly is in operative communication with the sources of fluid and gas to produce a jet pattern of gas-injected fluid slugs, directed to a nozzle assembly (80) from which the resulting slugs are directed to the teeth, wherein the individual fluid slugs in the jet flow have a volume in the range of 0.05-0.5 ml per orifice, a diameter in the range of 0.1-2 mm and a repetition rate within the range of 2 Hz to 20 Hz.

Abstract: A prophy angle is provided that includes a paste-dispensing assembly that includes an actuator at the proximal end of the housing, and a push rod linked to the actuator and supporting a plunger on the push rod, where the push rod is supported by the housing in a biased manner to permit longitudinal movement within the housing in a reciprocating manner as actuated by the actuator, to dispense a controlled quantity of paste out of the prophy angle.

Abstract: An irrigator handle to be used with a water jet apparatus for cleaning gums and teeth includes a visual indicator to let a user know when a tip has been properly attached to the handle. The handle in some embodiments also includes an audible indicator to let the user know when the tip has been properly attached. The handle has a pause button attached to plunger to restrict water flow when the pause button is depressed.

Abstract: Medical treatment devices, such as dental treatment devices, include at least a drive unit for driving a tool configured to act on a treatment site, a light-emitting device and a cooling media dispensing device for dispensing at least one cooling medium onto a tool and/or a treatment site. The device can be controlled, such as with a controller, to substantially alternatingly operate the light-emitting device and the dispensing device, thereby intermittently illuminating the tool and/or the treatment site and dispensing cooling medium toward the tool and/or the treatment site, respectively, which provides a user with an improved view of the tool, the treatment site, or both.

Abstract: An application substance reservoir for a toothbrush is provided. The reservoir has a data carrier and may be filled with toothpaste or another application substance. An electric toothbrush is also provided. The data carrier of the application substance reservoir may contain, for example, information regarding the prevailing filling level of the application substance reservoir and the type of application substance. The electric toothbrush has a data receiver for reading the data stored in the data carrier, a data transmitter for writing to the data carrier, and a control unit which may display the filling level in the application substance reservoir or the particular application substance used.

Abstract: The interface structure includes a handle portion (12) having separate supply lines for gas and liquid, and a head portion (18) also having separate supply lines for gas and liquid, wherein the upper surface of the handle portion is configured relative to the lower surface of the head portion, with or without a separate locking member, that the gas and liquid lines in the handle connect in a fluid-sealing relationship with the gas and liquid lines in the head as the head portion is operatively positioned on the handle portion.

Abstract: The present invention is an oral irrigator comprising a pump, a discharge nozzle and a pressure control. The pump has a generally constant operating speed and feeds the discharge nozzle. The pressure control is adapted to modify a discharge pressure at the nozzle without a significant change in pump speed. The pressure control modifies a level of fluid flow restriction between the pump and the nozzle. The modification of the level of fluid flow restriction is accomplished by modifying aspects of a fluid flow path extending through the pressure control. The aspects modified include the diameter, length and/or number of direction changes of the fluid flow path.

Abstract: The interface structure includes a handle portion (12) having separate supply lines for gas and liquid, and a head portion (18) also having separate supply lines for gas and liquid, wherein the upper surface of the handle portion is configured relative to the lower surface of the head portion, with or without a separate locking member, that the gas and liquid lines in the handle connect in a fluid-sealing relationship with the gas and liquid lines in the head as the head portion is operatively positioned on the handle portion.

Abstract: A dentifrice dispensing electrical toothbrush using a replaceable dual-channel brush head. The dual-channel brush head has a first channel for housing a drive shaft for bristle oscillation and a second channel for dispensing the dentifrice material. The brush head is mounted on the dual-channel connector of the brush handle which contains a drive mechanism and a pumping mechanism that dispenses dentifrice material from a cartridge in the handle. A manual dispensing configuration uses an external rubber button and an electrical dispensing configuration uses a rotary solenoid for actuating an internal rubber button that applies pumping pressure to the dentifrice material. The latter benefits arthritis sufferers, as no external squeezing action is required.

Abstract: A medical syringe contains neoprene O-rings and is constructed such that its nozzle and handle can be sterilized without damaging the O-rings. A hollow aluminum handle provides a first handle opening at the bottom and a second handle opening at the top. An insert is removably inserted through the second handle opening to locate the insert at the top of the aluminum handle. An elongated metal or plastic valve body is removably inserted into the first handle opening to locate a top end of the valve body and two normally closed valves adjacent to the insert, and to locate a bottom end of the valve body at the first handle opening. The bottom end of the valve body is hose-connected to an air and a water pressurized source. Each valve includes a valve seat and a valve O-ring that is spring-biased against the valve seat. Two valve actuators in the insert selectively open the two valves by moving the valve O-rings away from the valve seats.

Abstract: The present invention provides a portable dental system for use in areas having inadequate sources of power, either for human or for veterinary dentistry. The system provides one or more handpieces, each driven driven by a pressurized nitrogen gas contained in a portable tank. A water reservoir is also provided for medicated water to be applied to the tooth site. The system has two channels to which either a conventional dental handpiece or an abrasive handpiece can be attached. When two abrasive handpieces are attached, two different abrasive materials may be used by the system, one material for cleaning and one material for cutting or abrading.

Abstract: Dental instrument, with a handpiece (15) housing a driven tool (5), which handpiece is rotatably connected to a supply device (28) by a tube (14) containing lines.

Abstract: An optical conduit is bundled with one or more fluid carrying conduits such that the bundled conduits are axially aligned near their distal ends. Light and fluid emitted from orifices at the terminal ends of the conduits are emitted along substantially coaxial paths. A ferrule is preferably used to bundle the conduits together at the distal ends of the conduits, and elsewhere along their combined lengths if desired. The fluid conduit may comprise an outer tube and a smaller coaxial inner tube, one tube for delivering a first fluid and the other tube for delivering a second fluid. The optical conduit comprises optical fibers for delivering light through the end of the bundle. Because the conduits are bundled near the distal ends of the aligned tubes, the light and fluid delivered through the conduits are precisely aimed at the intended point.

Abstract: A dental syringe assembly has a handpiece connected to air and water lines and a tip for directing air and water flow into a patient's mouth. The tip has an enlarged cap that is detachably engageable with a sleeve structure of a head member of the handpiece. The sleeve structure may be provided in a connection piece that fits within a socket in the head member so that the connection piece can rotate but is retained against removal. A non-return valve may be provided within the head member to prevent return flow of contaminated water.

Abstract: Water treatment methods and systems using laser light. Water enters a treatment area from waterline tubing wherein water within the treatment area is subjected to light from a laser as it passes through the treatment area, and wherein microorganisms contained within said water are reactive to the light and are killed. The water is provided to a point of use after treatment by light. The treatment area may be a junction box having an entry point for receiving water from input tubing connected to the input portion of the junction box; a fiber optic line or laser source coupled to the junction box for delivery of light from a laser into the junction box; and an exit point and/or port for providing water passing through the junction box to a point of use.

Abstract: A dental syringe tip for use with a hand-piece of an air-water syringe to deliver air and water to a mouth of patient. The syringe has air and water conduits for delivering air and water to a discharge end of the hand-piece. The dental syringe tip includes a single unitary tube releasably engageable with the discharge end of the hand-piece. The tube has a fluid passageway extending from an intake port at an intake end of the tube for fluid communication with the air and water conduits of the hand-piece. In addition, the tube has a discharge port at a discharge end of the tube for delivering at least one of the air and water through the passageway to the mouth of the patient. The intake end of the tube is shaped and constructed to enable air and water flow through the air and water conduits when at least a portion of the intake end of the tube engages the discharge end of the hand-piece.

Abstract: A dental syringe is disclosed wherein finger actuated shutoff valves control air and water flows to a discharge nozzle. The shutoff valves are constructed with a groove into which the media inlet barb is inserted for retention. All O-rings are retained below the surface of the syringe head. The discharge nozzle is constructed with a retaining groove and retained with a snap ring.

Abstract: A periodontal pocket cleaning device is provided which has a very excellent effect for the prevention of periodontal diseases, which is least liable to cause injury to the periodontal pocket, which can be used at any place without limiting the place of its use, which is able to obtain a stabilized atomized jet without being influenced by the height position of the handy probe, and which is available at a low cost. The periodontal cleaning device includes a handy probe provided with an air-jet ejection mechanism, an air pump for producing compressed air, and an air-feeding tube for feeding the compressed air from the air pump to the handy probe. The handy probe is provided with a liquid storage tank for storing liquid agent such as water or liquid chemicals therein. The jet-out pressure of the compressed air to be ejected from the nozzle of the handy probe is set in a range of from 0.05 to 0.08 kg/cm.sup.2. The jet-out quanity of the compressed air is set in a range of from 2 to 30 l/min.

Abstract: The improvement of a dental syringe includes the addition of a fluid control block. The fluid control block includes a barrel portion having a first connector for attachment to a syringe handle and a second connector for attachment to a delivery nozzle. The barrel portion defines an air flow passage and a separate water flow passage. A dial is rotatably mounted to the barrel portion and defines a plurality of differently sized flow orifices alignable one-at-a-time with one of the flow passages. Each of the flow orifices allows a predetermined level of fluid flow through the flow passage when aligned with the flow passage. The improved dental syringe can be employed to assess abfraction forces acting upon teeth, to assess the success or failure of an occlusal adjustment procedure, and to reduce splatter.

Abstract: A sterile fluid delivery system that incorporates a specialized handpiece adapter placed between a standard dental or other medical handpiece and a conventional tube set. The tap water conduit in the conventional tube set is blocked by the handpiece adapter and instead a tube set connected to the adapter provides a supply of sterile fluid for delivery to a work site. A peristaltic pump delivers fluid from a sterile supply to the handpiece adapter. Motor exhaust air pressure from the adapter is applied to the pump to activate a pressure-sensitive switch. The pump automatically turns on when the medical tool is activated and turns off when the tool is deactivated.

Abstract: A new apparatus and method for delivering sterile irrigating solution to dental sites during restorative and surgical procedures is disclosed. A new sterilizable handpiece line adapter is connected between prior art dental handpieces and dental unit air-water hoses. The handpiece line adapter includes an input port for sterile irrigating solution and an outlet port for the sterile irrigating solution replacing a prior art outlet port for tap water. A standard IV bag containing sterile irrigating solution is pressurized with a standard infuser bag. Standard IV tubing connects the IV bag to the input port of the line adapter. An air-controlled, normally-closed pinch valve girdles part of the IV tubing. The pinch valve is connected to a spare outlet of a standard foot pedal controlled dental unit so that, when the foot pedal is depressed to operate the dental handpiece, the pinch valve automatically opens to allow delivery of sterile irrigating solution from the IV bag.

Abstract: A dental cleaning device (1) is provided with a mouthpiece (6) and with a grip member (4) having a fluid channel (83, 76, 75, 67, 69, 70, 71, 93, 94) and having a fluid-flow control device (61) which is adjustable an actuating member (8), which is movable between different actuating positions to change the amount of fluid supplied to the mouthpiece (6) through the fluid channel (83, 76, 75, 67, 69, 70, 71, 93, 94), the grip member (4) is provided with activatable parts (83, 76, 75, 67, 72, 73, 74, 32, 94) for temporarily increasing the amount of fluid supplied to the mouthpiece (6) while the instantaneous actuating position of the actuating member (8) for the fluid-flow control device (61) is maintained.

Abstract: The device presented herein is a Disposable Adjustable Flow Prophy Angle (DAFPA) attachment with an integral feed mechanism to expel a predetermined quantity of abrasive medium into a polish cup. During use, the high speed rotation of the drive shaft driving the angled attachment will propel the abrasive medium into the flow channel, via a propellant screw. A sealing ring is incorporated to protect against any backflow of the abrasive medium. A significant feature of the device is the ability to continually adjust the flow of abrasive medium deposited into the polish cup by a calibrated flow adjustment knob, providing the advantage of selecting a predetermined flow rate, to accommodate the needs of the health care professional. The current procedure is more time consuming and less sanitary. In the proposed system the abrasive medium is fed continuously or on demand from an internal reservoir. The invention would apply to both disposable and metallic right angle units.

Abstract: A dental syringe for delivering three discrete fluids, such as water, medicine, and air. The syringe includes a housing having a plurality of fluid intake passageways and an exhaust passageway, and wherein the fluid intake passageways are connected in fluid flowing relation relative to the exhaust passageway, and a plurality of selectively controllable valves are borne by the housing and operable to meter fluid flow from the individual intake passageways.

Abstract: The improvement of a dental syringe includes the addition of a fluid control block. The fluid control block includes a barrel portion having a first connector for attachment to a syringe handle and a second connector for attachment to a delivery nozzle. The barrel portion defines a flow passage. A dial is rotatably mounted to the barrel portion and defines a plurality of differently sized flow orifices alignable one-at-a-time with the flow passage. Each of the flow orifices allows a predetermined level of fluid flow through the flow passage when aligned with the flow passage. The improved dental syringe can be employed to assess abfraction forces acting upon teeth, to assess the success or failure of an occlusal adjustment procedure, and to reduce splatter.

Abstract: A dental instrument including separable spray and suction mechanisms. The spray mechanism is preferably an air and water syringe of the type conventionally found in a dentist office. The spray mechanism has an elongate nozzle. The suction mechanism includes a tubular structure joined to a valve which is in turn joined to a suction or vacuum source. The tube includes an interior passageway and a forward suction opening into the passageway. The tube also includes a bend and has an aperture at the bend for removeably receiving the spray nozzle. In this manner the spray nozzle can be selectively inserted within the passageway of the suction mechanism. A user is then able to actuate either the spray mechanism and/or the suction mechanism utilizing a single hand that is holding the instrument 1. Alternatively, the mechanism may be removed from the suction mechanism and be utilized as an independent tool.

Abstract: The present invention is directed to an appliance for oral hygiene, in particular an oral irrigating apparatus 10, comprising a hand-held unit 12 and a base unit 14 interconnected by a fluid conducting hose 19 and electrical conductors 21, 23. By means of an operating means 33 arranged on the handle section 28 of the hand-held unit 12, two operating parameters, particularly the On/Off state and the jet pressure of the oral irrigating apparatus 10, can be varied.

Abstract: Various adaptors are used for securing a replaceable syringe tip in operative relationship to a handpiece body. The syringe tip is mounted on a tapered male connector set in the hollow interior of the adaptor. O ring seals and a metal flange member are used to prevent the leakage of air or water passing from the handpiece into the interior of the adaptor and then into the syringe tip. A captivated thumb nut is utilized to prevent the thumb nut from accidently disengaging completely from the adaptor. When the thumb nut is loosened to replace a syringe tip, the thumb nut will remain captivated on the adapter, only loosening enough to allow removal and insertion of a syringe tip.

Abstract: A barrel serves as a reservoir in which a treatment fluid is to be contained and within which barrel is a slideable plunger. A connector at one end of the barrel is receptive to attachment of a cannula. Another connector is located at the other end of the barrel. A housing has a coupling attachable to that other connector. On the housing is a detachable fitting receptive of a hose which delivers air under pressure. Included in the housing is an adjustable air pressure regulator in an air flow path between the detachable fitting and the coupling with the regulator being selectively adjustable to control the flow of the air in that path. Associated with the irrigator is a container for the treatment fluid and which includes a pump sealingly attachable to the one end of the barrel for delivering the fluid into the reservoir in response to movement of the barrel.

Abstract: An apparatus allowing the provision of light and/or water at the tip of a dental illumination light curing device normally provided without such capability includes a pair of supply lines terminating at their remote end in an adapter capable of connection to a standard air/water connection as found on a dental pedestal. The local ends of the supply lines terminate at the neck of the illuminator, where they are supported upon the neck by a clamp, and interconnect with a pair of nozzle tubes. The nozzle tubes have exits at the illuminator tip, and are secured thereto in a removable manner. The modular nature of the apparatus allows removal and exchange of the nozzle elements as desired to accommodate differing illuminator neck shapes and lengths and permit sterilization and replacement of the nozzle elements.

Abstract: A dental syringe is disclosed having a head and attached handle. Finger actuated valves in the head control water and air flows to a syringe tip having concentric conduits. A tip retainer assembly includes a holder having a socket to insertably receive the syringe tip. A lock collar, slidably carried by said holder, has a conical surface which acts on ball elements in the holder to urge them into locking engagement with a grooved, inserted portion of the syringe tip. A spring automatically positions the collar to the locking position with movement of the collar in an opposite direction to a tip unlocking position by fingertip pressure applied to the collar.

Abstract: A dental burr has an axis of rotation and a cooling water passage extending therethrough in coaxial relation to the dental burr. The cooling water passage opens to a front end face of the dental burr, and this opening in the front end of the dental burr is disposed in an area including the axis of rotation of the dental burr. A dental handpiece for rotatably holding a dental burr includes a handgrip portion, a hollow head portion provided at a front end of the handgrip portion, and a cooling water passage. This cooling water passage extends along the handgrip portion,and opens at one end to a rear end of the handgrip portion while the other end thereof is connected to an internal space of the head portion. Part of the internal space serves as a passage for communicating the cooling water passage of the dental handpiece with the cooling water passage of the dental burr held by the dental handpiece.

Abstract: A gas driven medical or dental handpiece assembly of the type having a turbine driven dental tool. A sterile coolant supply is usable with the handpiece to provide liquid fluid under pressure to irriagate the patient site and cool the dental tool. The coolant fluid is derived from a cartridge connected to the handpiece. The cartridge is replaced for each patient. The cartridge is divided by a flexible diaphragm into a propellant chamber and a liquid chamber. Initially the liquid chamber is full and the propellant chamber is empty with virtually a volume of zero. A propellant gas under pressure is introduced into the propellant chamber of the cartridge to displace the diaphragm and move the liquid through a fluid conduit to the tip of the handpiece. The propellant is derived from a portion of the compressed gas used to drive the turbine. Another portion of the compressed gas is diverted to a chip air conduit of the handpiece.

Abstract: A detachable head having therein an air turbine and connecting pipes extending sideways therefrom and a synthetic resin grip provided at its end with a connecting portion having connecting holes into which the connecting pipes of the head are inserted, the dental handpiece having a structure in that a fluid-passage tube formed of a flexible synthetic resin and having a fibrous reinforcing material embedded in its wall is to be connected at its one end with a dental unit body, and passes at least through the synthetic resin grip and is caused to communicate at its other end with the connecting holes in the connecting portion.

Abstract: A device for scaling sordes and tartars on the surface of teeth at the gum pocket having improved construction, in which there are provided a hand-piece for an ejection nozzle; a compressor for feeding pressurized air to the ejection nozzle at one end of the hand-piece; a conduit pipe for transporting the compressed air; a water sump; and a conduit for leading water from the water sump to the ejection nozzle, the compressed air being ejected from the ejecting nozzle of the hand-piece under a pressure of from 1 to 2 kg/cm.sup.2 and in an ejecting quantity of from 6 to 9 l /min., and water being ejected together with the pressurized jet air in an ejecting quantity of from 10 to 30 cc/min. in the form of a spray jet.

Abstract: An air-turbine type dental handpiece in which the handle has separate passages for air and water under pressure respectively to drive the turbine to rotate a bur and furnish cooling water to the bur which has an axial passage entirely therethrough to direct the cooling water where the cutting end of the bur contacts tooth material for producing a dental preparation to receive filling material and the like. The head of the handpiece has a chamber within which the turbine and bearings are mounted and also includes a rotary coupling to direct cooling water to the inner end of the axial passage of said bur and prevent escape of the cooling water to the interior of the chamber for the turbine and bearings. Control mechanism to furnish and regulate the pressure of air and water to the handpiece also comprises part of the invention.

Abstract: A high-speed cutting handpiece and coolant apparatus of the type useable in dental procedures. The handpiece is of the type employing a fluid delivery conduit to provide fluid to the oral cavity of the patient for cooling and irrigating purposes. The coolant apparatus includes a cartridge having an initially empty inlet chamber and an outlet chamber initially filled with sterile solution. The chambers are separated by pressure communicative means. The cartridge is disposed in interrupting relationship to the fluid delivery conduit such that fluid from a source is introduced into the inlet chamber which displaces the sterile solution to move it through the downstream end of the fluid delivery conduit.

Abstract: A dental treatment installation comprising at least one dental handpiece having an air operated drive motor and an outlet for discharging operating media used for dental purposes, a spray handpiece, a control arrangement for controlling the supply of operating media to the handpieces, and a storage device for the handpieces having storage switching-means which are arranged to place the handpieces on stand-by to receive operating media upon extraction of the handpieces from the storage device. The control arrangement includes supply sleeves having ducts for supplying operating media to both types of handpiece, couplings for releasably coupling the supply sleeves to the handpieces, and a foot-operated device for regulating the supply of operating media to the handpieces and including first switching-means for controlling the supply of air to drive the motor of the dental handpiece and second switching means for controlling the supply of spray to the dental handpiece.

Abstract: A dental syringe employs a single thumb or finger operated control member mounted on the syringe for regulating the flow of air or water or spray. The single control moves axially and vertically with respect to the syringe. Axial movement either forward or rearward from a rest position, initiates and controls the quantity of flow of air or water. Vertical movement of the control member initiates the flow of both air and water to produce a spray.

Abstract: An arrangement for the conveyance of a sterile liquid to a surgical treating or operating location, consisting of a liquid receptacle containing the sterile liquid, from which there can be dispensed the sterile liquid under the effect of pressure through a dispensing conduit from the dispensing end thereof, wherein the dispensing conduit is provided with a valve arrangement for regulating the throughflow.

Abstract: A hand held power tool, particularly of the type of a dental handpiece or the like is provided with power shut-off means disposed directly within the handle. The shut-off means is mechanically connected with a suspension means for suspending the hand piece or the like power tool such that the weight of the tool shuts off power supply to the tool. In a particularly preferred embodiment, a dental handpiece is disclosed wherein the suspension means is a magnet, whereby the handpiece can be suspended on any ferromagnetic surface without having to reach to a suspension fork which, in the known devices, is itself associated with a shut-off valve. The basic idea of the invention has broad application in many different fields of technology.

Abstract: A fluid control for powering and supplying coolant liquid to gas operated surgical and dental tools and for supplying irrigant to a suction-irrigation handpiece, selectively by remove control from a surgical or dental operating site. A console remote from the operating site has a pressurized gas source. The tool and an operator valve actuable for turning on the tool are located at the operating site, remote from the console. A tool gas supply at the console is actuable for supplying pressurized gas from the source to the remote operator valve and tool. A coolant supply at the console is actuable for delivering coolant liquid to an outlet tip located at the tool. Gas circuitry in the console responds to the drop in gas pressure in the tool gas supply resulting from turning on of the tool and thereby causes the coolant supply to supply liquid to the tip while the tool is running.

Abstract: This dental handpiece comprises means for controlling the delivery of compressed air and water to an outlet conduit leading to the head of the handpiece. The water and air supply conduits from the motor open each into a circular groove formed in the inner periphery of a socket easily fitted on the tool holder retaining end of the motor. Radial ports formed in the socket open on the one hand into the grooves, respectively, and on the other hand into an annular chamber formed between the socket and the handpiece body, the outlet conduit extending from this chamber. A rotary ring accessible from outside the handpiece body is provided with a pair of seals off-set axially and angularly to each other and so arranged that in two end positions of the ring one of the two supply conduits is closed while the other conduit is open, and that in an intermediate position both conduits are open.

Abstract: An attachable cleaning agent dispenser for retrofit use in combination with a conventional dental handpiece including a frame, gripping members for removably attaching the frame to a dental handpiece, a reservoir for containing a cleaning agent with the reservoir mounted on the frame, a dispensing orifice mountable adjacent a cleaning tool on the dental handpiece, a cleaning agent flow passageway connecting the reservoir and the orifice, a pneumatic piston slidable within the reservoir for ejecting cleaning agent from the reservoir, into the passageway, and out the orifice when pneumatic pressure is applied to the piston by finger control by an operator of the handpiece.

Abstract: A dental handpiece which has a connecting fitting for attachment to a supply hose having at least one agent supply line, a head section having a compressed air drive motor, a grip portion extending between the fitting and head section and a passage in each of said head section, grip portion and fitting for compressed air and a separate passage in each of these for any additional desired agents, characterized by the grip portion having a tubular sleeve portion, which is connected to the head section and receives the passage for compressed air and any other passages for agents, if present, and means detachably connecting the grip portion to the connecting fitting and includes means enabling relative rotation of the sleeve portion to the fitting so that the sleeve portion and each passage of the head section are rotatable relative to the fitting and each passage therein.