WO2024046800A1 - Dispositif de balayage intra-buccal avec mise en oeuvre hygiénique de del - Google Patents

Dispositif de balayage intra-buccal avec mise en oeuvre hygiénique de del Download PDF

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Publication number
WO2024046800A1
WO2024046800A1 PCT/EP2023/072936 EP2023072936W WO2024046800A1 WO 2024046800 A1 WO2024046800 A1 WO 2024046800A1 EP 2023072936 W EP2023072936 W EP 2023072936W WO 2024046800 A1 WO2024046800 A1 WO 2024046800A1
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WO
WIPO (PCT)
Prior art keywords
scanning device
leds
housing
intraoral scanning
light
Prior art date
Application number
PCT/EP2023/072936
Other languages
English (en)
Inventor
Anders Larsen
Alexander Bruun Christiansen
Kasper Krogh HANSEN
Original Assignee
3Shape A/S
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 3Shape A/S filed Critical 3Shape A/S
Publication of WO2024046800A1 publication Critical patent/WO2024046800A1/fr

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Classifications

    • 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
    • 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
    • A61B1/00002—Operational features of endoscopes
    • A61B1/00039—Operational features of endoscopes provided with input arrangements for the user
    • 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
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00066—Proximal part of endoscope body, e.g. handles
    • 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
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam

Definitions

  • the disclosure relates to a hygienic implementation of status LEDs in an intraoral scanning device.
  • Cavities and grooves in the surface of medical devices will further complicate the process of cleaning the devices, and therefore leads to a further risk of spreading the bacteria to other patients.
  • Such grooves are usually present in the housing or casing of medical devices, particularly at portions, where different parts of the housing or casing meet.
  • An aspect of the present disclosure is to improve hygiene of intraoral scan devices and to reduce the risk of contamination of a surface of the housing of intraoral scan devices.
  • an intraoral scanning device may include a processing unit configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data; a wireless interface configured to transmit the 2D image data and/or the 3D image data; a battery configured to power at least the processing unit and the wireless interface, and a housing configured to accommodate at least the processing unit, the wireless interface and at least partially the battery.
  • the intraoral scanning device may further include a plurality of LEDs accommodated by the housing.
  • the plurality of LEDs may be configured to emit light through a transparent part of the housing made of a material that is configured emit the light that passes through the material.
  • the emitted light may indicate a status of the battery and/or the wireless interface, and/or indicate a mode of the intraoral scanning device.
  • Allowing the emitted light to penetrate a transparent part of the housing results in an implementation where the plurality of LEDs is not arranged on the housing or in a groove of the housing, resulting in a smooth outer surface of the housing which is easy to clean. If the plurality of LEDs was arranged on the housing, then dirt will be gathered at the surfaces of each of the plurality of LEDs or at surfaces of a structure that comprises the plurality of LEDs. Corners will be created by placing the plurality of LEDs on the housing which will be difficult to clean. In the other situation where the housing includes one or more grooves for the plurality of LEDS, the dirt will go into the one or more grooves, and unfortunately, most of the time will be caught between the housing and each of the plurality of LEDs in the one or more grooves.
  • the material of the transparent part may be configured to diffuse the emitted light that passes through the material.
  • the diffusion provides a more aesthetic look and a visual effect that makes it more comfortable to look at. If no diffusion of the emitted light occurs, then a light pattern of a one or more of the plurality of LEDs may disturb the eyes of a user of the intraoral scanning device or the patient being scanned.
  • the diffusion of the emitted light from the plurality of LEDs happens inside the plastic shell of the transparent part, wherein the light is being scattered until eventually reaching the transparent coating.
  • the diffusion of the emitted light will appear as a homogeneous light pattern.
  • the plurality of LEDs is arranged to have a certain distance between each of the LEDs and with a certain distance between each of the LEDS and the inner surface of the housing so that an optimal diffusion of the emitted light will appear.
  • An optimal diffusion would have no hot spots where a light patten from a single LED is seen.
  • the transparent part of the housing may be made of at least a single layered coating structure, and at least another part of the housing may be made of a multiple layered coating structure, and wherein an outer layer of the multiple layered coating and the single layered coating structure comprise the same material.
  • the outer layer of the multiple layered coating corresponds to the outer layer of the housing.
  • the single layered coating structure corresponds to the outer layer of the housing. During a coating process of the housing the single layered coating structure and the outer layer of the multiple layered coating structure are coated onto the housing in a single coating process.
  • the housing may comprise a plastic shell which the coatings are coated onto.
  • the housing may comprise a plastic shell which is then coated with the multi layered coating structure and the single layered coating structure.
  • the shell may be made of opal white Polycarbonate, which is then coated with the single layered coating structure and the multiple layered coating structure.
  • the multiple layered coating structure includes following layers:
  • the single layered coating structure may include a transparent coating.
  • the transparent coating of both the single layered coating structure and the multiple layered coating structure may be the same.
  • the transparent coating of both the single layered coating structure and the multiple layered coating structure may be coated on at the same time and in a single coating process.
  • the first layer may include at least white and/or silver particles for scattering light that penetrates the plastic shell away from the second layer.
  • the outer surface of the transparent part may be about aligned with an outer surface of the at least another part of the housing.
  • the plurality of LEDs may be arranged circumferentially to the housing. In other words, the plurality of LEDs is arranged circumferentially relative to an inner surface of the housing or the plastic shell of the housing.
  • the plurality of LEDs may be arranged on a ring structure that is connected to an inner module that comprises electronics and/or optics of the intraoral scanning device.
  • the ring structure may go around the inner module and follow the inner surface of the housing.
  • the plurality of LEDs may be arranged such that each LED has approximately the same distance to the inner surface of the housing.
  • the ring structure may be a printed circuit board.
  • the ring structure may comprise a groove in which the plurality of LEDs may be arranged.
  • the side walls of the groove may include a light blocker configured to block the emitted light from the plurality of LEDs to emerge sideways. Thereby, the emitted light is focused upwards and towards the outer surface of the housing, i.e., the transparent coating layer.
  • Each of the plurality of LEDs may have a lighting axis that penetrate the inner surface of the housing with an angle.
  • the angle between the inner surface and the lighting axis may be between 45 degrees and 90 degrees.
  • the plurality of LED includes at least three different colour spectra, such as white, blue or green.
  • the colours can be any colours suitable for the purpose of the plurality of LEDs.
  • the processing unit may be configured to generate at least one control signal to control power delivered to one or more of the plurality of LEDs.
  • the processing unit may include one or more processors, wherein the one or more processors are configured to process the intraoral scan data and to control the plurality of LEDs.
  • the processing unit may be further configured to change at least one control signal over time so that the plurality of LEDs emits at least one static or dynamic lighting effect.
  • the processing unit may be configured to receive at least one control signal from the wireless interface, and wherein the at least one control signal includes information about the status of the wireless interface.
  • the status of the wireless interface may be one or more of the following:
  • the plurality of LEDS provides a rotational dynamic lighting effect with a single colour of spectra. For example, each of the plurality of LEDs blinks such that a rotational appearance of the emitted light is visualized.
  • the single colour may be blue, green or white.
  • the plurality of LEDs emits lights such that the appearance of the emitted light from the plurality of LEDs seems solid or constant.
  • the status may be the “failed to connect” the plurality of LEDs blinks such that a static appearance of the emitted light is visualized. The blinking of the LEDs may appear at least three times.
  • a vibrator may be arranged within the intraoral scanner, and the vibrator may be initiated along with the blinking of the LEDs when the status is the “failed to connect”.
  • the processing unit may receive the at least one control signal from a power management unit of the intraoral scanning device, and the at least one control signal includes information about the status of the battery.
  • the status of the battery may be a low battery power status indicating that the battery should be recharged or exchanges with a new battery.
  • the status may be the “failed to connect”
  • the plurality of LEDs blinks such that a static appearance of the emitted light is visualized.
  • the blinking of the LEDs may appear at least three times.
  • the blinking in this example may be of a different colour than in the example where the status is the “failed to connect”.
  • a vibrator may be arranged within the intraoral scanner, and the vibrator may be initiated along with the blinking of the LEDs when the status is the “failed to connect”.
  • the processing unit may be configured to receive the at least one control signal from the processing unit and/or a power management unit of the intraoral scanning device, and the at least one control signal includes information about the mode of the intraoral scanning device.
  • the mode of the intraoral scanning device may be one or more of the following:
  • the plurality of LEDS may be arranged in the vicinity of a tip cover of the intraoral scanner device.
  • the tip cover is configured to be detachable mounted onto the intraoral scanning device for protecting a scanner tip of the intraoral scanning device.
  • the scanner tip is configured to guide the light being transmitted from a projector unit onto a dental object. When the tip cover is mounted onto the scanner tip, the emitted light may pass through a window that is made of glass.
  • the plurality of LEDs may be arranged between the scanner tip and a button interface of the intraoral scanning device. In any of the arrangements of the plurality of LEDs, a clear and undisturbed view of the plurality of LEDs is achieved during the use of the intraoral scanning device.
  • an intraoral scanning device may be configured to acquire intraoral scan data from a three-dimensional dental object during a scanning session.
  • the intraoral scanning device may include a processing unit that may be configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a memory.
  • the intraoral scanning device may further include a wireless interface that may be configured to transmit 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a plurality of LEDs.
  • the intraoral scanning device may further include a battery configured to power at least the processing unit, the wireless interface, and the plurality of LEDs.
  • the intraoral scanning device may further include a housing that may be configured to enclose the processing unit, the memory, the wireless interface, the plurality of LEDs, and at least partly enclosing the battery.
  • the housing may be made of a material that is configured to diffuse LED light passing through the material.
  • a part of the housing may include a coating that is configured to block the propagation of LED light.
  • an intraoral scanning device may be configured to acquire intraoral scan data from a three-dimensional dental object during a scanning session.
  • the intraoral scanning device may include a processing unit that may be configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a memory.
  • the intraoral scanning device may further include a wireless interface that may be configured to transmit 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a plurality of LEDs.
  • the intraoral scanning device may further include a battery configured to power at least the processing unit, the wireless interface, and the plurality of LEDs.
  • the intraoral scanning device may further include a housing that may be configured to enclose the processing unit, the memory, the wireless interface, the plurality of LEDs, and at least partly enclosing the battery.
  • the housing may be made of a material that is configured to scatter LED light passing through the material.
  • a part of the housing may include a coating that is configured to block the propagation of LED light.
  • an intraoral scanning device may be configured to acquire intraoral scan data from a three-dimensional dental object during a scanning session.
  • the intraoral scanning device may include a processing unit that may be configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a memory.
  • the intraoral scanning device may further include a wireless interface that may be configured to transmit 2D image data and/or 3D image data.
  • the intraoral scanning device may further include a plurality of LEDs.
  • the intraoral scanning device may further include a battery configured to power at least the processing unit, the wireless interface, and the plurality of LEDs.
  • the intraoral scanning device may further include a housing that may be configured to enclose the processing unit, the memory, the wireless interface, the plurality of LEDs, and at least partly enclosing the battery.
  • the housing may be made of a material that is configured to distribute LED light passing through the material evenly.
  • a part of the housing may include a coating that is configured to block the propagation of LED light.
  • the coating may be a painting that is configured to prevent LED light from passing through the painting.
  • the plurality of LEDs may further be enclosed by the part of the housing not including the coating or painting.
  • the plurality of LEDs may further be arranged below the part of the housing not including the coating or painting.
  • the plurality of LEDs may further be configured to emit light in different colours and wavelengths, and may further be configured to blink in different patterns, for example by reducing, enhancing, and completely cutting off the power supply to some or all of them.
  • the plurality of LEDs may be configured to emit light in a colour and/or wavelength and/or pattern in response to a received control signal.
  • the control signal may be generated based on a status or mode of the intraoral scanning device or based on a user input, as will be described further below in this summary section.
  • the housing may be manufactured by injection moulding of a hollow shell in a polycarbonate material.
  • the polycarbonate material may be configured to diffuse light passing through the material.
  • the polycarbonate may be a white polycarbonate.
  • the transparent part of the housing may be created by covering a part of an outer surface of the housing and applying a coating on another part of the outer surface of the housing.
  • the coating may be a painting that is configured to prevent light to pass through the painting, such as a mix of white and silver painting. Covering a part of the housing may result in that particular part not being covered by the coating, and thereby may allow light to pass through that particular part of the housing, and that particular part may thus stay transparent.
  • the housing may further be coated by a second coating, that may be applied on top of the outer surface of the housing on the transparent part of the housing and on the another part of the housing.
  • the second coating may be configured to level out the surface of the housing and fill in the space that may be present as a result of difference in hight between the transparent part of the housing and the another part of the housing.
  • Levelling out the difference in hights on the outer surface of the housing may lead to a more smooth surface and may lead to reducing edges and/or grooves, and may therefore reduce the risk of gathering of bacteria at such edges and/or grooves, and may thus result in a more hygienic housing.
  • the intraoral scanning device may further comprise a user interface that may be adapted to receive a user input to control operation of the processing unit so as to facilitate a change in the colour that is a combination of the at least three different colour spectra.
  • the user interface may be a part of a user interface that is configured to control scanning operations of the intraoral scanning device or may be a separate user interface that may be dedicated to receive the user input to control operation of the processing unit so as to facilitate a change in the colour, such as for example a touch panel in the vicinity of the transparent area.
  • FIG. 1 illustrates an intraoral scanning device comprising a housing accommodating a plurality of LEDs
  • FIG. 2 illustrates the intraoral scanning device comprising a transparent part of the housing covering the plurality of LEDs
  • FIG. 3 schematically shows a cross-sectional view of the housing and schematically illustrating the scattering of the LED light inside a side wall of the housing;
  • FIGS. 4 A and 4B schematically illustrate the plurality of LEDs circumferentially distributed along an inner surface of the housing
  • FIG 5 illustrates an intraoral scanning device comprising a housing accommodating a plurality of LEDs
  • FIG. 6 illustrates a light guiding path in the housing
  • FIG. 7 illustrates the intraoral scanning device comprising a power management unit according to an aspect
  • FIG. 8 schematically shows a cross-sectional view of the housing and schematically illustrates the scattering of the LED light inside a side wall of the housing according to an aspect
  • FIG. 9 shows a table with an overview of control signals from the wireless interface and the power management unit and examples of resulting visual effects performed by the plurality of LEDs.
  • the electronic hardware may include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • Computer program shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • a scanning for providing extra-oral scan data and/or intra-oral scan data may be performed by a dental scanning system that may include an intraoral scanning device such as the TRIOS series scanners from 3 Shape A/S or a laboratory-based scanner such as the E-series scanners from 3 Shape A/S.
  • the dental scanning system may include a wireless capability as provided by a wireless network unit.
  • the scanning device may employ a scanning principle such as triangulation-based scanning, confocal scanning, focus scanning, ultrasound scanning, x-ray scanning, stereo vision, structure from motion, optical coherent tomography OCT, or any other scanning principle.
  • the scanning device is capable of obtaining surface information by operated by projecting a pattern and translating a focus plane along an optical axis of the scanning device and capturing a plurality of 2D images at different focus plane positions such that each series of captured 2D images corresponding to each focus plane forms a stack of 2D images.
  • the acquired 2D images are also referred to herein as raw 2D images, wherein raw in this context means that the images have not been subject to image processing.
  • the focus plane position is preferably shifted along the optical axis of the scanning system, such that 2D images captured at a number of focus plane positions along the optical axis form said stack of 2D images (also referred to herein as a sub-scan) for a given view of the object, i.e., for a given arrangement of the scanning system relative to the object.
  • a new stack of 2D images for that view may be captured.
  • the focus plane position may be varied by means of at least one focus element, e.g., a moving focus lens.
  • the scanning device is generally moved and angled relative to the dentition during a scanning session, such that at least some sets of sub-scans overlap at least partially, in order to enable reconstruction of the digital dental 3D model by stitching overlapping subscans together in real-time and display the progress of the virtual 3D model on a display as feedback to the user.
  • the result of stitching is the digital 3D representation of a surface larger than that which can be captured by a single sub-scan, i.e., which is larger than the field of view of the 3D scanning device.
  • Stitching also known as registration and fusion, works by identifying overlapping regions of 3D surface in various sub-scans and transforming sub-scans to a common coordinate system such that the overlapping regions match, finally yielding the digital 3D model.
  • An Iterative Closest Point (ICP) algorithm may be used for this purpose.
  • Another example of a scanning device is a triangulation scanner, where a time varying pattern is projected onto the dental object and a sequence of images of the different pattern configurations are acquired by one or more cameras located at an angle relative to the projector unit.
  • Colour texture of the dental object may be acquired by illuminating the object using different monochromatic colours such as individual red, green and blue colours or my illuminating the object using multichromatic light such as white light.
  • a 2D image may be acquired during a flash of white light.
  • the process of obtaining surface information in real time of a dental object to be scanned requires the scanning device to illuminate the surface and acquire high number of 2D images.
  • a high-speed camera is used with a framerate of 300-2000 2D frames pr second dependent on the technology and 2D image resolution.
  • the high amount of image data needed to be handled by the scanning device to eighter directly forward the raw image data stream to an external processing device or performing some image processing before transmitting the data to an external device or display. This process requires that multiple electronic components inside the scanner is operating with a high workload thus requiring a high demand of current.
  • the scanning device comprises one or more light projectors configured to generate an illumination pattern to be projected on a three-dimensional dental object during a scanning session.
  • the light projector(s) preferably comprises a light source, a mask having a spatial pattern, and one or more lenses such as collimation lenses or projection lenses.
  • the light source may be configured to generate light of a single wavelength or a combination of wavelengths (mono- or polychromatic). The combination of wavelengths may be produced by using a light source configured to produce light (such as white light) comprising different wavelengths.
  • the light projector(s) may comprise multiple light sources such as LEDs individually producing light of different wavelengths (such as red, green, and blue) that may be combined to form light comprising the different wavelengths.
  • the light produced by the light source may be defined by a wavelength defining a specific colour, or a range of different wavelengths defining a combination of colours such as white light.
  • the scanning device comprises a light source configured for exciting fluorescent material of the teeth to obtain fluorescence data from the dental object.
  • a light source may be configured to produce a narrow range of wavelengths.
  • the light from the light source is infrared (IR) light, which is capable of penetrating dental tissue.
  • the light projector(s) may be DLP projectors using a micro mirror array for generating a time varying pattern, or a diffractive optical element (DOF), or back-lit mask projectors, wherein the light source is placed behind a mask having a spatial pattern, whereby the light projected on the surface of the dental object is patterned.
  • the back-lit mask projector may comprise a collimation lens for collimating the light from the light source, said collimation lens being placed between the light source and the mask.
  • the mask may have a checkerboard pattern, such that the generated illumination pattern is a checkerboard pattern. Alternatively, the mask may feature other patterns such as lines or dots, etc.
  • the scanning device preferably further comprises optical components for directing the light from the light source to the surface of the dental object.
  • the specific arrangement of the optical components depends on whether the scanning device is a focus scanning apparatus, a scanning device using triangulation, or any other type of scanning device.
  • a focus scanning apparatus is further described in EP 2 442 720 Bl by the same applicant, which is incorporated herein in its entirety.
  • the light reflected from the dental object in response to the illumination of the dental object is directed, using optical components of the scanning device, towards the image sensor(s).
  • the image sensor(s) are configured to generate a plurality of images based on the incoming light received from the illuminated dental object.
  • the image sensor may be a high-speed image sensor such as an image sensor configured for acquiring images with exposures of less than 1/1000 second or frame rates in excess of 250 frames pr. Second (fps).
  • the image sensor may be a rolling shutter (CCD) or global shutter sensor (CMOS).
  • the image sensor(s) may be a monochrome sensor including a colour filter array such as a Bayer filter and/or additional filters that may be configured to substantially remove one or more colour components from the reflected light and retain only the other non-removed components prior to conversion of the reflected light into an electrical signal.
  • additional filters may be used to remove a certain part of a white light spectrum, such as a blue component, and retain only red and green components from a signal generated in response to exciting fluorescent material of the teeth.
  • the network unit may be configured to connect the dental scanning system to a network comprising a plurality of network elements including at least one network element configured to receive the processed data.
  • the network unit may include a wireless network unit or a wired network unit.
  • the wireless network unit is configured to wirelessly connect the dental scanning system to the network comprising the plurality of network elements including the at least one network element configured to receive the processed data.
  • the wired network unit is configured to establish a wired connection between the dental scanning system and the network comprising the plurality of network elements including the at least one network element configured to receive the processed data.
  • the dental scanning system preferably further comprises a processor configured to generate scan data (such as extra-oral scan data and/or intra-oral scan data) by processing the two-dimensional (2D) images acquired by the scanning device.
  • the processor may be part of the scanning device.
  • the processor may comprise a Field- programmable gate array (FPGA) and/or an Advanced RISC Machines (ARM) processor located on the scanning device.
  • the scan data comprises information relating to the three- dimensional dental object.
  • the scan data may comprise any of 2D images, 3D point clouds, depth data, texture data, intensity data, colour data, and/or combinations thereof.
  • the scan data may comprise one or more-point clouds, wherein each point cloud comprises a set of 3D points describing the three-dimensional dental object.
  • the scan data may comprise images, each image comprising image data e.g., described by image coordinates and a timestamp (x, y, t), wherein depth information can be inferred from the timestamp.
  • the image sensor(s) of the scanning device may acquire a plurality of raw 2D images of the dental object in response to illuminating said object using the one or more light projectors.
  • the plurality of raw 2D images may also be referred to herein as a stack of 2D images.
  • the 2D images may subsequently be provided as input to the processor, which processes the 2D images to generate scan data.
  • the processing of the 2D images may comprise the step of determining which part of each of the 2D images are in focus in order to deduce/generate depth information from the images.
  • the depth information may be used to generate 3D point clouds comprising a set of 3D points in space, e.g., described by cartesian coordinates (x, y, z).
  • the 3D point clouds may be generated by the processor or by another processing unit.
  • Each 2D/3D point may furthermore comprise a timestamp that indicates when the 2D/3D point was recorded, i.e., from which image in the stack of 2D images the point originates.
  • the timestamp is correlated with the z-coordinate of the 3D points, i.e., the z-coordinate may be inferred from the timestamp.
  • the output of the processor is the scan data, and the scan data may comprise image data and/or depth data, e.g., described by image coordinates and a timestamp (x, y, t) or alternatively described as (x, y, z).
  • the scanning device may be configured to transmit other types of data in addition to the scan data. Examples of data include 3D information, texture information such as infra-red (IR) images, fluorescence images, reflectance colour images, x-ray images, and/or combinations thereof.
  • IR infra-red
  • FIG.l illustrates an intraoral scanning device 10 for acquiring intraoral scan data from a three-dimensional dental object during a scanning session.
  • the intraoral scanning device comprising 10 a processing unit 2 configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data, a wireless interface 4 configured to transmit the 2D image data and/or the 3D image data; a battery 5 configured to power at least the processing unit 2 and the wireless interface 4, and a housing 1 configured to accommodate at least the processing unit 2, the wireless interface 4 and at least partially the battery 5.
  • the housing 1 further comprises a plurality of LEDs 3 and the plurality of LEDs 3 is configured to emit light through a transparent part 6 of the housing 1 made of a material that is configured to emit the light that passes through the material, and wherein the emitted light indicates a status of the battery 5 and/or the wireless interface 4, and/or indicates a mode of the intraoral scanning device 10.
  • FIG. 1 illustrates an intraoral scanning device 10 according to an aspect of the disclosure, for acquiring intraoral scan data from a three-dimensional dental object during a scanning session.
  • the intraoral scanning device 10 includes a processing unit 2 configured to process intraoral scan data of a patient and provide 2D image data and/or 3D image data, a memory, a wireless interface 4 configured to transmit 2D image data and/or 3D image data, a plurality of LEDs 3, a battery 5 configured to power at least the processing unit 2, the wireless interface 4, and the plurality of LEDs 3.
  • the intraoral scanning device 10 further includes a housing 1 configured to enclose the processing unit 2, the memory, the wireless interface 4, the plurality of LEDs 3, and at least partly enclosing the battery 5.
  • the housing 1 may be made of a material that is configured to diffuse LED light passing through the material, scatter LED light passing through the material, and/or distribute LED light passing through the material evenly.
  • a part 20 of the housing 1 may include a coating 51 (shown in FIG. 8) that is configured to block the propagation of LED light.
  • FIG. 1 further illustrates the intraoral scanning device 10 showing a transparent part 6 of the housing 1 covering the plurality of LEDs 3.
  • FIG. 2 illustrates the intraoral scanning device (10) of FIG. 1 showing the transparent part (6) of the housing covering the plurality of LEDs (3).
  • FIG. 3 illustrates an example of the housing 1 including a plastic shell 60 made of polycarbonate material that is configured to scatter light 31 passing through the material thereby diffusing the emitted light 30 from the plurality of LEDs 3.
  • the transparent part 6 of the housing 1 includes a single layered coating structure 40 that includes a transparent coating provided directly on the polycarbonate material 60.
  • a multiple layered coating structure 50 is applied in another part 20 of the housing 1 .
  • the multiple layered coating structure 50 includes at least a first layer 51 that includes at least white and silver particles, a second layer 52 that includes a coloured layer and a third layer 53 which is the transparent coating similar to the transparent coating 53 provided on the housing 1 at the transparent part 6.
  • the second layer is applied through a colouring process.
  • FIGS. 4 A and 4B schematically illustrates a cross-sectional front view of the housing 1 showing the plurality of LEDs 3 distributed circumferentially along an inner surface of the housing (1) and accommodated therein.
  • the plurality of LEDs is arranged around an inner module 70 that may comprise electronics and/or optical components of the intraoral scanning device.
  • the plurality of LEDs is directly connected to a printed circuit board that is part of the inner module 70, see FIG. 4A.
  • the printed circuit board may be a separate component that is connected to an outer surface of the inner module, see FIG. 4B.
  • FIG. 5 illustrates the intraoral scanning device 10 that includes a sensor light blocker 62 arranged on a first side of the plurality of LEDs 3.
  • the sensor light blocker 62 prevents the emitted light from the plurality of LEDs 3 to be captured by a tip sensor 61.
  • FIG. 6 illustrates an example of the housing 1 that includes a light guiding path 63 arranged in for example the plastic shell of the housing 1.
  • the plurality of LEDs 3 is arranged outside the transparent part 6.
  • the emitted light from the plurality of LEDs 3 is then guided via the light guiding path 63 towards the transparent part 6.
  • the light guiding path 63 is L shaped as the plurality of LEDs is arranged outside the transparent part 6.
  • the light guiding path 63 may be vertically straight as the plurality of LEDs is arranged inside the transparent part 6.
  • the light guiding path 63 would have the advantage of focusing the emitted light outwards and towards the outer surface of the housing 1.
  • FIG. 7 shows the intraoral scanning device 10 further comprising a power management unit 7.
  • the power management unit 7 may be a software, a physical component or a physical component controlled by a software.
  • the power management unit 7 may be configured to control power supply to the wireless interface 4 and to the plurality of LEDs 3.
  • the power management unit 7 may be configured to receive control signals from the processing unit 2 with information about power delivery to the wireless interface 4 and to the plurality of LEDs 3.
  • the power management unit 7 may be configured to send and receive control signals to and from the processing unit 2, the wireless interface 4, the battery 5, and the plurality of LEDs 3.
  • FIG. 8 schematically illustrates a part of a cross-section of the housing 1 that covers one of the plurality of LEDs 3.
  • the one of the plurality of LEDs 3 is shown emitting light (represented by an arrow 30) towards an inner surface of a side wall 11 of the housing 1.
  • the figure further illustrates the scattering (schematically illustrated by lines 31) of the emitted light from the one of the plurality of LEDs 3 inside the side wall 11 of the housing 1.
  • Some of the scattered light 31 is shown leaving an outer surface of the side wall 11 of the housing 1 through a part 20 of the housing 1 that is covered by a coating 51.
  • the coating 51 is shown preventing a part of the scattered light 31 from passing through the coating 51 and that part of the scattered light 31 will therefore not be visible from the outside of the housing 1.
  • the coating 51 may be a painting, such as a mix of white and silver. Some of the scattered light 31 is shown leaving an outer surface of the side wall 11 of the housing 1 through the transparent part 6 of the housing 1. This transparent part 6 of the housing 1 is not covered by the coating 51, and the scattered light 31 will therefore be visible as a diffused and evenly distributed light at the transparent part 6 of the housing 1 from the outside of the housing 1.
  • the figure is further showing a transparent coating 53 covering the coating 51 at the part 20 of the housing 1 that is covered by the coating 51 and covering the surface of the housing 1 at the transparent part 6 of the housing 1.
  • the transparent coating 53 is shown levelling out the difference in hight between the part 20 of the housing that is covered by the coating 51 and the transparent part 6 of the housing 1 such that no edges or grooves are present on the transparent coating 53.
  • a layer of a second coating may be applied on top of the coating 51, as shown at 52 on FIG. 3.
  • FIG. 9 shows a table with an overview of control signals from the wireless interface 4 and the power management unit 7 with information about connection status and scan mode, respectively.
  • the power management unit 7 further provides information about the status of the battery 5.
  • the figure shows that the wireless interface 4 sends a control signal to the processing unit 2 with information about the status of the wireless interface 4.
  • the status of the wireless interface 4 may be one or more of the following:
  • the figure further shows examples of resulting visual effects performed by the plurality of LEDs 3 as indication of a current status.
  • the plurality of LEDs 3 provide a rotational dynamic lighting effect with a single colour of spectra.
  • each of the plurality of LEDs 3 blinks such that a rotational appearance of the emitted light is visualized.
  • the single colour in this example is green, but may be blue, green, white, or any other colour.
  • the plurality of LEDs 3 emit a light such that the appearance of the emitted light from the plurality of LEDs 3 seem solid or constant in a blue colour.
  • the status is the “failed to connect”
  • the plurality of LEDs 3 blink such that a dynamic appearance of the emitted light is visualized in a red colour.
  • FIG. 9 further shows that the power management unit 7 of the intraoral scanning device 10 sends a control signal to the processing unit 2 with information about the mode of the intraoral scanning device 10 and about the status of the battery 5.
  • the mode of the intraoral scanning device 10 may be one or more of the following:
  • the status of the battery 5 may be a “low battery” status indicating that the battery 5 should be recharged or exchanged with a new battery.
  • the figure further shows examples of resulting visual effects performed by the plurality of LEDs 3 as indication of a current mode or battery 5 status.
  • the mode is the “idle” mode
  • the plurality of LEDs 3 provide a dynamic fading lighting effect in the green colour.
  • each of the plurality of LEDs 3 blinks such that a dynamic fading appearance of the emitted light is visualized.
  • the mode is the “sleep” mode
  • the plurality of LEDs 3 provide a dynamic fading lighting effect in the blue colour.
  • the mode is the “start scan” mode
  • the plurality of LEDs 3 provide a constant blue light.
  • the plurality of LEDs 3 when the mode is the “scanning” mode, then the plurality of LEDs 3 provide a rotating and blinking effect in white light. In another example, when the mode is the “registration lost” mode, then the plurality of LEDs 3 provide a blinking lighting effect in the red colour. In another example, when the status is the “low battery” status, then the plurality of LEDs 3 provide a dynamic fading lighting effect in the red colour.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Radiology & Medical Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Epidemiology (AREA)
  • Endoscopes (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Selon un mode de réalisation, l'invention concerne un dispositif de balayage intra-buccal. Le dispositif de balayage intra-buccal peut comprendre une unité de traitement conçue pour traiter des données de balayage intra-buccal d'un patient et fournir des données d'image 2D et/ou des données d'image 3D ; une interface sans fil conçue pour transmettre les données d'image 2D et/ou les données d'image 3D ; une batterie conçue pour alimenter au moins l'unité de traitement et l'interface sans fil, et un boîtier conçu pour recevoir au moins l'unité de traitement, l'interface sans fil et au moins partiellement la batterie. Le dispositif de balayage intra-buccal peut en outre comprendre une pluralité de DEL reçues par le boîtier. La pluralité de DEL peut être conçue pour émettre de la lumière à travers une partie transparente du boîtier constituée d'un matériau qui est conçu pour émettre la lumière qui passe à travers le matériau. La lumière émise peut indiquer un état de la batterie et/ou de l'interface sans fil, et/ou indiquer un mode du dispositif de balayage intra-buccal.
PCT/EP2023/072936 2022-08-29 2023-08-21 Dispositif de balayage intra-buccal avec mise en oeuvre hygiénique de del WO2024046800A1 (fr)

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EP22192586 2022-08-29
EP22192586.0 2022-08-29
EP22195268 2022-09-13
EP22195268.2 2022-09-13

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2442720A1 (fr) 2009-06-17 2012-04-25 3Shape A/S Appareil d'exploration à focalisation
WO2013001462A2 (fr) * 2011-06-28 2013-01-03 Chakka Nagesh Brosse à dents électrique à commande mécanique
US20140272764A1 (en) * 2013-03-14 2014-09-18 Michael L. Miller Spatial 3d sterioscopic intraoral camera system background
US20140313299A1 (en) * 2013-04-18 2014-10-23 DüRR DENTAL AG Dental Camera For Detecting Caries
US20220087519A1 (en) * 2019-02-27 2022-03-24 3Shape A/S Intraoral scanning system using magnetic induction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2442720A1 (fr) 2009-06-17 2012-04-25 3Shape A/S Appareil d'exploration à focalisation
WO2013001462A2 (fr) * 2011-06-28 2013-01-03 Chakka Nagesh Brosse à dents électrique à commande mécanique
US20140272764A1 (en) * 2013-03-14 2014-09-18 Michael L. Miller Spatial 3d sterioscopic intraoral camera system background
US20140313299A1 (en) * 2013-04-18 2014-10-23 DüRR DENTAL AG Dental Camera For Detecting Caries
US20220087519A1 (en) * 2019-02-27 2022-03-24 3Shape A/S Intraoral scanning system using magnetic induction

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