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DE10165016B4 - Method and device for detecting carious softening of teeth - Google Patents

Method and device for detecting carious softening of teeth Download PDF

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Publication number
DE10165016B4
DE10165016B4 DE10165016A DE10165016A DE10165016B4 DE 10165016 B4 DE10165016 B4 DE 10165016B4 DE 10165016 A DE10165016 A DE 10165016A DE 10165016 A DE10165016 A DE 10165016A DE 10165016 B4 DE10165016 B4 DE 10165016B4
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electrical signals
transducer
supplied
sound
instrument
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Christian Willers
Thomas Huth-Fehre
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Huth-Fehre Thomas Drrernat
Willers Christian Drmeddent
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Huth-Fehre Thomas Drrernat
Willers Christian Drmeddent
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Priority to DE10165016A priority Critical patent/DE10165016B4/en
Priority to DE2001164044 priority patent/DE10164044B4/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/08—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring roughness or irregularity of surfaces
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/36—Detecting the response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/42—Detecting the response signal, e.g. electronic circuits specially adapted therefor by frequency filtering or by tuning to resonant frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
    • G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/01—Indexing codes associated with the measuring variable
    • G01N2291/015—Attenuation, scattering

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Biomedical Technology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mathematical Physics (AREA)
  • Biophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Verfahren zur Erfassung von kariösen Erweichungen an Zähnen, bei dem der durch Bearbeitung des Zahns mittels eines mechanischen Bearbeitungsinstrumentes, wie einem Bohrer oder Fräser entstehende Schall ausgewertet wird, wobei ein am Halter des mechanischen Bearbeitungsinstruments befestigter elektronischer Schallwandler den bei der Bearbeitung entstehenden Schall aufnimmt und die vom Schallwandler gelieferten elektrischen Signale in eine akustische, optische oder taktile Anzeige der Kariesfreiheit umgesetzt werden. method for detecting carious softening on teeth, in which by machining the tooth by means of a mechanical Machining instrument, such as a drill or router Sound is evaluated, with one on the holder of the mechanical processing instrument fixed electronic transducer during processing absorbs the sound produced and that supplied by the transducer electrical signals in an acoustic, optical or tactile display of Caries Freedom be implemented.

Description

Die Erfindung betrifft ein Verfahren für Erfassung von kariösen Erweichungen an Zähnen gemäß Anspruch 1 und eine Anodrnung gemäß Anspruch 5.The The invention relates to a method for detecting carious softening on teeth according to claim 1 and an arrangement according to claim 5th

Karies ist die am weitesten verbreitete Zivilisationskrankheit. Hierbei kommt es infolge einer Vergärung von vorhandenem Zucker durch spezifische Keime auf der Zahnoberfläche zu einer Säurebildung mit Demineralisation der infizierten Zahnhartsubstanz (1). Kariös infiziertes Zahnhartgewebe verändert sehr deutlich seinen Härtegrad und die Oberflächenrauhigkeit in den befallenen Regionen. Therapeutisch wird das kariös erweichte Dentin mechanisch mit rotierenden Bohrern oder Fräsern abgetragen oder in jüngster Zeit mittels Applikation von Laserenergie denaturiert.Caries is the most common civilization disease. in this connection it comes as a result of fermentation from existing sugar by specific germs on the tooth surface to one Acid formation with Demineralization of infected hard tooth substance (1). Carious infected Dental hard tissue changed very clearly its degree of hardness and the surface roughness in the affected regions. Therapeutically this is softened carious Dentin removed mechanically with rotating drills or milling cutters or more recently Time denatured by application of laser energy.

Für eine Verlaufskontrollen der Therapie ist eine einfache und zugleich zuverlässige Oberflächenkontrolle gesucht, die dem Behandler direkt anzeigt, wann an einer Stelle alles erweichte Dentin abgetragen ist.For a history checks Therapy is a simple yet reliable surface control which directly indicates to the practitioner when in one place all softened dentin has been worn off.

Eine Erfolgskontrolle findet routinemäßig mittels einer mechanischen Sonde statt, die im Wechsel mit dem Behandlungsinstrument eingesetzt wird und auf gesunder Zahnsubstanzharten Widerstand ertastet (1). Verbliebenes kariös erweichtes Dentin läßt sich somit durch Ertasten lokaler Härteunterschiede auch in eng begrenzten Regionen selektieren, setzt jedoch ein sehr differenziertes taktiles Empfinden des Behandlers voraus.A Success control routinely means a mechanical probe instead, alternating with the treatment instrument is used and feels resistance to healthy tooth substance hard (1). Remaining carious softened dentin leaves thus by sensing local hardness differences but also in very limited regions select, but sets a very differentiated tactile sensation of the practitioner.

Infizierte Zahnsubstanz besitzt auch eine höhere elektrische Leitfähigkeit als gesunde. In der Schrift DE 3021302 C2 wird ein Gerät vorgestellt, das diese Leitfähigkeit reproduzierbar misst und dem Behandler mittels eines Kopfhörers als Tonfrequenz mitteilt.Infected tooth substance also has a higher electrical conductivity than healthy ones. In Scripture DE 3021302 C2 a device is presented, which reproducibly measures this conductivity and informs the practitioner by means of a headphone as a sound frequency.

Einen weiteren, erst kürzlich entwickelten Ansatz bildet die Spektralanalyse der Zahnsubstanz (2).a more, just recently developed approach is the spectral analysis of the tooth substance (2).

Aufgabe der vorliegenden Erfindung ist es, dem behandelnden Zahnarzt ein Instrument an die Hand zu geben, mit dem er schon während der Behandlung verzugs- und zweifelsfrei den Härtegrad und die Oberflächenbeschaffenheit des Zahnhartgewebes beurteilen kann, ohne das Bearbeitungsinstrument absetzen zu müssen.task It is the object of the present invention to provide the attending dentist To give an instrument with which he already during the Treatment without distortion and doubt the hardness and the surface finish of the hard dental tissue without the machining instrument to have to settle.

Diese Aufgabe wird erfindungsgemäß für das Verfahren durch die Merkmale des Anspruchs 1 und für die Anordnung durch die merkmale des anspruchs 5 gelöst.These Task is according to the invention for the process by the features of claim 1 and for the arrangement by the features the challenging 5 solved.

Kernpunkt der Erfindung ist, daß der bei Berührung der zu prüfenden Oberfläche mit harten Gegenständen enstehende Schall ausgewertet wird. Während des mechanischen Bearbeitens (Fräsens, bzw. Rohrens) enstehen typische Geräusche. Dieser Schall pflanzt sich nun auf zwei Wegen fort: zum einen durch das Behandlungsinstrument und zum anderen durch den Zahn. Vom Zahn aus koppelt er recht effizient an den Kieferknochen und weiter an die benachbarten Zähne. Sowohl von diesen Zähnen, als auch vom Halter des Instruments kann er mit einem elektronischen Wandler abgenommen und in ein elektrisches Signal übertragen werden. Dieses wird nun elektronisch verstärkt und dem Behandler z.B. mittels eines Lautsprechers oder Kopfhörers zu Gehör gebracht.crux the invention is that the On contact the one to be tested surface with hard objects resulting sound is evaluated. During mechanical processing (Milling, or Rohrens) cause typical noises. This sound is now propagated in two ways: on the one hand the treatment instrument and the other by the tooth. From the tooth From there, he connects quite efficiently to the jawbone and on to the adjacent teeth. Both of these teeth, as well as from the holder of the instrument he can with an electronic Transducer removed and transferred to an electrical signal become. This is now amplified electronically and the practitioner e.g. by means of a loudspeaker or a headphone.

Eine erste Verbesserungsmöglichkeit besteht darin, das elektronische Signal vor der Hörbarmachung frequenzspezifisch zu filtern, wie dies in der Musiktechnik mit sogenannten Equalizer geschieht.A first improvement option It is the electronic signal before the audition frequency-specific filtering, as in music so-called equalizer happens.

Eine zweite Verbesserungsmöglichkeit besteht darin, den Pegel einiger ausgewählter Frequenzen als Entscheidungsmerkmal zur Ansteuerung einer optischen, akustischen oder taktilen Anzeige zu verwenden.A second improvement option is the level of some selected frequencies as a decision feature for controlling an optical, acoustic or tactile display to use.

Eine dritte Verbesserungsmöglichkeit besteht darin, das Signal zu digitalisieren und in einem Auswerterechner z. B. einer Fourieranalyse (FFT) zu unterziehen, oder von neuronalen Netzen oder: anderen chemometrischen Auswertealgorithmen analysieren zu lassen, um denn Behandler die Kariesfreiheit direkt optisch, akustisch oder taktil zu übermitteln.A third improvement option consists in digitizing the signal and in an evaluation computer z. B. a Fourier analysis (FFT) to undergo or neural Networks or: other chemometric analysis algorithms to let the practitioner see the caries freedom directly visually, to convey acoustically or tactilely.

Literatur: Literature:

  • (1) PILZ, M.E.W.: Praxis der Zahnerhaltung und oralen Prävention. Carl Hanser Verlag, München, Wien. 1985, S. 146–153.(1) PILZ, M.E.W .: Practice of tooth preservation and oral prevention. Carl Hanser Verlag, Munich, Vienna. 1985, pp. 146-153.
  • (2) KRAUSE, F., BRAUN, A. und FRENTZEN, M.: Laserfluoreszenzdiagnostik in der Paradontologie. In: Deutscher Zahnärztekalender, 2002, Deutscher Zahnärzteverlag DÄV, Köln, S. 178–183(2) KRAUSE, F., BROWN, A. and FRENTZEN, M .: Laser Fluorescence Diagnosis in paradontology. In: German Dentists' Calendar, 2002, German Dentists DÄV, Cologne, p. 178-183

Claims (6)

Verfahren zur Erfassung von kariösen Erweichungen an Zähnen, bei dem der durch Bearbeitung des Zahns mittels eines mechanischen Bearbeitungsinstrumentes, wie einem Bohrer oder Fräser entstehende Schall ausgewertet wird, wobei ein am Halter des mechanischen Bearbeitungsinstruments befestigter elektronischer Schallwandler den bei der Bearbeitung entstehenden Schall aufnimmt und die vom Schallwandler gelieferten elektrischen Signale in eine akustische, optische oder taktile Anzeige der Kariesfreiheit umgesetzt werden. Method for detecting carious softening on teeth, in which by machining the tooth by means of a mechanical Machining instrument, such as a drill or router Sound is evaluated, with an attached to the holder of the mechanical processing instrument electronic sound transducer resulting from the processing Absorbs sound and supplied by the transducer electrical Signals in an acoustic, optical or tactile indication of caries freedom be implemented. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Signalpegel der gelieferten elektrischen Signale in mindestens einem Frequenzbereich als Entscheidungsmerkmal zur Ansteuerung der akustischen, optischen oder taktilen Anzeige verwendet wird. A method according to claim 1, characterized in that the Signal level of the supplied electrical signals in at least one Frequency range as a decision-making feature for controlling the acoustic, optical or tactile indicator is used. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die gelieferten elektrischen Signale digitalisiert werden und mittels einer Fourieranalyse analysiert werden.A method according to claim 1 or 2, characterized in that the supplied electrical signals are digitized and by means of analyzed by a Fourier analysis. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die gelieferten elektrischen Signale digitalisiert werden und mittels neuronaler Netze oder anderer chemometrischer Auswertealgorithmen analysiert werden. A method according to claim 1 or 2, characterized in that the supplied electrical signals are digitized and by means of neural networks or other chemometric evaluation algorithms to be analyzed. Anordnung zur Durchführung eines Verfahrens zur Erfassung von kariösen Erweichungen an Zähnen mit einem mechanischen Bearbeitungsinstrument, wie Bohrer oder Fräser, zum Bearbeiten eines Zahns, mit einem elektronischen Schallwandler zum Aufnehmen des bei der Bearbeitung des Zahns mit dem mechanischen Bearbeitungsinstrument entstehenden Schalls, wobei der Schallwandler am Halter des mechanischen Bearbeitungsinstrumentes befestigt ist und mit einer Auswerteeinheit zur Umsetzung der vom Schallwandler gelieferten elektrischen Signale in eine akustische, optische oder taktile Anzeige verbunden ist. Arrangement for implementation a method for detecting carious softening of teeth with a mechanical processing instrument, such as drills or cutters, for Editing a tooth, with an electronic transducer for recording when machining the tooth with the mechanical processing instrument arising sound, the transducer on the holder of the mechanical Machining instrument is attached and with an evaluation unit to implement the electrical signals supplied by the transducer is connected in an acoustic, optical or tactile display. Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass die Auswerteeinheit einen Rechner zur Analyse der gelieferten elektrischen Signale entsprechend einer Fourieranalyse, neuronalen Netzen oder anderen chemometrischen Auswertealgorithmen aufweist.Arrangement according to claim 5, characterized in that the Evaluation unit a computer for analyzing the supplied electrical Signals according to a Fourier analysis, neural networks or has other chemometric evaluation algorithms.
DE10165016A 2001-12-24 2001-12-24 Method and device for detecting carious softening of teeth Revoked DE10165016B4 (en)

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Application Number Priority Date Filing Date Title
DE10165016A DE10165016B4 (en) 2001-12-24 2001-12-24 Method and device for detecting carious softening of teeth
DE2001164044 DE10164044B4 (en) 2001-12-24 2001-12-24 Method and device for detecting the surface roughness of dental hard tissue

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DE10165016A DE10165016B4 (en) 2001-12-24 2001-12-24 Method and device for detecting carious softening of teeth
DE2001164044 DE10164044B4 (en) 2001-12-24 2001-12-24 Method and device for detecting the surface roughness of dental hard tissue

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DE2001164044 Revoked DE10164044B4 (en) 2001-12-24 2001-12-24 Method and device for detecting the surface roughness of dental hard tissue

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7958775B2 (en) 2004-03-04 2011-06-14 Centre National De La Recherche Scientifique (Cnrs) Triboacoustic probe
BR112015024802B1 (en) * 2013-04-19 2021-03-16 Unilever Ip Holdings B.V oral treatment system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3021302C2 (en) * 1979-08-09 1991-02-07 K.K. Dental Electronics Kenkyujo, Tokio/Tokyo, Jp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653373A (en) * 1970-01-19 1972-04-04 Steven C Batterman Apparatus for acoustically determining periodontal health
DE4304170C2 (en) * 1993-02-12 1995-10-19 Isad Ingenieurbuero Gmbh Fuer Method and device for recognizing surface structures
US5951292A (en) * 1998-09-18 1999-09-14 Lee; Sheng Yang Method of detecting periodontal disease by detecting the natural frequency of a tooth.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3021302C2 (en) * 1979-08-09 1991-02-07 K.K. Dental Electronics Kenkyujo, Tokio/Tokyo, Jp

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Krause, F., Braun, A. u. Frentzen, M.: Laserfluor- eszenzdiagnostik in der Paradontologie. In: Deutscher Zahnärztekalender, 2002, Deutscher Zahn- ärzteverlag DÄV, Köln, S. 178-183
Krause, F., Braun, A. u. Frentzen, M.: Laserfluoreszenzdiagnostik in der Paradontologie. In: Deutscher Zahnärztekalender, 2002, Deutscher Zahnärzteverlag DÄV, Köln, S. 178-183 *
Pilz, M.E.W.: Praxis der Zahnerhaltung und oralen Prävention. Carl Hanser Verlag, München, Wien. 1985, S. 146-153 *

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DE10164044B4 (en) 2008-04-17

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