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WO2024242363A9 - Dispositif de scanner buccal 3d - Google Patents

Dispositif de scanner buccal 3d Download PDF

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Publication number
WO2024242363A9
WO2024242363A9 PCT/KR2024/005941 KR2024005941W WO2024242363A9 WO 2024242363 A9 WO2024242363 A9 WO 2024242363A9 KR 2024005941 W KR2024005941 W KR 2024005941W WO 2024242363 A9 WO2024242363 A9 WO 2024242363A9
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WO
WIPO (PCT)
Prior art keywords
oral
teeth
unit
image data
tooth
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
PCT/KR2024/005941
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English (en)
Korean (ko)
Other versions
WO2024242363A1 (fr
Inventor
최동재
신영훈
장혁준
김남종
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.)
Bigscan Co Ltd
Original Assignee
Bigscan Co Ltd
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 Bigscan Co Ltd filed Critical Bigscan Co Ltd
Publication of WO2024242363A1 publication Critical patent/WO2024242363A1/fr
Publication of WO2024242363A9 publication Critical patent/WO2024242363A9/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration

Definitions

  • the present invention relates to an oral scanner device, and more particularly, to a 3D oral scanner device that is attached to teeth in the oral cavity in a shape similar to the shape of the entire dental arch and can quickly scan individual teeth and the entire dental arch structure in the oral cavity at once to obtain 3D dental image data for the entire dental arch.
  • Conventional oral scanner devices are hand-held by the operator, inserted into the patient's mouth, and manually scanned by moving along the patient's teeth.
  • the existing oral scanning method requires the operator to hold the scanner in his/her hand and insert it into the patient's mouth to scan the entire dentition for a long time, and the angle and position of the oral scanner must be frequently changed within the patient's mouth, which causes operator fatigue and patient discomfort.
  • Conventional oral scanner devices have difficulty obtaining precise scan data due to errors in the scanned data, distortions due to reflectivity, refractive index, etc. when the patient moves or the scanner is in an inappropriate position.
  • conventional oral scanner devices have the problem that they can only scan an area of one or two teeth at a time, so it takes a lot of time to scan the entire oral structure.
  • Conventional oral scanner devices must acquire images from optical lenses and projectors by passing through a separate optical lens and aligning the focal point on an image sensor to acquire photographed data, which inevitably makes the appearance of the oral scanner larger.
  • it is difficult to move and take photographs in the limited narrow oral structure, and since inaccurate scan information is obtained for each tooth area, errors accumulate, resulting in distortion of scan data when taking photographs of the entire dental structure.
  • Patent Document 0001 Korean Registered Patent No. 10-1418403
  • the purpose of the present invention is to provide a 3D oral scanner device that can be attached to teeth in the oral cavity in a shape similar to the overall shape of the teeth and can quickly scan individual teeth and the entire teeth structure in the oral cavity at once to obtain 3D dental image data for the entire teeth.
  • a 3D oral scanner device is configured to include: a housing body which is attached to teeth in the oral cavity in a shape similar to the overall shape of the teeth, and which is formed of an optical fiber bundle; an oral tray housing which extends from the housing body and forms a connecting portion in the shape of a handle; and an oral scanner-mounted reader which is detachably attached to the connecting portion of the oral tray housing and forms an electrical connecting portion at an end portion, such that when combined with the oral tray housing, the connecting portion and the electrical connecting portion come into contact to transmit and receive power or a control signal.
  • the oral scanner-equipped reader further includes: a light source unit that irradiates a light source of the same wavelength or a light source of different wavelengths to teeth in the oral cavity; an optical lens unit that detects an optical signal which is a reflected light when a measurement light irradiated from the light source unit from the optical fiber bundle is reflected by a tooth structure in the oral cavity of a dental patient, receives the detected optical signal, and disperses the optical signal by color included in the light source unit when the optical signal is focused; an image sensor unit that converts the optical signal formed by color through the optical lens unit into an electrical signal and outputs analog image data; an image conversion processing unit that converts the analog image data output from the image sensor unit into digital image data by color, performs signal processing to convert the digital image data into color image data, and outputs the converted color image data; and a control unit that transmits the color image data output from the image conversion processing unit to a computer device through a communication unit.
  • the image sensor unit may be a CMOS (Complementary Metal Oxide Semiconductor) sensor with a quad phase detection function.
  • CMOS Complementary Metal Oxide Semiconductor
  • the housing body of the oral tray housing and the connecting portion are manufactured into a single shape by inserting the optical fiber bundle into a mold so that the optical fiber bundle is formed of the optical fiber bundle.
  • the image sensor section obtains phase difference information (up/down, left/right) from the optical fiber bundle using the Quad Phase Detection function, calculates optical distance information of each tooth image data based on the obtained phase difference information, obtains color-specific imaging data including the calculated optical distance information, and the calculated optical distance information is used to implement a 3D modeled tooth image of the 3D tooth image data.
  • the present invention has the effect of enabling the acquisition of accurate dental image data without errors or distortions by quickly capturing images of teeth, partial teeth, and the entire dental arch structure at once by simply wearing the oral scanner device in the mouth without having to hold the device in one hand and take pictures for a long time.
  • FIGS. 1 to 3 are drawings showing the configuration of a 3D oral scanner device in the shape of an oral tray according to an embodiment of the present invention.
  • FIG. 4 is a drawing briefly showing the configuration of an oral tray housing according to an embodiment of the present invention.
  • FIG. 5 is a block diagram briefly illustrating the internal configuration of a reader equipped with an oral scanner according to an embodiment of the present invention.
  • Figure 6 is a block diagram briefly showing the internal configuration of a computer device according to an embodiment of the present invention.
  • An intraoral scanner device is an optical device that is inserted into the oral cavity of a dental patient to non-contactly scan the teeth and create a three-dimensional scanning model of the teeth.
  • FIGS. 1 to 3 are drawings showing the configuration of a 3D oral scanner device in the shape of an oral tray according to an embodiment of the present invention
  • FIG. 4 is a drawing briefly showing the configuration of an oral tray housing according to an embodiment of the present invention.
  • a 3D oral scanner device (100) is a device that is placed along the teeth in the oral cavity of a dental patient to obtain three-dimensional information of the structures in the oral cavity and automatically capture the entire teeth structure at once quickly and accurately.
  • a 3D oral scanner device (100) includes an oral tray housing (110) similar to a shape of teeth in the oral cavity, an oral scanner-mounted reader (120) that irradiates a light source to the teeth at an optimized wavelength, and a computer device (130).
  • the oral tray housing (110) is manufactured in the shape of a mouth piece by inserting an optical fiber bundle (140) into a mold and is attached to teeth in the oral cavity in a shape similar to the shape of the entire teeth.
  • the oral tray housing (110) includes a housing body (111) that is inserted into a tooth in the shape of a tooth and in which a channel in the shape of a tooth is formed, and a handle-shaped connecting part (112) that extends from the housing body (111) and is coupled to an oral scanner device reader (120).
  • the oral tray housing (110) is manufactured as a single shape by inserting an optical fiber bundle (140) into a mold so that the housing body (111) and the connecting portion (112) are formed of an optical fiber bundle.
  • the light source unit (121) generates measurement light for scanning the oral structures of a dental patient and irradiates the light onto the teeth.
  • the oral scanner-equipped reader (120) can be attached and detached from the connecting part (112) of the oral tray housing (110).
  • An electrical connection is formed at the end of the oral scanner-equipped reader (120), so that when the oral tray housing (110) and the oral scanner-equipped reader (120) are connected, the connection (112) and the electrical connection come into contact to transmit and receive power or control signals.
  • the optical fiber bundle (140) detects an optical signal, which is a reflected light from a structure in the oral cavity of a dental patient, when the measurement light irradiated from the light source (121) is reflected, and transmits the detected optical signal to the optical lens unit (124).
  • the oral tray housing (110) can be controlled in a manner that, in the case of a dental patient with partial or missing teeth, the reflected light from the optical fiber corresponding to only the part with some teeth is detected by covering the entire dentition.
  • FIG. 5 is a block diagram briefly illustrating the internal configuration of a reader equipped with an oral scanner according to an embodiment of the present invention.
  • An oral scanner-equipped reader (120) includes a light source unit (121), a control unit (122), a power supply unit (123), an optical lens unit (124), an image sensor unit (125), an image conversion processing unit (126), a storage unit (127), and a communication unit (128).
  • the light source (121) may be a light source of the same wavelength (e.g., white light), or may be a light source of the same wavelength or a different wavelength (e.g., blue, green, red, yellow, near-infrared wavelength, etc.), and may be provided by a known LED module.
  • white light e.g., white light
  • a different wavelength e.g., blue, green, red, yellow, near-infrared wavelength, etc.
  • the light source unit (121) irradiates the tooth structure according to the output position and output angle set under the control of the control unit (122).
  • the control unit (122) stores output position information and output angle information for the measurement light controlled by the light source unit (121).
  • the control unit (122) controls the power supply unit (123) to supply power to the light source unit (121), the image sensor unit (125), and the image conversion processing unit (126), and in particular, controls the light source unit (121) to generate measurement light by supplying power.
  • the optical fiber bundle (140) detects the optical signal reflected from the tooth by the light irradiated through the light source unit (121) and transmits the optical signal detected through the optical fiber to the optical lens unit (124).
  • the optical fiber bundle (140) has the characteristic that light incident at an angle greater than the critical angle is totally reflected and transmitted to a long distance with little loss.
  • the optical fiber bundle (140) is implemented with a core portion having a refractive index of n1 and a clad portion having a refractive index of n2, and the refractive indices of the core portion and the clad portion can be appropriately combined to implement chromatic aberration that increases gradually as the optical signal is reflected.
  • the optical lens unit (124) is implemented to focus the light signal guided through the optical fiber bundle (140) by color.
  • the optical lens unit (124) disperses the optical signal by color contained in the light source unit (121) when focusing the optical signal transmitted from the optical fiber bundle (140). Originally, all lenses generate chromatic aberration when focusing, but the optical lens unit (124) of the present invention is implemented so that the image sensor unit (125) can obtain color-specific imaging data by utilizing the chromatic aberration characteristics of the lens.
  • the image sensor unit (125) may be a CCD (Charge-Coupled Device) sensor or a CMOS (Complementary Metal Oxide Semiconductor) sensor having a Quad Phase Detection (hereinafter referred to as 'QPD') function, and preferably, a CMOS sensor having a QPD Quad Phase Detection (QPD) function may be used.
  • the CCD sensor can generate a clear image even under low light conditions, and can be advantageous in distinguishing the colors of teeth since color expression is improved compared to the CMOS sensor. In addition, it has low background noise and is less affected by external noise. However, if a sufficient light source is secured, a CMOS sensor having a QPD function may be used as the image sensor unit (125).
  • An optical filter is installed in front of the image sensor unit (125) as needed to filter light incident on the image sensor unit (125).
  • the optical filter can form a color filter array including a plurality of color filters and a plurality of mixed filters.
  • the control unit (122) controls the operation of the image sensor unit (125) and the light source unit (121).
  • the image sensor unit (125) is implemented as a CCD array or a CMOS (Quad Phase Detection) array, and converts an optical signal formed by color through the optical lens unit (124) into an electrical signal to output analog image data.
  • CMOS Quad Phase Detection
  • the image sensor unit (125) obtains BLUE imaging data or RED imaging data through the optical lens unit (124).
  • the image sensor unit (125) obtains color-specific imaging data through the optical lens unit (124).
  • the image sensor unit (125) obtains phase difference information (up/down, left/right) from the optical fiber bundle (140) using the Quad Phase Detection function, and calculates optical distance information of each tooth image data based on the obtained phase difference information.
  • the image sensor unit (125) acquires color-specific imaging data including calculated optical distance information.
  • the calculated optical distance information is used to implement 3D modeling of the 3D tooth image data.
  • the image conversion processing unit (126) converts analog image data output from the image sensor unit (125) into color-specific digital image data, performs signal processing on the data, converts it into color image data, and outputs it.
  • the image conversion processing unit (126) can be implemented as an image signal processor (ISP).
  • the image conversion processing unit (126) can be implemented to synthesize and process RGB image digital data acquired from the image sensor unit (125) and convert it into data that can be previewed on an LCD display of a PC or mobile phone, and output the converted data in the form of RGB or YUV, etc.
  • the image sensor unit (125) obtains digital image data by color, i.e., RED imaging data, GREEN imaging data, and Blue imaging data.
  • the image conversion processing unit (126) performs image processing on the final acquired digital image data to synthesize RGB data, and stores the acquired RGB or converted YUV image data for each pixel in the storage unit (127).
  • the control unit (122) transmits RGB or converted YUV image data stored in the storage unit (127) to the computer device (130) through the communication unit (128).
  • the control unit (122) can control the light source unit (121) to perform a tooth scan using a composite light source and composite wavelength for a patient without teeth, and light in the range of 700 to 1090 nm (e.g., 850 nm) can be used.
  • the control unit (122) can perform a tooth scan using a generally transparent wavelength so as to control the light source unit (121) to at least partially penetrate and pass through the enamel and dentin of the teeth to obtain a transmission image for a patient without teeth.
  • Figure 6 is a block diagram briefly showing the internal configuration of a computer device according to an embodiment of the present invention.
  • a computer device (130) represents a PC and includes a communication interface unit (131), a processing unit (132), an image data storage unit (133), and a display unit (134).
  • the communication interface unit (131) provides a communication channel that can transmit and receive data with the control unit (122) of the oral scanner-equipped reader (120).
  • the processing unit (132) receives RGB or converted YUV image data acquired for each pixel through the communication interface unit (131), acquires individual images of each tooth using the received color image data, and extracts depth information of the tooth using optical distance information between the tooth surface and the surface of the optical lens unit (124).
  • the processing unit (132) generates multiple 2D tooth image data using individual images of each tooth and depth information of each tooth, and combines the generated multiple 2D tooth image data to align a 3D modeled tooth image of the 3D tooth image data.
  • the processing unit (132) can store a 3D modeled tooth image of 3D tooth image data in the image data storage unit (133) and output it to the display unit (134).
  • the processing unit (132) uses the pre-installed 3D oral scanner software to generate a scan selection signal for the entire range of teeth, individual teeth, or partial teeth in the oral cavity and transmits the signal to the oral scanner-mounted reader (120).
  • control unit (122) of the oral scanner-equipped reader (120) receives a scan selection signal from a computer device (130), it recognizes the range of the entire teeth, individual teeth, or partial teeth from the received scan selection signal and controls the light irradiated from the light source unit (121) by the power supply unit (123).
  • the control unit (122) scans the entire teeth, individual teeth, or partial teeth in the patient's oral cavity through an optical fiber bundle (140), and controls the image sensor unit (125) and image conversion processing unit (126) to generate color tooth image data.
  • the process unit (132) can perform a tooth scan by selecting the shooting range of teeth and dentition in the oral cavity.
  • the process unit (132) can control a series of scanning processes to re-photograph any part of the teeth in the oral cavity.
  • the oral tray housing (110) can fully scan the upper or lower jaw of a dental patient, respectively.
  • the oral tray housing (110) is prepared in two pieces, one for the upper jaw or the lower jaw of the dental patient, and is inserted into the dental patient's teeth.
  • the processing unit (132) selects the shooting range of the entire teeth and performs scanning, generating maxillary oral scan data and mandibular oral scan data.
  • a dental patient inserts the upper jaw oral tray housing and the lower jaw oral tray housing into the teeth and bites them.
  • the process unit (132) selects a shooting range of the entire teeth and performs a scan, thereby generating bite scan data.
  • the processing unit (132) can generate image data of the entire oral cavity of a dental patient by aligning the maxillary oral cavity scan data, the mandibular oral cavity scan data, and the bite scan data so that they overlap each other within the oral cavity of the dental patient.
  • the control unit (122) applies power from the power supply unit (123) to the light source unit (121) to generate measurement light and irradiates the generated measurement light onto the teeth.
  • the optical fiber bundle (140) detects the optical signal reflected from the tooth by the light irradiated through the light source unit (121) and transmits the optical signal detected through the optical fiber to the optical lens unit (124).
  • the optical lens unit (124) is implemented to focus the light signal guided through the optical fiber bundle (140) by color and transmit it to the image sensor unit (125).
  • the image sensor unit (125) obtains BLUE imaging data or RED imaging data including phase difference information through the optical lens unit (124), and generates color-specific imaging data through this.
  • the image conversion processing unit (126) converts analog image data output from the image sensor unit (125) into color-specific digital image data, and converts it into color image data through signal processing.
  • the control unit (122) transmits color image data converted by the image conversion processing unit (126) to a computer device (130) through the communication unit (128).
  • the processing unit (132) of the computer device (130) obtains individual images of each tooth using color image data obtained for each pixel through the communication interface unit (131), extracts depth information of the tooth using optical distance information between the tooth surface and the surface of the optical lens unit (124), generates a plurality of two-dimensional tooth image data using the individual images of each tooth and the depth information of each tooth, and aligns the 3D modeled tooth image of the 3D tooth image data by combining the generated plurality of two-dimensional tooth image data.
  • the process unit (132) outputs a 3D modeled tooth image of the 3D tooth image data to the display unit (134).
  • the processing unit (132) uses the pre-installed 3D oral scanner software to select the shooting range as the entire teeth, individual teeth, or partial teeth in the oral cavity and performs a tooth scan.
  • 3D oral scanner device 110 Oral tray housing 111: Housing body 112 Connection part 120: Oral scanner mounting reader 121: Light source part 122: Control part 123: Power supply part 124: Optical lens part 125: Image sensor part 126: Image conversion processing part 127: Storage part 128: Communication part 130: Computer device 131: Communication interface part 132: Process part 133: Image data storage part 134: Display part 140: Optical fiber bundle

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Abstract

L'invention concerne un dispositif de scanner buccal 3D fixé, sous une forme similaire à celle d'une dentition globale, à des dents dans une cavité buccale de façon à balayer rapidement des dents individuelles dans la cavité buccale et la structure de dentition globale en une seule fois et permet ainsi obtenir des données d'image de dent 3D concernant la dentition globale. Dans la présente invention, lorsque le dispositif de scanner dentaire est simplement porté dans la cavité buccale et n'est pas en train de photographier pendant une longue période tout en étant maintenu dans la main, les dents, les parties des dents et la structure de dentition globale peuvent être rapidement photographiées toutes en une fois de telle sorte que des données d'image de dent précises peuvent être acquises sans erreurs et distorsion.
PCT/KR2024/005941 2023-05-19 2024-05-02 Dispositif de scanner buccal 3d Pending WO2024242363A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020230065278A KR102610312B1 (ko) 2023-05-19 2023-05-19 3ｄ 구강 스캐너 장치
KR10-2023-0065278 2023-05-19

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WO2024242363A1 WO2024242363A1 (fr) 2024-11-28
WO2024242363A9 true WO2024242363A9 (fr) 2024-12-26

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KR102610312B1 (ko) * 2023-05-19 2024-01-08 주식회사 빅스캔 3ｄ 구강 스캐너 장치
KR20250135599A (ko) * 2024-03-06 2025-09-15 아크리얼 주식회사 구강 모델 생성 방법 및 이를 실행하기 위하여 기록매체에 기록된 컴퓨터 프로그램

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US7713058B2 (en) * 2003-07-28 2010-05-11 Atsushi Takahashi Dental mirror, and an intraoral camera system using the same
KR101418403B1 (ko) 2012-12-14 2014-07-09 라파바이오 주식회사 구강용 3차원 스캐너
KR101499649B1 (ko) * 2013-08-20 2015-03-06 조현재 구강촬영용 트레이, 구강촬영용 트레이를 포함하는 구강촬영장치 및 구강촬영 시스템
KR101701921B1 (ko) * 2015-05-22 2017-02-02 주식회사 미루시스템즈 구강 촬영장치
KR102232498B1 (ko) * 2019-02-27 2021-03-29 한국광기술원 구강용 광음향 자극 장치
KR102610312B1 (ko) * 2023-05-19 2024-01-08 주식회사 빅스캔 3ｄ 구강 스캐너 장치

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