JP2010051557A - Dental clinic apparatus, and dental fluid conduit sterilizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental clinic apparatus which has a simple structure, and can perform the sterilization of contaminants in a fluid circuit. <P>SOLUTION: The dental clinic apparatus includes a fluid conduit in which water, air and so forth to be fed to treatment instruments such as an air turbine 14 and a micro-motor 15 used for the treatment of teeth of a patient from a fluid supply source flow. At a part or the total of the fluid circuit, the conduit is formed into a dielectric pipe structure. An electric field is formed by two high electric potential electrodes which are set on the outer periphery on the upstream and the downstream of the conduit and a high-voltage power source so that discharge may occur in the longitudinal direction of the conduit by stopping the supply of a fluid such as water or air, and feeding a rare gas in the fluid circuit. Thus, a plasma jet is formed in the conduit between the two high electric potential electrodes, and the inside of the conduit is sterilized. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a dental medical device and a dental fluid line sterilizing device, and more specifically, a dental medical treatment capable of reliably removing bacteria that propagate in a water circuit and an air circuit constituting these devices. The present invention relates to a device and a dental fluid line sterilizer.

  If there is residual water in the water circuit of the dental medical device, there is a tendency for bacteria in the residual water to increase, so from every dental treatment instrument including water circuit and handpiece for at least 3 minutes before daily medical treatment. Cleaning (flushing) is performed to discharge residual water.

  This flushing first releases the handpiece interlock (priority circuit mechanism that drives only the first handpiece picked up from the instrument 5 hanger during treatment) and then puts the handpiece on the bowl. It is set in an installed small receptacle, and water is supplied to the tip of the handpieces by supplying water from the pressurized water supply source to the water circuit.

  However, it is difficult to remove the bacterial nest (biofilm) attached to the pipe wall of the water circuit even if flushing is performed. In particular, when the dental care apparatus is not used for a long time on a closed day or the like, the biofilm tends to proliferate, which is a concern for the safety of dental care.

  For this reason, dental medical devices that generate hypochlorous acid and remove and wash biofilms have been developed. This dental medical device is a sterilized water generating device that electrolyzes water mixed with sodium chloride and hydrochloric acid in a non-diaphragm electrolysis layer to generate sterilized water adjusted to a predetermined residual free chlorine concentration and a predetermined acidic pH. Is arranged in the water circuit (see, for example, Patent Document 1).

  In the field of plasma technology, as a method for improving the wettability of the material surface and increasing the adhesive strength, an apparatus for irradiating plasma for pre-bonding treatment is marketed by Japan Plasmatree Co., Ltd.

  Further, Non-Patent Documents 1 and 2 disclose a study of converting a rare gas into plasma using a low-frequency high-voltage power supply, a study on plasma sterilization in a liquid, and the like.

JP 11-192247 A (Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research: Research on Specific Areas: 2007 Research Report: 2008.06.01: A01- (6) Study on “Generation and Analysis of Advanced Reaction Fields by Glow Plasma in Liquid” Representative: Katsuhisa Kitano) (Ministry of Education, Culture, Sports, Science and Technology: Grants-in-Aid for Scientific Research: Research on Specific Areas: FY2006 Research Results Report: 2007.02.26 Publication: A01- (6) Study on “Generation and Analysis of Advanced Reaction Fields by Glow Plasma in Liquid” Representative: Katsuhisa Kitano)

  However, since the conventional dental medical device generates sterilizing water by electrolysis, electric power for that purpose is required, and when using the sterilizing water, it is necessary to adjust to a predetermined chlorine concentration or pH value. For this reason, not only is the structure complicated, but also the control during use is troublesome. Furthermore, when incorporated in a dental care apparatus, a significant design change of the dental care apparatus is necessary, and it cannot be applied to an existing dental care apparatus as it is.

  The present invention has been made in consideration of the above-described conventional problems, and has a simple structure, particularly a dental medical device capable of sterilizing and disinfecting contaminants in a fluid circuit, and a simple structure. In particular, it is an object of the present invention to provide a dental fluid line sterilizer that can sterilize and disinfect contaminants in a fluid circuit and can be easily incorporated into an existing dental care apparatus.

  The present invention relates to a dental medical device having a fluid line through which a fluid supplied from a fluid supply source to a treatment instrument used to treat a patient's teeth flows, and supplying the fluid in part or all of the fluid circuit , And a rare gas is supplied from the fluid supply source, an electric field is formed on the outer periphery of the fluid conduit so that discharge occurs in the longitudinal direction of the conduit, and a plasma jet is generated inside the fluid conduit. The main feature is to sterilize the inside of the pipe.

  According to the invention described in claim 1, the dental medical device is a dental medical device having a fluid conduit through which a fluid supplied from a fluid supply source to a treatment instrument used for treatment of a patient's teeth flows. In part or all of the fluid circuit, supply of fluid is stopped, rare gas is supplied to the fluid circuit, and an electric field is formed on the outer periphery of the fluid conduit so that discharge occurs in the longitudinal direction of the conduit, By generating a plasma jet inside the fluid pipe line, wettability inside the pipe line is improved and combined with contaminants adhering to the pipe surface, thereby producing a cleaning effect. In addition, the inside of the pipe line can be sterilized by a plasma jet.

  According to the second aspect of the present invention, there is provided a dental clinical apparatus having a fluid conduit through which a fluid supplied from a fluid supply source to a treatment instrument used for treating a patient's teeth, wherein a part of the fluid circuit or In all cases, the pipe has a dielectric pipe structure, the supply of fluid is stopped, the rare gas is supplied to the fluid circuit, and discharges occur in the longitudinal direction of the pipe so that the outer circumferences upstream and downstream of the pipe An electric field is formed by two high-potential electrodes and a high-voltage power source installed on the top, and a plasma jet is generated inside the pipe line between the two electrodes. It can be sterilized by specifying the position.

  According to the third aspect of the present invention, there is provided a dental treatment apparatus having a fluid conduit through which a fluid supplied from a fluid supply source to a treatment instrument used for treatment of a patient's teeth flows. In all cases, the pipe has a dielectric pipe structure or a metal pipe structure, the supply of fluid is stopped, noble gas is supplied to the fluid circuit, and discharge occurs in the longitudinal direction of the pipe. By forming an electric field with a single high-potential electrode and a high-voltage power supply installed above and generating a plasma jet inside the pipe, the pipe inside the metal pipe can be sterilized.

  According to the fourth aspect of the present invention, as a pretreatment for generating a plasma jet by having a wetting treatment means for moistening with a liquid on the inner surface of the fluid conduit before supplying the rare gas to the fluid conduit. By making it wet, the sterilizing and disinfecting effect can be further enhanced by the in-liquid plasma jet.

  According to the fifth aspect of the present invention, there is provided a pretreatment in a wet state by having the cleaning treatment means for cleaning the inside of the pipe after the plasma jet is generated inside the fluid pipe and the inside of the pipe is sterilized and disinfected. It is possible to obtain an effect of cleaning contaminants adhered by sterilization and sterilization.

  According to the invention of claim 6, the wet processing means makes the wet state by supplying the fluid circuit with air, water, a chemical solution, or a cleaning solution alone or in combination of a plurality of liquids. In addition, the sterilizing and disinfecting effect can be further enhanced by the plasma jet in liquid by various combinations.

  According to the seventh aspect of the present invention, the water, the chemical solution, and the cleaning solution are acidic water having a pH value of 4.5 or less, so that the sterilization inside the pipeline can be more effectively performed.

  According to the invention described in claim 8, the cleaning treatment means is attached by wet pretreatment or sterilization by supplying air, water, chemical solution, cleaning solution alone or a plurality of combinations to the fluid circuit. Contaminants can be cleaned more effectively.

  According to the ninth aspect of the present invention, the water, the chemical liquid, and the cleaning liquid are alkaline water for neutralizing the fluid pipe line, so that the contaminants attached by wet pretreatment and sterilization can be removed. Furthermore, it can wash | clean and neutralize more effectively.

  According to the tenth aspect of the present invention, the wet treatment means, the generation of the plasma jet, and the cleaning treatment means can be combined one or more times to obtain various sterilization and cleaning effects.

  According to the eleventh aspect of the present invention, when the fluid conduit is a fluid conduit inside the dental handpiece, contaminants flow back into the dental handpiece and become contaminated. The plasma jet can improve wettability and can be sterilized in various ways.

  According to the invention described in claim 12, the fluid conduit is a flexible tube structure and is a fluid conduit inserted into the inside and the movable part of the dental treatment device, so that the fluid conduit is a dental treatment device. Even a hose accommodated in the movable arm can be sterilized and sterilized by improving wettability with a plasma jet.

  According to a thirteenth aspect of the present invention, since the fluid pipe is a dental instrument hose, the wettability inside the pipe of the dental instrument hose is improved and sterilized by a plasma jet. be able to.

  According to the fourteenth aspect of the present invention, each high-potential electrode can be provided by applying a low-frequency high-voltage power supply, thereby providing each dental treatment device that exhibits the above-described effects.

  According to the fifteenth aspect of the present invention, when the rare gas is helium gas or argon gas, it is possible to provide each dental treatment device having the above-described effects.

  According to the sixteenth aspect of the present invention, it is possible to connect from the outside to a fluid circuit portion of a dental medical device having a fluid line through which a fluid supplied from a fluid supply source to a treatment instrument used for treating a patient's teeth. A dental fluid line sterilizer comprising a plasma jet injection means connectable to a fluid line of the dental medical device, and a plasma jet irradiation means for irradiating a plasma jet, the plasma jet irradiation means being an injection By supplying a rare gas from the means to the continuous pipeline and forming an electric field on the outer circumference so that discharge occurs in the longitudinal direction of the pipeline, wetability inside the pipeline is improved and the pipeline surface adheres. A cleaning effect occurs due to the combination with contaminants. Further, it is possible to provide a dental fluid line sterilizer for sterilizing the inside of a pipe line with a plasma jet.

  According to the invention described in claim 17, the plasma jet irradiation means supplies the rare gas to the continuous pipeline from the injection means, and is installed on the upstream and downstream outer circumferences so that discharge occurs in the longitudinal direction of the pipeline. By forming an electric field composed of the two high-potential electrodes, a dental fluid line sterilization apparatus that exhibits the above-described effects can be provided.

  According to the invention described in claim 18, the plasma jet irradiation means is provided on the outer periphery of the pipeline so as to supply the rare gas from the injection means to the continuous pipeline and to cause discharge in the longitudinal direction of the pipeline. By forming an electric field composed of a single high-potential electrode, it is possible to provide a dental fluid line sterilizer that exhibits the above-described effects.

  According to the nineteenth aspect of the invention, the plasma jet injection means can be connected to the fluid conduit of the dental handpiece of the dental medical device, so that the dental fluid conduit sterilizer having the above-described effects can be obtained. Can be provided.

  According to the twentieth aspect of the present invention, the plasma jet injection means can be connected to the fluid line of the dental instrument hose of the dental medical device, so that the dental instrument hose can be connected by the plasma jet. It is possible to provide a dental fluid line sterilization apparatus that has an effect of improving wettability inside a pipe line and sterilizing and disinfecting.

  According to the invention of claim 21, the plasma jet injection means can be connected to the fluid conduit of the fluid supply source of the dental medical device, thereby improving the wettability of the fluid supply source and sterilizing and disinfecting. It is possible to provide a dental fluid line sterilizer that exhibits the following.

  According to the invention described in claim 22, when the rare gas is helium gas or argon gas, it is possible to provide a dental fluid line sterilizer having the above-described effects.

  According to a twenty-third aspect of the present invention, the high-potential electrode can be provided by applying a low-frequency high-voltage power supply, thereby providing a dental fluid line sterilizer having the above-described effects.

  The present invention relates to a dental medical device having a fluid line through which a fluid supplied from a fluid supply source to a treatment instrument used for treating a patient's teeth flows. A dielectric pipe structure is used, and the supply of fluid is stopped, rare gas is supplied from the fluid supply source, and installed on the outer circumferences upstream and downstream of the pipeline so that discharge occurs in the longitudinal direction of the pipeline. The above object is realized by a configuration in which an electric field is formed by two high potential electrodes, a plasma jet is generated inside the pipe line between the two electrodes, and the inside of the pipe line is sterilized.

  Hereinafter, a dental medical device and a dental fluid line sterilizer according to an embodiment of the present invention will be described in detail with reference to the drawings.

Example 1
With reference to FIG. 1 thru | or FIG. 7, the dental treatment apparatus which concerns on Example 1 of this invention is demonstrated. FIG. 1 is a side view of the dental examination apparatus according to the first embodiment, and FIG. 2 is a top view thereof.

  As shown in FIGS. 1 and 2, the dental medical device according to the first embodiment is provided with a unit main body 2 on the side of a dental medical chair 1, and a bowl 3 is provided on the upper surface of the unit main body 2. . A bowl washing tube 9 projects from the unit body 2 side on the outer peripheral upper surface of the bowl 3. Further, a cup water supply pipe 4 for the patient to supply water to the gargle cup 4a extends from the unit main body 2. In FIGS. 1 and 2, reference numeral 52 denotes a dental lighting device.

  Further, a table portion 6 is attached to the unit main body 2 so as to be movable up and down and left and right via an arm 8 using a plurality of joints.

  The table section 6 is provided with an instrument 5 for performing dental treatment. The instrument 5 is detachably connected to the lower portion of the table unit 6 using an instrument hose 50.

  As the instrument 5, for example, an air turbine 14 for cutting teeth, a micromotor 15, a syringe 7 for cooling a tooth affected part, and removing cutting powder and adhering substances are provided.

  As will be described later, a water or air fluid circuit (fluid conduit) is connected to the bowl washing tube 9, the cup water supply tube 4, and the instrument 5.

  FIG. 3 is a piping diagram showing a general water fluid circuit in a dental medical device. A fluid circuit for supplying water necessary for medical treatment is connected to a main cock 11 of a dental medical device from a water pressure source 10 in a medical office, and is provided in the unit main body 2 through a pressure reducing valve 12 and a check valve 13. It is connected to a cup water supply pipe 4 and a pot washing pipe 9.

  Water supply opening / closing control is performed on the cup water supply pipe 4 and the bowl washing pipe 9 by a main body control valve 17 provided in the unit main body 2.

  The water fluid circuit is also connected to an air turbine 14, a micromotor 15, and a syringe 7, which are instruments 5 prepared in the table unit 6, and these controls are performed by the table unit control provided in the table unit 6. Performed by the valve 16. The injection of water into the instrument 5 is used to cool the affected area during tooth cutting or during treatment, or to remove deposits.

  FIG. 4 is a piping diagram showing a general air fluid circuit of a dental medical device. Compressed air supplied from a compressor (not shown) is supplied to an air supply source 18 of a dental medical device, and passes through a main cock 19, a pressure reducing valve 20, and a check valve 21 by a fluid circuit of air, so that the unit main body 2 and arm 8 is sent to the table control valve 22 provided in the table 6.

  The table control valve 22 performs air opening / closing control of the instrument 5 such as the air turbine 14, the micromotor 15, and the syringe 7. The air supplied to the air turbine 14 is not only used for rotating the turbine for driving the turbine, but also used for cooling the affected part or spraying with water.

  Further, the micromotor 15 and the syringe 7 are used for cooling the affected part at the time of tooth cutting and treatment, and for removing cutting powder and adhering substances. Further, it is mixed with water and used as a cooling means as a spray.

  In FIGS. 3 and 4, 7 a is a throttle valve provided in the front stage of the syringe 7.

  Next, with reference to FIG. 5, the dental medical device of the first embodiment will be described. The dental medical device according to the first embodiment is provided with a switching valve 23 in the subsequent stage of the check valve 13 in addition to the configuration of the water fluid circuit of the general dental medical device shown in FIG. 23, compressed air is supplied via a pipe branched from the air supply source 18, a high pressure cylinder 24 filled with helium gas (He gas) is connected to the switching valve 23, and The switching valve 23 is characterized in that a chemical liquid tank 25 and a chemical liquid tank 26 filled with pressurized chemical liquid, cleaning liquid, acidic water, or the like are connected.

  In this case, although not shown, it is possible to prevent other fluids from flowing back to the supply source by inserting check valves in the water and air pipes.

  Other configurations are the same as those shown in FIG. That is, the output side of the switching valve 23 is connected to the main body control valve 17 and the table portion control valve 16 as in the case shown in FIG.

  The switching valve 23 can open or close one or a plurality of inputs simultaneously or sequentially by opening / closing control on the input side.

  Since these controls can be easily performed by, for example, a sequencer or computer control (not shown), a control method is omitted.

  As an example of control of the switching valve 23 in the dental medical device of the first embodiment, for example, the supply of water in the water fluid circuit is stopped, and then helium gas, which is a rare gas, is injected into the water fluid circuit. In order to make the water fluid circuit wet before injecting the rare gas helium gas (or argon gas) into the water fluid circuit, water and compressed air are sent simultaneously to wet the inside of the pipe An aspect etc. can be mentioned.

  Further, by the control by these switching valves 23, the air, water, chemical liquid, and cleaning liquid constituting the wet processing means and the cleaning processing means are independently provided in the fluid circuit leading to the cup water supply pipe 4, the bowl washing pipe 9 and the instrument 5, Alternatively, a plurality of combinations can be supplied to create various wet states or to clean the fluid circuit.

  In other words, it is possible to increase the sterilization and disinfection effect by generating a plasma jet state in the liquid by the wet treatment means, and to clean the contaminants attached by the pretreatment and sterilization and disinfection in the wet state. Obtainable.

  Further, by filling the chemical tank 25 or the chemical tank 26 with acidic water, it is possible to create an acidic wet state inside the fluid circuit leading to the cup water supply pipe 4, the bowl washing pipe 9, and the instrument 5. is there. Furthermore, it is possible to further improve the sterilizing and disinfecting effect by filling acidic water having a pH value of 4.5 or less.

  Further, the water, chemical solution, and cleaning solution are used as alkaline water for neutralizing the fluid circuit of the water, and the contaminants adhered by wet pretreatment and sterilization are more effectively cleaned and neutralized. To be able to.

  Such wet processing by the wet processing means, generation of a plasma jet, which will be described later in detail, and cleaning processing by the cleaning processing means, can be combined one or more times by the control by the switching valve 23. Various sterilization and cleaning effects can be obtained.

  In FIG. 5, A and B in the water supply line 30 which constitutes a part of the water fluid circuit indicate piping passing through the inside of the arm 8 shown in FIG. Since the arm 8 is movable up and down and left and right at a plurality of joints, a flexible hose such as a urethane hose is used.

  In this case, even if the fluid conduit is a hose such as a urethane hose accommodated in the movable arm of the dental treatment apparatus, wettability can be improved by plasma jet and sterilization can be performed.

  Further, the wettability in the pipe line of the instrument hose 50 can be improved and sterilized.

  Between A and B in the water supply line 30 shown in FIG. 5, as shown in FIG. 6, it is installed on the outer circumferences upstream and downstream of the water supply line 30 so that discharge occurs in the longitudinal direction of the water supply line 30. An electric field is formed by the two high potential electrodes 27 and 28, and a plasma jet is generated in the water supply line 30 between the two high potential electrodes 27 and 28 based on the configuration shown in FIG. The inside of the path 30 is sterilized and disinfected.

  The means for generating the plasma jet shown in FIG. 6 includes two high-potential electrodes 27 and high-potential electrodes 28 installed at predetermined intervals of, for example, several centimeters to several tens of centimeters on the upstream and downstream peripheries of the water supply pipe 30. And have.

  Further, a low-frequency high-voltage power supply 29 having an output of about 10 kHz, 10 kV, for example, connected to the two high-potential electrodes 27 and 28 is provided, and a high voltage is applied to the two high-potential electrodes 27 and the high-potential electrode 28. In addition, the high potential electrode 27 is grounded. That is, the high potential electrode 28 on the downstream side is a high voltage electrode.

  A plasma jet is generated by dielectric barrier discharge in the water supply line 30 between the two high potential electrodes 27 and 28 and the inside of the water supply line 30 is sterilized.

  In the dental medical device according to the first embodiment, the means for generating the plasma jet shown in FIG. 6 may be provided between C and D of the water supply line 30a leading to the air turbine 14 shown in FIG. Also in this case, as in the case described above, the inside of the water supply conduit 30a leading to the air turbine 14 between C and D can be sterilized. The water supply line 30a corresponds to the instrument hose 50 shown in FIG.

  In addition to this, it is of course possible to provide means for generating the plasma jet shown in FIG. 6 in each water supply line leading to the micromotor 15 and the syringe 7 so as to perform sterilization and disinfection in each water supply line. is there.

  Further, as shown in FIG. 5, means for generating a plasma jet shown in FIG. 7 is provided between E and F of a water supply pipe line 30b constituted by a metal pipe corresponding to the cup water supply pipe 4, and the water supply pipe It can also be set as the structure which sterilizes the inside of the path | route 30b. The structure corresponding to the cup water supply pipe 4 may be a dielectric pipe structure such as resin.

  The means for generating the plasma jet shown in FIG. 7 includes a high-potential electrode 27 disposed in the water supply line 30b, and one end of a low-frequency high-voltage power supply 29 having an output of about 10 kHz, 10 kV, for example, is connected to the high-potential electrode 27, The other end side of the low frequency high voltage power supply 29 is grounded.

  The high-potential electrode 27 generates a plasma jet due to dielectric barrier discharge in the water supply line 30b to sterilize the inside of the water supply line 30b.

  Similarly to the case described above, the bowl washing tube 9 can be configured to dispose the means for generating the plasma jet shown in FIG. 7 and sterilize the inside of the bowl washing tube 9 with the plasma jet.

  According to the dental medical device of the first embodiment described above, the wettability improvement inside the pipeline constituting the fluid circuit is performed, and the plasma jet is combined with the contaminants adhering to the pipeline surface, A cleaning effect occurs, and furthermore, the inside of the pipe line can be sterilized by a plasma jet.

  If the electric field is formed by the two high potential electrodes 27 and 28 and a plasma jet is generated inside the pipe, the position inside the pipe such as an insulating pipe or hose such as a resin or urethane hose is designated. Can be sterilized.

Further, if the electric field is formed by the single high potential electrode 27 and the plasma jet is generated inside the pipe line, the inside of the metal pipe can be sterilized and disinfected. In the case of a single high potential electrode 27, even a dielectric pipe structure can be sterilized.
In this embodiment, the pipe section is limited. However, the switching valve 23 and the high-pressure cylinder 24, the chemical tank 25, and the chemical tank 26, which are the inputs thereof, are provided at the inlet of the water pressure source 10. By providing the plasma jet generating means of FIG. 6 or FIG. 7 at an appropriate place, it is possible to sterilize and disinfect all sections of the water supply pipe.

(Example 2)
Next, referring to FIG. 8 and FIG. 9, a dental medical apparatus according to Embodiment 2 of the present invention will be described.

  FIG. 8 shows that a fluid pipe 32 of compressed air provided inside a dental handpiece 31 which is a kind of dental medical device is provided with means for generating a plasma jet similar to the case shown in FIG. The example comprised so that sterilization in the path | route 32 might be performed is shown.

  The dental handpiece 31 is a cutting bar 35 inserted into the rotating shaft of a blade 34 at the tip of a handpiece main body 33 mainly composed of a metal material bent and formed in a substantially reverse letter shape that can be held and held. Is a cutting tool type that is rotatably mounted, and compressed air is supplied to the fluid conduit 32 from the outside, the cutting bar 35 with blades 34 is driven to rotate, and an exhaust air conduit 32 a is provided in the handpiece body 33. And exhausted to the outside. Incidentally, the rotation control of the handpiece is performed by opening and closing the table control valve 22 by a control signal of the foot controller 53 of FIG.

  In this case, it is of course possible to provide the fluid conduit 32 with means for generating a plasma jet similar to the case shown in FIG.

  According to the dental handpiece 31 having such a configuration, even when contaminants flow backward in the dental handpiece 31 and are contaminated, the wettability is improved by the plasma jet and various sterilizations are performed. Can be disinfected.

  FIG. 9 shows the basic configuration of the dental medical device according to the second embodiment, which is the same as that of the dental medical device of the first embodiment, except that a table unit control valve 22 is provided on the output side of the switching valve 23. It is characterized in that the fluid circuit of the air of the instrument 5 such as the air turbine 14, the micromotor 15, and the syringe 7 is connected via the connection.

  In the dental medical device according to the second embodiment, the same as the case shown in FIG. 6 is provided between A and B of the air pipe 51 constituting the fluid circuit between the switching valve 23 and the table control valve 22. A means for generating a plasma jet is provided, and the air pipe 51 is sterilized and disinfected by the plasma jet in the same manner as described above, or an air pipe between the table control valve 22 and the air turbine 14 is provided. A means for generating a plasma jet similar to that shown in FIG. 6 is provided between C and D of the passage 51a, and the inside of the air pipe 51a is sterilized by the plasma jet in the same manner as described above. be able to.

  Also between the table control valve 22 and the micromotor 15, and between the table control valve 22 and the syringe 7, the inside of the air pipe can be sterilized by plasma jet based on the same configuration.

According to the dental medical device according to the second embodiment, with respect to the air fluid circuit in the dental medical device, the wettability inside the pipe is improved as in the case of the first embodiment, and the plasma jet is supplied to the tube. By combining with contaminants adhering to the road surface, a cleaning effect is generated, and furthermore, the inside of the pipe line can be sterilized by a plasma jet.
Also in this embodiment, the switching section 23 and the input high-pressure cylinder 24, the chemical liquid tank 25, and the chemical liquid tank 26 are provided at the inlet of the air supply source 18 without limiting the pipe section. By providing the plasma jet generating means shown in FIG. 6 or FIG. 7 at an appropriate place, it is possible to sterilize and disinfect all sections of the air pipe.

(Example 3)
A dental fluid line sterilizer 41 according to Embodiment 3 of the present invention will be described with reference to FIGS.

  The dental fluid line sterilization apparatus 41 according to the third embodiment shown in FIG. 10 has an on-off valve in the middle of the apparatus main body 42 mainly composed of a metal material bent and formed in a substantially U-shape that can be held and held. As shown in FIG. 6, the noble gas pipe 38 providing 39 is incorporated into the two noble gas pipes 38 at a predetermined interval of about several tens of mm, which is a means for generating a plasma jet. The high-potential electrode 28 is installed, and a low-frequency high-voltage power supply 29 having an output of, for example, 10 kHz or 10 kV is mounted in the apparatus main body 42, and helium gas is supplied to the rare gas pipe 38 from the outside. It is configured.

  The high potential electrode 27 side is installed in the apparatus main body 42. Further, a plasma jet irradiation port 36 is provided at the tip of the apparatus main body 42, and a plasma generation switch 37 is provided at the outer peripheral part of the apparatus main body 42.

  The plasma jet irradiation port 36 functions as plasma jet injection means connectable to the fluid conduit of the dental medical device described in the first embodiment.

  According to the dental fluid line sterilizer 41 according to the third embodiment, the plasma jet irradiation port 36 of the dental fluid line sterilizer 41 is provided on the basis of the configuration in which the two high potential electrodes 27 and 28 are provided. Connected to the fluid line of the dental medical device (for example, C part of C and D parts in the fluid circuit 14a of air reaching the air turbine 14 shown in FIG. 4 (that is, part C of the instrument hose 50)) Is connected to the fluid circuit 14a), and the wettability inside the fluid circuit 14a is improved by injecting the plasma jet and combined with the contaminant adhering to the surface of the pipe line, so that the cleaning effect is exhibited. be able to.

  That is, it is possible to provide a dental fluid line sterilization apparatus that sterilizes and disinfects the inside of a fluid line of a dental medical apparatus with a plasma jet.

  FIG. 11 shows a dental fluid line sterilizer 41A which is a modification of the third embodiment. This dental fluid line sterilizer 41A is basically the dental fluid line sterilizer. 41, the rare gas pipe 38 is provided with means for generating a plasma jet similar to that shown in FIG. 6, and a high-pressure cylinder containing helium gas in the apparatus main body 42. It is a feature that 43 is mounted.

  According to the dental fluid line sterilizer 41A shown in FIG. 11, the plasma jet irradiation port 36 of the dental fluid line sterilizer 41A is based on the configuration having the single high potential electrode 27 as described above. In the same way as above, it is connected to the fluid pipeline of the dental clinic and injected with a plasma jet to improve the wettability inside the fluid pipeline and combine with the contaminants adhering to the pipeline surface, so it has a cleaning effect. Can be demonstrated.

  In the example shown in FIG. 12, the plasma jet irradiation port 36 of the dental fluid line sterilizer 41 shown in FIG. 10 is connected to the fluid line 32 in the normal dental handpiece 31A via the cylindrical connection adapter 40. Connected to the inlet, injecting a plasma jet into the fluid conduit 32 of the dental handpiece 31, thereby improving the wettability of the fluid conduit 32 and the contaminants adhering to the surface of the conduit In order to bond, the cleaning effect is exhibited.

  In this case, the same action and effect can be exhibited even when the dental fluid line sterilizer 41A shown in FIG. 11 is used.

  In addition, the dental fluid line sterilizer 41 or 41A is connected to a fluid supply source of the dental medical apparatus, for example, a fluid line such as the air supply source 18, and wettability inside these fluid lines. Improvements can be made and a cleaning effect can be exhibited. That is, according to the dental fluid line sterilizer 41 or 41A, it can be easily incorporated into an existing dental care apparatus.

  The configurations of the dental medical device and the dental fluid line sterilizer of the present invention can be widely applied to various dental treatment instruments such as a tooth surface cleaning instrument and a drilling instrument in addition to the above-described cases.

It is a side view of the dental treatment apparatus which concerns on Example 1 of this invention. 1 is a top view of a dental medical device according to a first embodiment. It is a schematic piping diagram which shows the general fluid circuit of water in a dental medical device. It is a schematic piping diagram which shows the general fluid circuit of the air of a dental medical device. 1 is a schematic piping diagram illustrating a fluid circuit of a dental medical device according to a first embodiment. It is the schematic which shows the structural example of the means to produce | generate the plasma jet in the dental medical device which concerns on the present Example 1. FIG. It is the schematic which shows the other structural example of the means to produce | generate the plasma jet in the dental medical device which concerns on the present Example 1. FIG. It is a schematic sectional drawing of the dental handpiece which is a kind of dental medical device which concerns on Example 2 of this invention. It is a schematic piping diagram which shows the fluid circuit of the dental medical device which concerns on Example 2 of this invention. It is a schematic block diagram of the dental fluid line sterilizer which concerns on Example 3 of this invention. It is a schematic block diagram which shows the modification of the dental fluid line sterilizer which concerns on Example 3 of this invention. It is a schematic sectional drawing which shows the example which connected the dental fluid line sterilizer which concerns on Example 3 of this invention to the dental handpiece.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dental examination chair 2 Unit main body 3 Bowl 4 Cup water supply pipe 4a Cup 5 Instrument 6 Table part 7 Syringe 7a Throttle valve 8 Arm 9 Bowl washing tube 10 Water pressure source 11 Original cock 12 Pressure reducing valve 13 Check valve 14 Air turbine 14a Fluid circuit 15 Micro motor 16 Table control valve 17 Body control valve 18 Air supply source 19 Original cock 20 Pressure reducing valve 21 Check valve 22 Table control valve 23 Switching valve 24 High pressure cylinder 25 Chemical tank 26 Chemical tank 27 High potential electrode 28 High potential electrode 29 Low frequency high voltage power supply 30 Water supply line 30a Water supply line 30b Water supply line 31 Dental handpiece 31A Dental handpiece 32 Fluid line 32a Exhaust air line 33 Handpiece body 34 Blade 35 Cutting bar 36 Plasma Jet irradiation port 37 Plasma generating switch 38 Noble gas line 39 Open / close valve 40 Connection adapter 41 Dental fluid line sterilizer 41A Dental fluid line sterilizer 42 Main unit 43 High pressure cylinder 50 Instrument hose 51 Air line 51a Air line 52 Lighting device 53 Foot controller

Claims (23)

A dental practice device having a fluid line through which a fluid supplied from a fluid source to a treatment instrument used to treat a patient's teeth,
In part or all of the fluid circuit, supply of fluid is stopped, rare gas is supplied to the fluid circuit, and an electric field is formed on the outer periphery of the fluid conduit so that discharge occurs in the longitudinal direction of the conduit, A dental medical device characterized in that a plasma jet is generated inside a fluid line to sterilize the inside of the line. A dental practice device having a fluid line through which a fluid supplied from a fluid source to a treatment instrument used to treat a patient's teeth,
In part or all of the fluid circuit, the conduit has a dielectric pipe structure, the supply of the fluid is stopped, the rare gas is supplied to the fluid circuit, and a discharge occurs in the longitudinal direction of the conduit. An electric field is formed by two high-potential electrodes and a high-voltage power supply installed on the outer periphery of the upstream and downstream of the tube, a plasma jet is generated inside the pipe line between the two electrodes, and the inside of the pipe line is sterilized and disinfected. Dental medical device to do. A dental practice device having a fluid line through which a fluid supplied from a fluid source to a treatment instrument used to treat a patient's teeth,
In part or all of the fluid circuit, the pipe is a dielectric pipe structure or a metal pipe structure, the supply of fluid is stopped, a rare gas is supplied to the fluid circuit, and a discharge occurs in the longitudinal direction of the pipe. Dental treatment characterized by forming an electric field with a single high-potential electrode and high-voltage power supply installed on the outer periphery of the pipeline, generating a plasma jet inside the pipeline, and sterilizing the inside of the pipeline apparatus.   The dental medical device according to any one of claims 1 to 3, further comprising a wet treatment unit that wets the inner surface of the fluid pipe with a liquid before supplying the rare gas to the fluid pipe. .   The dental apparatus according to any one of claims 1 to 4, further comprising a cleaning processing means for cleaning the inside of the pipe line after generating a plasma jet inside the fluid pipe line and sterilizing and disinfecting the inside of the pipe line. Medical equipment.   5. The dental medical device according to claim 4, wherein the wet treatment means is brought into a wet state by supplying the fluid circuit with one or a combination of air, water, a chemical solution and a cleaning solution.   The dental medical device according to claim 6, wherein the water, the chemical solution, and the cleaning solution are acidic water having a pH value of 4.5 or less.   6. The dental medical device according to claim 5, wherein the cleaning processing means supplies the fluid circuit with air, water, a chemical solution, a cleaning solution alone or a combination thereof.   The dental medical device according to claim 8, wherein the water, the chemical liquid, and the cleaning liquid are alkaline water for neutralizing the fluid conduit.   The dental treatment according to any one of claims 1 to 9, wherein the wet treatment by the wet treatment means, the generation of the plasma jet, and the cleaning treatment by the cleaning treatment means can be combined once or multiple times. Medical equipment.   The dental treatment apparatus according to claim 1, wherein the fluid conduit is a fluid conduit inside a dental handpiece.   The dental medical device according to any one of claims 1 to 10, wherein the fluid conduit has a flexible tube structure and is a fluid conduit inserted through the inside and a movable part of a dental treatment device.   The dental medical device according to any one of claims 1 to 10, wherein the fluid conduit is a hose of a dental instrument.   The dental treatment apparatus according to claim 1, wherein the high potential electrode is formed by applying a low frequency high voltage power source.   The dental care apparatus according to any one of claims 1 to 3, wherein the rare gas is helium gas or argon gas. A dental fluid line sterilizing device connectable from the outside to a fluid circuit part of a dental medical device having a fluid line through which a fluid supplied from a fluid supply source to a treatment instrument used for treating a patient's teeth flows. ,
It comprises a plasma jet injection means connectable to the fluid conduit of the dental medical device, and a plasma jet irradiation means for irradiating the plasma jet. The plasma jet irradiation means is connected to the fluid conduit continuous from the plasma jet injection means. A dental fluid line sterilizing apparatus characterized by supplying a rare gas and forming an electric field on the outer periphery so that discharge occurs in the longitudinal direction of the fluid line.   The plasma jet irradiating means supplies a rare gas to a continuous fluid line from the plasma jet injecting means and two high-potential electrodes installed on the upstream and downstream outer circumferences so that discharge occurs in the longitudinal direction of the fluid line. 17. The dental fluid line sterilizer according to claim 16, wherein an electric field comprising:   The plasma jet irradiation means supplies a rare gas to a continuous fluid line from the plasma jet injection means, and a single high potential installed on the outer periphery of the fluid line so that discharge occurs in the longitudinal direction of the fluid line. 17. The dental fluid line sterilizer according to claim 16, wherein an electric field comprising electrodes is formed.   19. The dental fluid line sterilizer according to claim 16, wherein the plasma jet injection means is connectable to a fluid line of a dental handpiece of the dental medical device.   19. The dental fluid line sterilizer according to claim 16, wherein the plasma jet injection means is connectable to a fluid line of a hose of a dental instrument of the dental medical device.   19. The dental fluid line sterilizer according to claim 16, wherein the plasma jet injection means is connectable with a fluid line of a fluid supply source of the dental medical device.   The dental medical device according to any one of claims 17 to 21, wherein the rare gas is helium gas or argon gas.   The dental treatment apparatus according to any one of claims 17 to 21, wherein the high potential electrode is formed by applying a low frequency high voltage power source.

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