EP4468941A1 - Appareil et procédé de détection du biofilm dans la cavité buccale - Google Patents

Appareil et procédé de détection du biofilm dans la cavité buccale

Info

Publication number
EP4468941A1
EP4468941A1 EP22843712.5A EP22843712A EP4468941A1 EP 4468941 A1 EP4468941 A1 EP 4468941A1 EP 22843712 A EP22843712 A EP 22843712A EP 4468941 A1 EP4468941 A1 EP 4468941A1
Authority
EP
European Patent Office
Prior art keywords
opening
area
receiving space
legs
camera
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.)
Pending
Application number
EP22843712.5A
Other languages
German (de)
English (en)
Inventor
Andrei SHMELEV
Bernhard Rieder
Bernhard Moritz PICHLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Epitome GmbH
Original Assignee
Epitome 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 Epitome GmbH filed Critical Epitome GmbH
Publication of EP4468941A1 publication Critical patent/EP4468941A1/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
    • A61B1/247—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0062—Arrangements for scanning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4542—Evaluating the mouth, e.g. the jaw
    • A61B5/4547—Evaluating teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6844—Monitoring or controlling distance between sensor and tissue
    • 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
    • A61B5/7264—Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems
    • A61B5/7267—Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems involving training the classification device
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0012—Biomedical image inspection
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H30/00—ICT specially adapted for the handling or processing of medical images
    • G16H30/40—ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0406—Constructional details of apparatus specially shaped apparatus housings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0462—Apparatus with built-in sensors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/22—Arrangements of medical sensors with cables or leads; Connectors or couplings specifically adapted for medical sensors
    • A61B2562/225—Connectors or couplings
    • A61B2562/227—Sensors with electrical connectors
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20081—Training; Learning
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30004—Biomedical image processing
    • G06T2207/30036—Dental; Teeth

Definitions

  • the invention relates to a device and a method for detecting biofilm in the oral cavity.
  • this also includes electric toothbrushes with oscillating or vibrating bristle heads.
  • oral irrigators are known, in which plaque is intended to be removed via injected liquids. With toothbrushes, the possibility of error by the user is almost unlimited. In the case of the known oral irrigators, the performance had to be significantly reduced compared to old designs, since excessive liquid jet damage was caused to the gums. The oral irrigators, which do not damage, do not really clean either.
  • intraoral camera units it is known to use intraoral camera units to record optically recognizable conditions in the oral cavity.
  • solutions for intraoral camera units that are currently available on the market are too large to be used without further ado and also in the end user area.
  • the very close wavelength spectrum of the exciting and emitted light leads to a signal-to-noise ratio that is too low to ensure reliable detection. Reflections that occur due to focused lighting solutions and blurred images from the camera unit are currently only compensated for by a greater distance from the tooth to the sensor unit in the intraoral cameras on the market.
  • the object of the invention is to detect biofilm efficiently and in a space-saving manner in order to make parallel or subsequent cleaning more effective.
  • Another object is to provide a method for detecting biofilm.
  • biofilm is first made optically recognizable and then recorded according to location and intensity (amount).
  • the corresponding data consisting of the coordinates in the oral cavity and possibly an intensity/amount/layer thickness, can a) be stored and transferred to a cleaning device in order to enable targeted cleaning; b) stored and compared to previous readings or subsequent readings to document cleaning progress; c) stored and made available for therapeutic purposes, in particular anamnesis and analysis.
  • a sensor unit of a biofilm visualization device which after insertion into the oral cavity is passed over the teeth and thereby detects biofilm using a contrast medium and transmits the exact position and layer thickness, if necessary, etc. to the device.
  • the device consists of a handpiece, which can have a display on the side facing away from the user.
  • a mouthpiece On the side facing the user is a mouthpiece that is inserted into the oral cavity and guides the sensor unit over the teeth.
  • the method provides for the teeth to be stained with a fluorescein-based dye before detection.
  • the mouthpiece has at least one camera unit with a camera.
  • the camera unit alone has the dimensions 1x1x2.7 mm and the entire sensor unit, including a protective glass, PCB, filter and camera holder, has a diameter of 8 mm and a height of 3.8 mm. With these dimensions, the unit can be easily guided into an oral cavity.
  • an optical long-pass filter is preferably placed directly in front of the camera, which ideally has a limit wavelength of 480 nm to 530 nm and in particular around 510 nm and cuts off signals below it.
  • a band pass or short pass filter can be placed in front of the LEDs illuminating the area to be detected to limit/focus the wavelength spectrum of the LEDs.
  • a diffuser in particular in the form of a diffuser film, can be present between the PCB and the protective glass.
  • a polarizer and in particular a circular polarizer can be arranged in front of the LEDs and camera in order to minimize reflections.
  • long-pass filter short-pass filter
  • diffuser diffuser
  • polarizer polarizer
  • the device or the device itself can additionally have biometric security functions.
  • biometric security functions For example, it can be provided that a face recognition is carried out via a built-in camera or a fingerprint recognition is carried out via a fingerprint sensor.
  • the odontogram is recorded via corresponding optical or mechanical pressure sensors.
  • Mechanical pressure sensors are, for example, a sensor field which is arranged in a mouthpiece in such a way that it points towards the tooth crowns when in use.
  • the resolution and thus the number of sensors in the sensor field is selected in such a way that the bite situation can be recorded very precisely. Since the shape of the tooth is individual and unique, biometric recording can be carried out reliably by recording the tooth areas acting on the sensor surface.
  • the device can only be released and used by the intended user or by several users Users (possibly with different mouthpieces) the respective data are determined, forwarded and stored only for the recognized user.
  • the invention thus relates in particular to a device for optically detecting biofilm in the oral cavity, with at least one sensor unit being present, with the sensor unit having a camera whose optical detection range points into a recording space of the device, which is used to record surfaces that are detected shall be.
  • an optical long-pass filter is arranged in front of the camera, in particular directly in front of it, which preferably has a limit wavelength of 480 nm to 530 nm and in particular approximately 510 nm and cuts off signals below it.
  • the sensor unit has at least one LED for the purpose of illuminating a surface to be detected.
  • a development provides that a bandpass or shortpass filter is arranged in front of the at least one LED in order to limit/focus the wavelength spectrum of the at least one LED.
  • a development provides that at least one LED has a spectrum of 450-500 nm.
  • a further development provides that there is at least one further LED with a different spectrum, in particular with a white light spectrum.
  • a further development provides for a diffuser or a polarizer to be arranged in front of the optics of the camera in order to avoid reflections between a printed circuit board carrying the camera and/or the at least one LED and a protective glass.
  • a further development provides for a basic camera housing to be arranged on the circuit board in the area of the at least one LED, which, for example, reaches through the circuit board in the area of a reach-through opening, the basic camera housing being tubular with a first opening facing a surface to be detected and a diametrically opposite opening second opening, wherein the camera body is designed to rest on the protective pane with an end wall delimiting the first opening.
  • the device successively has a handpiece and a detection attachment with an elongate-cylindrical carrier, the one on one free end, a receiving area for a detection head is arranged which rotatably supports the detection head.
  • the detection head is constructed in the manner of a bridge, approximately in an inverted U-shape, with a base region and two legs extending therefrom.
  • the detection head is preferably designed in one piece and in particular the base area and the legs are designed in one piece with common walls.
  • a development provides that the base area and the legs are hollow and form one or more chambers for accommodating one or more sensor units and any necessary cabling, holding devices and the like.
  • a further development provides that the base area and the legs between them delimit a receiving space which serves to receive teeth, the receiving space correspondingly having an opening towards a tooth to be detected and one opening each on the side.
  • the receiving space is delimited by essentially flat inner walls of the legs and an inner wall of the base area running essentially orthogonally thereto, with the legs also having outer walls extending from the outer edges of the inner walls delimiting the openings, which extend into the outer wall of the base area go over wherein the outer walls are curved, so that the inner walls and the outer walls form or limit the one or more chambers.
  • the base area pointing away from the legs or pointing away from the receiving space, has on or in its outer wall, in particular, a cylindrical connection area, with the cylindrical connection area having an essentially round opening which is delimited by a peripheral edge, with an the peripheral edge is formed a projection which forms a rotation stop.
  • a further development provides that an opening towards the receiving space is formed opposite the cylindrical connection area, with a sensor unit being arranged in the chamber in the opening, with the sensor unit being arranged in such a way that the Protective glass covers the opening and accordingly the detection range of the camera protrudes into the recording space.
  • legs have openings which are directed towards the receiving space and accordingly a sensor unit is arranged there, the respective protective glasses closing off the openings to the receiving space and the sensor units being arranged inside the chamber.
  • a development provides that the detection areas of the sensor units in the legs point diametrically opposite one another into the receiving space and the detection area of the sensor unit in the base area points orthogonally to the opening in the receiving space.
  • the receiving area has a cylindrical opening which, in the assembled state, is directed towards a row of teeth to be examined, with a rotary bearing being arranged in the opening in such a way that the cylindrical connection area is hereby rotatably mounted within the cylindrical opening, with the cylindrical connection area protrudes with its opening first into the opening.
  • the sensor units have electrical lines which are routed through the chambers of the legs or the base area and the cylindrical connection area, with the sensor units being connected via the electrical lines to a power source within the handpiece and recorded image data or Coordinates or other data recorded by the cameras are thereby forwarded and either stored in the handpiece, processed or fed to further processing via suitable means for transmission, in particular a radio network or, when the handpiece is plugged into a base station, a conductive connection.
  • a development provides that storage media are present in the device, which can be exchanged if necessary, in particular memory cards.
  • a development provides that the electrical lines are dimensioned in such a way that the detection head can rotate within the device without the lines being overstretched.
  • a further development provides that, in order to set a sufficient distance between the cameras, in particular in the legs, from the surface to be recorded, and also ensure good guidance of the user when detecting the surfaces, spacer and guide elements are arranged, the spacer and guide elements being arranged in particular in the transition area from the inner walls to the outer walls.
  • a development provides that the guide elements extend into the receiving space, so that the guide elements bear against the outside and inside of the teeth.
  • the guide elements are made of a particularly biologically harmless material such as rubber or soft plastic or silicone.
  • a development provides that the guide elements can be designed to be exchangeable.
  • a further development provides that the guide elements are arranged adjacent to the receiving space or to the outer edges of the limbs on the outer walls of the limbs, either extending slightly outwards and then into the area of the receiving space or with free ends directly from the outer walls in extend the recording space.
  • optical long-pass filter is placed in front of the camera, which has a limit wavelength of 480 nm to 530 nm and in particular about 510 nm and cuts off signals below that.
  • a further development provides that a band-pass or short-pass filter is placed in front of the LED in order to limit/focus the wavelength spectrum of the LED.
  • a further development provides that a diffuser or a polarizer is arranged between the printed circuit board and the protective glass.
  • Another aspect of the invention relates to a method for detecting biofilm in the oral cavity using at least one sensor unit, the sensor unit having a camera which is directed with its optical detection range into a recording space of the device, which is arranged around surfaces that are detected should be.
  • a further development provides that an optical long-pass filter is arranged directly in front of the camera, which preferably has a limit wavelength of 480 nm to 530 nm and in particular approximately 510 nm and cuts off signals below this.
  • a development provides that at least one LED is used for the purpose of illuminating a surface to be detected.
  • a further development provides for an image analysis to be carried out comprising at least the following steps: segmentation of the tooth surface area (of an individual tooth or all visible teeth or partial sections of teeth) from other oral units, in particular gums and background, analysis of the area covered with biofilm and others oral features on the tooth surface such as demineralized areas, caries, fillings, calculus.
  • a development provides that trained pattern recognition is used.
  • the self-learning system soft preferably comprises a neural network, is given for learning.
  • a development provides that when the self-learning system has been given enough images with corresponding additional data and markings for learning, the system is able to mark new images of teeth independently in such a way that the tooth areas can be distinguished from non-tooth areas.
  • FIG. 1 a sensor unit according to the invention in a highly schematic section
  • FIG. 2 a detection head according to the invention with sensor units in a highly schematic section;
  • FIG. 3 the device according to the invention with handle and detection head, arranged in the area of incisors in a highly schematic view;
  • FIG. 4 the device according to FIG. 3 in a perspective view
  • FIG. 5 the device according to FIG. 3 in an enlarged perspective view of the detection head
  • FIG. 6 an embodiment of the detection head with guide elements in a first embodiment in a perspective view
  • FIG. 7 the detection head according to FIG. 6 with guide elements in a further one
  • FIG. 8 the detection head in a receiving area of the detection attachment
  • FIG. 9 the detection head with its housing in a schematic perspective view
  • FIG. 10 a sectioned half of the detection head in a perspective view
  • FIG. 11 a further embodiment with three sensor units arranged on a flexible printed circuit board (PCB) in a perspective view;
  • PCB printed circuit board
  • FIG. 12 the arrangement according to FIG. 11 in an orientation corresponding to a
  • FIG. 13 the arrangement according to FIG. 12 in a partially sectioned view
  • FIG. 14 the arrangement according to FIG. 13 in a further partially sectioned view.
  • FIG. 1 shows a sensor unit 1 according to the invention.
  • the sensor unit 1 has a printed circuit board 2 on which at least one LED 3 is arranged for the purpose of illuminating a surface to be detected.
  • a basic camera housing 4 is arranged in the area of the LED 3 and, for example, reaches through the printed circuit board 2 in the area of a reach-through opening 5 .
  • the basic camera housing 4 is shown as cylindrical, but it can also have any other shape in cross section.
  • the basic camera housing 4 is tubular with a first opening 6 facing an object to be examined and a second opening 7 diametrically opposite.
  • An optical filter 10 is preferably present between the protective pane 9 and the end wall 8 .
  • the actual camera unit 11 is arranged inside the basic camera housing 4 .
  • the camera unit 11 is, for example, a NanEye Module C or NanEye Module M camera from AMS AG or a comparable miniaturized camera.
  • it is a camera with a digital output, which is particularly suitable for endoscopy, for example.
  • the camera has dimensions of 1 ⁇ 1 ⁇ 2.7 mm, as a result of which the entire sensor unit 1 has a diameter of 8 mm and a height of 3.8 mm, for example, and is therefore very small.
  • the camera is designed in particular as a wide-angle camera and can cover a field of 120°.
  • a peripheral seal 12 can be arranged in the area of the opening 7 of the camera base housing 4 , which is designed in particular as an O-ring and is supported by a corresponding peripheral groove 13 .
  • the camera unit 11 can also be arranged directly on or on the printed circuit board 2 .
  • FIG. 2 shows a detection head 15 which, as will be shown later, is designed to be guided over teeth and adjacent gums in order to detect the biofilm situation.
  • the detection head 15 is constructed in the manner of a bridge, approximately in the form of an inverted egg, with a base region 16 and two legs 17 extending therefrom.
  • the detection head 15 is preferably formed in one piece and in particular the base area 16 and the legs 17 are formed in one piece by common walls.
  • the base area 16 and the legs 17 are hollow and form one or more chambers 18 for accommodating one or more sensor units 1 and any necessary cabling, holding devices and the like.
  • An approximately rectangular or trapezoidal receiving space 19 is delimited between these areas 16, 17 by the base region 16 and the legs 17, which is used to receive teeth, with the receiving space 19 correspondingly having an opening 20 towards a tooth to be detected and an opening 20 on each side Opening 21 has.
  • the receiving space 19 is delimited by essentially flat inner walls 22 of the legs 17 and an inner wall 23 of the base region 16 running essentially orthogonally thereto.
  • the limbs 17 also have outer walls 25 which extend from the outer edges 24 of the inner walls 22 delimiting the openings 20 , 21 and which merge into the outer wall 26 of the base region 16 .
  • the outer walls are arched, so that the inner walls 22, 23 and the outer walls 25, 26 form or delimit one or more chambers 18.
  • the base area 16 has an in particular cylindrical connection area 27 on or in its outer wall 26 pointing away from the legs 22 or the receiving space 19 .
  • the cylindrical connection area 27 accordingly has an essentially round opening 28 which is delimited by a peripheral edge 29 .
  • a projection 30 is formed on the peripheral edge 29, which forms a rotary stop, as will be explained later.
  • a sensor unit 1 Opposite the cylindrical connection area 27 there is an opening 31 towards the receiving space 19, a sensor unit 1 being arranged in the opening 31 in the chamber 18, the sensor unit 1 being arranged in such a way that the protective glass 9 covers the opening 31 and accordingly the detection area of the camera protrudes into the recording space 19 .
  • the legs 17 also have openings 31 which are directed towards the receiving space 19 and accordingly a sensor unit 1 is arranged there, the respective protective glasses 9 also closing off the openings 31 to the receiving space 19 and the sensor units being arranged inside the chamber 18 .
  • the detection areas of the sensor units 1 in the legs 17 protrude diametrically opposite into the receiving space 19 and the detection area of the sensor unit 1 in the base area 16 orthogonally thereto to the opening 20 and pointing into the receiving space 19.
  • FIG 3 the complete device 32 for detecting biofilm is shown in its working condition.
  • the device 32 has a handpiece 33 and a detection attachment 34 with an elongate-cylindrical carrier 35 which has a receiving area 37 for the detection head 15 at a free end 36 .
  • the overall appearance of the device 32 is thus similar to that of a conventional electric toothbrush, so that users are easily able to operate such a device, since the feel is not unfamiliar.
  • the receiving area 37 ( Figure 8) has a cylindrical opening 38 which, in the mounted state, is directed towards a row of teeth to be examined, with a rotary bearing 39 being arranged in the opening 38 in such a way that the cylindrical connecting area 27 can be rotated within the cylindrical opening 38 is mounted, wherein the cylindrical connection area 27 protrudes with its opening 28 in front into the opening 38 .
  • the sensor units 1 have electrical lines 40 which run through the chambers 18 of the legs 22 or the base area 16, the cylindrical connection area
  • the sensor units 1 are connected to a power source within the handpiece 33 via the electrical lines 40 .
  • the recorded image data or coordinates or other data recorded via the camera units 11 are thereby forwarded and either stored in the handpiece 33 or via suitable means of transmission, in particular a radio network or a conductive connection when the handpiece is plugged into a base station. sent for further processing.
  • corresponding storage media can be present in the device 32, which can be exchanged if necessary, for example memory cards on which the corresponding data are stored in order to then be able to process them further.
  • the electrical lines are dimensioned in such a way that the detection head 15 can be rotated within the device 32 without the lines being overstretched, the projection 30 on the peripheral edge 29 of the opening being used for this purpose
  • a possible rotation is thus limited to, for example, 320°, as a result of which it is possible to pick up the branches of the jaw without having to uncomfortably twist or pivot the handpiece 33 .
  • a rotation of about 210° is already sufficient, so that when the detection starts in the incisor area and the teeth are scanned ( Figures 3 - 5) from the incisor area to one molar area and back to the other molar area, the detection head 15 can be guided along the teeth accordingly .
  • rotation beyond 180° is also possible.
  • Distance and guide elements 42 can be arranged (FIGS. 6, 7) to set a sufficient distance between camera units 11, particularly in legs 17, and to ensure good guidance of the user when recording the surfaces.
  • the spacer and guide elements 42 are arranged in particular in the transition area from the inner walls 22,23 to the outer walls 25,26.
  • the guide elements 42 can extend into the receiving space 19 and a little in the direction of the opening 21, so that the guide elements 42 rest on the outside or inside of the teeth.
  • the guide elements 42 can be made from a particularly biologically harmless material, such as rubber or soft plastic or silicone, whereby the guide elements 42 can also be designed to be replaceable, on the one hand, in order to be adapted to individual tooth conditions and tooth geometries, but also to check them after wear or exchanged for hygienic reasons.
  • a particularly biologically harmless material such as rubber or soft plastic or silicone
  • the guide elements 42 are arranged adjacent to the receiving space 19 or to the outer edges 24 of the limbs 17 on outer walls 25 of the limbs 17 and extend from these either a little outwards and then in the area of the receiving space 19 or extend with free ends 43 directly from the outer walls into the receiving space 19.
  • the optical long-pass filter 10 is placed directly in front of the camera unit 11, which ideally has a cut-off wavelength of 480 to 530 nm and in particular around 510 nm and cuts off signals below it. Additionally (not shown) a band pass or short pass filter may be placed in front of the LEDs 3 to limit/focus the wavelength spectrum of the LEDs. It can also be advantageous to also install LEDs with a different spectrum in addition to the LEDs in the range from 450 to 500 nanometers.
  • a diffuser such as a diffuser film or a polarizer or both can also be arranged between the printed circuit board 2 and the protective glass 9 (not shown).
  • a polarizer can also be arranged directly in front of the camera unit 11 .
  • the device 32 comprising the handpiece 33 and the detection attachment 34 with the detection head 15, is arranged in an oral cavity such that the distance from the sensor unit 1 to the tooth surface varies between 1 and 5 mm. Detection is easily possible within this variation range.
  • the corresponding guide elements 42 help here, which, if necessary, set a minimum distance or maximum distance in interaction with one another.
  • three sensor units are arranged in the detection head 15 in order to be able to detect a half of a set of teeth in one go without interruption or removal.
  • the detection head can also be H-shaped, i.e. doubled, so that two openings 20 are diametrically opposed. In this way, both the lower and the upper half of the jaw can be recorded at the same time.
  • a stationary device instead of a device 32 with a handpiece 33, which is arranged stationary, for example in the professional field, i.e. at dentists and the patient is positioned for the purpose of anamnesis or preparation for professional tooth cleaning in a similar way to an X-ray machine and the stationary facility then carries out the recording.
  • the device 32 can also be designed without a handpiece 33 and accordingly only be held in the mouth.
  • FIGS. A further embodiment of the sensor units 1 according to the invention on a common flexible printed circuit board (PCB) 44 is shown in FIGS.
  • the sensor units 1 are arranged directly on the common printed circuit board 44 .
  • at least one LED 3 each is arranged around the basic camera housing 4 or, in the case of an SMD version, around the camera unit 11 , which are arranged directly on the printed circuit board 44 .
  • the sensor units themselves can be arranged on a support structure 45 of the flexible circuit board 44 in such a way that the circuit board 44 has sufficient rigidity for the support function in this area and can also be easily installed.
  • the camera main body 4 is arranged on the circuit board 44 so that there is no opening. Otherwise, the design of the sensor unit corresponds to the previously mentioned embodiment.
  • a common conductor strip 46 extends, for example, from the central sensor unit 1 and accordingly leads (not shown) through the chamber 18 of the base area 16 , the cylindrical connection area 27 and the receiving area 37 .
  • the method according to the invention provides for the oral sensor unit to be used both before and after tooth cleaning.
  • the oral biofilm is wetted with fluorescein (or a comparable dye) in the entire oral cavity.
  • this can be done entirely manually by first rinsing the teeth with a liquid containing fluorescein or another transport medium for the dye (toothpaste, mouthwash, etc.).
  • a solution for coloring the biofilm can also be introduced into the oral cavity in a last step for a measurement after cleaning and excess liquid drained off.
  • the device according to the invention is then guided over the teeth either manually or fully automatically. At least 3 images (inside, occlusal surface, outside) are preferably recorded for each tooth. The amount and localization of biofilm (and other oral features) per tooth is then determined in the subsequent image analysis.
  • the device or the device itself can additionally have biometric security functions. For example, provision can be made for face recognition via an installed camera or fingerprint recognition via a fingerprint sensor is carried out. In addition, it can be provided that the odontogram is recorded via corresponding optical or mechanical pressure sensors.
  • Mechanical pressure sensors are, for example, a sensor field which is arranged in a mouthpiece in such a way that it points towards the tooth crowns when in use.
  • the resolution and thus the number of sensors in the sensor field is selected in such a way that the bite situation can be recorded very precisely. Since the shape of the tooth is individual and unique, biometric recording can be carried out reliably by recording the tooth areas acting on the sensor surface.
  • the device can only be released and used by the intended user or, in the case of several users (possibly with different mouthpieces), the respective data is only determined, forwarded and stored for the recognized user.
  • a standardized image of the dentition can be generated, which has a schematic image.
  • This information can then be made available to the user in a wide variety of ways.
  • the method according to the invention provides in particular for carrying out an image analysis comprising at least the following steps:
  • biofilm smoldering analysis is used to distinguish areas covered with biofilm from uncovered tooth areas.
  • a trained pattern recognition is preferably used here.
  • recorded images are analyzed manually by manually marking the area of the image that is to be assigned to the tooth.
  • the self-learning system which preferably includes a neural network, for learning, together with other information, such as the camera position and/or tooth position.
  • the system is able to mark new images of teeth independently in such a way that the tooth areas can be distinguished from non-tooth areas.
  • the advantage of the invention is that a method and device are created with which biofilm in the oral cavity can be detected in a simple and comprehensible manner and thus provides data that enables targeted cleaning by appropriate cleaning devices.
  • image files and/or coordinate files are generated, which can be further processed in a cleaning device for the purpose of positioning and/or controlling the intensity and/or controlling the duration of a cleaning.
  • connection cables 42 spacer and guide elements

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Abstract

L'invention concerne un appareil servant à la détection optique du biofilm dans la cavité buccale, lequel appareil comprend au moins un ensemble capteur, ledit ensemble capteur comprenant une caméra dont la zone de détection optique est tournée vers un espace de réception dudit appareil, qui est destiné à recevoir des surfaces à détecter.
EP22843712.5A 2022-01-28 2022-12-21 Appareil et procédé de détection du biofilm dans la cavité buccale Pending EP4468941A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022102045.2A DE102022102045B4 (de) 2022-01-28 2022-01-28 Vorrichtung und Verfahren zur Erfassung von Biofilm im Mundraum
PCT/EP2022/087350 WO2023143839A1 (fr) 2022-01-28 2022-12-21 Appareil et procédé de détection du biofilm dans la cavité buccale

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EP4468941A1 true EP4468941A1 (fr) 2024-12-04

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US (1) US20250120591A1 (fr)
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DE102022115397A1 (de) 2022-06-21 2023-12-21 epitome GmbH Verfahren und System zum Anpassen von Betriebsparametern in einer Mundraumvorrichtung und Verfahren und System zum Übertragen von Mundanwendungsinformationen an eine Mundraumvorrichtung
DE102022115398A1 (de) 2022-06-21 2023-12-21 epitome GmbH Verfahren zum Bestimmen von Zahncharakteristika aus einem Zahnbild
DE102022115396A1 (de) 2022-06-21 2023-12-21 epitome GmbH Verfahren zum Reinigen von Zähnen und Reinigungssystem

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JP2001275964A (ja) * 2000-03-29 2001-10-09 Matsushita Electric Ind Co Ltd ビデオスコープ
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EP3410919B1 (fr) 2016-02-01 2023-12-06 Martin, Marco Dispositif d'imagerie dentaire et procédé d'enregistrement d'impressions photographiques
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DE102022102045A1 (de) 2023-08-03
US20250120591A1 (en) 2025-04-17
WO2023143839A1 (fr) 2023-08-03

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