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WO2018055747A1 - Dispositif de diagnostic dentaire à ultrasons et sonde dentaire à ultrasons - Google Patents

Dispositif de diagnostic dentaire à ultrasons et sonde dentaire à ultrasons Download PDF

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Publication number
WO2018055747A1
WO2018055747A1 PCT/JP2016/078160 JP2016078160W WO2018055747A1 WO 2018055747 A1 WO2018055747 A1 WO 2018055747A1 JP 2016078160 W JP2016078160 W JP 2016078160W WO 2018055747 A1 WO2018055747 A1 WO 2018055747A1
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WO
WIPO (PCT)
Prior art keywords
ultrasonic
dental
transducer array
gel
sheet
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.)
Ceased
Application number
PCT/JP2016/078160
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English (en)
Japanese (ja)
Inventor
稔道 石黒
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.)
Honda Electronics Co Ltd
Original Assignee
Honda Electronics 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 Honda Electronics Co Ltd filed Critical Honda Electronics Co Ltd
Priority to JP2016571753A priority Critical patent/JP6119013B1/ja
Priority to PCT/JP2016/078160 priority patent/WO2018055747A1/fr
Publication of WO2018055747A1 publication Critical patent/WO2018055747A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/13—Tomography
    • A61B8/14—Echo-tomography

Definitions

  • the present invention relates to a dental ultrasonic diagnostic apparatus and a dental ultrasonic probe for inspecting a tooth condition using ultrasonic waves.
  • Periodontal disease is examined in addition to dental caries.
  • Periodontal disease is a disease in which the alveolar bone, which is the foundation supporting the teeth, collapses due to the progress of symptoms and the teeth are lost. Therefore, it is a big problem in keeping teeth healthy. For this reason, the examination of periodontal disease is performed in order to appropriately prevent or treat periodontal disease.
  • the periodontal disease is examined by measuring the depth of the periodontal pocket using a needle-like instrument called a periodontal pocket probe in addition to X-ray photography. In the inspection using the periodontal pocket probe, the tip of the probe is inserted between the tooth and the gum to check the state of the periodontal bone. Therefore, there is a merit that it can be easily inspected without radiation exposure, but there is a demerit that accompanies pain and bleeding.
  • Patent Document 1 discloses a method of irradiating a periodontal pocket with ultrasonic waves and measuring the depth of the periodontal pocket based on the reflected wave signal.
  • Patent Document 1 a hand tool provided with a tip for irradiating ultrasonic waves at the tip is used. Then, with the periodontal pocket filled with a diagnostic fluid, ultrasonic waves are irradiated from the chip, and the depth of the periodontal pocket is measured pinpointed. Since this inspection method does not display a tomographic image, the parts that can be measured by one inspection are limited. For this reason, in order to grasp
  • the present invention has been made in view of the above problems, and its purpose is to easily and quickly inspect the state of teeth and gums by visual information from tomographic images without radiation exposure and pain.
  • An object of the present invention is to provide a dental ultrasonic diagnostic apparatus and a dental ultrasonic probe that can be used.
  • the invention according to claim 1 propagates ultrasonic waves to a tooth and / or gum as an inspection object, and based on the obtained reflected wave signal, the ultrasonic tomographic image of the inspection object Is a dental ultrasonic diagnostic apparatus for displaying a transducer array having a plurality of ultrasonic transducers arranged and having an ultrasonic radiation surface on the front surface side, and a second surface located on the first surface and the opposite side thereof.
  • a dental ultrasonic diagnostic apparatus comprising: control means for performing electronic focusing and electronic scanning of the ultrasonic waves so as to be bundled and moved along an arrangement direction of the plurality of ultrasonic transducers The gist.
  • the first surface of the gel-like sheet is joined to the ultrasonic emission surface on the front side of the transducer array, and the ultrasonic emission is performed by the gel-like sheet.
  • the surface is covered.
  • the second surface of the gel-like sheet is placed in close contact with the teeth and / or gums to be inspected.
  • a drive signal is input into the some ultrasonic transducer
  • an ultrasonic tomographic image is acquired by a simple operation such as bringing the ultrasonic radiation surface of the transducer array into close contact with the surface of a tooth or gum via a gel sheet.
  • a simple operation such as bringing the ultrasonic radiation surface of the transducer array into close contact with the surface of a tooth or gum via a gel sheet.
  • the gist of the invention according to claim 2 is that, in claim 1, the dental ultrasonic probe is further formed with a handle that is formed in a bar shape that can be gripped and has the transducer array at the tip. .
  • the dental ultrasonic probe of the present invention is a toothbrush type probe in which a transducer array is provided at the tip of a rod-shaped handle portion, so that operability is improved. it can. Specifically, the operator holds the handle and inserts the tip side with the transducer array into the oral cavity, and makes sure that the ultrasonic radiation surface is in close contact with the surface to be inspected via the gel-like sheet. Can do.
  • a third aspect of the present invention is the invention according to the second aspect, wherein a plurality of the connecting portions between the handle portion and the transducer array in the dental ultrasonic probe are based on a longitudinal direction of the handle portion.
  • the gist of the invention is that an angle adjusting mechanism for adjusting the mounting angle of the transducer array with respect to the handle portion is provided in order to change the arrangement direction of the ultrasonic transducers.
  • the angle adjustment mechanism is provided at the connection portion between the handle portion and the transducer array in the dental ultrasonic probe, and the transducer array for the handle portion is provided by the angle adjustment mechanism.
  • the mounting angle is adjusted.
  • the arrangement direction of the plurality of ultrasonic transducers when the longitudinal direction of the handle portion is used as a reference is changed, so that the ultrasonic radiation surface is securely adhered to the surface of the tooth or gum at a location that is difficult to inspect. It becomes possible.
  • it is possible to reliably obtain an ultrasonic tomographic image suitable for examination such as a longitudinal section and a transverse section of a tooth.
  • a fourth aspect of the present invention provides the dental ultrasonic probe according to any one of the first to third aspects, wherein the dental ultrasonic probe is provided so as to face the transducer array and sandwiches the inspection object via the gel-like sheet.
  • the gist of the present invention is to further include a pinching member that can be used.
  • the ultrasonic radiation surface can be reliably adhered to the surface of the inspection object via the gel-like sheet by sandwiching the inspection object by the holding member and the transducer array.
  • an ultrasonic tomographic image to be examined can be obtained with certainty.
  • the invention according to claim 5 is the gel-like sheet according to claim 1, wherein the dental ultrasonic probe fixes the transducer array and can sandwich the object to be inspected.
  • the gist of the invention is that it further includes a fixed support body that supports in a deformed state.
  • the transducer array is fixed by the fixing support, and the gel sheet is deformed and supported by the mouthpiece type. If a dental ultrasonic probe is configured in this way, the ultrasonic radiation surface can be reliably adhered to the surface of a tooth or gum at an arbitrary position via a gel-like sheet, and an ultrasonic tomographic image is reliably obtained. be able to.
  • a sixth aspect of the present invention is the method according to any one of the first to fifth aspects, wherein the pair of transducer arrays are arranged to face each other so that the inspection object can be sandwiched via the gel-like sheet. Is the gist.
  • ultrasonic tomographic images can be acquired simultaneously from the front side and the back side of the teeth by the pair of transducer arrays arranged opposite to each other. For this reason, the state of teeth can be more accurately inspected by checking these tomographic images.
  • the gist of the invention according to claim 7 is that, in any one of claims 1 to 6, the dimension in the arrangement direction of the ultrasonic transducers in the transducer array is 10 mm or more and 20 mm or less.
  • the size of the transducer array is 20 mm or less, the transducer array can be inserted into the oral cavity and the teeth can be inspected reliably.
  • the size of the transducer array is 10 mm or more, it is possible to ensure a sufficient inspection range in which an ultrasonic tomographic image can be displayed, and to perform a tooth inspection efficiently.
  • the invention according to claim 8 is a dental ultrasonic diagnosis in which an ultrasonic wave is propagated to a tooth and / or gum as an inspection object, and an ultrasonic tomographic image of the inspection object is displayed based on the obtained reflected wave signal.
  • a dental ultrasonic probe for use in an apparatus a transducer array having a plurality of ultrasonic transducers arranged and having an ultrasonic radiation surface on the front surface side, and a first surface and a second surface located on the opposite side
  • a gel-like sheet that is bonded so as to cover the ultrasonic radiation surface of the transducer array, and the second surface is closely attached to the inspection object at the time of inspection.
  • the ultrasonic beam incident on the gel-like sheet from the first surface side is the second surface. Focusing at a position before reaching The dental ultrasound probe, characterized by being configured to move along the array direction of the number of ultrasonic transducers and the gist thereof.
  • the first surface of the gel-like sheet is bonded to the ultrasonic emission surface on the front side of the transducer array, and the ultrasonic emission is performed by the gel-like sheet.
  • the surface is covered.
  • the second surface of the gel sheet is placed in close contact with the inspection object.
  • drive signals are input to the plurality of ultrasonic transducers in the transducer array.
  • the ultrasonic beam incident from the first surface side with respect to the gel-like sheet is focused at a position before reaching the second surface, and moves along the arrangement direction of the plurality of ultrasonic transducers.
  • the ultrasonic beam propagates through the gel sheet and is focused before reaching the tooth surface, and then enters the inside from the tooth surface.
  • the dental ultrasonic probe of the present invention since ultrasonic waves are used, there is no radiation exposure as in X-ray imaging, and there is no pain as in an examination using a periodontal pocket probe.
  • the dental ultrasonic probe of the present invention it is not necessary to move from the treatment room to the photographing room or the like as in the case of X-ray photography, and examination can be performed during the treatment of teeth in the treatment room. . For this reason, based on the test result of the dental ultrasonic diagnostic apparatus using the dental ultrasonic probe, the tooth can be treated quickly and accurately.
  • the lineblock diagram showing the schematic structure of the dental ultrasonic diagnostic equipment of a 1st embodiment.
  • the block diagram which shows the electric constitution of the dental ultrasonic diagnostic apparatus of 1st Embodiment.
  • Explanatory drawing which shows the scan position of an ultrasonic wave.
  • Sectional drawing which shows the ultrasonic tomographic image of a tooth
  • Sectional drawing which shows the ultrasonic tomographic image of a tooth
  • Sectional drawing which shows the ultrasonic tomographic image of a tooth
  • the perspective view which shows the dental ultrasonic probe of 2nd Embodiment.
  • the perspective view which shows the dental ultrasonic probe of 3rd Embodiment.
  • the perspective view which shows the dental ultrasonic probe of 4th Embodiment.
  • FIG. 1 is a configuration diagram showing a schematic configuration of a dental ultrasonic diagnostic apparatus 1 according to the present embodiment
  • FIG. 2 is a block diagram showing an electrical configuration of the dental ultrasonic diagnostic apparatus 1.
  • the dental ultrasonic diagnostic apparatus 1 includes an apparatus main body 2 and a dental ultrasonic probe 3 connected to the apparatus main body 2.
  • the dental ultrasonic diagnostic apparatus 1 uses the dental ultrasonic probe 3 to propagate ultrasonic waves to the inspection object 4 (teeth and / or gums), and based on the obtained reflected wave signal, the ultrasonic waves of the inspection object 4 are transmitted. Display a tomographic image.
  • the dental ultrasonic probe 3 includes a handle portion 5 formed in a grippable rod shape, a transducer array 6 provided at the tip of the handle portion 5, and an ultrasonic radiation surface 7 of the transducer array 6. And a gel-like sheet 8 to be attached.
  • the dental ultrasonic probe 3 is electrically connected to the apparatus main body 2 via a signal cable 9.
  • the transducer array 6 is a linear transducer array in which a plurality of ultrasonic transducers 11 (96 elements in the present embodiment) are linearly arranged. Are scanned linearly.
  • the transducer array 6 has a rectangular box shape and has an ultrasonic radiation surface 7 on the front side.
  • the dimension (length) in the arrangement direction of the ultrasonic transducers 11 is about 16 mm, and the dimension (width) in the direction orthogonal to the arrangement direction is about 5 mm.
  • the gel-like sheet 8 is made of a material that is hydrous and has an acoustic impedance equivalent to that of a human biological tissue, and is a flexible and elastic transparent sheet. That is, the gel-like sheet 8 is a sheet that has high ultrasonic wave propagation efficiency and is used as an acoustic coupler.
  • the gel-like sheet 8 of the present embodiment has a constant thickness of about 5 mm.
  • the gel-like sheet 8 has a first surface 12 and a second surface 13 located on the opposite side, and the first surface 12 is bonded so as to cover the ultrasonic radiation surface 7 of the transducer array 6, and the second surface 13 is arranged in close contact with the inspection object 4 during inspection.
  • the area of the gel sheet 8 is substantially equal to the area of the ultrasonic radiation surface 7 of the transducer array 6, and the entire ultrasonic radiation surface 7 is covered with the gel sheet 8.
  • An acoustic lens 15 is interposed between the ultrasonic radiation surface 7 of the transducer array 6 and the first surface 12 of the gel sheet 8. Further, in the dental ultrasonic probe 3, the second surface 13 of the gel-like sheet 8 exposed to the outside is subjected to processing such as cleaning, disinfection, and sterilization as necessary so that the teeth can be examined cleanly and hygienically. Is given.
  • the apparatus main body 2 of the dental ultrasonic diagnostic apparatus 1 includes a controller 20, a pulse generation circuit 21, a transmission circuit 22, an A / D conversion circuit 23, a reception circuit 24, a signal processing circuit 25, an image.
  • a processing circuit 26, a memory 27, a storage device 28, an input device 29, a display device 30 and the like are provided.
  • the controller 20 as a control means is a computer including a well-known central processing unit (CPU), and executes a control program using the memory 27 to control the entire apparatus centrally. Specifically, the controller 20 performs, for example, control for ultrasonic electronic focusing and scanning, control for displaying an ultrasonic tomographic image, and the like.
  • the pulse generation circuit 21 operates in response to a control signal from the controller 20, and generates and outputs a pulse signal having a predetermined period.
  • the transmission circuit 22 includes a plurality of delay circuits (not shown) corresponding to the number of elements of the ultrasonic transducer 11 in the ultrasonic probe 3, and each ultrasonic vibration is based on the pulse signal output from the pulse generation circuit 21.
  • a drive pulse (drive signal) delayed according to the child 11 is output. The delay time of each drive pulse is set so that the ultrasonic beam So outputted from the ultrasonic probe 3 is focused at a predetermined irradiation point Po.
  • the ultrasonic beam So incident on the gel-like sheet 8 from the first surface 12 side is a position before the second surface 13 (the depth from the second surface 13 is 2 mm from the front, for example).
  • Electronic focusing is performed so as to converge in a range (about 0 to 2 mm).
  • electronic scanning is performed so that the ultrasonic beam So moves along the arrangement direction of the plurality of ultrasonic transducers 11.
  • the focus of the ultrasonic beam So is configured to be set and changed by the input device 29.
  • the A / D conversion circuit 23 takes in each reflected wave signal (echo signal) received by each ultrasonic transducer 11 in the ultrasonic probe 3 and converts it from an analog signal to a digital signal.
  • the reception circuit 24 includes a delay circuit, a phasing addition circuit, and the like (not shown). In the receiving circuit 24, a delay time considering the reception directivity is added to each reflected wave signal (echo signal) received by each ultrasonic transducer 11, and then phased and added. By this addition, the phase difference of the received signal of each ultrasonic transducer 11 is adjusted.
  • the signal processing circuit 25 includes a logarithmic conversion circuit, an envelope detection circuit, etc. (not shown).
  • the logarithmic conversion circuit in the signal processing circuit 25 logarithmically converts the reflected wave signal
  • the envelope detection circuit detects the envelope of the output signal of the logarithmic conversion circuit.
  • the image processing circuit 26 performs luminance modulation processing based on the reflected wave signal output from the signal processing circuit 25 and generates image data of the B-mode ultrasonic tomographic image. Specifically, the image processing circuit 26 generates image data with luminance corresponding to the amplitude (signal intensity) of the reflected wave signal. Based on the image data output from the image processing circuit 26, the ultrasonic tomographic image of the inspection object 4 is displayed on the display device 30 in black and white shades.
  • the input device 29 includes a keyboard 31, a trackball 32, various operation buttons 33, and the like, and is used for inputting requests and instructions from the user.
  • the display device 30 is, for example, a display such as an LCD or a CRT, and is used to display an ultrasonic tomographic image of the inspection object 4 and an input screen for various settings.
  • the storage device 28 is a magnetic disk device, an optical disk device or the like, and stores a control program and various data in a recording medium.
  • the controller 20 transfers programs and data from the storage device 28 to the memory 27 in accordance with instructions from the input device 29, and executes them sequentially.
  • the program executed by the controller 20 may be a program stored in a storage medium such as a memory card, a flexible disk, or an optical disk, or a program downloaded via a communication medium. Use.
  • an operator such as a doctor holds the handle 5 of the dental ultrasonic probe 3 in his / her hand and inserts the transducer array 6 and the gel sheet 8 on the probe tip side into the patient's oral cavity. Then, the second surface 13 of the gel sheet 8 is brought into close contact with the surface of the tooth or gum to be inspected 4. Thereafter, the operator operates the operation button 33 (inspection start button) of the input device 29. At this time, the controller 20 determines the button operation, and starts a process for displaying the ultrasonic tomographic image of the inspection object 4.
  • the controller 20 operates the pulse generation circuit 21 to start transmission / reception of ultrasonic waves by the ultrasonic probe 3.
  • the pulse generation circuit 21 operates in response to a control signal output from the controller 20, and a pulse signal having a predetermined cycle is supplied to the transmission circuit 22.
  • a drive pulse having a delay time corresponding to each ultrasonic transducer 11 is generated based on the pulse signal and supplied to the ultrasonic probe 3.
  • each ultrasonic transducer 11 in the transducer array 6 of the ultrasonic probe 3 vibrates and the ultrasonic beam So is irradiated toward the inspection object 4.
  • the ultrasonic beam So radiated from the ultrasonic radiation surface 7 of the transducer array 6 is incident from the first surface 12 side of the gel-like sheet 8 and reaches the second surface 13. Focus at Po. That is, the ultrasonic beam So is propagated through the gel-like sheet 8 and is focused before the tooth surface is reached, and then enters the tooth.
  • a part of the ultrasonic wave propagating through the examination object 4 is a tissue boundary surface (for example, gingiva and tooth surface, gingiva and alveolar bone, enamel and dentin in teeth, cementum and dentin, dentin and pulp) Reflected by the interface such as a cavity) and received by the ultrasonic probe 3.
  • the reflected wave is converted into an electric signal (reflected wave signal) by each ultrasonic transducer 11 of the ultrasonic probe 3.
  • the reflected wave signal is converted into a digital signal by the A / D conversion circuit 23 and then input to the signal processing circuit 25 through the reception circuit 24.
  • the signal processing circuit 25 performs signal processing such as logarithmic conversion and envelope detection, and the processed reflected wave signal is supplied to the image processing circuit 26.
  • the image processing circuit 26 performs image processing for generating image data of an ultrasonic tomographic image based on the reflected wave signal.
  • the controller 20 temporarily stores each image data generated by the image processing circuit 26 in the memory 27.
  • the controller 20 determines whether or not image data for one frame is stored in the memory 27, and transmits the image data to the display device 30 when the image data for one frame is stored in the memory 27.
  • the ultrasonic tomographic image of the inspection object 4 is displayed on the display device 30 with black and white shading.
  • the operator checks the state of the teeth by checking the ultrasonic tomographic image, and determines, for example, the degree of progression of periodontal disease.
  • the operator operates an operation button 33 (examination end button) provided on the input device 29, and then takes out the transducer array 6 on the distal end side of the ultrasonic probe 3 from the oral cavity of the patient to the outside.
  • the controller 20 determines the button operation, and ends the process for displaying the ultrasonic tomographic image.
  • the present inventors confirmed the states of the teeth 4a and gums 4b as the inspection object 4 using the dental ultrasonic diagnostic apparatus 1.
  • the ultrasonic scan positions P1 to P6 are gradually moved upward from the position of the gum 4b corresponding to the lower teeth 4a to acquire an ultrasonic tomographic image.
  • the ultrasonic tomographic images G1 to G6 corresponding to the scan positions P1 to P6 are shown in FIGS.
  • the gum 4b and the alveolar bone 4c are displayed. Then, in the ultrasonic tomographic image G3 in FIG. 6 at the scan position P3, the root portion of the tooth 4a begins to appear, and in the ultrasonic tomographic image G4 in FIG. 7 at the scan position P4, the root portion of the tooth 4a becomes thicker. Yes.
  • the pulp cavity can also be confirmed at the central portion (black portion) of the tooth 4a in the ultrasonic tomographic image G4. Further, in the ultrasonic tomographic image G5 of FIG.
  • the portion of the alveolar bone 4c is not visible, and the teeth 4a and gums 4b are displayed. Further, in the ultrasonic tomographic image G6 of FIG. 9 at the scan position P6, the gum 4b is almost invisible and the tooth 4a is displayed.
  • the present inventors confirmed an ultrasonic tomographic image G7 (see FIG. 10) showing a longitudinal section of the tooth 4a using the extracted tooth 4a.
  • the extracted tooth 4a is placed on a gel-like sheet (not shown) prepared in advance, and the ultrasound is applied with the tooth 4a sandwiched between the gel-like sheet and the gel-like sheet 8 of the ultrasonic probe 3.
  • a tomographic image was taken.
  • FIG. 11 shows a schematic longitudinal section of the tooth 4a.
  • the structures of the enamel 34, the cementum 35, the dentin 36, the pulp cavity 37, the dental canal 38 (see FIG. 11) and the like in the tooth 4a could be confirmed.
  • the ultrasonic beam So incident on the gel-like sheet 8 from the first surface 12 side is focused at a position before reaching the second surface 13.
  • Electronic focusing is performed.
  • the ultrasonic beam So radiated from the ultrasonic radiation surface 7 of the transducer array 6 propagates through the gel-like sheet 8 and is focused before it reaches the surface of the tooth 4a. It enters the inside from the surface. In this way, since the scattering of the ultrasonic wave on the surface of the tooth 4a is suppressed, the tomographic image G7 inside the tooth 4a can be visualized by the ultrasonic wave, which has been difficult in the past.
  • the dental ultrasonic diagnostic apparatus 1 of the present embodiment a simple operation such as bringing the ultrasonic radiation surface 7 of the transducer array 6 into close contact with the surfaces of the teeth 4a and gums 4b via the gel sheet 8 is performed.
  • the ultrasonic tomographic images G1 to G7 can be acquired.
  • the state of the teeth 4a and gums 4b can be inspected quickly in real time.
  • the states of the teeth 4a, gums 4b, and alveolar bone 4c (heights of the gums 4b and alveolar bone 4c, etc.) can be confirmed by the ultrasonic tomographic images G1 to G6.
  • the depth of the periodontal pocket (depth from the gum 4b to the alveolar bone 4c) can be measured, and the progress of periodontal disease can be easily and reliably inspected. Furthermore, since the tomographic image G7 inside the tooth 4a can be confirmed, in addition to the examination of periodontal disease, the examination of caries can be performed. Furthermore, in the dental ultrasonic diagnostic apparatus 1 of the present embodiment, there is no radiation exposure such as X-ray photography, and there is no pain as in an examination using a periodontal pocket probe. Further, when the dental ultrasonic diagnostic apparatus 1 is used, it is not necessary to move from the treatment room to the photographing room or the like as in the case of X-ray photography, and examination can be performed during treatment in the treatment room. For this reason, based on the test result by the dental ultrasonic diagnostic apparatus 1, the tooth 4a can be treated quickly and accurately.
  • the dental ultrasonic probe 3 of the present embodiment is a toothbrush type probe in which the transducer array 6 is provided at the tip of the rod-shaped handle 5, the operability can be improved. Specifically, the operator holds the handle 5 in his / her hand, inserts the tip side with the transducer array 6 into the oral cavity, and places the ultrasonic radiation surface 7 on the surface of the inspection object 4 via the gel-like sheet 8. It is possible to ensure close contact.
  • the size of the ultrasonic transducers 11 in the arrangement direction of the transducer array 6 is about 16 mm, so the transducer array 6 is inserted into the oral cavity and the teeth 4a and The gum 4b can be inspected reliably.
  • the inspection range in which the ultrasonic tomographic images G1 to G7 can be displayed can be sufficiently ensured by ultrasonic electronic scanning, the inspection of the teeth 4a and gums 4b can be performed efficiently.
  • the ultrasonic beam So is positioned at a position in front of the surface of the tooth 4a. Can be accurately matched, and clear ultrasonic tomographic images G1 to G7 can be obtained.
  • the transducer array 6 constituting the dental ultrasonic probe 3 of the present embodiment is a linear transducer array in which a plurality of ultrasonic transducers 11 are linearly arranged.
  • the component cost can be kept low.
  • the area of the gel-like sheet 8 covering the ultrasonic radiation surface 7 of the transducer array 6 is substantially the same as the area of the ultrasonic radiation surface 7, the size of the gel-like sheet 8 may be larger than necessary. In addition, the component cost can be further reduced.
  • a connecting portion between the handle portion 5 and the transducer array 6 includes a plurality of portions when the longitudinal direction of the handle portion 5 is used as a reference.
  • an angle adjustment mechanism 40 for adjusting the mounting angle of the transducer array 6 with respect to the handle 5 is provided.
  • the angle adjustment mechanism 40 rotates the attachment angle of the transducer array 6 with respect to the handle 5 by 90 °, and the direction of the arrangement direction of the ultrasonic transducers 11 is orthogonal to the direction parallel to the longitudinal direction of the handle 5. It can be changed to.
  • this dental ultrasonic probe 3A by changing the mounting angle of the transducer array 6, an ultrasonic tomographic image suitable for examination of the longitudinal and transverse sections of the teeth 4a can be easily acquired. . Further, by adjusting the mounting angle of the transducer array 6 according to the examination site such as the front teeth and the back teeth, an ultrasonic tomographic image of the test site can be reliably acquired.
  • the configuration of the dental ultrasonic probe 3B is different from that of the first embodiment.
  • the dental ultrasonic probe 3 ⁇ / b> B of the present embodiment includes a clamping member 42 that is provided so as to be branched at the distal end side of the handle 5 and to face the transducer array 6. Yes.
  • the sandwiching member 42 has a shape bent in a substantially L shape, and a gel-like sheet 43 is fixed to the bent end.
  • the inspection object 4 is sandwiched between the transducer array 6 and the sandwiching member 42 via the gel sheets 8 and 42.
  • the gel sheet 43 disposed on the holding member 42 side is formed using a thicker and more flexible material than the gel sheet 8 disposed on the transducer array 6 side.
  • the gel-like sheet 43 on the clamping member 42 side is deformed so that the teeth 4a and gums 4b having different thicknesses can be easily sandwiched.
  • the ultrasonic radiation surface 7 can be reliably brought into close contact with the surface of the inspection object 4 via the gel sheet 8, and an ultrasonic tomographic image of the inspection object 4 is obtained. Can be definitely obtained.
  • the configuration of the dental ultrasonic probe 3C is different from that of the first embodiment.
  • a pair of transducer arrays 6, 6 ⁇ / b> A are arranged to face each other so that the inspection object 4 can be sandwiched via the gel sheet 8.
  • the dental ultrasonic probe 3C according to the present embodiment is provided with a distance adjusting unit capable of adjusting the distance between the pair of transducer arrays 6 and 6A according to the thickness of the inspection object 4.
  • the dental ultrasonic probe 3C includes a clamping member 46 provided so as to branch at the distal end side of the handle portion 5, and one transducer array 6A can move to the clamping member 46.
  • a guide groove 47 is formed in the holding member 46 along the longitudinal direction thereof, and a protrusion 48 fitted to the guide groove 47 is formed at the lower end portion of the transducer array 6A.
  • a through hole 51 having an internal thread 50 formed on the inner surface is formed at the center of the protrusion 48 of the transducer array 6A.
  • a rotation shaft 45 as a space adjustment portion is rotatably supported at a position corresponding to the holding member 46.
  • a male screw portion 53 is formed at the distal end of the rotary shaft 45, and an operation knob 54 is provided at the proximal end portion.
  • a rotating shaft 45 is inserted into a support hole (not shown) formed below the transducer array 6 in the handle 5, and the rotating shaft 45 is disposed along the guide groove 47. Further, the male screw portion 53 on the distal end side of the rotating shaft 45 is screwed into the female screw portion 50 formed on the projection portion 48 of the transducer array 6A.
  • the operation knob 54 at the base end of the rotating shaft 45 protrudes from the support hole of the handle portion 5. When the operation knob 54 is turned, the rotation shaft 45 rotates and the transducer array 6A moves along the guide groove 47, whereby the distance between the pair of transducer arrays 6 and 6A is adjusted.
  • the tomographic images can be acquired simultaneously from the front side and the back side of the tooth 4a by the pair of transducer arrays 6 and 6A arranged opposite to each other.
  • the state of the tooth 4a can be inspected more accurately.
  • the interval between the pair of ultrasonic transducers 6 and 6a can be adjusted by rotating the rotation shaft 45 of the interval adjusting unit, inspections having different thicknesses such as front teeth, back teeth, child teeth and adult teeth
  • the object 4 can be reliably sandwiched between the pair of transducer arrays 6 and 6A.
  • the configuration of the dental ultrasonic probe 3D is different from that of the first embodiment.
  • the dental ultrasonic probe 3D of the present embodiment is a mouthpiece type probe.
  • the ultrasonic probe 3D includes a fixed support body 61 that fixes the pair of transducer arrays 6 and supports the gel-like sheet 60 in a deformed state so as to sandwich the inspection object 4 in a mouthpiece shape.
  • the fixed support 61 is formed with a plurality of fixing holes 62 for fixing the transducer array 6. These fixing holes 62 are formed at intervals corresponding to the tooth width along the tooth arrangement direction.
  • the transducer array 6 is detachably fixed to each fixing hole 62. Then, the pair of transducer arrays 6 are housed and fixed in the respective fixing holes 62 located at positions corresponding to the teeth 4a to be inspected (the front teeth in the present embodiment). The transducer array 6 is arranged in the fixing hole 62 so that the arrangement direction of the plurality of ultrasonic transducers 11 is directed in the vertical direction of the teeth 4a. Furthermore, the gel-like sheet 60 is held on the fixed support 61 in a state of being bent so as to sandwich the inner side surface and the outer side surface of the inspection object 4.
  • an ultrasonic tomographic image can be simultaneously acquired from the front side and the back side of the tooth 4a by the pair of transducer arrays 6 arranged to face each other. For this reason, the state of the tooth 4a can be more accurately inspected by checking these tomographic images.
  • the ultrasonic radiation surface 7 can be brought into close contact with the surfaces of the teeth 4a and gums 4b at arbitrary positions via the gel-like sheet 60, and the state of the teeth 4a can be quickly and quickly. It can be surely inspected.
  • the configuration of the dental ultrasonic probe 3E is different from that of the fifth embodiment.
  • the dental ultrasonic probe 3D of the fifth embodiment is formed in a mouthpiece type capable of sandwiching all the teeth 4a, as shown in FIG. 17, the dental ultrasonic probe 3D of the present embodiment.
  • the ultrasonic probe 3E for use is formed in a mouthpiece type capable of sandwiching the front teeth 4a.
  • the dental ultrasonic probe 3E is provided with a fixed support 73 to which the pair of transducer arrays 71 and 72 are fixed.
  • the gel-like sheets 76 and 77 are joined so that the ultrasonic radiation surfaces 74 and 75 of each vibrator
  • the transducer array 71 arranged on the inner side is matched with the shape of the curved surface (the concave inner surface and the convex outer surface in the dentition) of the inspection object 4.
  • the sound wave emitting surface 74 is curved in a convex shape
  • the ultrasonic wave emitting surface 75 of the transducer array 72 disposed on the outside is curved in a concave shape.
  • the transducer arrays 71 and 72 are arranged such that the arrangement direction of the plurality of ultrasonic transducers 11 is directed in the width direction (dentation direction) of the teeth 4a.
  • an ultrasonic tomographic image can be simultaneously acquired from the front side and the back side of the front teeth 4a by the pair of transducer arrays 71 and 72 arranged to face each other. For this reason, the state of the front teeth 4a can be more accurately inspected by checking these tomographic images.
  • the angle adjustment mechanism 40 is configured to adjust the mounting angle of the transducer array 6 with respect to the handle portion 5, but is not limited thereto.
  • a dental ultrasonic probe is used so that a flexible member is interposed at the connecting portion between the handle 5 and the transducer array 6 and the arrangement direction of the ultrasonic transducers 11 can be finely adjusted by the elasticity of the member. It may be configured.
  • the distance adjustment unit (rotation shaft 45 or the like) for adjusting the distance between the pair of transducer arrays 6 and 6A is provided.
  • a plurality of types of ultrasonic probes having different intervals may be configured by omitting the part.
  • the guide groove 47 and the like are formed in the holding member 46 and the interval adjusting unit is configured using the rotation shaft 45.
  • a pair of transducer arrays If it is the structure which can adjust the space
  • the interval adjusting unit may be configured using a slide mechanism that moves one transducer array 6A, a fixing pin that fixes the position of the transducer array 6A, or the like.
  • the transducer array 6 is arranged so that the arrangement direction of the ultrasonic transducers 11 faces the vertical direction of the teeth 4a, but is orthogonal thereto.
  • the ultrasonic transducers 11 may be arranged so that the arrangement direction of the ultrasonic transducers 11 faces in the width direction (dentation direction) of the teeth 4a to be rotated.
  • the transducer arrays 71 and 72 are arranged so that the arrangement direction of the ultrasonic transducers 11 faces the width direction (dentition direction) of the teeth 4a. However, it may be arranged so that the arrangement direction of the ultrasonic transducers 11 is directed in the vertical direction of the teeth 4a orthogonal thereto.
  • the mouthpiece shape is formed so that the front teeth 4a can be sandwiched. However, other portions such as the back teeth can be partially sandwiched. It may be formed in a possible mouthpiece type.
  • the dental ultrasonic diagnostic apparatus further comprising an interval adjusting unit capable of adjusting an interval between the pair of transducer arrays according to a thickness of the inspection object.
  • the thickness of the gel-like sheet is 3 mm or more and 10 mm or less, and the ultrasonic beam incident from the first surface side is from the second surface.
  • a dental ultrasonic diagnostic apparatus characterized by focusing at a depth of 0.1 mm to 1.0 mm.
  • an acoustic lens is interposed between the ultrasonic radiation surface of the transducer array and the first surface of the gel-like sheet.

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  • Biomedical Technology (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract

L'invention concerne un dispositif de diagnostic dentaire à ultrasons qui permet d'inspecter simplement et rapidement l'état des dents et des gencives à l'aide d'informations visuelles à partir d'une image tomographique sans exposition à un rayonnement ou douleur. Une sonde à ultrasons (3) d'un dispositif de diagnostic dentaire à ultrasons (1) est conçue de manière à comprendre une feuille de type gel (8) et un réseau de transducteurs (6) formé par l'agencement d'une pluralité de transducteurs ultrasonores (11). Une première surface (12) de la feuille de type gel (8) est reliée à la surface d'émission d'ultrasons (7) du réseau de transducteurs (6) de manière à la recouvrir, et une seconde surface (13) de la feuille de type gel (8) est disposée de façon à être en contact étroit avec un objet d'inspection (4) pendant l'inspection. Un dispositif de commande (20) applique un signal d'entraînement à la pluralité de transducteurs ultrasonores (11) du réseau de transducteurs (6) et effectue une focalisation électronique et un balayage électronique des ultrasons de telle sorte qu'un faisceau d'ultrasons (So) qui pénètre dans la feuille de type gel (8) depuis le côté de la première surface (12) est focalisé avant d'atteindre la seconde surface (13) et se déplace le long de la direction de l'agencement de la pluralité de transducteurs ultrasonores (11).
PCT/JP2016/078160 2016-09-26 2016-09-26 Dispositif de diagnostic dentaire à ultrasons et sonde dentaire à ultrasons Ceased WO2018055747A1 (fr)

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JP2016571753A JP6119013B1 (ja) 2016-09-26 2016-09-26 歯科用超音波診断装置及び歯科用超音波プローブ
PCT/JP2016/078160 WO2018055747A1 (fr) 2016-09-26 2016-09-26 Dispositif de diagnostic dentaire à ultrasons et sonde dentaire à ultrasons

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020081068A (ja) * 2018-11-19 2020-06-04 ゼネラル・エレクトリック・カンパニイ 超音波プローブ及び超音波装置
WO2020148406A1 (fr) * 2019-01-16 2020-07-23 Trophy Procédé de détection d'une anomalie le long d'une partie d'une arcade dentaire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201802402D0 (en) * 2018-02-14 2018-03-28 Littlejohn Alexander Apparatus and method for prosthodontics
CN111770729B (zh) 2018-03-02 2024-05-31 狮王株式会社 用于判定口腔内指标的检查方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168844A (ja) * 1983-03-15 1984-09-22 株式会社富士通ゼネラル 超音波検査方法およびその装置
JPS6055937A (ja) * 1983-09-08 1985-04-01 松下電器産業株式会社 超音波検査装置
JP2001507603A (ja) * 1996-12-31 2001-06-12 ダイアグノスティック・ウルトラサウンド・コーポレーション 医療用超音波装置と共に用いる結合パッド
JP2006020828A (ja) * 2004-07-08 2006-01-26 Toshiba Corp 超音波プローブ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168844A (ja) * 1983-03-15 1984-09-22 株式会社富士通ゼネラル 超音波検査方法およびその装置
JPS6055937A (ja) * 1983-09-08 1985-04-01 松下電器産業株式会社 超音波検査装置
JP2001507603A (ja) * 1996-12-31 2001-06-12 ダイアグノスティック・ウルトラサウンド・コーポレーション 医療用超音波装置と共に用いる結合パッド
JP2006020828A (ja) * 2004-07-08 2006-01-26 Toshiba Corp 超音波プローブ

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020081068A (ja) * 2018-11-19 2020-06-04 ゼネラル・エレクトリック・カンパニイ 超音波プローブ及び超音波装置
WO2020148406A1 (fr) * 2019-01-16 2020-07-23 Trophy Procédé de détection d'une anomalie le long d'une partie d'une arcade dentaire
EP3911241A1 (fr) * 2019-01-16 2021-11-24 Trophy Sonde parodontale ultrasonore
JP2022523000A (ja) * 2019-01-16 2022-04-21 トロフィー エスアーエス 超音波歯周プローブ
JP2022524703A (ja) * 2019-01-16 2022-05-10 トロフィー エスアーエス 歯列弓の一部分に沿って異常を検出する方法
JP7516393B2 (ja) 2019-01-16 2024-07-16 トロフィー エスアーエス 超音波歯周プローブ
JP7599264B2 (ja) 2019-01-16 2024-12-13 トロフィー エスアーエス 歯列弓の一部分に沿って異常を検出する方法
JP2025023064A (ja) * 2019-01-16 2025-02-14 トロフィー エスアーエス 歯列弓の一部分に沿って異常を検出する方法

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