Abstract:
A medical or dental treatment device for use in an oral or dental procedure, comprises a base part with a power supply unit and an electrical or electronic control device and a set of different parts for use with the base part. The set of different parts comprises at least one delivery part for a first treatment phase and comprising a sound or ultrasound source, a movable piston and a piston operating element operable to deliver a substance from the delivery part to a treatment site, and at least one active part for use in a second treatment phase to act on the treatment site. The active part comprises a sound source, an ultrasound source and/or an electromagnetic radiation source. The delivery part and the active part are selectively connectible to the base part for use in consecutive treatment phases (the first can precede or follow the second).

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    The present application is a continuation of U.S. patent application Ser. No. 12/955,879, filed Nov. 29, 2010, which claims priority from pending European Patent Application No. 09178643.4 filed Dec. 10, 2009, which are incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    1. Field 
         [0003]    The present invention relates to a medical or dental treatment device for dispensing a medium. 
         [0004]    2. Description of Prior Art 
         [0005]    Such a treatment device is known from U.S. Pat. No. 7,014,462 B1. The disadvantage of this treatment device is that during operation, the treatment device offers the user very little or no flexibility with respect to different applications or different media to be dispensed. 
         [0006]    It would be advantageous to create a medical or dental treatment device for dispensing a medium, which offers the user more opportunities for selecting operating parameters for specific applications or for configuring the treatment device for media having different properties. 
       SUMMARY 
       [0007]    According to one embodiment, the medical or dental treatment device for dispensing a medium has a base part with a power supply unit and an electrical or electronic control device and at least one delivery part that can be connected detachably to the base part via a coupling device and comprises a sound source, in particular an ultrasound source, and a delivery device for dispensing the medium from the delivery part. According to a preferred embodiment, the treatment device has multiple delivery parts comprising in particular different sound sources. The different sound sources generate different vibrational amplitudes or vibration frequencies or they output different powers, so that the user can connect the delivery part having the suitable sound source to the base part, depending on the application or the medium to be dispensed. 
         [0008]    According to an alternative embodiment, the treatment device has at least one active part which can be connected detachably to the base part via the coupling device and can be connected instead of the delivery part to the base part. The at least one active part (in contrast with the delivery part) does not have a delivery device for dispensing a medium. Preferably at least one delivery part and at least one active part are used together in one application but in chronological succession. According to an especially preferred embodiment, the active part is used for acting on the medium dispensed by the delivery part. “Acting on the medium” is understood in particular to refer to a chemical, physical, thermal, mechanical or electromagnetic action, processing or activation. 
         [0009]    According to one embodiment, the treatment device is designed as a wireless (i.e., cordless) handpiece, and the power supply unit is designed as a battery or an accumulator. Alternatively, the treatment device can comprise a hardwired handpiece, a power supply line and a control unit and/or supply unit, which can be connected to the handpiece via the power supply line. 
         [0010]    According to another embodiment, the base part has a handle section, in particular a pistol-shaped handle section, which holds at least a portion of the power supply unit and/or the electrical or electronic control device. Alternatively, the treatment device is designed as a straight or contra-angle handpiece having a base part and at least one delivery part, as described above. 
         [0011]    The sound source, in particular the ultrasound source, is designed as a pneumatic sound source, a piezoelectric sound source or a magnetostrictive sound source, for example. 
         [0012]    The delivery device has, for example, a movable or displaceable piston and an operating element for selective movement of the piston. The operating element is designed as a mechanical operating element in particular, for example, as a movable or pivotable lever or as an electrically operable operating element for example, as a button. 
         [0013]    The media that can be dispensed and delivered by the treatment device comprise, for example, a filling material for dispensing into a cavity, in particular a dental cavity, a filling material for dispensing into a dental root, a rinsing agent or disinfecting agent for dispensing into a dental root or an anesthetic for intraosseous dispensing, in particular into a jawbone. 
         [0014]    According to one embodiment, the at least one delivery part has a receptacle for the medium or a connection for a media container and a sonotrode for transferring the vibrations generated by the sound source, in particular the ultrasound source, to the medium, the receptacle and/or the connection. Thus, especially good deliverability, distribution of the medium in the target region (or activation of the medium) is achieved in an advantageous manner. 
         [0015]    According to one embodiment, the at least one delivery part has a radiation source for dispensing a radiation which activates the medium. According to one other embodiment, the at least one delivery part has a tool for the medium, in particular a modeling probe, an intraosseous needle or a root canal probe and a sonotrode for transferring the vibrations generated by the sound source, in particular the ultrasound source, to the tool. According to another embodiment, the at least one delivery part is provided with a heat source for heating the medium. These embodiments increase the functionality of the treatment device and the user friendliness because the user can perform multiple treatment steps by using one delivery part. 
         [0016]    As already described above, the treatment device according to one embodiment has at least one active part, which can be connected detachably to the base part via the coupling device and can be connected instead of the delivery part to the base part. The advantage of this embodiment is that due to the use of multiple different active parts in particular, the functionality of the treatment device is further increased. For example, multiple active parts having different radiation sources may be made available, wherein each radiation source emits a different radiation, for example, each having a specific wavelength and/or power. Alternatively, dental filling material dispensed onto teeth may be modeled and/or compressed, depending on requirements, by means of multiple active parts each of which has a modeling probe with an individually shaped modeling section, for example. 
         [0017]    According to one embodiment, the at least one active part is designed to act on the medium dispensed by the delivery part. The at least one active part therefore comprises, for example, a radiation source for dispensing a radiation activating the medium and/or a tool for the medium dispensed, in particular a modeling probe or an obturation needle and/or a sound source, in particular an ultrasound source for transferring vibrations to the tool and/or a heat source for heating the medium. 
         [0018]    According to an alternative embodiment, the at least one active part is designed to act on the treatment site, onto which the delivery part has dispensed or will dispense the medium. The at least one active part therefore comprises, for example, a tool for preparation of the root canal and preferably a sound source, in particular an ultrasound source for transferring vibrations to the tool. 
         [0019]    The medical or dental treatment device may be used for various different applications, for example: 
         [0020]    for dispensing filling material into a cavity, in particular a dental cavity; 
         [0021]    for acting on the filling material dispensed by the delivery part into the cavity, in particular for irradiating the filling material and/or for compacting and/or modeling the filling materials; 
         [0022]    wherein preferably in both applications cited above, a filling material in which a change in viscosity is achieved by acting upon the filling material with sound or ultrasound and/or heat is used, for example, a dental cement or a filling compound based on a synthetic resin, preferably a filling compound based on a synthetic resin, which can be polymerized or cured by light, in particular a highly viscous dental filling compound based on a synthetic resin and having a high inorganic filler content; 
         [0023]    for dispensing filling material into a dental root; 
         [0024]    for acting on the filling material dispensed by the delivery part into the dental root, in particular for heating and/or compressing and/or modeling the filling material; 
         [0025]    wherein preferably in the two latter applications, a filling material in which a change in viscosity is achieved by exposing the filling material to sound or ultrasound and/or heat is used, for example, a dental cement or gutta-percha; 
         [0026]    for dispensing a rinsing agent or disinfecting agent into a dental root with the additional use of a root canal probe; alternatively, a medical or dental treatment device may be used for this application, comprising a sound source, in particular an ultrasound source, a delivery device for dispensing a medium and a root canal probe; 
         [0027]    wherein for this latter application, the root canal probe is preferably designed as a hollow probe connectable to the delivery device, and especially preferably vibrations created by the sound source, in particular the ultrasound source, are transmitted directly or indirectly to the rinsing agent or disinfecting agent, in particular via the root canal probe, to activate the rinsing agent or disinfecting agent; 
         [0028]    for expanding a dental root canal; alternatively, a medical or dental treatment device, comprising a sound source, in particular an ultrasound source, may be used for this application; 
         [0029]    wherein for this latter application the treatment device especially preferably has a dental file, in particular a diamond-tipped dental file; 
         [0030]    for intraosseous dispensing of an anesthetic, in particular into a jawbone, with additional use of an intraosseous needle; alternatively, a medical or dental treatment device, comprising a sound source, in particular an ultrasound source, a delivery device for dispensing a medium and an intraosseous needle may be used for this application. 
         [0031]    The individual applications mentioned here may be performed by means of a delivery part and/or by means of an active part. 
         [0032]    Several of the applications mentioned above may preferably be combined to achieve a particularly time- and cost-effective treatment. During such a treatment, two or more delivery parts or at least one delivery part and at least one active part are especially preferably used together in succession. An embodiment of such a combined application is as follows: First, a delivery part having a sound source and a delivery device by means of which filling material is dispensed into a dental cavity is connected to the base part. Then, the delivery part is detached from the base part and the latter is connected to a first active part having a modeling probe, which is connected in particular to a sound source and acts on the filling material dispensed by the delivery part into the cavity by modeling and/or compressing the filling material. After compressing or modeling the filling material, the first active part is released from the base part and the base part is connected to a second active part having a radiation source in order to irradiate the filling material and cure it. Alternatively, only one active part is provided, comprising a modeling probe connected to a sound source in particular and a radiation source. 
         [0033]    Another embodiment of a combination of several of the above-mentioned applications of the treatment device for a dental root canal treatment comprises the following steps: A borehole is created in the jawbone by transferring the vibrations of the sound source to the needle by means of a first delivery part connected to the base part and provided with an intraosseous needle and having a sound source connected to the needle. Next, an anesthetic is dispensed through the hollow intraosseous needle into the borehole and the jawbone by means of the delivery device of the first delivery part. Then, the first delivery part is detached from the base part. In a subsequent step, a first active part is connected to the base part, the first active part having a sound source and a tool connected thereto for processing the root canal, in particular a diamond-tipped file. Thus, a dental root canal that has previously been opened is expanded. In a further step, the base part is connected to a second delivery part, which is provided with a root canal probe and has a sound source and a delivery device for a rinsing agent or a disinfecting agent. With the help of the delivery device, the rinsing agent or the disinfecting agent is introduced into the root canal and is activated by means of the vibrations generated by the sound source and transferred by the root canal probe. A third delivery part which is subsequently connected to the base part has a delivery device, a sound source and optionally a heat source and serves to deliver a filling material, in particular gutta-percha, into the root canal. Then, a further active part is connected to the base part, which has a heat source and a tool to distribute, to compress or to model the gutta-percha dispensed into the root canal and/or an additional active part comprising a tool, for example, an obturation needle and a sound source, is connected to the base part, so that the vibrations transferred to the obturation needle distribute, compress or model the gutta-percha, or an active part which comprises a heat source and a tool and a sound source connected to the tool is connected to the base part in order to distribute, compress or model the gutta-percha. It is of course also possible to design a delivery part so that it can dispense different media so that for example, in the application described above instead of three delivery parts only two or even only one delivery part is needed. 
         [0034]    The invention is explained in greater detail below on the basis of preferred embodiments and with reference to the accompanying drawings: 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0035]      FIG. 1  shows an outside view of an embodiment of a medical or dental wireless treatment device for dispensing a medium, having a base part and a delivery part. 
           [0036]      FIG. 2  shows a sectional diagram through the base part of the treatment device from  FIG. 1 . 
           [0037]      FIG. 3  shows an embodiment of a base part with an interface for connection of a delivery part or an active part. 
           [0038]      FIG. 4  shows an embodiment of a delivery part with an interface for connection to the base part. 
           [0039]      FIG. 5  shows an outside view of an embodiment of a delivery part. 
           [0040]      FIG. 6-9  show sectional diagrams through four different embodiments of delivery parts having media containers connected thereto. 
           [0041]      FIG. 10  shows an outside view of an embodiment of a medical, in particular dental treatment device for dispensing a medium having a base part and an active part. 
           [0042]      FIG. 11  shows a sectional diagram through the active part of the treatment device from  FIG. 10 . 
           [0043]      FIG. 12  shows an outside view of an alternative embodiment of a medical, in particular dental treatment device for dispensing a medium having a base part and an active part. 
           [0044]      FIG. 13  shows a sectional diagram through the active part of the treatment device of  FIG. 12 . 
           [0045]      FIGS. 14-16  shows sectional diagrams through three different embodiments of active parts. 
           [0046]      FIG. 17  is a drawing showing the interoperability of multiple different parts, including a first set of delivery parts and a second set of active parts, with a base part of the medical or dental treatment device. 
       
    
    
     DETAILED DESCRIPTION 
       [0047]    The treatment device  1  shown in  FIGS. 1-16  is designed as a wireless, pistol-shaped handpiece having an outer sleeve  18 , a base part  2  and multiple delivery parts  6 - 6 E and active parts  13 A- 13 E which can be connected to the base part  2  (see  FIG. 17  for a diagrammatic depiction of the interoperability of the different parts with the base part). The connection between the base part  2  and the delivery parts  6 - 6 E or the active parts  13 A- 13 E is accomplished via a coupling device  5 . The coupling device  5  comprises coupling elements  5 A,  5 B that are provided on the base part  2  and on the delivery parts  6 - 6 E or on the active parts  13 A- 13 E and can be interconnected. 
         [0048]    The base part  2  comprises a handle section  2 A and an extension  2 B, which is arranged thereon at an angle, wherein the two are connected to one another by means of a central section  2 C. The handle section  2 A is designed to be hollow and holds an electrical or electronic control device  4  in its interior, comprising in particular at least one electrical or electronic component, for example, a circuit, a microcomputer, a microcontroller, a circuit board or a memory element. The control device  4  serves to control and/or regulate the treatment device  1  and the operating parameters and/or for storage of operating data or treatment data, operating or treatment sequences or cleaning data. According to one embodiment, the control device  4  is designed to recognize delivery parts  6 - 6 E or active parts  13 A- 13 E that can be connected to the base part and in particular to select at least one specific operating parameter for the respective connected delivery part  6 - 6 E or active parts  13 A- 13 E and to operate the connected delivery part  6 - 6 E or active parts  13 A- 13 E according to this operating parameter. 
         [0049]    According to another embodiment, the control device  4  is designed to cooperate with one or more adjusting means and/or display devices provided on the treatment device  1  and to accomplish a unidirectional or bidirectional signal exchange or data exchange between the control device  4  and the adjusting means and/or the display devices. The control device is therefore connected, for example, to a switching element  19  ( FIGS. 2 ,  3 ), which is switched via a mechanical or electrical adjusting element, for example, a lever  20 , a trigger  21  or a button. For example, the treatment device  1  is activated or deactivated by operation of the adjusting element. 
         [0050]    The protrusion  2 B of the base part  2  is also designed to be hollow and holds a power supply unit  3 , for example, a battery or an accumulator. To gain access to the power supply unit  3 , the protrusion  2 B has a cover which is detachable from the remaining protrusion. 
         [0051]    The power supply unit  3  of the protrusion  2 B and the control device  4  of the handle section  2 A are connected to one another via electrical lines, wherein the lines run in a line duct  22 , which connects the interiors of the protrusion  2 B and the handle section  2 A. 
         [0052]    The central section  2 C of the base part  2  has a receptacle  23 , which can hold at least a part of the delivery part  6 - 6 E and/or of an active part  13 A- 13 E, in particular that part of delivery part  6 - 6 E and/or active part  13 A- 13 E on which the coupling element  5 B is provided. The receptacle  23  is additionally preferably designed so that a part of the lever  20  or of the trigger  21  or a component operatively connected thereto can also be held therein to operate the switch element  19  arranged in the base part  2 . The receptacle  23  comprises a receptacle opening  23 A for a delivery part  6 - 6 E and/or an active part  13 A- 13 E and has at least one wall on which the coupling element  5 A of the base part  2  is arranged. The coupling element  5 A in particular is provided on the wall opposite the receptacle opening  23 . 
         [0053]    The coupling element  5 A comprises multiple electrical contacts  24 A, for example, four electrical contacts, which are connected to the power supply unit  3 . Two of these contacts  24 A serve to supply power to an electrical consumer of a delivery part  6 - 6 E or of an active part  13 A- 13 E, for example, an electrically operated sound source or ultrasound source  7 ,  17 , of an electrically operated heat source  16  or an electrically operated light source or radiation source  14 . Accordingly, multiple, in particular four, electrical mating contacts  24 B are provided on each coupling element  5 B of a delivery part  6 - 6 E or an active part  13 A- 13 E, such that when the coupling elements  5 A,  5 B are coupled to one another, the contacts  24 A make contact and close the circuit between the power supply unit  3  and the electrical consumers by means of electrical lines. The coupling device  5  is preferably designed as a plug coupling having protrusions or pins on one coupling element  5 A,  5 B and receptacles or bushings for the protrusions on the other coupling element  5 A,  5 B, wherein the electrical contacts  24 A,  24 B especially preferably form the protrusions, pins, receptacles or bushings or are arranged therein. However, the coupling device  5  may of course also include other known couplings, for example, bayonet couplings or screw couplings. 
         [0054]    In addition, an anti-rotation device, which prevents rotation of a delivery part  6 - 6 E or an active part  13 A- 13 E connected to the base part  2  relative to the base part  2  is provided on the coupling device  5 . The anti-rotation device is preferably designed as a plug device, which in particular has a protrusion  25 B and a setback  25 A to receive the protrusion  25 B. The protrusion  25 B and the setback  25 A are each provided on one of the two coupling elements  5 A,  5 B. 
         [0055]    The delivery parts  6 B- 6 E shown in  FIGS. 6-9  each comprise a sound source or an ultrasound source  7 , which is designed in particular as a piezoelectric, magnetostrictive or pneumatic sound source  7 , a delivery device  8  for dispensing a medium from the delivery parts  6 B- 6 E, a receptacle for the medium or a connection  10  for a media container  11 B- 11 E and a sonotrode  9  for transferring the vibrations generated by the sound source  7  to the medium, the receptacle and/or the connection  10 . 
         [0056]    Depending on the application provided, the delivery parts  6 B- 6 E have different features, or certain components of the various delivery parts  6 B- 6 E have specific designs: 
         [0057]    The delivery part  6 B shown in  FIG. 6  is used to dispense filling material into a dental cavity, in particular filling material, in which a change in viscosity is achieved by subjecting it to sound or ultrasound and/or heat; this filling material may be, for example, a dental cement or a filling compound based on a synthetic resin, preferably a filling compound based on a synthetic resin, which can be polymerized or cured by light, in particular a highly viscous dental filling compound based on a synthetic resin and having a high inorganic filler content. The change in viscosity is achieved by the transfer of vibrations generated by the sound source  7  to the filling material via the sonotrode  9 . 
         [0058]    The filling material is contained in a media container  11 B, which is inserted into the receptacle  10  of the delivery part  6 B. The vibrations generated by the sound source  7  are preferably also transferred directly or indirectly, for example, via the filler material, to the media container  11 B, in particular to its dispensing nozzle  26 . The receptacle  10  is preferably detachable from the delivery part  6 B. 
         [0059]    The sound source  7  comprises multiple piezoelectric elements, which are connected at one end to the sonotrode  9  and at another end to a vibrating mass or counterweight  27 . The counterweight  27  is surrounded by a sliding sleeve  29 . 
         [0060]    The delivery device  8  comprises the sonotrode  9 , which is arranged displaceably in the delivery part  6 B, and the operating element, designed in particular as a lever  20 , by means of which the sonotrode  9  can be displaced within the delivery part  6 B in relation to the receptacle  10 . The lever  20  is pivotably attached to the delivery part  6 B and has a tappet  28  on its end arranged in the interior of the delivery part  6 B, which, when the lever  20  is operated, displaces the sliding sleeve  29  and the sound source  7  including the counterweight  27  and the sonotrode  9  in the direction of the receptacle  10 . Therefore, the sonotrode  9  puts the filler material under pressure or displaces it out of the delivery part  6 B. In particular at its free front end, the sonotrode  9  penetrates into the receptacle  10  and/or contacts and displaces a movable plug of the media container  11 B, so that the filler material is conveyed out of the delivery part  6 B. The conveyance of the filling material is preferably accomplished simultaneously with the application of vibrations from the sound source  7  to the filling material via the sonotrode  9 . A spring  30  serves to restore the sliding sleeve  29  and the sound source  7  including the counterweight  27  and the sonotrode  9  in the direction of the coupling element  5 B as soon as the user releases the lever  20 . 
         [0061]    The delivery part  6 C illustrated in  FIG. 7  is used to dispense a rinsing fluid or a disinfecting fluid into a root canal. The structure of the delivery device  8  and of the sound source  7  is the same as that of the delivery part  6 B of  FIG. 6 . 
         [0062]    The delivery part  6 C has a connection  10  for a media container or an ampoule  11 C, in which the rinsing fluid or disinfecting fluid is stored. The tool  12  is designed as a hollow root canal probe  12 C, which can be connected to the delivery device  8 , so that rinsing fluid or disinfecting fluid delivered by the delivery device  8  can be dispensed through the probe  12 C into the dental root. In addition, the root canal probe  12 C can be connected to the sound source  7 , so that vibrations generated by the sound source  7  can be transferred via the root canal probe  12 C to the rinsing agent or disinfecting agent to activate the rinsing agent or disinfecting agent and/or to distribute and/or mix it in the dental root. The vibrations are transferred from the sonotrode  9  to the root canal probe  12 C, for example, via the connection  10  and/or the ampoule  11 C, in particular via the ampoule wall  31  and/or the connecting piece  32  between the ampoule and the root canal probe  12 C and/or via the rinsing fluid or disinfecting fluid. The vibrations generated by the sound source  7  are also transferred directly to the rinsing agent or disinfecting agent via the sonotrode  9 . 
         [0063]    According to an alternative embodiment, the delivery part  6 C does not have an ampoule for the rinsing fluid or disinfecting fluid but instead is provided with a supply line, which conducts the rinsing fluid or disinfecting fluid to or through the delivery part  6 C from a rinsing fluid source or a disinfecting fluid source situated outside of the delivery part  6 C. 
         [0064]    According to this alternative embodiment, the delivery part  6 C also includes a sound source  7 , which is connected to the root canal probe  12 C, in particular via the supply line, to transfer vibrations to the root canal probe  12 C and the rinsing fluid or disinfecting fluid. 
         [0065]    The delivery part  6 D illustrated in  FIG. 8  serves to dispense filling material into a dental root, in particular a filling material in which a change in viscosity is achieved by acting upon it with sound or ultrasound and/or heat; this filling material may be for example a dental cement or gutta-percha. The structure of the delivery device  8  and the sound source  7  is similar to that of the delivery part  6 B in  FIG. 6 , wherein both the transfer of vibrations and the delivery of the filling material in particular are accomplished by the displaceable sonotrode  9 . 
         [0066]    The media container  11 D for the filling material is designed as a cartridge, which has a tool  12  in the form of an elongated tube, in particular a tube that is bendable or plastically displaceable, by means of which the filling material is dispensed into the dental root. The sonotrode  9  transfers the vibrations of the sound source  7  to the filling material and also to the media container  11 D, in particular to the tube  12 , preferably directly or indirectly via the filling material, for example. 
         [0067]    Alternatively or in addition to the sound source  7  and the sonotrode  9 , the delivery part  6 D for dispensing filling material into a dental root may also have a heat source and a heat conductor. The heat conductor transfers the heat generated by the heat source to the filling material, so that its viscosity is reduced and it can be conveyed better through the delivery device  8 . The heat source preferably comprises an electrical heating element. 
         [0068]    The delivery part  6 E illustrated in  FIG. 9  is designed as an intraosseous handpiece, with which a borehole can be produced in a bone, in particular in a jawbone, to allow the injection of an anesthetic. The delivery part  6 E has an outer sleeve  36 , a sound source  7 , in particular an ultrasound source, and a sonotrode  9 , wherein the sonotrode  9  is not displaceable. The sound source  7  can be turned on and off by means of the trigger  21  or a pushbutton. The delivery part  6 E can be connected to a tool  12  in the form of an intraosseous needle  12 E, wherein the sonotrode  9  is designed and arranged on the delivery part  6 E so that it transfers the vibrations generated by the sound source  7  onto the needle  12 E. The sonotrode  9  may come in direct contact with the cannula of the needle  12 E, for example, or may transfer the vibrations to a cannula apron or to a receptacle of the delivery part  6 E, in which the needle  12 E is accommodated. The cannula of the needle  12 E provided with a tip and in particular with one or more cutting edges may thus be induced to vibrate, so that it penetrates into a bone, in particular a jawbone, when placed thereon, and creates a borehole. 
         [0069]    In addition, the delivery part  6 E has an elongated receptacle  10  for a media container in the form of ampoule  11 E with the anesthetic. The delivery device  8  which is connected to the receptacle  10  comprises a displaceable rack  33  and a lever  34  with a pawl  35 , which engages at its free end in the row of teeth of the rack  33 . The rack  33  is surrounded by a protective sleeve  38  having a slot at one end, through which a handle piece  39  connected to the rack  33  protrudes. A filling level indicator for the filling level of the ampoule  11 E in the form of a scale, for example, is preferably provided on the protective sleeve  38 . 
         [0070]    The lever  34  is rotatably or pivotably attached to the delivery part  6 E. By moving the lever  34  in the direction of the receptacle  10 , the pawl  35  pushes the rack  33  in the direction of the ampoule  11 E. When the front end of the rack  33  comes in contact with a plug  37  of the ampoule  11 E, it displaces the plug  37  in the direction of the needle  12 E, so that the anesthetic is forced out of the ampoule  11 E. If the lever  34  is moved away from the receptacle  10 , the pawl  35  is also pulled backward, away from the needle  12 E, so that it engages on another tooth of the rack  33 . 
         [0071]    The lever  34  and the trigger  21  can be operated independently of one another, so that either only vibrations are transferred to the intraosseous needle  12 E with the delivery part  6 E or only anesthetic is delivered or anesthetic is delivered and dispensed and vibrations are transferred to the intraosseous needle  12 E simultaneously. 
         [0072]      FIGS. 10-16  show different embodiments of active parts  13 A- 13 E. All these active parts  13 A- 13 E can be connected via the coupling device  5 ,  5 A,  5 B to the base part  2  from  FIG. 2 ; this is illustrated as an example in  FIGS. 10 and 12  for the active parts  13 A and  13 B. In addition, the interoperability of the multiple different active parts (as well as delivery parts) is shown diagrammatically with dashed lines in  FIG. 17 . Depending on the intended application, the active parts  13 A- 13 E have different features or certain components of the active parts  13 A- 13 E have specific designs. In addition, the active parts  13 A- 13 E can be subdivided according to their application into a first group of active parts for acting on the medium dispensed by a delivery part  6 - 6 E and a second group of active parts for acting on the treatment site, to which a delivery part  6 - 6 E has dispensed or will dispense a medium. The first group comprises, for example, the active parts  13 A,  13 B,  13 D,  13 E, and the second group comprises the active part  13 C. 
         [0073]    The active part  13 A shown in  FIGS. 10 and 11  is used for obturation of root canals and for shaping, modeling or compressing filling material dispensed into the root canal. It has a tool  15  in the form of an obturation needle  15 A, which is detachably or undetachably connected to the active part  13 A. Two electrical lines  40  supply electrical current to a heat source  16 , preferably arranged in the interior of the outer sleeve  41 . The heat source  16 , comprising in particular an electrical heating element, is connected to the tool  15  or is designed as part of the tool  15 , so that the tool  15  can be heated by the heat source  16 . The tool  15  transfers heat to the filling material to reduce the viscosity thereof. The heat source  16  can be turned on and off by means of a pushbutton or trigger  21  and preferably also the temperature of the obturation needle  15 A can be preset through the pushbutton or trigger  21 . 
         [0074]    The active part  13 E shown in  FIG. 16  also serves to obdurate root canals and to shape, model or compress the filling material dispensed into the root canal. It has a sound source  17 , in particular an ultrasound source. According to one embodiment, the sound source  17  has the same design as the sound source  7  of the delivery part  6 - 6 E and comprises a piezoelectric, magnetostrictive or pneumatic sound transducer  42 , a counterweight  43  and a sonotrode  44 . The sonotrode  44  is detachably or undetachably connected to the tool  15 , in particular an obturation needle  15 E, so that the vibrations generated by the sound source  17  can be transferred to the tool  15  and to the filling material. Due to the application of vibrations on the filling material according to a preferred embodiment, its viscosity is reduced. The sound source  17  can be turned on and off by means of a pushbutton or the trigger  21 , wherein preferably also at least one operating parameter of the sound source  17 , for example, the frequency or the power, can be preset through the pushbutton or trigger  21 . 
         [0075]    It is of course also possible to create an active part for obturation of root canals and for shaping, modeling or compressing filling material dispensed into the root canal which is a combination of the two active parts  13 A and  13 E and has a sound source  17  and a heat source  16 . 
         [0076]    The active part  13 B shown in  FIGS. 12 and 13  is used for dispensing electromagnetic radiation, in particular for dispensing radiation onto a filling compound based on a synthetic resin, which can be polymerized or cured by the action of light, in particular a highly viscous dental filling compound based on synthetic resin and having a high inorganic filler content. 
         [0077]    The active part  13 B has a connecting part  45 , an elongated neck part  46  and a head part  47  connected to it. A radiation source  14  is provided in the interior of the active part  13 B, in particular in the head part  47 . The radiation source  14  preferably has one or more optical semiconductor elements or light-emitting diodes (LEDs). Two electrical lines  48  supply electrical power to the radiation source  14 . The head part  47  has a radiation dispensing opening  49  through which the radiation generated by the radiation source  14  is dispensed and which is preferably sealed by a transparent safety glass  50 . Additional optical components, for example, lenses, mirrors, radiation conductors or reflectors for the radiation to be emitted, may be provided in the active part  13 B. A pushbutton or the trigger  21  serves to turn the radiation source  14  on and off. 
         [0078]    Alternatively, it is also possible for the radiation source to be arranged outside of the active part and for the active part thus not to have any radiation source or any electrical lines for supplying the radiation source. Instead, a beam path and/or a radiation conductor is provided in this active part, extending from the coupling element  5 B where the radiation is input to the radiation dispensing opening in the head part, and thus conducting the radiation through the active part. 
         [0079]    The active parts  13 C and  13 D have the same design as the active part  13 E in  FIG. 16 , each again having a sound source  17 , in particular an ultrasound source and a pushbutton or trigger  21 . The tools  15  of the two active parts  13 C,  13 D can be or are connected to the sound source  17 , so that vibrations can be transferred to them. 
         [0080]    The active part  13 D serves to shape, model or compress the filling material that is dispensed into a cavity, in particular a dental cavity. It is detachably or undetachably connected to a tool  15  designed as a modeling probe  15 D. The vibrations generated by the sound source  17  are transferred to the filling material via the tool  15 , thereby lowering its viscosity. 
         [0081]    The endodontic tool  15  in the form of an endodontic needle or dental file  15 C connected detachably or undetachably to the active part  13 C serves to widen a dental root canal. The dental file  15 C therefore has an abrasive section  51 , which is induced to vibrate by the sound source  17  and which removes tissue from the dental root canal because of its vibrational movement. 
         [0082]    The delivery parts  6 - 6 E and/or the active parts  13 A- 13 E, in particular their outer sleeves, are manufactured from materials which resist negative influences such as corrosion due to sterilization or thermal disinfection. 
         [0083]    The invention is not limited to the embodiments described here but instead comprises all embodiments and applications which apply or comprise the basic function principle of the invention. In addition, all features of all embodiments described and illustrated here can be combined with one another. 
         [0084]    Thus, in particular different applications can be implemented by a single delivery part  6 - 6 E or active part  13 A- 13 E if they can be connected to different receptacles  10 , media containers  11  and/or tools  15 . For example, it is conceivable for media containers with different media, for example, with a filling material for a cavity and with a filling material for a root canal to be connectable to a single delivery part, so that this delivery part can be used for dispensing different media and/or for dispensing one or different media to different treatment sites. The same thing is true of the active parts, so that, for example, a single active part comprising a sound source can be connected to a file  15 C, a modeling probe  15 D or an obturation needle  15 E. 
         [0085]    It should also be pointed out that according to one embodiment, the treatment device  1  comprises a base part  2  and all the delivery parts  6 - 6 E or active parts  13 A- 13 E shown in  FIGS. 1-16 . According to another embodiment, the treatment device  1  does not include all these delivery parts  6 - 6 E or active parts  13 A- 13 E but instead includes fewer delivery parts  6 - 6 E and/or active parts  13 A- 13 E, in particular at least one delivery part  6 - 6 E and one additional delivery part  6 - 6 E or one active part  13 A- 13 E. 
         [0086]    The invention is not limited to the embodiments described here but instead comprises all embodiments, which employ or include the basic appropriate function principle of the invention. In addition, all features of all the embodiments described and illustrated here may be combined with one another.