WO2002096281A1 - Procede et dispositif d'acquisition et de traitement d'images d'une dent - Google Patents
Procede et dispositif d'acquisition et de traitement d'images d'une dent Download PDFInfo
- Publication number
- WO2002096281A1 WO2002096281A1 PCT/FR2002/001776 FR0201776W WO02096281A1 WO 2002096281 A1 WO2002096281 A1 WO 2002096281A1 FR 0201776 W FR0201776 W FR 0201776W WO 02096281 A1 WO02096281 A1 WO 02096281A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tooth
- images
- wavelength
- fluorescence
- area
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000003595 spectral effect Effects 0.000 claims abstract description 29
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000000295 emission spectrum Methods 0.000 claims abstract description 10
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims description 20
- 238000002073 fluorescence micrograph Methods 0.000 claims description 12
- 230000010365 information processing Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- 239000011707 mineral Substances 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 5
- 108091008695 photoreceptors Proteins 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 238000004020 luminiscence type Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims 1
- 208000002925 dental caries Diseases 0.000 abstract description 13
- 238000001514 detection method Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 230000004298 light response Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 3
- 210000004268 dentin Anatomy 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 238000005115 demineralization Methods 0.000 description 2
- 230000002328 demineralizing effect Effects 0.000 description 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000011477 surgical intervention Methods 0.000 description 2
- 238000001429 visible spectrum Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 208000037273 Pathologic Processes Diseases 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000006694 eating habits Nutrition 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002189 fluorescence spectrum Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
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- 239000007924 injection Substances 0.000 description 1
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- 230000004060 metabolic process Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009054 pathological process Effects 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 208000024891 symptom Diseases 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
Definitions
- the present invention relates to a method and a device for acquiring and processing images of a tooth, for the detection of dental caries.
- a disadvantage of this known technique is that by using a monochromatic lighting light whose wavelength is between 350 and 600 nm approximately, it is not known by which component of the tooth the light response to the illumination of the tooth is produced, which is a factor of uncertainty in the results since, in particular, the light response of the organic part of the tooth varies as a function of a certain number of factors such as the quality of tooth brushing, the patient's eating habits, etc.
- Another drawback of this known technique relates to the measurement on two wavelengths only of the integrated light response of the illuminated area of the tooth, this punctual measurement not providing sufficient information on the state of the examined area of the tooth, this which is another factor of uncertainty about the quality of the results.
- Another disadvantage is that, if the examined area of the tooth is illuminated by monochromatic light whose wavelength is less than about 400 nm and is therefore outside the visible spectrum, the practitioner does not know exactly which area the tooth is lit and is likely to have a cavity. This leads in practice to limit the use of this technique to visible light lighting, which is the cause of imprecise or erroneous results on the measurements, for reasons which will be explained in more detail below.
- the invention particularly relates to a method and a device of the aforementioned type, which do not have the aforementioned drawbacks of the known technique.
- It also relates to a method and a device of this type, which allow reliable and precise detection of dental caries, even at a stage early in their development, and which also allow precise visualization and localization of the examined area of the tooth.
- the invention provides a method of acquiring and processing images of a tooth, consisting in illuminating an area of a tooth in monochromatic light and in capturing the luminescence emitted by the illuminated area of the tooth, characterized in that it also consists of: - to be used to illuminate said zone of the tooth with monochromatic light whose wavelength is chosen to excite a fluorescence emission by the mineral part of the tooth,
- the detection of possible caries is based on the detection of the fluorescence emitted in two wavelength bands by the mineral component of a tooth, which is formed of hydroxylapatite single crystals.
- Dental caries is a progressive and localized demineralization of the hard tissues of the tooth surface, caused by the acids produced by bacteria and resulting in a reduction in size of the hydroxylapatite crystals and in a modification of the photo-physical properties of the dental surface.
- the mineral component of the tooth In response to light excitation at an appropriate wavelength, the mineral component of the tooth emits fluorescence which is shifted towards red in the case of tooth decay.
- the point-by-point image of the report of the spectral intensity measurements makes it possible to eliminate the influence of the shape of the surface of the illuminated area of the tooth and therefore to overcome variations due to the presence of grooves or wells in the dental surface, the inclination of this surface relative to the optical axis of the detection device, and the non-uniformity of the lighting of the examined area of the tooth.
- the method according to the invention thus allows reliable and precise detection of dental caries, even at an early stage of their development. It also makes it possible to precisely control the effectiveness of a surgical intervention to remove demineralized dental material, so as to achieve the complete elimination of the decayed parts without altering the healthy parts of the tooth.
- the wavelength of the lighting light is between approximately 300 and 370 nm and the spectral intensity of the fluorescence emitted is measured in a band of wavelengths which s extends between the excitation wavelength and a wavelength between 450 and 600 nm approximately and in a wavelength band which extends from 550-600 to 750-800 nm approximately.
- the method consists in illuminating said area of the tooth with alternating light pulses at the aforementioned wavelength and at a wavelength of the visible spectrum, to be taken with the video means images of said area illuminated successively at these two wavelengths and to transmit them to image processing and display means.
- this method also consists in accumulating images taken at these two wavelengths before processing them and displaying an image of the fluorescence emitted by the illuminated area of the tooth and an image of this area illuminated in visible light.
- This dual display allows the practitioner to accurately view and locate the examined area of the tooth.
- the same laser generator can be used to produce fluorescence excitation pulses and visible light illumination pulses, these pulses having a duration of between several microseconds and a nanosecond or less for example, the laser generator can also be used to produce synchronization pulses, for example in infrared.
- a laser generator of the Nd: YAG-Qs itch type which produces pulses of very short duration at wavelengths of 1064 nm for synchronization, of 532 ' nm (second harmonic) for lighting visible and 355 nm (third harmonic) for excitation of fluorescence.
- the invention also provides a device for carrying out the method described above, this device comprising a monochromatic light source, optical means for lighting an area of the tooth with the light emitted by said source and for taking up light from the tooth, means for transmitting the light taken up to spectral filtering means, photoreceptors capturing the light leaving the spectral filtering means and processing means receiving the output signals from the photoreceptors, this device being characterized in that the source emits on a wavelength chosen to excite a fluorescence emission by the mineral part of the tooth, in that it comprises video means for taking images of the illuminated area of the tooth , associated with shutter or time gate means for alternately taking pictures of fluorescence of the tooth in bands of wavelengths in the parts high energy and low energy respectively of the emission spectrum and images of the tooth illuminated in visible light, and in that the information processing means are provided for reporting, at each point of the image, the intensities measured in said wavelength bands of the emission spectrum.
- the spectral filtering means used include, for example, interchangeable color filters,
- the transmission means comprise a fiber optic image guide or a glass rod horoscope having a transverse gradient of refractive index.
- FIG. 1 schematically represents the essential components of the device according to the invention
- FIG. 3 schematically represents the fluorescence spectra of different parts of a tooth and the wavelength bands used for measuring the spectral intensity of the fluorescence
- Figure 4 is a graph showing 'the variations in the ratios of the measured fluorescence intensities in both wavelength bands wave for different parts of a tooth.
- the method and the device according to the invention are based on the illumination of an area 12 of a tooth 10 by a beam 14 of monochromatic ultraviolet light exciting a fluorescence emission by the mineral part of the tooth and on the detection of fluorescence images of tooth zone 12 in two bands of different wavelengths, in the ' high energy part and in the low energy part of the emission spectrum, the point-to-point ratio of spectral intensity measurements fluorescence in these two bands making it possible to determine whether or not the zone 12 examined of the tooth has a cavity.
- caries is an infectious disease the lesions of which are signs and symptoms which appear long after the primary infection and the initiation of the pathological process, when prevention has not been made or has failed, the lesions being due to physicochemical phenomena according to which the acids produced by the metabolism of the bacterial plaque cause a demineralization of the surface of the calcified tissues of the tooth.
- the detection of dental pathologies is essentially based on direct and tactile visual evaluations of a practitioner or on X-ray radiographs. The ionizing nature of X-ray radiographs does not allow them to be used repeatedly and routinely for cavity prevention and care control.
- the visual assessment or tactile by a practitioner does not allow to detect caries at an early stage of their development where a remineralization of the attacked areas by the precipitation in situ of calcium and phosphate ions would be possible and would avoid a curative surgical intervention.
- the device according to the invention precisely allows this early detection, in a reliable and independent manner from individuals.
- the device according to the invention shown diagrammatically in FIG. 1, comprises a laser generator 16, for example of the Nd: YAG "Q-switch" type which produces pulses at different wavelengths, for example 1064 nm, 532 nm and 355 nm with a repetition frequency of 12 kHz and which is associated with means 18 of spectral filtering and a lens 20 for focusing on the input of an optical fiber 22 for transmitting pulses 14 which, at the output of the optical fiber 22, pass through an objective 24 and are reflected by a mirror 26 towards the examined area 12 of the tooth 10.
- a laser generator 16 for example of the Nd: YAG "Q-switch" type which produces pulses at different wavelengths, for example 1064 nm, 532 nm and 355 nm with a repetition frequency of 12 kHz and which is associated with means 18 of spectral filtering and a lens 20 for focusing on the
- the spectral filtering means 18 comprise for example two interchangeable color filters, one of which transmits the wavelengths of 355 n and stops the wavelengths of 532 nm and the other of which, conversely, transmits the lengths of 532 nm wave and stops the wavelengths of 355 nm.
- These two filters are mounted on a support of the electromechanical type for example, which makes it possible to place them in turn on the output of the laser generator 16.
- the means 24, 26 for lighting the zone 12 of the tooth also form means for resuming the emitted fluorescence 28 which is focused on the input of optical transmission means 30 such as for example an image guide formed by a bundle of optical fibers.
- the means 22, 24, 26, 30 are advantageously combined into a single-piece assembly which the practitioner can hold with one hand and the end of which he can introduce into the mouth of a patient for examining the patient's teeth.
- the light beam 28 leaving the transmission means 30 is directed towards video acquisition means 32, through a lens 34, means 36 for spectral filtering and means 38 forming a shutter or time gate.
- the spectral filtering means 36 comprise two color filters of the bandpass type, one of which transmits the wavelengths between the excitation wavelength and approximately 450-600 nm and the other of which transmits those between 550-600 and 750-800 nm approximately.
- the means 38 forming a shutter or time gate are controlled to allow the video acquisition means 32 to pass either the wavelengths of the high energy band, or those of the low energy band, or even those corresponding to the pulses at the wavelength of 532 nm which are reflected and scattered by the examined area 12 of the tooth.
- the colored filters of the means 36 are mounted on the same support of the electromechanical type which interposes them in turn on the optical axis of the light leaving the transmission means 30 and which places none on this axis during the transmission of the light corresponding to the reflection and diffusion of the pulses at the wavelength of 532 nm.
- the means 38 forming a shutter or time gate are formed for example by an image intensifier with voltage modulation on the acceleration grid, this shutter remaining open only for the passage of fluorescence and visible light pulses coming from tooth 10 When this shutter is closed, it blocks all light that does not carry information on the properties of the tooth surface.
- the image acquisition means 32 are preferably formed by a black and white matrix camera with photoreceptors of the CCD type, the output of which is connected to the input of information processing means 40, such as a microphone. - PC or similar type computer.
- Synchronization means 42 are associated with the information processing means 40, the generator 16, the filtering means 18 and 36, the shutter means 38 and the video acquisition means 32. These synchronization means 42 receive the synchronization pulses produced at the wavelength of 1064 nm by the laser generator 16.
- the means 22, 24, 26, 30 form a probe which the practitioner can hold and orient towards the zone 12 to be examined on the tooth 10.
- the pulses emitted by the laser generator at the lengths of waves of 532 and 355 nm are transmitted alternately by the means of spectral filtering 18 and the optical fiber 22, towards the zone 12 of the tooth.
- the pulses at 355 nm are absorbed by the components of the tissues of the dental surface, which de-excite by emitting fluorescence for a very short time, typically a few nanoseconds.
- the pulses of visible light at the wavelength of 532 nm are reflected and diffused by the tooth surface.
- the light pulses from the tooth are picked up by the optical means 24, 26, and transmitted by the means 30 to the spectral filtering means 36 associated with the video acquisition means 32 by the means 38 forming a shutter or time gate.
- the video images acquired by the means 32 are transmitted to the information processing means 40 and are displayed on appropriate means, in particular on a display screen.
- the processing carried out by the means 40 comprises at 78 a storage of fluorescence images in high energy band 80 and a storage of fluorescence images in low energy band 82, as well as a processing 84 of fluorescence images and a storage 86 of the images in visible light, then in 88 a display 90 of the resulting images of fluorescence and of the resulting images 92 in visible light.
- the device operating steps can be swapped.
- the processing of the fluorescence images which is carried out at 84 consists in measuring the spectral intensity of the fluorescence emitted in the aforementioned high and low energy bands, making their report and comparing it with predetermined values.
- the processing carried out on the fluorescence images in the passbands E and F consists in measuring the intensity of the energy of the fluorescence in these two bands and in reporting them.
- Three examples of variations of this ratio are shown diagrammatically in FIG. 4, as a function of a dimension of space represented on the abscissa and measured on the tooth.
- the ratio of fluorescence energy in the high energy band / fluorescence energy in the low energy band of the emission spectrum can vary between values which are between 2 and 3 approximately for the enamel, which are substantially equal. to 4 for dentin and which are between 0.5 and 1 for the decayed parts.
- the ratio of these intensities to the fluorescence images makes it possible to overcome the shape of the examined surface of the tooth, that is to say the presence of grooves or wells, as well as the inclination of this. surface relative to the axis lighting optics and non-uniformity of lighting.
- the display of fluorescence images and visible light images on a display screen allows the practitioner to precisely locate the decayed area of a tooth. It is also possible to represent the variations in the ratios of the fluorescence energies in false colors, so that, for example ', the decayed areas appear in red and are clearly visible to the practitioner.
- the image transmission means 30 which, in a preferred embodiment of the invention, comprise a flexible image guide having for example a millimeter in diameter and a length of about one meter and which may include thirty thousand individual optical fibers can be replaced by a system of mirrors and lenses or by a horoscope based on the use of a glass rod with a transverse gradient of refractive index.
- the spectral filtering means can consist of an acousto-optical filter, a set of dichroic mirrors, a liquid crystal filter, etc.
- the video acquisition means 32 which are formed by a matrix of CCD sensors in the preferred embodiment of the invention, can be replaced by arrays of photodiodes, vidicon, CMOS sensors, with an analog video output or digital, monochrome or color.
- the means 22 for transmitting the lighting light may comprise several optical fibers, which are arranged at their ends for an effective uniform injection of the intensity of the laser beam produced by the generator 16 and at the other end for uniform illumination of area 12 of the tooth.
- optical lighting and recovery means 24, 26 can also use optical lighting and recovery means 24, 26 different from those which have been described and shown.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- Dentistry (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002592800A JP2004526550A (ja) | 2001-06-01 | 2002-05-27 | 歯のイメージを獲得し、処理するための方法および装置 |
EP02740822A EP1392158A1 (fr) | 2001-06-01 | 2002-05-27 | Procede et dispositif d'acquisition et de traitement d'images d'une dent |
CA002448936A CA2448936A1 (fr) | 2001-06-01 | 2002-05-27 | Procede et dispositif d'acquisition et de traitement d'images d'une dent |
US10/720,998 US20040236232A1 (en) | 2001-06-01 | 2003-11-24 | Method and apparatus for acquiring and processing images of a tooth |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR01/07274 | 2001-06-01 | ||
FR0107274A FR2825260B1 (fr) | 2001-06-01 | 2001-06-01 | Procede et dispositif de detection de caries dentaires |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/720,998 Continuation US20040236232A1 (en) | 2001-06-01 | 2003-11-24 | Method and apparatus for acquiring and processing images of a tooth |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002096281A1 true WO2002096281A1 (fr) | 2002-12-05 |
Family
ID=8863922
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2002/001776 WO2002096281A1 (fr) | 2001-06-01 | 2002-05-27 | Procede et dispositif d'acquisition et de traitement d'images d'une dent |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040236232A1 (fr) |
EP (1) | EP1392158A1 (fr) |
JP (1) | JP2004526550A (fr) |
CA (1) | CA2448936A1 (fr) |
FR (1) | FR2825260B1 (fr) |
WO (1) | WO2002096281A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856546A1 (fr) | 2003-06-17 | 2004-12-24 | Centre Nat Rech Scient | Procede et dispositif d'acquisition et de traitement d'images d'un objet tel qu'une dent |
JP2005204869A (ja) * | 2004-01-22 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 歯茎観察装置 |
WO2008027323A2 (fr) * | 2006-08-31 | 2008-03-06 | Carestream Health, Inc. | Procédé de détection des caries |
US8345942B2 (en) | 2005-10-31 | 2013-01-01 | Carestream Health, Inc. | Method and apparatus for detection of caries |
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US20040254478A1 (en) * | 2003-05-22 | 2004-12-16 | De Josselin De Jong Elbert | Fluorescence filter for tissue examination and imaging |
FR2858205B1 (fr) * | 2003-07-28 | 2005-09-16 | Sopro Soc | Appareil de detection et de caracterisation des tissus biologiques |
US8616967B2 (en) | 2004-02-25 | 2013-12-31 | Cfph, Llc | System and method for convenience gaming |
US7324661B2 (en) * | 2004-04-30 | 2008-01-29 | Colgate-Palmolive Company | Computer-implemented system and method for automated and highly accurate plaque analysis, reporting, and visualization |
US7270543B2 (en) * | 2004-06-29 | 2007-09-18 | Therametric Technologies, Inc. | Handpiece for caries detection |
JP4496135B2 (ja) * | 2005-06-13 | 2010-07-07 | 株式会社モリタ製作所 | 歯科用照明装置及び歯科診療装置 |
CA2517252A1 (fr) * | 2005-08-29 | 2007-02-28 | Neks Technologies Inc. | Detection de la carie interproximale a l'aide d'une sonde optique examinant la surface occlusale de la dent |
US7577284B2 (en) * | 2006-04-21 | 2009-08-18 | Carestream Health, Inc. | Optical detection of dental caries |
EP2043509B2 (fr) * | 2006-07-25 | 2016-05-25 | The Procter and Gamble Company | Procédés et produits destinés à analyser des tissus gingivaux |
US8360771B2 (en) * | 2006-12-28 | 2013-01-29 | Therametric Technologies, Inc. | Handpiece for detection of dental demineralization |
FR2924808B1 (fr) * | 2007-12-11 | 2010-09-03 | Commissariat Energie Atomique | Systeme d'analyse par fluorescence d'un champ dans une zone eclairee |
US8866894B2 (en) * | 2008-01-22 | 2014-10-21 | Carestream Health, Inc. | Method for real-time visualization of caries condition |
GB0807611D0 (en) * | 2008-04-25 | 2008-06-04 | Univ Manchester | Dental imaging and apparatus thereof |
JP5276006B2 (ja) * | 2008-05-13 | 2013-08-28 | パナソニック株式会社 | 口腔内測定装置及び口腔内測定システム |
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KR101804696B1 (ko) | 2016-08-17 | 2017-12-06 | 연세대학교 산학협력단 | 광을 이용하여 구강 질환을 유발하는 박테리아의 존재 가능성을 관찰 또는 결정하는 방법 및 이를 이용한 박테리아의 제거 방법 |
CN106442439B (zh) * | 2016-08-31 | 2020-06-12 | 马东阁 | 一种oled膀胱检测设备及方法 |
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FR2250506A1 (fr) * | 1973-11-12 | 1975-06-06 | Alphametrics Ltd | |
US5306144A (en) * | 1992-01-14 | 1994-04-26 | Kaltenbach & Voigt Gmbh & Co. | Device for detecting dental caries |
DE9317984U1 (de) * | 1993-11-24 | 1995-03-23 | Kaltenbach & Voigt | Vorrichtung zum Erkennen von Karies |
EP0830851A1 (fr) * | 1993-09-30 | 1998-03-25 | Cedars-Sinai Medical Center | Dispositif endodontique à fibre optique et procédé |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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IT1155790B (it) | 1978-01-25 | 1987-01-28 | Crozzoli Gualtiero | Succhiello flessibile |
US4290433A (en) * | 1979-08-20 | 1981-09-22 | Alfano Robert R | Method and apparatus for detecting the presence of caries in teeth using visible luminescence |
US4479499A (en) | 1982-01-29 | 1984-10-30 | Alfano Robert R | Method and apparatus for detecting the presence of caries in teeth using visible light |
US4836206A (en) * | 1987-02-25 | 1989-06-06 | The United States Of America As Represented By The Department Of Health And Human Services | Method and device for determining viability of intact teeth |
US6246479B1 (en) * | 1998-06-08 | 2001-06-12 | Lj Laboratories, L.L.C. | Integrated spectrometer assembly and methods |
US6584341B1 (en) * | 2000-07-28 | 2003-06-24 | Andreas Mandelis | Method and apparatus for detection of defects in teeth |
-
2001
- 2001-06-01 FR FR0107274A patent/FR2825260B1/fr not_active Expired - Fee Related
-
2002
- 2002-05-27 EP EP02740822A patent/EP1392158A1/fr not_active Withdrawn
- 2002-05-27 JP JP2002592800A patent/JP2004526550A/ja not_active Withdrawn
- 2002-05-27 WO PCT/FR2002/001776 patent/WO2002096281A1/fr not_active Application Discontinuation
- 2002-05-27 CA CA002448936A patent/CA2448936A1/fr not_active Abandoned
-
2003
- 2003-11-24 US US10/720,998 patent/US20040236232A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2250506A1 (fr) * | 1973-11-12 | 1975-06-06 | Alphametrics Ltd | |
US5306144A (en) * | 1992-01-14 | 1994-04-26 | Kaltenbach & Voigt Gmbh & Co. | Device for detecting dental caries |
EP0830851A1 (fr) * | 1993-09-30 | 1998-03-25 | Cedars-Sinai Medical Center | Dispositif endodontique à fibre optique et procédé |
DE9317984U1 (de) * | 1993-11-24 | 1995-03-23 | Kaltenbach & Voigt | Vorrichtung zum Erkennen von Karies |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2856546A1 (fr) | 2003-06-17 | 2004-12-24 | Centre Nat Rech Scient | Procede et dispositif d'acquisition et de traitement d'images d'un objet tel qu'une dent |
WO2005002429A1 (fr) | 2003-06-17 | 2005-01-13 | Centre National De La Recherche Scientifique | Procede et dispositif d’acquisition et de traitement d’images d’un objet tel qu’une dent |
JP2005204869A (ja) * | 2004-01-22 | 2005-08-04 | Matsushita Electric Ind Co Ltd | 歯茎観察装置 |
US8345942B2 (en) | 2005-10-31 | 2013-01-01 | Carestream Health, Inc. | Method and apparatus for detection of caries |
US8396272B2 (en) | 2005-10-31 | 2013-03-12 | Carestream Health, Inc. | Method and apparatus for detection of caries |
US9247241B2 (en) | 2005-10-31 | 2016-01-26 | Carestream Health, Inc. | Method and apparatus for detection of caries |
WO2008027323A2 (fr) * | 2006-08-31 | 2008-03-06 | Carestream Health, Inc. | Procédé de détection des caries |
WO2008027323A3 (fr) * | 2006-08-31 | 2008-05-08 | Carestream Health Inc | Procédé de détection des caries |
US7668355B2 (en) | 2006-08-31 | 2010-02-23 | Carestream Health, Inc. | Method for detection of caries |
US8447083B2 (en) | 2006-08-31 | 2013-05-21 | Carestream Health, Inc. | Method for detection of caries |
Also Published As
Publication number | Publication date |
---|---|
CA2448936A1 (fr) | 2002-12-05 |
US20040236232A1 (en) | 2004-11-25 |
JP2004526550A (ja) | 2004-09-02 |
FR2825260A1 (fr) | 2002-12-06 |
EP1392158A1 (fr) | 2004-03-03 |
FR2825260B1 (fr) | 2004-08-20 |
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