Dental tool with miniaturized RFID tag and dental CNC milling / grinding machine using the same

Abstract

The present invention relates to a dental tool (1) for use in a dental CNC milling / grinding machine for machining a dental restoration from a workpiece (6), the dental tool (1) comprising: a handle (2); characterized in that it also comprises: a miniaturized RFID tag (3) arranged in front of a rear end (2a) of the handle (2). The present invention also relates to a dental CNC milling / grinding machine (5), characterized in that it comprises: a machine compartment (5a) comprising one or more slide units (5b), each slide unit being adapted to interchangeably receive and drive one or more dental tools (1) for machining a dental restoration from a workpiece (6); one or more transceiver units (5c), each transceiver unit being adapted to read and / or write a miniaturized RFID tag (3) of the dental tool (1); and a control unit being adapted to control the transceiver unit (5c) and the slide unit (5b) based on information read from the miniaturized RFID tag (3).

Description

Technical Field

[0001] The present invention relates to a dental tool for use in a dental CNC milling / grinding machine for machining a dental restoration from a workpiece. The present invention also relates to a dental CNC milling / grinding machine for machining a dental restoration from a workpiece using one or more dental tools. Background Art

[0002] In general, a dental CNC milling / grinding machine has: a mounting unit for mounting at least one workpiece; and one or more slide units, each of which is used to drive at least one dental tool for machining a dental restoration from a workpiece. The handle of the dental tool can be mounted to a dental tool motor in the slide unit. Typically, CAD / CAM software is used to construct the dental restoration and to provide corresponding machining data to the dental CNC milling / grinding machine. The workpiece and the dental tool are consumables. The workpieces and dental tools available on the market vary in size, shape and material. Before machining, the dental CNC milling / grinding machine must be equipped by the user with the desired workpiece and at least one competent dental tool. If the dental tool does not specifically match the machining process, there is a risk that the dental restoration cannot be machined with the desired quality. In the worst case, if the dental tool has been used in a previous machining process, it may exceed its total service life or remaining service life. In this case, the dental tool will break and the dental restoration will be damaged. In less severe cases, the machining of the dental restoration will be completed with unacceptably low quality due to the use of an incompetent dental tool. In all of these cases, user satisfaction may decrease and users may complain about quality. Summary of the invention

[0003] The object of the present invention is to overcome the above mentioned problems of the prior art and to provide a dental tool for use with a dental CNC milling / grinding machine which prevents or reduces the risk of producing dental restorations which are unusable or of unacceptably low quality.

[0004] This object is achieved by a dental tool as defined in claim 1 and a dental CNC milling / grinding machine as defined in claim 13. The other claims relate to further developments.

[0005] The present invention provides a dental tool for use in a dental CNC milling / grinding machine for machining a dental restoration from a workpiece. The dental tool has a handle and a miniaturized RFID tag arranged in front of a rear end portion of the handle.

[0006] The present invention also provides a dental CNC milling / grinding machine. The dental CNC milling / grinding machine comprises: at least one slide unit, which is suitable for interchangeably receiving and driving one or more dental tools of the present invention; at least one transceiver unit, which is suitable for reading and / or writing a miniaturized RFID tag of the dental tool; and a control unit, which is suitable for controlling the transceiver unit and the slide unit based on information read from one or more miniaturized RFID tags.

[0007] The main advantageous effect of the present invention is that a miniaturized RFID tag can be used to store dental tool-specific information relating to a dental tool. Thus, the dental tool-specific information can be quickly and clearly collected by means of a transceiver unit of a dental CNC milling / grinder. Therefore, the dental CNC milling / grinder can be operated based on the dental tool-specific information. Thus, the risk of machining a dental restoration from a workpiece with unacceptably low quality can be prevented or reduced as much as possible. Thus, the risk of dental tool breakage and the resulting damage to the dental restoration can also be avoided or reduced as much as possible. Another main advantageous effect of the present invention is that the need for the user to remember or save a log of dental tool-specific information can be eliminated, and the dental CNC milling / grinder can be operated safely and user-friendly. For example, when the dental CNC milling / grinder has determined that the dental tool has sufficient remaining service life for the machining process, the user can safely use the dental tool again. For example, the user can be prevented from using a dental tool in an unspecified dental tool motor on a slide unit. Another major advantageous effect of the invention is that the miniaturized RFID tag can be effectively read out by a simple manipulation, i.e. by bringing the rear end of the dental knife close to the transceiver unit, so that safe reading and / or writing can always be performed in the range from direct contact to a distance of several millimeters. Since the miniaturized RFID tag is arranged in front of the rear end of the handle, a rotation-independent angle range for communication with the miniaturized RFID tag is guaranteed, which angle range has at least a hemispherical solid angle.

[0008] According to an embodiment of the present invention, the dental cutter preferably has a robust protective housing that accommodates and seals a miniaturized RFID tag. The protective housing is preferably made of a plastic material that encapsulates the miniaturized RFID tag. The front section of the protective housing is preferably mechanically connected to the rear end of the handle. Alternatively, an adhesive can be used for connection. The miniaturized RFID tag is preferably embedded in the rear section of the protective housing outside the handle to facilitate RF communication with the transceiver unit of the dental CNC milling / grinding machine. The space between the miniaturized RFID tag and the protective housing is preferably filled with a sealing material. The protective housing and the miniaturized RFID tag preferably have a concentric, rotationally symmetrical and balanced arrangement on the handle of the dental cutter. Thus, the dental cutter can be used in the dental cutter motor of the slide unit at a relatively high rotation speed (e.g., up to 60,000 revolutions per minute) without any problems. The protective housing is optional. Therefore, the miniaturized RFID tag can be directly arranged in front of the rear end of the handle and fixed in place by adhesive sealing or the like.

[0009] According to an embodiment of the invention, the front section of the protective housing is preferably fitted into a hole that has been formed into the rear end of the handle of the dental cutter. Thereby, the connection and the seal can be further improved. In this embodiment, the rear section of the housing accommodating the miniaturized RFID tag is arranged in front of the rear end of the handle, specifically, outside the hole. Thereby, the transceiver unit can communicate with the miniaturized RFID tag unhindered through the entire rearward direction and the entire radial direction.

[0010] According to an alternative embodiment of the present invention, the front section of the housing is preferably assembled to a reduced diameter section, which has been formed into the rear end of the handle of the dental tool. Thereby, the connection and sealing can also be further improved. In this embodiment, the rear section of the housing that accommodates the miniaturized RFID tag is arranged in front of the reduced diameter section, specifically, outside the handle. Moreover, in this alternative embodiment, the transceiver unit can communicate with the miniaturized RFID tag unimpeded through the entire rearward direction and the entire radial direction. In addition, the reduced diameter section preferably has one or more circumferentially extending protrusions. And the front section of the housing is assembled to the protrusions. Thereby, the connection and sealing can be further improved. Alternatively, the reduced diameter section has one or more circumferentially extending grooves, which respectively engage with matching claws formed on the front section of the housing. Thereby, the connection and sealing can also be further improved.

[0011] According to an embodiment of the present invention, the miniaturized RFID tag is preferably of a read-only type. The miniaturized RFID tag stores dental tool-specific information specifically related to the dental tool. The dental tool-specific information includes at least a unique ID, such as a universally unique identifier (UUID), for unambiguously identifying the dental tool. The dental tool-specific information preferably also includes information about at least one of the type, manufacturer, batch number, length and concentricity of the dental tool. According to an alternative embodiment, the miniaturized RFID tag is preferably of a read-write type. In this alternative embodiment, the dental tool-specific information preferably also includes the remaining service life of the dental tool, or alternatively includes the usage time of the dental tool, both of which can be determined by a dental CNC milling / grinder and written into the miniaturized RFID tag by a transceiver unit. The miniaturized RFID tag preferably has a miniaturized hollow coil.

[0012] According to an embodiment of the present invention, the dental CNC milling / grinding machine is preferably provided with a communication unit for sending information to and / or receiving information from a data storage unit, which is used to store at least the dental tool-specific information described above for one or more different dental tools. The data storage unit can be accessed to read, write, overwrite, and update the dental tool-specific information via a unique ID. The data storage unit may be inside or outside the dental CNC milling / grinding machine. The data storage unit may be accessible via a network, the Internet, etc. The data storage unit stores at least a unique ID for identifying the dental tool and dental tool-specific information about at least one of the type, manufacturer, batch number, length and concentricity of the dental tool and the remaining service life.

[0013] According to an embodiment of the present invention, a dental CNC milling / grinding machine preferably has a display for displaying information based on dental tool-specific information relating to a dental tool uniquely identified by a transceiver unit. The miniaturized RFID tag of the dental tool is read out by means of the transceiver unit. Afterwards, the dental tool-specific information read from the miniaturized RFID tag and / or received from the data storage unit is displayed on the display. Thus, the user can obtain detailed information about the identified dental tool and determine whether the dental tool is competent for the upcoming machining process. The display also preferably shows the dental tool-specific information of one or more dental tools required for the upcoming machining process, as well as the associated position on the slide unit where the user should install the dental tool. Therefore, the display is used to inform and also to guide the user in terms of dental tools, workpieces, etc. for the upcoming machining process.

[0014] According to an embodiment of the present invention, if the control unit determines based on the dental tool-specific information that the dental tool is worn or has an insufficient remaining service life, or determines that the dental tool is installed in an unspecified (i.e., wrong) position in the slide unit, the control unit prohibits driving the slide unit.

[0015] According to an embodiment of the present invention, a dental CNC milling / grinding machine has a panel covering a transceiver unit. The panel is thin enough and close to the transceiver unit to allow RF communication between a miniaturized RFID tag and the transceiver unit. The position of the transceiver unit is marked on the panel or can be easily identified so that the user can easily position the dental cutter near the transceiver unit. Thus, the dental cutter can be identified before being installed at any position on the slide unit. Thus, for example, before the dental cutter is installed on the slide unit, the user can be guided by a display. For example, the user can be informed whether the dental cutter is capable of the upcoming machining process and where it must be installed on the slide unit. Acoustic guidance can be used alternatively.

[0016] According to an alternative embodiment, one or more transceiver units are arranged close to the installation position of the dental tool in one or more slide units. Thus, the dental tool can also be identified after it has been installed in the slide unit. Thus, the user can be informed whether the competent dental tool has been installed to the correct position specified on the slide unit. Similarly, the user can also be further guided by the display. The antenna of each transceiver unit is preferably configured by the associated stator of the dental tool motor in the slide unit. Alternatively, one or more separate antennas for each transceiver unit can be arranged in the slide unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the following description, further aspects and advantageous effects of the present invention will be described in more detail by using exemplary embodiments and by referring to the accompanying drawings, in which:

[0018] Figure 1 – is a schematic enlarged cross-sectional partial view of a dental cutter according to an embodiment of the present invention;

[0019] Figure 2 – is a schematic enlarged cross-sectional partial view of a dental cutter according to another embodiment of the present invention;

[0020] Figure 3 – is a schematic enlarged cross-sectional partial view of a dental cutter according to another embodiment of the present invention;

[0021] Figure 4 – are schematic side views of various dental knives according to other embodiments of the present invention;

[0022] Figure 5 – is a schematic enlarged side view of a protective housing of a miniaturized RFD tag for a dental tool according to an embodiment of the present invention;

[0023] Figure 6 - yes Figure 5 A schematic vertical cross-sectional view of a protective housing;

[0024] Figure 7 - yes Figure 5 A schematic perspective view of a protective housing;

[0025] Figure 8 – is a schematic front view of a dental CNC milling / grinding machine according to an embodiment of the present invention;

[0026] Fig. 9 - yes Figure 8 A schematic perspective view of a dental CNC milling / grinding machine, wherein the cover of the machine compartment has been opened;

[0027] Fig.10 - yes Figure 8 A schematic enlarged perspective view of a display of a dental CNC milling / grinding machine, wherein the display shows consumables.

[0028] The reference numerals shown in the drawings denote the elements listed below and will be referenced in the subsequent description of the exemplary embodiments:

[0029] 1. Dental Knives

[0030] 2. handle

[0031] 2a. Rear end

[0032] 2b. Hole

[0033] 2c. Section with reduced diameter

[0034] 2c-1. Protrusion

[0035] 2c-2. Groove

[0036] 3. Miniaturized RFID tag (with hollow coil)

[0037] 4. Housing

[0038] 4a. Anterior segment

[0039] 4a-1. Claw

[0040] 4b. Rear section

[0041] 5. Dental CNC milling / grinding machine

[0042] 5a. Machine tool compartment

[0043] 5b. Slide unit

[0044] 5c. Transceiver unit

[0045] 5d. Camera

[0046] 5e. Display

[0047] 5f. Panel

[0048] 5g. Lid

[0049] 6. Artifacts

[0050] P1, P2: Position of the dental tool (1) on the left slide unit (5b)

[0051] P1', P2': Position of the dental knife (1) on the right slide unit (5b). DETAILED DESCRIPTION

[0052] like Fig. 9 As shown in the figure, the dental tool (1) of the present invention is suitable for use in a dental CNC (computer numerical control) milling / grinding machine (5) for machining dental restorations from a workpiece (6). The dental tool (1) is suitable for milling / grinding a workpiece and is preferably also suitable for calibrating the dental CNC milling / grinding machine (5) by touching the workpiece (6). Figure 4 In the figure, various dental knives (1) according to alternative embodiments of the present invention are illustrated. These dental knives (1) differ, for example, in type, length and concentricity. Their length typically varies between 40 mm and 60 mm. Figure 4 As shown in FIG. 1 , a dental cutter ( 1 ) has a handle ( 2 ) and a protective housing ( 4 ) connected to a rear end portion ( 2 a ) of the handle ( 2 ).

[0053] Figure 1 The figure shows the interior of the protective housing (4) of the dental cutter (1) according to an embodiment of the present invention. Figure 1As shown in the figure, a miniaturized RFID tag (3) is arranged in front of the rear end (2a) of the handle (2). The miniaturized RFID tag (3) is preferably a read-only type. Alternatively, a read-write type can be used. The miniaturized RFID tag (3) can also be integrally provided with a hollow coil. The miniaturized RFID tag (3) is covered by a protective shell (4). However, the protective shell (4) is optional. Alternatively, the miniaturized RFID tag (3) can be directly adhered to the front of the rear end (2a) of the handle (1) using some sealing adhesive. The front section (4a) of the protective shell (4) is connected to the rear end (2a) of the handle (2). The miniaturized RFID tag (3) is arranged on the outside of the handle (2), in the rear section (4b) of the protective shell (4).

[0054] like Figure 1 As shown in the figure, the dental cutter (1) has a reduced diameter section (2c), which has a groove (2c-2). The front section (4a) of the housing (4) has a claw (4a-1). The claw (4a-1) is assembled into the groove (2c-2).

[0055] Figure 2 A dental cutter (1) according to an alternative embodiment of the invention is shown. In this alternative embodiment, the reduced diameter section (2c) has a protrusion (2c-1) instead of a groove (2c-2). In this alternative embodiment, the front section (4a) of the protective housing (4) is not provided with claws (4a-1), but is mounted on the protrusion (2c-1). Figure 2 The dotted line in FIG. 1 shows the position of the miniaturized RFID tag ( 3 ) after assembly.

[0056] Figure 3 A dental cutter (1) according to another alternative embodiment of the present invention is shown. In this alternative embodiment, the rear end (2a) of the handle (2) has a hole (2b). And the front section (4a) of the protective shell (4) is fitted in the hole (2b). Similarly, in Figure 3 In the figure, the dotted line shows the position of the miniaturized RFID tag (3) after assembly.

[0057] In such Figures 1 to 3 In each of the embodiments shown in the drawings, the miniaturized RFID tag (3) is arranged so that it is not enclosed by the handle (2) in the circumferential and rearward directions for RF communication. The protective housing (4) is transparent to radio frequencies. The housing (4) is preferably made of a plastic material. The protective housing (4) is preferably cylindrical with a generally U-shaped cross-section.

[0058] like Figure 8 As shown in , the present invention also provides a dental CNC milling / grinding machine (5). Fig. 9 As shown in the figure, the dental CNC milling / grinding machine (5) has a cover (5g) for opening / closing a machine compartment (5a) to access consumables (such as workpieces (6) and dental tools (1)). The dental CNC milling / grinding machine (5) includes: a mounting unit for mounting at least one workpiece (6); a machine compartment (5a) including two opposed slide units (5b) for simultaneous machining, each slide unit being suitable for interchangeably receiving and driving one or more dental tools (1) according to the present invention; one or more transceiver units (5c) suitable for reading a miniaturized RFID tag (3) of a dental tool (1); and a control unit suitable for individually controlling the transceiver unit (5c) and the slide unit (5b) based on information read from the miniaturized RFID tag (3). Each transceiver unit (5c) is suitable for reading only a miniaturized RFID tag (3). Alternatively, the transceiver unit (5c) may also be suitable for reading and writing a miniaturized RFID tag (3). The dental CNC milling / grinding machine (5) preferably has a communication unit for sending information to and / or receiving information from a data storage unit. The information may also relate to dental tool-specific information. The data storage unit is preferably inside the dental CNC milling / grinding machine. The data storage unit may also store dental tool-specific information of a dental tool (1). Alternatively, the data storage unit may be outside the dental CNC milling / grinding machine (5) and accessible via a network, the Internet, etc. The dental CNC milling / grinding machine (5) preferably has a display (5e), ​​more preferably a touch screen display (5e), ​​for displaying information based on dental tool-specific information relating to the dental tool (1). The dental CNC milling / grinding machine (5) has a panel (5f) that completely or partially covers one or more transceiver units (5c). The panel (5f) is thin enough or has an aperture to allow RF communication between a miniaturized RFID tag (3) and the transceiver unit (5c). Additionally or alternatively, one or more transceiver units (5c) are arranged close to the mounting position (P1, P2, P1', P2') of the dental tool (1) in one or more slide units (5b). The antenna of the one or more transceiver units (5c) is preferably configured by an associated stator of a dental tool motor in one or more slide units (5b). Additionally or alternatively, one or more separate antennas for the transceiver unit (5c) may be arranged in the slide unit (5b).

[0059] The dental CNC milling / grinding machine (5) preferably also has a camera (5d) for reading bar codes on consumables such as dental tools (1) or workpieces (6) to identify them. The identified consumables can be displayed using text and / or icons with additional guidance information on the display (5e). The rear end of the handle (2) preferably has a mounting thread (not shown) for mounting it in the slide unit (5b), that is, in the spindle of the dental tool motor. The handle (2) can be installed by using a rotating wrench that engages with the front end of the handle (2) in a form-fitting manner during the installation process. Alternatively, other types of connections can be used instead of mounting threads.

[0060] The miniaturized RFID tag (3) of the dental tool (1) stores dental tool-specific information specifically related to the dental tool (1). The dental tool-specific information includes at least a unique ID for identifying the dental tool (1). The dental tool-specific information preferably also includes information about at least one of the manufacturer, batch number, type, length and concentricity of the dental tool (1). In the case where the miniaturized RFID tag (3) is of a read-write type, the dental CNC milling / grinding machine (5) also stores the remaining service life in the dental tool (1) via the transceiver unit (5c). Alternatively or in addition, the data storage unit includes at least a unique ID for identifying the dental tool (1) and information about at least one of the manufacturer, batch number, type, length and concentricity of the dental tool (1) and the remaining service life. The remaining service life of the dental tool (1) can be monitored on a display (5e) by the dental CNC milling / grinding machine (5).

[0061] For example, the user can be guided by the display (5e) about information related to the workpiece (6) and the dental tool (1) to be used in the next machining process proposed by the CAD / CAM software. For example, the type of the workpiece (6), the type of the dental tool (1) to be used, the minimum necessary remaining service life, their designated installation positions (P1, P2, P1', P2') on the slide unit (5b), etc. can be displayed to the user on the display (5e), ​​such as Fig.10 When the control unit has determined that the installed workpiece (6) is wrong or the installed dental tool (1) is worn or has insufficient remaining service life or is installed in an incorrect position in the slide unit (5b), the control unit can prohibit the drive of the slide unit (5b).

[0062] For example, before or after installation on the slide unit (5b), the user can be informed of information related to the dental tool (1) identified by the transceiver unit (5c) through the display (5e). Dental tool-specific information of the identified dental tool (1), such as the remaining service life, the type of dental tool (1), the installation position, etc., can be displayed to the user. The workpiece (6) can be provided with a barcode to be read by the camera (5d), and the relevant information can be displayed on the display (5e), ​​such as Fig.10 As shown in .

Claims

1. A dental tool (1) suitable for being mounted in a dental CNC milling / grinding machine (5) for machining a dental restoration from a workpiece (6), the dental tool (1) comprising: handle(2); It is characterized by further comprising: A miniaturized RFID tag (3) arranged in front of the rear end (2a) of the handle (2); a protective shell (4) for covering the miniaturized RFID tag (3), wherein a front section (4a) of the shell (4) is connected to the rear end (2a) of the handle (2), wherein the miniaturized RFID tag (3) is arranged in the rear section (4b) of the shell (4) outside the handle (2); and further comprising either of the following: The rear end (2a) of the handle (2) has a hole (2b), wherein the front section (4a) of the housing (4) is fitted into the hole (2b); and The rear end (2a) of the shaft (2) has a section (2c) with reduced diameter, wherein the front section (4a) of the housing (4) is mounted on the section (2c) with reduced diameter.

2. The dental tool (1) according to claim 1, characterized in that The reduced diameter section (2c) has one or more protrusions (2c-1), wherein the front section (4a) of the housing (4) is mounted on the protrusions (2c-1).

3. The dental tool (1) according to claim 1, characterized in that The reduced diameter section (2c) has one or more grooves (2c-2), and the front section (4a) of the housing (4) has one or more claws (4a-1), wherein the claws (4a-1) are fitted into the grooves (2c-2).

4. The dental tool (1) according to any one of claims 1 to 3, characterized in that The miniaturized RFID tag (3) is of a read-only type or a read-write type.

5. The dental tool (1) according to any one of claims 1 to 3, characterized in that The miniaturized RFID tag (3) comprises a hollow coil.

6. The dental tool (1) according to any one of claims 1 to 3, characterized in that The miniaturized RFID tag (3) stores dental tool-specific information specifically related to the dental tool (1).

7. The dental tool (1) according to claim 6, characterized in that The dental tool-specific information at least includes a unique ID for identifying the dental tool (1).

8. The dental tool (1) according to claim 6, characterized in that The dental cutter-specific information further includes information on at least one of the manufacturer, batch number, type, length and concentricity of the dental cutter (1).

9. The dental tool (1) according to any one of Claims 6, characterized in that The dental tool-specific information also includes the remaining service life of the dental tool (1).

10. A dental CNC milling / grinding machine (5), characterized in that: include: a machine tool compartment (5a) comprising a plurality of slide units (5b), each of the slide units being adapted to interchangeably receive and drive a dental tool (1) according to any one of claims 1 to 9 for machining a dental restoration from a workpiece (6); one or more transceiver units (5c), each of which is suitable for reading and / or writing a miniaturized RFID tag (3) of a dental tool (1); and A control unit adapted to control the transceiver unit (5c) and the carriage unit (5b) based on information read from the miniaturized RFID tag (3).

11. The dental CNC milling / grinding machine according to claim 10, characterized in that: The machine tool compartment (5a) comprises two opposed slide units (5b) for simultaneous machining.

12. The dental CNC milling / grinding machine according to claim 10, characterized in that: The dental CNC milling / grinding machine further comprises: a communication unit, which is suitable for sending information to and / or receiving information from a data storage unit, wherein the data storage unit is inside or outside the dental CNC milling / grinding machine and stores dental tool-specific information of one or more dental tools (1).

13. The dental CNC milling / grinding machine according to claim 12, characterized in that: The dental tool-specific information stored in the data storage unit includes at least a unique ID for identifying the dental tool (1) and information on at least one of the manufacturer, batch number, type, length and concentricity, and remaining service life of the dental tool (1).

14. The dental CNC milling / grinding machine according to any one of claims 10 to 13, characterized in that If the control unit determines based on the dental-tool-specific information that the dental tool (1) is worn or has an insufficient remaining service life, the control unit is adapted to inhibit the driving of the dental tool (1).

15. The dental CNC milling / grinding machine according to any one of claims 10 to 13, characterized in that The dental CNC milling / grinding machine further comprises: a display (5e) for displaying information based on dental tool-specific information related to the dental tool (1).

16. The dental CNC milling / grinding machine according to claim 15, characterized in that: The displayed information includes at least the remaining service life of the dental tool (1) and / or the position (P1, P2; P1', P2') on the corresponding slide unit (5b) where the user should install the dental tool (1).

17. The dental CNC milling / grinding machine according to any one of claims 10 to 13, characterized in that The dental CNC milling / grinding machine further comprises: a panel (5f) for covering one or more transceiver units (5c), wherein the panel (5f) is thin enough to allow communication between the miniaturized RFID tag (3) and the transceiver unit (5c).

18. The dental CNC milling / grinding machine according to any one of claims 10 to 13, characterized in that One or more transceiver units (5c) are arranged in the carriage unit (5b).

19. The dental CNC milling / grinding machine according to claim 18, characterized in that: The slide unit (5b) has one or more dental tool motors, each of which is used to receive and rotate a dental tool (1), wherein the one or more antennas of the transceiver unit (5c) are correspondingly configured by the stator of the dental tool motor.

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