EP0742000B1 - Erkennung der Entnahme eines zahnärztlichen Behandlungsintrumentes - Google Patents
Erkennung der Entnahme eines zahnärztlichen Behandlungsintrumentes Download PDFInfo
- Publication number
- EP0742000B1 EP0742000B1 EP96107279A EP96107279A EP0742000B1 EP 0742000 B1 EP0742000 B1 EP 0742000B1 EP 96107279 A EP96107279 A EP 96107279A EP 96107279 A EP96107279 A EP 96107279A EP 0742000 B1 EP0742000 B1 EP 0742000B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- instrument
- magnetic field
- repository
- instruments
- removal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
- A61G15/14—Dental work stands; Accessories therefor
- A61G15/16—Storage, holding or carrying means for dental handpieces or the like
Definitions
- the invention relates to a device for detecting the removal of a dental Treatment instrument from a storage device assigned to the instruments.
- the removal of the Instrumentes can be detected from the storage device. It is known to take one Instrumentes from the storage device using mechanical switches that act as sensors act to monitor. Likewise, it is already known with the help of light barriers Detection of an instrument. Such a device is, for example in DE-A-43 09 773 of the applicant, wherein when removing a Instrument from the storage device of the light beam of a light barrier arrangement is interrupted and thus the removal of the instrument can be concluded can. Because of the storage device that interrupts the light barrier reports, the position of the removed instrument can be derived.
- WO 95/05795 describes a further device for detecting the removal of a dental treatment instrument known from a storage device, the Treatment instrument has a permanent magnet.
- the permanent magnet is A corresponding relay is assigned in the storage device, which is used during removal the instrument is switched by the movement of the permanent magnet, so that thereby the removal of the treatment instrument can be recognized.
- JP-A-62/137047 and JP-A-62/142548 also propose each To encode the instrument handpiece with a characteristic resistance value. Due to the measured resistance value when connecting the instrument can closed the type of instrument and accordingly the equipment according to type and Quantity can be regulated. According to these documents, however, the resistance becomes a each instrument automatically when the instrument is attached to the tube Coupling the corresponding resistance value measured.
- EP 0 300 317 B1 From EP 0 300 317 B1 the tools of a dental are known Treatment instrument with magnetic strips arranged according to the binary logic code so that when using a specific tool in the dental Treatment instrument based on the coding that corresponds to the tool Rotation speed of the treatment instrument can be adjusted.
- the EP 0 300 317 B1 does not relate to the removal detection of a dental Treatment instrument still the type recognition of the removed Treatment instrument.
- EP 0 110 200 A1 proposes to identify the type of one from the storage device removed dental treatment instrument, the device side Connection fittings of the treatment instruments with pins as coding means too provided with when connecting a specific treatment instrument correspondingly provided contact sockets of the instrument-side connection fittings interact mechanically. Because of the plugging together of the pins and the contact sockets closed contacts can be on the electronics close the connected instrument type. In addition, the capture of the Removal of an instrument by storage sensors in the form of light barriers realized.
- the invention is therefore based on the object of a new and improved device to detect the removal of a dental treatment instrument from a Storage facility to specify.
- the new improved device for determining the type of withdrawn instrument may be suitable, preferably at the same time as the Detecting the removal of the dental instrument also determined its type can be.
- the storage device of the respective dental Instruments a device for generating a magnetic field in the Storage device arranged.
- This magnetic field is used during the removal changed or disturbed an instrument from its storage device, this Change or disturbance of the magnetic field can be detected by the storage sensors is.
- the inventive detection of the removal of an instrument from its Storage device offers compared to the previously known devices in particular the advantage that a change or disturbance of the magnetic field in the storage device basically not only qualitatively, as is the case for example with the known storage sensors in the form of light barriers Case is, but is also quantitatively ascertainable.
- each Instrument a characteristic, preferably a characteristic magnetic element, on which (s) when the instrument is removed his storage device a characteristic change in the magnetic field causes. This makes it possible to remove an instrument from the Storage device to automatically detect the type of instrument.
- the elements connected magnetic element has a higher permeability than air, so that when stored of the instruments the magnetic field is amplified. If the instrument from the Removed storage device, the field strength in the storage device decreases, so that the decrease in the field strength of the removal of the dental instrument from the Storage facility can be equated.
- the element can be ring-shaped on the Instrument handpiece and e.g. an inserted or injected Be a soft iron ring. But also plastic material with magnetic Properties are used.
- various storage sensors for detecting the change in proposed magnetic field. For example, changing the magnetic field with the help of a Hall sensor from a permanent magnet is biased to be monitored.
- the magnetic field can also be a be alternating magnetic field, this alternating magnetic field being used by antennas Storage sensors is monitored.
- the magnetic field When depositing an instrument in the storage device arises due to the presence of that attached to the instrument magnetic element a disturbance of the alternating magnetic field, so that due of the different magnetic fields received by the antenna Presence of the instrument in the storage device or when removing the Instrument removal from the storage device to monitor the removal of the instrument can.
- the individual storage sensors or the corresponding ones Measuring devices, the change or disturbance of the magnetic field monitor, connected to a central control unit, depending on the delivered Value of the change in the magnetic field to the type of the removed instrument closes and controls a supply device accordingly to the removed To supply the instrument with the appropriate equipment.
- Fig. 1 three different dental instruments are shown as an example electric drill 2a, a tartar removal device 2b and a curing light 2c.
- the Individual instruments are in each case related to the respective dental Storage facility belonging to the treatment center 1a-c.
- the individual instruments are over controllable switches connectable to a central supply bus 6, the central one Includes supply lines for air, water and electricity.
- Each of the storage facilities 1a-c comprises a storage sensor 4a-c, with the aid of which an instrument can be removed the corresponding storage device is to be monitored.
- the one from the Storage sensors 4a-c signals 8a-c are sent to a central control unit 9 created, depending on the signals 8a-c supplied by the storage sensors 4a-c outputs corresponding control signals 7a-c to the controllable switches in order to remove the removed To supply the instrument with the appropriate equipment.
- the central control unit 9 activates a central supply unit 10, alternatively also instead of a central supply unit and a central supply bus individual supply units assigned to the respective instruments and Supply lines can be present.
- the central control unit 9 is dimensioned at the same time, the operating supplies emitted by the supply unit 10, i.e. provides the Amount of equipment dispensed depending on the type of instrument removed on.
- control panel 12 which also as Ad unit e.g. of the type of instrument removed or that of the respective Instrument supplied equipment is used because it has a display.
- FIG. 1 shows a cross-sectional view of the storage device 1a with the electric drill 2a.
- the storage device 1a has a Hall sensor 4a that is biased by a magnet 13a, preferably a permanent magnet.
- An impressed current is applied to the Hall sensor perpendicular to the plane of the drawing, the impressed current source not being shown for the sake of clarity.
- the magnetic field is perpendicular or oblique to the current flow in the Hall sensor. Due to the magnetic field, the electrons in the Hall sensor are deflected, so that a voltage difference is formed between the upper and lower edge of the Hall sensor, which is referred to as Hall voltage U H.
- the Hall voltage U H is directly proportional to the strength of the magnetic field. Since each instrument is provided with an iron core, the presence of the instrument in the storage device increases the magnetic field due to the iron core, while it is weakened when the instrument is removed from the storage device.
- the Hall voltage is monitored by a corresponding measuring device 5a-c and delivers a corresponding information signal 8a-c to the central control unit 9.
- the drop in the Hall voltage U H can be used to conclude that the corresponding instrument has been removed.
- ferromagnetic elements 3a-c para-magnetic or even diamagnetic elements can also be used, so that when the instrument is removed, the magnetic field is amplified and the Hall voltage increases in the case of diamagnetic elements.
- each instrument is provided with a characteristic magnetic element.
- each magnetic element 3a-c can have a different permeability, with a different change in the Hall voltage U H or the magnetic field H depending on the removal of a specific instrument from its storage device.
- the same effect can be achieved if each of the magnetic elements is provided with a different thickness, so that, depending on the magnetic element of the removed instrument, the distance between the magnetic element and the corresponding Hall sensor in the storage device varies and also a different one from instrument Instrument deviating change in Hall voltage occurs.
- the central control unit 9 is equipped with a central unit or Microprocessor 14 provided which accesses the data of a memory 15.
- the Memory 15 are different comparison values for the change in the Hall voltage filed, each with the change values supplied by the measuring devices 5a-c the Hall voltage can be compared to determine the type of instrument removed. For each Hall voltage value there is an instrument type in the memory as well as the corresponding operating data for the control of the supply unit 10.
- the central unit 14 reads out the content of the memory 15.
- the memory content can be external can be changed via the control panel 12. Likewise, externally via the control panel 12 and the foot controller 11 are acted on the control of the central control unit 9.
- the memory 15 is preferably designed as a PROM.
- the Comparative data are provided for each instrument with the corresponding operating data Commissioning of the entire device is written into the memory 15.
- the corresponding Hall voltage values can be determined, for example, by a A test run must be carried out before the entire arrangement is put into operation. While The test run will show the difference in Hall voltage for each instrument stored and removed instrument using the appropriate measuring device determined and written into the memory 15. The user then assigns the Hall voltage values to the appropriate instrument type and the appropriate operating data.
- a second invention according to the invention is described below with reference to FIGS. 4 and 5 Described embodiment.
- each storage device 1a-c provided for generating an alternating magnetic field, which is connected to the Generator 16 connected antenna 17 is emitted.
- Each instrument 2a-c is again encoded with a corresponding magnetic element 3a-c.
- the antenna 17 The alternating magnetic field emitted is received and received by a further antenna 18 the respective measuring device forwarded. Because of the alternating magnetic field the magnetic element connected to the instrument is mutually in magnetized different directions. Due to the presence of the magnetic Element in the alternating magnetic field results in the deposition status of the corresponding instrument a disturbance of the alternating magnetic field caused by the corresponding antenna 18 is detected.
- the respective measuring device can determine the presence of the instrument close in the storage device assigned to the instrument. Will the instrument removed from its storage device, so occurs in that received by the antenna 18 magnetic alternating field a change, this being the measuring device 5 as Removal of the instrument from the assigned storage device evaluates. So can in this way by monitoring what is received by antenna 18a-c magnetic alternating field on the removal of an instrument from the assigned Storage facility can be closed.
- Fig. 5a shows the course of a pure alternating magnetic field, which ideally almost a sinusoidal course having.
- Such an alternating magnetic field is shown in FIG. 4 by the antenna 17a emits and, in the absence of the instrument 2a in its storage device 1a, also received by the antenna 18a and forwarded to the measuring device 5a. Is however, the instrument with the magnetic element 3a in the storage device 1a stored, the magnetic alternating field shown in Fig.
- FIG. 5a is due to the periodic magnetic reversal of the magnetic element 3a disturbed, so that the Antenna 18a receives the temporal magnetic field curve shown in FIG. 5b.
- a such interference occurs when, as shown in Fig. 5b, the magnetic element 3a is out is made of a material that has a substantially symmetrical hysteresis curve having. However, as shown in Fig. 5c, becomes an element with an asymmetrical If the hysteresis curve is selected, the magnetic field is disturbed in such a way that it depends an amplitude of different magnitude from the polarization direction of the magnetization results for the individual impulses. In the hysteresis curve shown in FIG.
- the Coercive field strength for positive field strengths is significantly greater than that for negative and also the magnetization curve in the positive field strength direction is significantly steeper than in negative field strength direction.
- Each instrument 2a-c becomes a magnetic element 3a-c with one each assigned different hysteresis curve, the control unit 9 can depending on the amplitudes or the course of the antennas 18a-c received alternating magnetic fields to the appropriate type.
- a corresponding comparison value for the waveform or the amplitude of the alternating magnetic field received by the antennas 18a-c can be stored. If an instrument is removed from the storage device, the resulting one Change / disturbance of the magnetic field detected by the associated measuring device and forwarded to the central control unit, depending on the reported Magnetic field change indicates the type of instrument removed.
- the asymmetrical hysteresis curve shown in FIG. 5c can for example by applying an antiferromagnetic layer on a soft magnetic material can be achieved, the antiferromagnetic layer with the soft magnetic material is magnetically coupled.
- the central control unit according to the invention can also include a locking device that when an instrument is removed from a Storage device prevents additional instruments from being sent to the central Supply lines 6 can be connected. This can be done, for example happen that the controllable switches connected to the other instruments be deactivated.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
Claims (25)
- Vorrichtung, mitzu einem zahnärztlichen Behandlungsplatz gehörenden zahnärztlichen Instrumenten (2a.c);einer den Instrumenten zugewiesenen Ablageeinrichtung (1a-c); undAblagesensoren (4a-c), die das Entnehmen eines Instruments aus der Ablageeinrichtung (1a-c) erfassen;daß in der Ablageeinrichtung (1a-c) eine Einrichtung (13a, 16a) zum Erzeugen eines magnetischen Feldes (B, H) in der Ablageeinrichtung (1a-c) angeordnet ist; unddaß die Ablagesensoren (4a-c) zur Erfassung einer Änderung bzw. Störung des magnetischen Feldes (B, H), welche durch Entnahme eines Instruments (2a-c) aus seiner Ablageeinrichtung (1a-c) verursacht wird, ausgebildet sind.
- Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Instrumente (2a-c) in dem magnetischen Feld (H,B) angeordnet sind, wenn sie sich in der entsprechenden Ablageeinrichtung (1a-c) befinden. - Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß die Instrumente (2a-c) jeweils mit einem Element (3a-c) zurÄnderung des magnetischen Feldes (H,B) bei Entnahme der Instrumente aus der Ablageeinrichtung (1a-c) versehen sind, unddaß beim Ablegen eines Instrumentes (2a-c) in seiner Ablageeinrichtung (1a-c) das an dem Instrument befestigte Element (3a-c) im Vergleich zum entnommenen Zustand des Instrumentes das magnetische Feld (H,B) stört bzw. verändert. - Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß das Element (3a-c) eine von Luft unterschiedliche Permeabilität aufweist. - Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß das Element (3a-c) aus ferromagnetischem Material gefertigt ist. - Vorrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß das Element (3a-c) weichmagnetisch ist. - Vorrichtung nach einem der Ansprüche 3-6,
dadurch gekennzeichnet, daß das Element (3a-c) ringförmig und/oder in das entsprechende Instrumentenhandstück (2a-c) eingelegt oder eingespritzt ist. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß jeder der Ablagesensoren (4a-c) ein von dem magnetischen Feld (H, B) durchsetzter Hallsensor ist, der aufgrund der Veränderung des magnetischen Feldes (H,B) eine veränderte Hallspannung (ΔUH) liefert. - Vorrichtung nach Anspruch 8,
dadurch gekennzeichnet, daß die Hallsensoren (4a-c) zwischen der Einrichtung (13a,16a) zum Erzeugen des magnetischen Feldes (H,B) und dem entsprechenden Instrument (2a-c) angeordnet sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß die Einrichtung (13a) zum Erzeugen des magnetischen Feldes (H, B) ein Permanentmagnet ist. - Vorrichtung nach einem der Ansprüche 1-9,
dadurch gekennzeichnet,daß das magnetische Feld (H,B) ein magnetisches Wechselfeld ist, unddaß die Ablagesensoren Antennen (18a-c) sind, die das magnetische Wechselfeld erfassen. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß jedes Instrument (2a-c) eine charakteristiche Eigenschaft zur Änderung des magnetischen Feldes (H,B) bei der Entnahme des Instruments aus der entsprechenden Ablageeinrichtung (1a-c) aufweist. - Vorrichtung nach Anspruch 12,
dadurch gekennzeichnet, daß jedes Instrument (2a-c) mit einem für das jeweilige Instrument charakteristischen magnetischen Element (3a-c) versehen ist. - Vorrichtung nach Anspruch 13,
dadurch gekennzeichnet, daß jedes Element (3a-c) eine unterschiedliche Permeabilität aufweist. - Vorrichtung nach Anspruch 13 oder 14,
dadurch gekennzeichnet, daß jedes Element (3a-c) der einzelnen Instrumente (2a-c) eine unterschiedliche Dicke aufweist, wodurch jedes Element bei Ablage des entsprechenden Instrumentes in der Ablageeinrichtung (1a-c) von dem entsprechenden Ablagesensor (4a-c, 18a-c) unterschiedlich weit beabstandet ist. - Vorrichtung nach Anspruch 13,
dadurch gekennzeichnet, daß jedes Element (3a-c) eine unterschiedliche Koerzitivfeldstärke und/oder einen unterschiedlichen Hystereseverlauf aufweist. - Vorrichtung nach einem der Ansprüche 8-13,
dadurch gekennzeichnet, daß jedes Instrument (2a-c) mit einer Einrichtung versehen ist, die jeweils ein für das Instrument charakteristisches magnetisches Feld, insbesondere mit einer für das jeweilige Instrument charakteristischen magnetischen Feldstärke, erzeugt. - Vorrichtung nach einem der vorhergehenden Ansprüche,
gekennzeichnet durcheine zentrale Steuereinheit (9) zur Identifizierung eines aus seiner Ablageeinrichtung (1a-c) entnommenen Instrumentes (2a-c), undmindestens eine Versorgungseinheit (10) zur Versorgung des identifizierten Instrumentes (2a-c) mit den für das identifizierte Instrument nach Art und Menge passenden Betriebsmitteln, wie Luft, Wasser, Strom - Vorrichtung nach Anspruch 18,
dadurch gekennzeichnet, daß durch die zentrale Steuereinheit (9) ein entnommenes Instrument (2a-c) aufgrund eines von dem entsprechenden Ablagesensor (4a-c, 18a-c) gelieferten Signals, das die durch die Entnahme des Instrumentes hervorgerufene instrumentenspezifische Änderung des Magnetfeldes (H,B) kennzeichnet, identifizierbar ist. - Vorrichtung nach Anspruch 18 oder 19,
dadurch gekennzeichnet, daß durch die zentrale Steuereinheit (9) ein aus der Ablageeinrichtung entnommenes Instrument (2c) durch Vergleich des gelieferten instrumentenspezifischen Magnetfeldänderungswertes mit vorgegebenen Magnetfeldänderungswerten identifizierbar ist. - Vorrichtung nach Anspruch 20,
dadurch gekennzeichnet, daß die zentrale Steuereinheit (9) die Versorgungseinheit (10) abhängig von Betriebsdaten steuert, die den vorgegebenen instrumentenspezifischen Magnetfeldänderungswerten zugeordnet sind. - Vorrichtung nach Anspruch 21,
dadurch gekennzeichnet, daß die vorgegebenen Magnetfeldänderungswerte und Betriebsdaten gespeichert sind, vorzugsweise in einem PROM (15) oder auf einer austauschbaren Speicherkarte. - Vorrichtung nach Anspruch 21 oder 22,
dadurch gekennzeichnet, daß die vorgegebenen Magnetfeldänderungswerte und Betriebsdaten über ein Bedienfeld (12) veränderbar sind. - Vorrichtung nach einem der Ansprüche 18-23,
gekennzeichnet durch
eine zentrale Versorgungseinheit (10), an die über einen zentralen Versorgungsbus (6) die zahnärztlichen Instrumente (2a-c) des zahnärzlichen Behandlungsplatzes anschließbar sind. - Vorrichtung nach Anspruch 24,
dadurch gekennzeichnet, daß bei Entnahme eines Instrumentes (2a-c) aus der Ablageeinrichtung (1a-c) das entnommene Instrument an den zentralen Versorgungsbus (6) anschließbar ist, während die anderen Instrumente vom zentralen Versorgungsbus trennbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19516823 | 1995-05-08 | ||
DE19516823A DE19516823A1 (de) | 1995-05-08 | 1995-05-08 | Erkennung der Entnahme eines zahnärztlichen Behandlungsinstrumentes |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0742000A2 EP0742000A2 (de) | 1996-11-13 |
EP0742000A3 EP0742000A3 (de) | 1997-01-02 |
EP0742000B1 true EP0742000B1 (de) | 2001-11-07 |
Family
ID=7761349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96107279A Expired - Lifetime EP0742000B1 (de) | 1995-05-08 | 1996-05-08 | Erkennung der Entnahme eines zahnärztlichen Behandlungsintrumentes |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0742000B1 (de) |
DE (2) | DE19516823A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007008366A1 (de) * | 2007-02-16 | 2008-08-21 | Sirona Dental Systems Gmbh | Behandlungseinheit mit Sensorsystem zur Erkennung dentaler Handinstrumente und Verfahren zur Kontrolle und Identifikation eines Handinstruments |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1970020B1 (de) * | 2007-03-12 | 2011-08-31 | W & H Dentalwerk Bürmoos GmbH | Mit einem Elektromotor betreibbares Laborhandstück |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3243294A1 (de) * | 1982-11-23 | 1984-05-24 | Siemens AG, 1000 Berlin und 8000 München | Steuereinrichtung fuer in einem zahnaerztlichen geraet in ablagen gehalterte instrumente |
JPS62137047A (ja) * | 1985-12-11 | 1987-06-19 | 株式会社吉田製作所 | 歯科治療装置 |
US4900252A (en) * | 1987-07-24 | 1990-02-13 | Siemens Aktiengesellschaft | Recognition system for tools insertable into dental treatment instruments |
DE4220522C2 (de) * | 1992-06-23 | 1995-04-06 | Kaltenbach & Voigt | Schlauchkennung |
DE4309773A1 (de) * | 1993-03-25 | 1994-09-29 | Kaltenbach & Voigt | Lichtschranke, insbesondere für eine Ablageeinrichtung für ärztliche oder zahnärztliche Handinstrumente |
SE501384C2 (sv) * | 1993-08-23 | 1995-01-30 | Jan Aake Hallen | Hållare för verktyg som drivs via ledning |
-
1995
- 1995-05-08 DE DE19516823A patent/DE19516823A1/de not_active Withdrawn
-
1996
- 1996-05-08 DE DE59608101T patent/DE59608101D1/de not_active Expired - Lifetime
- 1996-05-08 EP EP96107279A patent/EP0742000B1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007008366A1 (de) * | 2007-02-16 | 2008-08-21 | Sirona Dental Systems Gmbh | Behandlungseinheit mit Sensorsystem zur Erkennung dentaler Handinstrumente und Verfahren zur Kontrolle und Identifikation eines Handinstruments |
DE102007008366B4 (de) * | 2007-02-16 | 2008-11-13 | Sirona Dental Systems Gmbh | Behandlungseinheit mit Sensorsystem zur Erkennung dentaler Handinstrumente und Verfahren zur Kontrolle und Identifikation eines Handinstruments |
Also Published As
Publication number | Publication date |
---|---|
DE59608101D1 (de) | 2001-12-13 |
EP0742000A3 (de) | 1997-01-02 |
DE19516823A1 (de) | 1996-11-14 |
EP0742000A2 (de) | 1996-11-13 |
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