WO2019110593A1

WO2019110593A1 - Dental treatment and/or examination arrangement comprising means for disinfecting a media feed line, and method therefor

Info

Publication number: WO2019110593A1
Application number: PCT/EP2018/083499
Authority: WO
Inventors: Hubert Mösslang; Jörg Eberle
Original assignee: Kaltenbach & Voigt Gmbh
Priority date: 2017-12-05
Filing date: 2018-12-04
Publication date: 2019-06-13

Abstract

The invention relates to a dental treatment and/or examination arrangement which comprises a supply unit (3) for providing supply media for an instrument (2) for the purpose of dental treatment and/or examination, the supply media being at least air and a liquid. The treatment and/or examination arrangement also comprises media feed lines (4, 5) for conducting the air and the liquid from the supply unit (3) to the instrument (2), and means (6) for introducing a disinfecting gas into the media feed line (4) for the liquid. The means (6) for introducing a disinfecting gas into the media feed line (4) for the liquid allow the media feed line (4) to be flushed with the disinfecting gas, thereby disinfecting them in a particularly suitable manner.

Description

Dental treatment and / or examination arrangement with means for disinfecting a media supply line, and method for this purpose The invention relates to a dental treatment and / or

Examination arrangement comprising a supply unit for providing supply media for an instrument for dental treatment and / or examination, wherein the supply media comprise at least air and a liquid, and media supply lines for directing the air and the liquid from the supply unit to the instrument. Furthermore, the invention relates to a method for disinfecting a corresponding Medienzuführleitung for the liquid.

4 shows a sketch of an example of a dental treatment unit 100 as an example of a dental treatment and / or examination arrangement. Hereinafter, this treatment and / or examination arrangement is also referred to as "arrangement" for short. The arrangement 100 comprises inter alia a so-called dentist element 110, which is arranged pivotably in relation to a base part 112 of the arrangement 100, and a patient chair 113.

The base part 112 can be provided in particular for the operation of the

Arrangement 100 to be placed on a floor surface of a room. Furthermore, the arrangement 100 comprises a support arm 117, which is connected on the one hand to the base part 112 and on the other hand to the dentist element 110, wherein the dentist element 110 is pivotally connected by the support arm 117 to the base element 112.

The dentist element 110 serves to hold an instrument 102 for dental treatment and / or examination, for example in the form of a handpiece, an angle piece, a turbine or a tartar removal device. The instrument 102 has a media line for a liquid, in particular water, and a media line for air. These two media lines of the instrument 102 are open at a front end of the instrument 102 to the outside, so that the respective media when working with the instrument 102 to a

corresponding job can be given. To provide the media is used, for example, arranged in the dentist element 110 supply unit, wherein a liquid medium supply line to direct the liquid from the supply unit to the instrument 102 and a medium supply line for the air is used to remove the air from the

Supply unit to the instrument 102 to conduct. The instrument 102 is connected via a flexible or deformable instrument or supply tube 114 with a receiving device of the arrangement 100, for example in the form of the

Dentist element 110, connected, with the two mentioned

Media supply lines extend through the supply hose 114 therethrough.

To connect the instrument 102 to the supply hose 114 is a, attached to the supply hose 114 coupling unit. In the connected or plugged state, the instrument 102 is operatively connected to the coupling unit; The mentioned media can in this state from the

Media supply lines coming into the instrument 102 and in the respective media lines of the instrument 102 flow.

On the receiving device or the dentist element 110, with the

Supply hose 114 is connected, there is an example quiver-like holding device 115 for holding the coupling unit. The coupling unit can be removed with the attached instrument 102 from the holding device 115 and moved away from the receiving device or the dentist element 110, in particular to a workstation, wherein the supply tube 114 deforms accordingly. After working with the instrument 102, the latter can be returned together with the coupling unit back into the holding device 115.

After a treatment, the instrument 102 can be separated from the coupling unit, in particular by withdrawing the instrument 102 from the

Clutch unit. This disconnection of the instrument 102 from the coupling unit after work is usually performed in the dental practice,

for example after a treatment of a patient. Thus, during operation with the instrument 102, the media fluid and air are generally passed through the media supply lines.

As a rule, a treatment center has several corresponding ones

Coupling units and accordingly a plurality of supply hoses, each of the coupling units is connected to one of the supply hoses according to and all supply hoses on the other hand with the

Aufhahmeeinrichtung or the dentist element 101 are connected. In dentistry, patients and those working in this field have different characteristics due to the particularities of the dental treatment

Infection risks. Therefore, a dental treatment and / or

Examination of appropriate hygienic requirements. This concerns, inter alia, the mentioned media supply line for the liquid. In Germany, according to § 3 of the Drinking Water Ordinance (TrinkwV), only water that meets the requirements of this Ordinance may be fed into dental treatment centers. However, even if this standard is adhered to, the water-bearing systems of dental treatment units are frequently colonized by different microorganisms.

Relevant recommendations with regard to hygiene can be found, for example, in the document "Infection Prevention in Dentistry - Hygiene Requirements; Communication from the Commission for Hospital Hygiene and Hygiene

Infection Prevention at the Robert Koch Institute ".

To ensure a suitable microbiological quality of the water, a colony count of 100 / mL should not be exceeded. This is apparent from the last-mentioned document under point 5 "Water-bearing systems" in conjunction with § 3 of the TrinkwV. To ensure this, disinfection systems in

Treatment units are installed and flushed the water-bearing systems every morning and after each treatment of a patient.

In this connection, US 5,807,521 discloses that for cleaning or disinfecting the supply lines for a dental Handpiece the water used for this additional ozone can be added and the supply lines are cleaned with the water-ozone mixture. In this type of cleaning, water can be left behind in the supply lines, which can then be colonized again by microorganisms.

The invention has for its object to provide a corresponding improved or alternative dental treatment and / or examination arrangement; while the arrangement should be particularly suitable and easy

To be performed disinfecting the media supply for the liquid of the arrangement are suitable. Furthermore, a method for disinfecting a

Media supply for the liquid of a corresponding treatment and / or investigation arrangement can be specified.

This object is achieved according to the invention with the objects mentioned in the independent claims. Particular embodiments of the invention are indicated in the dependent claims.

According to the invention, a dental treatment and / or

An examination arrangement is provided, which has a supply unit for providing supply media for a dental treatment and / or examination instrument, the supply media comprising at least air and a liquid. Furthermore, the treatment and / or

Inspection arrangement Media supply lines for conducting the air and the liquid from the supply unit to the instrument, as well as means for introducing a disinfecting gas into the medium supply line for the liquid. The treatment and / or examination arrangement is designed to sequentially first pass the liquid and subsequently the disinfecting gas into the medium supply line for the liquid. By the means for introducing a disinfecting gas in the

Media supply line for the liquid, this media supply line can be flushed with the disinfecting gas and disinfected in this way particularly suitable. Preferably, the means for introducing a disinfecting gas into the medium supply line for the liquid are designed as a component of the supply unit. This is space-saving and functionally advantageous because the Medienzuführleitung for the liquid extends from the supply unit.

Preferably, the means for introducing a disinfecting gas into the fluid media supply line are connected via a gas line to a source of the disinfecting gas. As a result, in particular facilitated handling when introducing the disinfecting gas into the Medienzuführleitung for the liquid is possible.

Preferably, the means for introducing a disinfecting gas into the medium supply line for the liquid are further configured for introducing a further gas, in particular for introducing air into the medium supply line for the liquid. Thus, the media supply line for the liquid can be flushed with the other gas; This is especially suitable as a preparatory measure before the introduction of the disinfecting gas. Preferably, accordingly, the introduction of the further gas takes place between the introduction of the liquid and the introduction of the disinfecting gas.

In this case, the means for introducing a disinfecting gas into the medium supply line for the liquid via a further gas line to a source of the further gas are preferably connected for ease of use. A particularly suitable preparation for the introduction of the disinfecting gas is made possible when the additional gas is introduced with overpressure. For this purpose, the source of the further gas is advantageously designed to deliver the additional gas with an overpressure, in particular as an air pressure source. For example, ozone is particularly suitable as the disinfecting gas. Also the

Use of chlorine dioxide or possibly ethylene oxide would be conceivable.

Preferably, the means for introducing a disinfecting gas into the fluid medium supply line are particularly suitable for introducing a valve of the disinfecting gas in the medium supply line for the liquid. In this case, the valve preferably has a first switching position and a second switching position, wherein the first switching position for introducing the liquid into the

Media supply line for the liquid is used and the second switching position for introducing the disinfecting gas in the media supply for the liquid.

Further preferably, the means for introducing a disinfecting gas in the Medienzuführleitung for the liquid are designed such that the second switching position of the valve serves as an alternative or in addition to the introduction of the disinfecting gas for introducing the other gas into the Medienzuführleitung for the liquid. Thus, it is particularly suitable to introduce either only the disinfecting gas or only the further gas or both of the gases mentioned simultaneously into the medium supply line for the liquid. Preferably, the means for introducing a disinfectant gas into the medium supply line for the liquid comprise a gas line section connected to a port of the valve, wherein the means are designed so that either the disinfecting gas or the further gas or gas is introduced into the gas line section the disinfecting gas and at the same time the further gas can be introduced.

Preferably, the media supply lines extend into a coupling unit which is designed to be connected to the instrument, preferably via a plug connection or a plug / rotary connection. This is how the

Disinfect the liquid media supply line over a particularly wide area.

Preferably, the media supply lines extend through a particularly flexible supply hose, which is arranged between the supply unit on the one hand and the clutch unit on the other. This is how the part of the

Dispose of media supply line for the liquid that extends through the supply hose, particularly suitable. Preferably, the treatment and / or examination arrangement further comprises a receiving device, in particular in the form of a so-called

Dentist element, with a holding device for the coupling unit, wherein the

Aufhahmevorrichtung preferably arranged horizontally movable on a support arm of the treatment and / or examination arrangement is arranged. In this case, the supply unit is preferably arranged in the receiving device.

According to a further aspect of the invention, a method for disinfecting a fluid medium supply line of a dental treatment and / or examination arrangement is provided, wherein the treatment and / or examination arrangement comprises a supply unit for providing

Supply media for an instrument for dental treatment and / or examination. The supply media comprise at least air and a liquid, wherein media supply lines for guiding the air and the liquid from the supply unit to the instrument are configured. The

A method for disinfecting the media supply line for the liquid has the following steps: a) rinsing the media supply line for the liquid with water, and subsequently b) introducing a disinfecting gas into the

Media supply line for the liquid.

The disinfecting gas can be used to achieve a particularly suitable disinfection of the medium supply line for the liquid.

Preferably, the method after rinsing with water and before the

Introduce the disinfecting gas to the following additional step: c)

Introducing compressed air into the fluid media supply line. As a result, the medium supply line for the liquid can be blown through, as it were, whereby a particularly suitable preparation for the subsequent disinfection is formed. For example, the disinfecting gas is ozone or else also chlorine dioxide or possibly ethylene oxide.

The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it: 1 is a schematic diagram of a dental treatment and / or examination unit according to the application,

Fig. 2 is a further sketch of this, in an embodiment with several

instruments

Fig. 3 is a, the Fig. 2 corresponding sketch, but with a valve of

Means for introducing a disinfecting gas into the

Media supply line for the liquid is shown in one of the instruments open and

Fig. 4 is a sketch of a dental treatment and / or

Examination unit according to the prior art.

Fig. 1 shows a schematic diagram of a dental according to the application

Treatment and / or examination unit, here also referred to as "arrangement". Unless otherwise stated below, the arrangement may be as described above and illustrated with reference to FIG. 4, designed. In particular, the arrangement accordingly, as outlined in Fig. 4, a

Receiving device, for example in the form of a dentist element 110, which is in particular arranged movably on a support arm 117 of the arrangement, for example horizontally movable. The support arm 117 may be movably disposed on a base portion 112 of the assembly. Formed on the dentist element 110 is a holding device 115 for a coupling unit, which is designed to be connected to an instrument 102, for example via a device 102

Plug connection or a plug-in / slewing connection. The instrument 102 is designed for dental treatment and / or examination.

In the schematic diagram of FIG. 1, by way of example, a corresponding instrument - here provided with the reference numeral 2 - shown, as well as the holding device - provided here with the reference numeral 15. (The remaining dentist element is not sketched in FIG. 1). The instrument 2 is preferably provided by the aforementioned coupling unit, in FIG. 1 with the reference numeral 1 - with a particular flexible Supply hose 14 connected (corresponding to the outlined in Fig. 4

Supply hose 114). On the other hand, the supply hose 14 is preferably connected to the receiving device or the dentist element 110. According to the application, the arrangement has a supply unit 3 for providing supply media for the instrument 2. The supply media include air and a liquid, such as water. The supply unit 3 can be arranged, for example, in or on the receiving device or in or on the dentist element 110

As further sketched in FIG. 1, the arrangement also has media supply lines 4, 5 for conducting the air and the liquid from the supply unit 3 to the instrument 2. The arrangement can therefore in particular have a media supply line 4 for the liquid and a media supply line 5 for the air.

The Medienzuführleitungen 4, 5 can in particular by the

Supply hose 14 extend therethrough, preferably between the

Supply unit 3 on the one hand and the coupling unit 1 on the other hand is arranged. The media supply lines 4, 5 preferably extend into the

Coupling unit 1. In particular, the design is such that the

Media supply line 4 for the liquid from the coupling unit. 1

withdrawn instrument 2 opens via the coupling unit 1 in the outer space.

The media supply line 5 for the air is preferably connected to a corresponding air source 50, in particular in the form of a compressed air source. In the

Media supply line 5 for the air may be arranged - not shown in Fig. 1 - valve to release a flow of air or lock.

The media supply line 4 for the liquid is preferably with a

corresponding liquid source 40, in particular connected in the form of a water source. In particular, for this purpose, a feed line 45 can be provided, which connects the liquid source 40 with the medium supply line 4 for the liquid. Preferably, the liquid source 40 is a pressurized fluid source. In the supply line 45 may be arranged a - 41 sketched in Fig. - Valve 41, for example, as outlined, in the form of a 2/2-way valve to enable or block a flow of the liquid.

According to the application, the arrangement comprises means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid. Preferably, these means 6 are designed as a component of the supply unit 3. The disinfecting gas may be, for example, ozone. Also the

Use of chlorine dioxide or possibly ethylene oxide would be conceivable. Through a

Introducing the disinfecting gas in the liquid media line 4, the latter can be particularly suitable disinfect.

Preferably, the means 6 for introducing a disinfecting gas into the fluid medium supply line 4 are connected via a gas line 7 to a source 8 of the disinfecting gas. Preferably, this source 8 is a source of overpressure.

As in the embodiment shown, the means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid

Valve 11 for introducing the disinfecting gas into the medium supply line 4 for the liquid. Preferably, the valve 11 is arranged at the transition from the supply line 45 to the media supply line 4 for the liquid. The design is preferably such that the valve 11 is a first

Switching position and a second switching position, wherein in the first

Switching position - as outlined in Figure 1 - the flow of the liquid is released, in particular between the supply line 45 to the media supply 4 for the

Liquid. This first switching position thus serves for introducing the liquid into the medium supply line 4 for the liquid. The second switching position is used for

Introducing the disinfecting gas into the medium supply line 4 for the liquid. In this case, in particular in the second switching position, the flow of the liquid is blocked and blocked in the first switching position, the flow of the disinfecting gas. Thus, so can in the media supply 4 for the liquid as Alternative to the liquid, ie to the water, the disinfecting gas are introduced.

In particular, the valve 11 can advantageously be a 3/2-way valve for realizing the said function, as outlined in FIG. 1.

Further preferably, the means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid are also designed to introduce a further gas, in particular to introduce air. Preferably, the means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid via a further gas line 9 to a source 10 of the further gas are connected. The source 10 of the further gas may in particular be a compressed air source. The source 10 of the further gas can - structurally advantageous - be identical to the above-mentioned air source 50. However, two corresponding separate sources may also be provided; This is advantageous, for example, if two different overpressures are desired.

If the source 10 of the further gas is designed as an air pressure source, the liquid media supply line 4 can be pressurized with air and thus "blown through". Thus, any existing dirt particles or the like can be removed from the medium supply line 4 for the liquid; In this way, the media supply line 4 for the liquid can be prepared particularly suitable for flushing with the disinfecting gas. Preferably, the means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid are designed such that the second

Switching position of the valve 11 can also serve to introduce the other gas, either alternatively to introduce the disinfecting gas or in addition to introducing the disinfecting gas. For this purpose, the means 6 for introducing a disinfecting gas into the medium supply line 4 for the liquid preferably have one connected to a connection 12 of the valve 11

Gas line section 13, wherein the means 6 are designed such that in the gas line section 13 optionally the disinfecting gas or the further gas or the disinfecting gas and at the same time the further gas can be introduced. As a result, the possibilities for disinfection are fundamentally improved.

In the embodiment shown in FIG. 1, a valve 71 is disposed between the gas line 7 and a first branch 131 of the gas line section 13 for this purpose

Flow of the disinfecting gas locks or releases, preferably in the form of a 2/2-way valve. Between the further gas line 9 and a second branch 132 of the gas line section 13, a corresponding further valve 91 is arranged, which blocks or releases the flow of the further gas, preferably in the form of a 2/2-way valve.

Preferably, a first check valve 133 is disposed between the first branch 131 of the gas line section 13 and the remaining gas line section and a second check valve 134 between the second branch 132 of the gas line section 13 and the remaining gas line section. By means of these check valves 133, 134, it is possible to prevent the disinfectant Gas unintentionally flows into the second branch 132 of the gas line section 13 or the further gas into the first branch 131 of the gas line section 13. FIG. 2 shows a schematic diagram of an embodiment according to the application, in which a plurality of instruments 2, 2 'are provided , Unless otherwise stated, the above statements apply analogously below.

For each of the instruments in each case a Medienzuführleitung 4, 4 'is provided for the liquid and for each of these Medienzuführleitungen 4, 4' one, the valve 11 corresponding valve 11, 1 G.

In this case, advantageously, the feed line 45 connected to the liquid source 40 can be designed divided into a plurality of arms 451, 45 G, each of the arms 451, 45 G being respectively connected to exactly one of the media feed lines 4, 4 '. Preferably, in each case one valve 46, 46 'is provided in each of the arms 451, 45G in order to enable or block the flow of the liquid originating from the liquid source 40 in the relevant arm 451, 45 G. Fig. 3 shows the sketched in Fig. 2 arrangement, but with the valve 11 - in contrast to the position shown in Fig. 2 - is in the second switching position. Thus, the disinfecting gas can be introduced via the connection 12 of the valve 11 into the relevant media supply line 4 for the liquid, which leads to the corresponding instrument 2, for disinfecting this media supply line 4.

An according to the application method for disinfecting the liquid media line 4 comprises sequentially the following steps: a) rinsing the

B) introducing the disinfecting gas into the media supply line 4. By flushing in step a), the liquid media line 4 can be cleaned, whereby the media line 4 is well prepared for the following disinfection.

Referring to FIG. 1, in step a), preferably, the valve 11 is in the first switching position, so that the water originating from the liquid source 40 can flow through the valve 11 for purging the fluid media supply line 4. In step b), the valve 11 is preferably in the second switching position, so that the gas originating from the source 8 of the disinfecting gas is passed through the valve 11 into the medium supply line 4 for the liquid.

Temporarily between the two mentioned steps a) and b) is preferably still the following third step c) introducing compressed air into the medium supply line 4 for the liquid. For this purpose, preferably the valve 71 is in the locked position, so that no disinfecting gas from the source 8 of the disinfecting gas enters the gas line section 13. The valve 91 is preferably in the passage position, so that compressed air from the, here as compressed air source 10th

designed source 10 of the other gas enters the gas line section 13. The valve 11 is in the second switching position, so that the compressed air is introduced from the gas line section 13 in the medium supply line 4 for the liquid.

The blowing through of the medium supply line 4 for the liquid also serves for a suitable preparation for the subsequent disinfection. This happens according to the invention then exclusively by the disinfecting gas. On the one hand the effect of the disinfection is increased, on the other hand, the gas can easily be completely removed from the piping system, so that there is no risk of disturbing and possibly the cleaning effect impairing residues.

Alternatively, in step c), the blowing or blowing can also take place with the aid of the disinfecting gas.

In principle, the following can also be provided: The valve 11 is in the second switching position, the valve 71 in the forward position and also the valve 91 is in the forward position. In this case, the second switching position of the valve 11 can serve to introduce both the disinfecting gas and the further gas into the media supply line 4. For example, a pulsed alternating supply of both gases can be provided here. A simultaneous feeding of both gases would be conceivable, which then have to have the same pressure.

In practice, for example, the following procedure can be followed: At the end of a

Treatment or examination, the instruments used 2, 2 'stored in their respective holding device. Then, a first of the instruments 2, 2 'is removed and held over a spittoon, a cup or the like of the arrangement. Then, the method steps a) and b) optionally also c) are carried out for this instrument 2. Between steps c) "blowing through" and b) "disinfecting", the instrument 2 can be withdrawn from the coupling unit 1 and subsequently - as known from the prior art - processed.

After or alternatively also before carrying out step b) "disinfecting", the coupling unit 1 with the supply hose 14 fastened thereto can be returned to the holding device 15.

This procedure can be described below for each of the further instruments 2 '.

be carried out accordingly. When the assembly is switched off, the disinfecting gas may remain in the media supply line 4 or in the media supply lines 4, 4 ', for example during a stagnation time overnight. If the arrangement is switched on at the beginning of the operation, a re-flooding of the media supply lines 4, 4 'can be carried out with the disinfecting gas. In the subsequent use of the instrument 2, the drive is preferably activated with a time delay to ensure that the water is applied to the relevant instrument 2, 2 '.

Claims

claims

1. Dental treatment and / or examination arrangement, comprising:

a supply unit (3) for providing supply media for an instrument (2) for dental treatment and / or examination, the supply media comprising at least air and a fluid,

- Media supply lines (4, 5) for guiding the air and the liquid from the supply unit (3) to the instrument (2), and

- means (6) for introducing a disinfecting gas in the

Media supply line (4) for the liquid

characterized

the treatment and / or examination arrangement is designed to sequentially first supply the liquid and subsequently the disinfecting gas into the medium supply line (4) for the liquid.

2. Dental treatment and / or examination arrangement according to claim

1,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid as a part of

Supply unit (3) are configured.

3. Dental treatment and / or examination arrangement according to claim 1 or 2,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid via a gas line (7) with a source (8) of the disinfecting gas are connected.

4. Dental treatment and / or examination arrangement according to one of the preceding claims,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid continue to introduce a further gas, in particular for the introduction of air are configured, wherein preferably the introduction of the further gas between the introduction of the liquid and the introduction of the disinfecting gas.

5. Dental treatment and / or examination arrangement according to claim

4,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid via a further gas line (9) with a source (10) of the further gas are connected.

6. Dental treatment and / or examination arrangement according to claim

5,

characterized,

the source (10) of the further gas is designed to deliver the additional gas with an overpressure, in particular as an air pressure source.

7. Dental treatment and / or examination arrangement according to one of the preceding claims,

characterized,

that the disinfecting gas is ozone.

8. Dental treatment and / or examination arrangement according to one of the preceding claims,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid, a valve (11) for introducing the disinfecting gas into the medium supply line (4) for the liquid.

9. Dental treatment and / or examination arrangement according to claim

8th,

characterized,

the valve (11) has a first switching position and a second switching position wherein the first switching position is for introducing the liquid into the medium supply line (4) for the liquid and the second switching position for introducing the disinfecting gas into the medium supply line (4) for the liquid.

10. Dental treatment and / or examination arrangement according to claim 9 with the features mentioned in claim 4,

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) are designed for the liquid such that the second

Switching position alternatively or additionally used for introducing the other gas.

11. Dental treatment and / or examination arrangement according to claim

10

characterized,

in that the means (6) for introducing a disinfecting gas into the

Media supply line (4) for the liquid one, with a connection (12) of the valve (11) connected gas line section (13), wherein the means (6) are designed such that in the gas line section (13) optionally the disinfecting gas or further gas or the disinfecting gas and at the same time the further gas can be introduced.

12. Dental treatment and / or examination arrangement according to one of the preceding claims,

characterized,

in that the media supply lines extend into a coupling unit (1) which is designed to be connected to the instrument (2),

preferably via a plug connection or a plug / rotary connection.

13. Dental treatment and / or examination arrangement according to claim

12

characterized,

that the media supply lines by a particular flexible

Supply hose (14) extending between the supply unit (3) on the one hand and the coupling unit (1) on the other hand is arranged.

14. Dental treatment and / or examination arrangement according to claim 12 or 13,

marked by

- A receiving device, in particular in the form of a so-called

Dentist element, with a holding device (15) for the coupling unit (1), wherein the Aufhahmevorrichtung is preferably arranged horizontally movable held on a support arm of the treatment and / or examination arrangement.

15. Dental treatment and / or examination arrangement according to claim

14

characterized,

the supply unit (3) is arranged in the receiving device.

16. A method for disinfecting a fluid supply medium line (4) of a dental treatment and / or examination arrangement,

wherein the treatment and / or examination arrangement a

Supply unit (3) for providing supply media for a

Instrument (2) for dental treatment and / or examination, wherein the supply media comprise at least air and a liquid and wherein media supply lines (4, 5) for conducting the air and the

Liquid from the supply unit (3) to the instrument (2) are configured,

characterized,

in that the method for disinfecting the fluid medium supply line (4) comprises the following steps:

a) rinsing the media supply line (4) for the liquid with water and below

b) introducing a disinfecting gas in the medium supply line (4) for the liquid.

17. V experienced according to claim 16,

characterized,

that, after rinsing with water and before introducing the disinfecting gas, it has the additional step:

c) introducing compressed air into the medium supply line (4) for the liquid.

18. The method according to claim 16 or 17,

characterized,

that the disinfecting gas is ozone