WO2018011241A1 - Dispositif de traitement dentaire ou de chirurgie dentaire destiné à la détection d'un tissu dentaire et/ou d'une anomalie du tissu dentaire - Google Patents

Dispositif de traitement dentaire ou de chirurgie dentaire destiné à la détection d'un tissu dentaire et/ou d'une anomalie du tissu dentaire Download PDF

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Publication number
WO2018011241A1
WO2018011241A1 PCT/EP2017/067473 EP2017067473W WO2018011241A1 WO 2018011241 A1 WO2018011241 A1 WO 2018011241A1 EP 2017067473 W EP2017067473 W EP 2017067473W WO 2018011241 A1 WO2018011241 A1 WO 2018011241A1
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WO
WIPO (PCT)
Prior art keywords
dental
electrical
measuring electrode
periodic
handpiece
Prior art date
Application number
PCT/EP2017/067473
Other languages
German (de)
English (en)
Inventor
Wilhelm Brugger
Christian Pruckner
Original Assignee
W & H Dentalwerk Bürmoos GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by W & H Dentalwerk Bürmoos GmbH filed Critical W & H Dentalwerk Bürmoos GmbH
Publication of WO2018011241A1 publication Critical patent/WO2018011241A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0534—Measuring electrical impedance or conductance of a portion of the body for testing vitality of teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7235—Details of waveform analysis
    • A61B5/7253—Details of waveform analysis characterised by using transforms
    • A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A61C19/041—Measuring instruments specially adapted for dentistry for measuring the length of the root canal of a tooth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A61C19/042—Measuring instruments specially adapted for dentistry for determining the position of a root apex

Definitions

  • Dental or dental surgical treatment device for the detection of dental tissue and / or an anomaly on dental tissue
  • the present invention relates to a dental or dental surgical treatment device for the detection or differentiation of dental, in particular vital or devitalized tissue and / or an anomaly on dental tissue.
  • a device for recognizing or distinguishing biological tissue is known from patent application WO 93/18402 A1. Via electrodes of the device, an electrical voltage for exciting the biological tissue is applied to the tissue to be examined in order to determine the field-dependent dielectric properties of the biological material or a measurement signal dependent on these dielectric properties of the biological material and specific for a specific biological material produce.
  • This known impedance-based device is suitable for determining tissue or parameters of tissue cells suspended in a vessel. The device is therefore not suitable for in vivo applications, especially directly on the patient.
  • the present invention is therefore an object of the invention to provide a dental or dental surgical treatment device for detecting or distinguishing dental, especially vital or devitalem tissue and / or an anomaly on dental tissue based on the field-dependent dielectric properties of the dental tissue to be examined, the for in vivo applications, in particular directly on the patient, in the oral cavity, is suitable.
  • the dental or dental surgical treatment device comprises: a handpiece with a movable in tool holder, a drive device for moving the tool holder and an impedance-based, in particular capacitive, detection device which is adapted to receive a periodic, in particular sinusoidal, electrical measurement signal and for detection of dental tissue and / or an anomaly on dental tissue.
  • Treatment apparatus which includes an impedance-based detection device and a Having handpiece or integrated with each other, it is advantageously possible for a user to use the impedance-based detection device in vivo, directly on the patient.
  • the dental or dental surgery allows
  • Treatment device or the treatment device is designed to recognize during the treatment, for example during the preparation of a cavity or the removal of tartar, plaque, etc., dental tissue and / or an anomaly of dental tissue.
  • a user to remove caries and, during the removal or during a brief interruption of caries removal with the impedance-based detection device of the dental or dental surgical treatment device, determine whether or where caries is present and subsequently remove it.
  • the same is conceivable, for example, in the removal of tartar, plaque, etc.
  • the dental or dental surgical treatment device thus enables the user, due to the combination of the impedance-based detection device with the handpiece or the integration of the impedance-based detection device into the handpiece, a considerably simplified course of treatment and a considerably increased safety, for example, if the entire carious tissue, the entire calculus etc. was removed or that vital tissue is not damaged.
  • the dental or dental surgical treatment device is configured to: detect abnormalities of dental tissue, such as caries, calculus, plaque, plaque, or biofilms; by detecting and / or distinguishing different tissues (types) to determine the distance to the pulp; by detecting and / or differentiating different tissues (types) to determine the depth of penetration into a dental bone, for example into a jaw bone during the preparation of an implant bore, or the length of a root canal, in particular during a root canal preparation; by detecting and / or distinguishing different tissues (types) to determine the depth of a periodontal pocket.
  • dental tissue such as caries, calculus, plaque, plaque, or biofilms
  • the impedance-based detection device is designed in particular as a capacitive, impedance-based detection device, which preferably uses the capacitive component of the impedance to detect dental, tissue and / or an anomaly of the dental tissue.
  • the impedance-based detection device is designed to be a function of the dielectric properties of a tissue to be examined and specific for a particular tissue Generate measurement signal to receive and evaluate the detection of dental, tissue and / or anomaly of the dental tissue.
  • the impedance-based detection device preferably has an electrical circuit or an AC circuit.
  • the electrical circuit comprises, for example, an electrical energy supply device for supplying the first measuring electrode and the second measuring electrode with periodic, in particular sinusoidal, electrical energy (alternating current), for example an electrical periodic, in particular sinusoidal, excitation signal.
  • the electrical power supply device is in particular designed to generate a fundamental-harmonic excitation or a fundamental-harmonic electrical excitation signal and to supply the measuring electrodes therewith.
  • the electrical circuit preferably has a component with predominantly capacitive functionality comprising the first measuring electrode and the second measuring electrode, which can be represented in particular as an equivalent circuit as a (lossy) capacitor, wherein this element with predominantly capacitive functionality / the capacitor has a capacitive resistance or reactance of the electrical circuit.
  • the dielectric or the electrically poorly conducting component of the element with predominantly capacitive functionality / of the capacitor, which spatially separates the two measuring electrodes, comprises biological material, for example at least the tissue to be examined, in particular the enamel or the dentin, and / or an anomaly on the tissue or tissue, especially carious tissue, calculus or plaque.
  • the two measuring electrodes are supplied with periodic, in particular sinusoidal, electrical energy, in particular the fundamental harmonic electrical excitation, by the electrical energy supply device, an electric field is created in the tissue to be examined. Due to the specific, dependent on this electric field (hereinafter referred to as "field-dependent") dielectric properties of the tissue to be examined and / or based thereon (specific) impedance (the nonlinear impedance) of the tissue and / or the predominantly element Capacitive functionality / of the capacitor, there is a change or conversion of the fundamentalharmonic electrical excitation in a measurement signal having a phase shift and in particular harmonics (shares) .
  • This specific for a specific tissue measurement signal is by the impedance-based detection device, in particular by an evaluation of the impedance-based Detection device, evaluable and, for example by comparison with stored in a memory records, attributable to a particular tissue.
  • the handpiece includes both straight and curved, often referred to as an angle piece, with a hand of a user tangible handpieces or handles.
  • the handpiece comprises a handpiece head, in particular at one end of the handpiece, in which the tool holder is arranged.
  • the handpiece then comprises a straight or bent grip part following the handpiece head.
  • the handpiece head and / or the handle part are hollow, in particular to accommodate at least part of the impedance-based detection device.
  • the tool holder is in particular as a positive and / or frictional
  • the tool holder formed.
  • the tool holder is preferably arranged in the handpiece (head) such that it can be set in a rotating, vibrating, longitudinal or oscillating movement.
  • the tool holder is stored in particular for this purpose in bearings, for example rolling or plain bearings, of the handpiece (head) s.
  • the tool holder is designed in particular as a releasable tool holder, so that a tool / the first measuring electrode of the handpiece (head) is separable.
  • An actuating element for example a pushbutton, for releasing the tool / the first measuring electrode from the handpiece (head) is preferably provided on the handpiece (head).
  • the drive device for moving the tool holder comprises at least one of the following components: an electrically operable motor, a pneumatically operable motor, at least one shaft for transmitting a drive movement to the tool holder, a transmission for transmitting a drive movement to the tool holder, a pneumatic operable impeller, a fluid conduit for conveying a drive fluid.
  • the impedance-based detection device or the electrical circuit has a first measuring electrode and a second measuring electrode, which can be supplied by an electrical power supply device with a periodic, in particular sinusoidal, electrical energy.
  • the first measuring electrode and the second measuring electrode comprise an electrically conductive material.
  • at least one of the two measuring electrodes has on at least a portion of its surface an electrically insulating material, for example a plastic sleeve or plastic coating.
  • the first measuring electrode has a dental or dental surgical
  • the tool / the first electrode comprises, for example, a tool displaceable in rotation, oscillation, oscillation and / or longitudinal movement, a tool with at least one cutting edge, a tool with at least one abrasive element or particles, a tool with an opening for discharging a fluid , in particular a liquid, an at least one bending tool, a drill, a milling cutter, a tap, a scaler tip, a file, a probe.
  • the second measuring electrode preferably has a body electrode which can be connected to the body, in particular to the mouth, of a patient.
  • the second measuring electrode comprises an element or portion for attachment to the body of a patient, for example a bend or a hook.
  • the dental or dental surgical treatment device in particular the impedance-based detection device or the handpiece, preferably comprises at least one device or element for secure transmission of the periodic, in particular sinusoidal, electrical measurement signal, in particular to or in the direction of the evaluation unit of the treatment device.
  • This is particularly advantageous when the measurement signal is very weak, for example in the range of only a few millivolts, and / or when the measurement signal is passed through the handpiece and / or the drive device during transmission and thereby disturbing influences, for example electromagnetic Fields, is exposed.
  • the impedance-based detection device or the electrical circuit of the impedance-based detection device comprises: a first electrical conductor for supplying the first measuring electrode with periodic, in particular sinusoidal, electrical energy, a second electrical conductor for supplying the second measuring electrode with periodic, in particular sinusoidal, electrical energy a third electrical conductor for transmitting the periodic, in particular sinusoidal, electrical measurement signal, in particular to an evaluation unit of the impedance-based detection device, and a fourth electrical conductor for transmitting the periodic, in particular sinusoidal, electrical measurement signal, in particular to the evaluation unit of the impedance-based detection device.
  • the third electrical conductor is electrically connected to the first measuring electrode, optionally directly or via the first electrical conductor.
  • the fourth electrical conductor is electrically connected to the second measuring electrode, optionally directly or via the second electrical conductor.
  • two electrical conductors are electrically connected to the third electrical conductor for supplying the first measuring electrode with periodic, in particular sinusoidal, electrical energy
  • a second electrical conductor for supplying the second measuring electrode with periodic, in
  • the first and the second conductor or supply conductor provided which the periodic, in particular sinusoidal, electrical energy or the fundamental harmonic Transmit excitation signal to the first and second measuring electrode, and two other (separate) electrical conductors (the third and the fourth conductor) or measuring conductors, which transmit the measuring signal provided.
  • This four-wire system increases the safety and reliability of the transmission of the measurement signal, in particular a very weak measurement signal, compensates and / or reduces measurement errors and therefore preferably forms a device described above for secure transmission of the periodic, in particular sinusoidal, electrical measurement signal.
  • the first measuring electrode preferably has at least part of the first and third electrical conductors and the second measuring electrode has at least part of the second and fourth electrical conductors.
  • at least a portion of the first and third electrical conductors provided in or on the first measuring electrode are electrically insulated, in particular surrounded by an electrical insulating material.
  • at least a portion of the provided in or on the second measuring electrode second and fourth electrical conductor is electrically insulated, in particular surrounded by an electrical insulation material.
  • the periodic, in particular sinusoidal, electrical energy, in particular the fundamental harmonic excitation, and / or the periodic, in particular sinusoidal, electrical measurement signal over at least a part of the tool holder and / or at least a part of a drive train of the handpiece, for Example of a shaft and / or a transmission element to transfer to or from the first measuring electrode.
  • the tool holder and / or at least a part of a drive train is electrically connected to the first measuring electrode and / or the third electrical conductor.
  • the electric circuit or an evaluation unit of the impedance-based detection device is arranged in the handpiece, in particular in a hollow sleeve, for example the grip or outer sleeve, and / or in the hollow handpiece head of the handpiece.
  • a hollow sleeve for example the grip or outer sleeve
  • the handpiece head of the handpiece is arranged in the handpiece, in particular in a hollow sleeve, made of an electrically insulating material or provided with an electrically insulating coating, if the handpiece or the sleeve of an electrically conductive material, for example, metal, see.
  • the electrically insulating material or the electrically insulating coating comprises, for example, a ceramic material, a plastic material, glass and / or a glass-ceramic material.
  • at least a part of the first and / or third electrical conductor is arranged in the handpiece or guided through the interior of the handpiece and / or arranged on the handpiece, in particular fastened.
  • the handpiece comprises a hollow sleeve, for example handle or outer sleeve, and / or a hollow handpiece head, through which at least a part of the first and / or third electrical conductor are guided.
  • at least a portion of the first and / or third electrical conductor is electrically isolated from the handpiece (head), in particular surrounded by an electrical insulation material.
  • first and / or third electrical conductor removed or independent of the handpiece.
  • the contacting of the first measuring electrode by the first and / or third electrical conductor is outside the handpiece.
  • the handpiece comprises a coupling device, via which it is detachably connected to a control device and / or a supply device and / or at least part of the impedance-based detection device, in particular the evaluation unit.
  • At least one electrical contact is provided on the coupling device, which is electrically connected to the guided through the interior of the handpiece and / or disposed on the handpiece first and / or third electrical conductor, so that the first and / or third electrical conductor via the electrical contact with the control device and / or a supply device and / or at least part of the impedance-based detection device is / are connectable, in particular for transmitting the periodic, in particular sinusoidal, electrical measurement signal and / or a control signal derived from or based on the measurement signal and / or or the periodic, in particular sinusoidal, electrical energy, in particular the fundamental harmonic excitation signal.
  • the handpiece comprises at least one of the following components that is communicatively or electrically connected to the first measuring electrode and / or to the third electrical conductor: a measuring signal amplifier, an analog-digital
  • the impedance-based detection device comprises a
  • Evaluation unit which is in particular designed to receive, process and evaluate the periodic, in particular sinusoidal, electrical measurement signal.
  • the evaluation unit comprises a microcontroller or is formed by a microcontroller.
  • the evaluation unit or the microcontroller comprise, for example, a measuring signal amplifier, an analog-to-digital converter, a measuring signal filter, a comparator and / or a memory element.
  • parameters and / or data records assigned to a specific tissue are stored in the memory element.
  • the microcontroller or comparator is configured to compare these stored parameters and / or datasets with the measurement signals supplied by the impedance-based detection device (and specific to a particular tissue) to thereby detect dental tissue and / or an anomaly of dental tissue.
  • the impedance-based detection device determines the amplitude, in particular an amplitude extreme value, of the electrical voltage of the periodic, in particular sinusoidal, measuring signal applied to the first and second measuring electrodes for detecting dental tissue and / or an anomaly on dental tissue and / or the phase shift of electrical voltage and the electric current of the periodic, in particular sinusoidal, applied to the first and second measuring electrode measuring signal.
  • the periodic, in particular sinusoidal, measurement signal comprises several harmonics (fractions).
  • the impedance-based detection device evaluates at least one harmonic of the periodic, in particular sinusoidal, electrical measurement signal for detecting dental tissue and / or an anomaly on dental tissue, for example the amplitude or the amplitude extreme value of the at least one harmonic , Particularly preferably evaluates (or compares) the impedance-based Detektionsvornchtung, in particular the evaluation, for detecting dental tissue and / or an anomaly on dental tissue at least one parameter of at least one harmonic in relation to at least one parameter of the fundamental of the transmitted to the two measuring electrodes periodic, in particular sinusoidal, electrical energy or the fundamental harmonic excitation signal.
  • the impedance-based detection device for detecting dental tissue and / or an anomaly on dental tissue evaluates (or compares) at least one parameter of at least one first harmonic in relation to at least one parameter of a second harmonic.
  • the at least one evaluated or compared parameter comprises the amplitude, in particular the amplitude extreme value, the fundamental frequency and the at least one harmonic component.
  • the electrical energy supply device in particular the microcontroller of the impedance-based detection device, is designed to supply the first measuring electrode and the second measuring electrode with periodic, in particular sinusoidal, electrical energy of different frequencies and / or different electrical voltages, thus in particular measuring signals at different frequencies and / or or to get electrical voltages.
  • the impedance-based detection device in particular the evaluation unit, is designed to receive and evaluate measurement signals of the different frequencies and / or different electrical voltages according to the above for detecting dental tissue and / or an anomaly of dental tissue. This advantageously increases the number of determinable tissues (types) or anomalies and / or the detection of dental tissue and / or anomalies becomes more accurate.
  • the frequency range of the different frequencies preferably lies in the one to three-digit kilohertz range.
  • the impedance-based detection device in particular the evaluation unit, is designed to evaluate the periodic, in particular sinusoidal, electrical measurement signal with non-linear, dielectric impedance spectroscopy and / or Fourier transformation.
  • the harmonics (fractions) or the at least one harmonic of the periodic, in particular sinusoidal, electrical measuring signal can be detected and evaluated in an advantageous manner.
  • the handpiece is designed to deliver a liquid to a treatment site or a dental or dental surgical tool or the first measuring electrode received in the tool holder or to supply a dental or dental surgical tool or the first measuring electrode received in the tool holder with liquid.
  • the liquid comprises distilled or deionized water.
  • the liquid delivered and delivered to the tip of the tool / first measuring electrode and to the treatment site causes an enlargement of the area of the element with predominantly capacitive functionality or of the element which can be represented as a (lossy) capacitor, in particular in an equivalent circuit (ie the liquid forms a) Part of the electrode area of this element / capacitor), resulting in the improvement of tissue detection.
  • the dental or dental surgical treatment device in particular the handpiece, comprises a connection to a liquid source, in particular to a source of deionized or distilled water.
  • the treatment device itself comprises a liquid source, in particular a source of deionized or distilled water, for example a container of deionized or distilled water.
  • the handpiece has a fluid conduit, particularly in the hollow sleeve, for example the handle or outer sleeve, and / or in the hollow handpiece head, which conducts the fluid along or through the handpiece.
  • the handpiece or the liquid line is connected via the coupling device of the handpiece with the liquid source or the connection to the liquid source.
  • a fluid tube connects the handpiece, the fluid conduit, or the coupling device to the fluid source or port.
  • the handpiece comprises at least one opening or nozzle for
  • the handpiece comprises in particular in the interior of the handpiece, a transfer area, at which the liquid is transferred from the liquid line into or onto a dental or dental surgical tool or the first measuring electrode accommodated in the tool holder.
  • the transfer region comprises, for example, a chamber which is supplied with liquid from the liquid line of the handpiece and from which the liquid flows along the outside of the tool or the first measuring electrode in the direction of the treatment site or through openings in the tool or the measuring electrode into an inner bore of the Tool or the measuring electrode flows.
  • the transfer region comprises one end of the tool or first measuring electrode having an opening connected to an inner bore of the tool or the measuring electrode so that the liquid line of the handpiece projects through the opening into the inner bore of the tool or the measuring electrode, so that the Fluid can pass directly from the liquid line of the handpiece into the inner bore of the tool or the measuring electrode.
  • the dental or dental surgical treatment device comprises a display, in particular a monitor, on which, for example, one or more types of the dental tissue detected by the impedance-based detection device and / or an anomaly on dental tissue and / or measured values of the impedance-based detection device are displayed.
  • the display device is communicatively connected to the impedance-based detection device, in particular the evaluation unit.
  • FIG. 1 shows a first embodiment of a dental or dental surgery treatment device for the detection of dental tissue and / or an anomaly on dental tissue;
  • FIG. 2 shows a second exemplary embodiment of a dental or dental surgical treatment apparatus for the detection of dental tissue and / or an anomaly on dental tissue;
  • FIG. 3 shows a third exemplary embodiment of a dental or dental surgical treatment apparatus for the detection of dental tissue and / or an anomaly on dental tissue;
  • Figure 4 shows a fourth embodiment of a dental or dental surgery
  • Treatment device for the detection of dental tissue and / or an anomaly on dental tissue.
  • the common features of the dental or dental surgical treatment devices 1-4 of FIGS. 1-4 are described below.
  • the dental or dental surgical treatment devices 1-4 of FIGS. 1-4 are each in operation, i. during a detection of dental tissue and / or an anomaly on dental tissue and / or during a treatment of a tooth.
  • the tooth 20 is treated in vivo, so it is located in the jaw 21 or oral cavity of a patient.
  • the dental or dental surgical treatment devices 1-4 each comprise a handpiece 5 with a movable tool holder 6, a drive device 7 for moving the tool holder 6 and an impedance-based detection device 8, which is designed to receive a periodic, in particular sinusoidal, electrical measurement signal received and evaluated for the detection of dental tissue and / or an anomaly on dental tissue.
  • the drive device 7 is preferably designed as an electric motor, which is either arranged integrally in the handpiece 5 or forms a separate, connectable to the handpiece 5 component.
  • Part of the impedance-based detection device 8 are a first measuring electrode 9 and a second measuring electrode 10, which can be supplied by an electrical power supply device 1 1 with a periodic, in particular sinusoidal, electrical energy.
  • the first measuring electrode 9 and the second measuring electrode 10 form, preferably with a liquid located at the two measuring electrodes 9, 10, the electrically conductive part of an element 19 with predominantly capacitive functionality, in particular an element which can be represented as a (lossy) capacitor in an equivalent circuit diagram.
  • the dielectric or the electrically poorly conducting component of this element / capacitor 19, which spatially separates the two measuring electrodes 9, 10, comprises at least the tissue to be examined, in particular at least one tissue or type of tissue of the tooth 20, for example the Tooth enamel or dentin, and / or an anomaly on the tooth 20 or tooth 20, for example, carious tissue, tartar or plaque.
  • the element with predominantly capacitive functionality / the capacitor 19 forms a capacitive resistance or reactance of an electrical circuit 18 which will be described below.
  • the first measuring electrode 9 has a dental or dental surgical tool 12 which can be inserted into the tool holder 6 of the handpiece 5.
  • the tool 12 is designed, for example, as a rotating drill.
  • the second measuring electrode 10 has an am Body, in particular with the mouth or the jaw 21, a patient connectable body electrode.
  • the impedance-based detection apparatus 8 comprises an electrical circuit 18 which, in addition to the above-mentioned measuring electrodes 9, 10 or the element with predominantly capacitive functionality / the capacitor 19, an electrical energy supply device 1 1 for supplying the first measuring electrode 9 and the second measuring electrode 10 with periodic, in particular sinusoidal, electrical energy.
  • the electrical power supply device 1 1 is preferably connected to a microcontroller 17 or formed as part of a microcontroller 17.
  • the electrical power supply device 1 1 generates a fundamental-harmonic excitation or a fundamental harmonic, electrical excitation signal with which the two measuring electrodes 9, 10 can be supplied via electrical conductors.
  • the electrical power supply device 1 generates 1 fundamental harmonic, electrical excitation signals with at least two different frequencies.
  • the impedance-based Detektionsvornchtung 8 further comprises an evaluation unit 22, which is electrically and / or communicatively connected to the electrical circuit 18 or is formed as part of the electrical circuit 18.
  • the evaluation unit 22 is designed, for example, to receive, process and evaluate the periodic, in particular sinusoidal, electrical measurement signal and preferably to generate a control signal derived from or based on the measurement signal.
  • the evaluation unit 22 comprises a microcontroller 17 or is formed by a microcontroller 17.
  • the evaluation unit 22 or the microcontroller 17 comprise, for example, a measuring signal amplifier, an analog-to-digital converter, a measuring signal filter, a comparator and / or a memory element.
  • the memory element of the evaluation unit 22 stores parameters and / or data records assigned to a specific tissue.
  • the microcontroller 17 or the comparator is designed to compare these stored parameters and / or data sets with the measurement signals supplied by the impedance-based detection device 8 (and specific for a specific tissue), thereby detecting dental tissue and / or an anomaly on dental tissue ,
  • the evaluation unit 22 is preferably connected to a display 23 or has such a display 23.
  • the display 23 comprises, for example, a monitor or lighting elements.
  • the display 23 is designed, in particular, for the type of dental tissue recognized by the impedance-based detection device 8 and / or a dental tissue Anomaly on dental tissue and readings of the impedance-based detection device 8 display.
  • the dental or dental surgical treatment device 1 of FIG. 1 has (not more than) two electrical conductors 24, 25, which are designed to apply both the periodic, in particular sinusoidal, electrical energy, in particular the harmonic excitation, to the two measuring electrodes 9, 10 also to transmit the periodic, in particular sinusoidal, electrical measurement signal to the evaluation unit 22, in particular the microcontroller 17th
  • the electrical conductor 24 connected to the tool 12 or the first measuring electrode 9 is arranged in the handpiece 5 and the drive device 7.
  • the electrical conductor 24 can also be arranged partially or completely outside the handpiece 5 and / or the drive device 7.
  • Deviating from the dental or dental surgical treatment devices 2-4 of Figures 2-4 are each provided four electrical conductors: a first electrical conductor 13 for supplying the first measuring electrode 9 with periodic, especially sinusoidal, electrical energy, a second electrical conductor 14 for supply the second measuring electrode 10 with periodic, in particular sinusoidal, electrical energy, a third electrical conductor 15 for transmitting the periodic, in particular sinusoidal, electrical measuring signal to the evaluation unit 22, in particular the microcontroller 17, and a fourth electrical conductor 16 for transmitting the periodic, in particular sinusoidal, electrical measurement signal to the evaluation unit 22, in particular the microcontroller 17.
  • the first and second electrical conductors 13, 14 directly to the electrical power supply device 1 1 and the third and fourth electrical Head 15, 16 directly to the evaluation unit 22, in particular the microcontroller 17, electrically connected (see Figure 3).
  • the electrical conductors 13, 15 and 14, 16 can, as shown in FIGS. 2-4, be completely separated from one another and, in particular, be connected to the first measuring electrode 9 or the second measuring electrode 10 separately from one another. Alternatively, only the electrical conductors 13, 14 are electrically connected directly to the first measuring electrode 9 and the second measuring electrode 10 and the electrical conductor 15 is electrically connected to the electrical conductor 13 and the electrical conductor 16 is electrically connected to the electrical conductor 14.
  • both electrical conductors 13, 15 are arranged in the handpiece 5. Also contact both electrical conductors 13, 15 separately from each other, the first measuring electrode 9 or the tool holder 6 within the handpiece 5, in particular within the handpiece head. In the embodiment according to FIG. 4, both electrical conductors 13, 15 are arranged outside the handpiece 5 and both electrical conductors 13, 15 contact the first measuring electrode 9 outside the handpiece 5 separately from one another.
  • both electrical conductors 13, 15 are arranged outside the handpiece 5 and both electrical conductors 13, 15 contact the first measuring electrode 9 outside the handpiece 5 separately from one another.
  • one of the two electrical conductors 13, 15 is arranged in the handpiece 5 and contacts the first measuring electrode 9 or the tool holder 6 within the handpiece 5, while the other of the two electrical conductors 13, 15 is arranged outside the handpiece 5 and the first measuring electrode 9 contacted outside the handpiece 5.
  • the exemplary embodiment of FIG. 2 also shows that at least part of the evaluation unit 22, for example a measuring signal amplifier, an analog-to-digital converter, a measuring signal filter or a microcontroller 17, or the entire evaluation unit 22 are arranged in the handpiece 5 has.
  • the two electrical conductors 14, 16 are connected to the arranged in the handpiece 5 part of the evaluation unit 22 or the entire evaluation unit 22.
  • at least a portion of the electrical conductors 14, 16 is thus arranged in the handpiece 5.
  • An arrangement of a part of the evaluation unit 22 or the entire evaluation unit 22 in the handpiece 5 is of course also possible in a two-conductor embodiment according to FIG.

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  • Health & Medical Sciences (AREA)
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  • Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un dispositif de traitement dentaire ou de chirurgie dentaire (1-4), comprenant : une pièce à main (5) dotée d'un porte-outil (6) apte à être animé d'un mouvement, un dispositif d'entraînement (7) vers le porte-outil (6) animé d'un mouvement et un dispositif de détection (8) basé sur l'impédance, conçu pour recevoir un signal de mesure électrique périodique, notamment sinusoïdal et pour la détection d'un tissu dentaire et/ou l'évaluation d'une anomalie du tissu dentaire.
PCT/EP2017/067473 2016-07-12 2017-07-12 Dispositif de traitement dentaire ou de chirurgie dentaire destiné à la détection d'un tissu dentaire et/ou d'une anomalie du tissu dentaire WO2018011241A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16179020.9 2016-07-12
EP16179020 2016-07-12

Publications (1)

Publication Number Publication Date
WO2018011241A1 true WO2018011241A1 (fr) 2018-01-18

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PCT/EP2017/067473 WO2018011241A1 (fr) 2016-07-12 2017-07-12 Dispositif de traitement dentaire ou de chirurgie dentaire destiné à la détection d'un tissu dentaire et/ou d'une anomalie du tissu dentaire

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Country Link
WO (1) WO2018011241A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800005462A1 (it) * 2018-05-17 2019-11-17 Un dispositivo impedenziometrico per valutare il corretto consolidamento di impianti endossei, preferibilmente protesi endossee di tipo dentale
CN113164095A (zh) * 2018-12-14 2021-07-23 高露洁-棕榄公司 用于使用电阻抗断层成像进行口腔健康监测的系统和方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442033A (en) * 1945-07-28 1948-05-25 John E Brantly Fluid circulating dental drill and bit
WO1993018402A1 (fr) 1992-03-04 1993-09-16 University College Of Wales, Aberystwyth Appareil et procede d'analyse ou de controle
US5508203A (en) * 1993-08-06 1996-04-16 Fuller; Milton E. Apparatus and method for radio frequency spectroscopy using spectral analysis
US5902105A (en) * 1994-06-09 1999-05-11 Kabushiki Kaisha Morita Seisakusho Dental treatment apparatus with a root canal length measurement function
US20040158169A1 (en) * 2002-07-26 2004-08-12 Aseptico, Inc. Detecting and indicating a proximity of a dental instrument to a tooth apical foramen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442033A (en) * 1945-07-28 1948-05-25 John E Brantly Fluid circulating dental drill and bit
WO1993018402A1 (fr) 1992-03-04 1993-09-16 University College Of Wales, Aberystwyth Appareil et procede d'analyse ou de controle
US5508203A (en) * 1993-08-06 1996-04-16 Fuller; Milton E. Apparatus and method for radio frequency spectroscopy using spectral analysis
US5902105A (en) * 1994-06-09 1999-05-11 Kabushiki Kaisha Morita Seisakusho Dental treatment apparatus with a root canal length measurement function
US20040158169A1 (en) * 2002-07-26 2004-08-12 Aseptico, Inc. Detecting and indicating a proximity of a dental instrument to a tooth apical foramen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800005462A1 (it) * 2018-05-17 2019-11-17 Un dispositivo impedenziometrico per valutare il corretto consolidamento di impianti endossei, preferibilmente protesi endossee di tipo dentale
CN113164095A (zh) * 2018-12-14 2021-07-23 高露洁-棕榄公司 用于使用电阻抗断层成像进行口腔健康监测的系统和方法

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