WO1994020011A2 - Dental diagnostic instrument - Google Patents
Dental diagnostic instrument Download PDFInfo
- Publication number
- WO1994020011A2 WO1994020011A2 PCT/DE1994/000267 DE9400267W WO9420011A2 WO 1994020011 A2 WO1994020011 A2 WO 1994020011A2 DE 9400267 W DE9400267 W DE 9400267W WO 9420011 A2 WO9420011 A2 WO 9420011A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diagnostic instrument
- instrument according
- optics
- head
- handle
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/02—Details of sensors specially adapted for in-vivo measurements
- A61B2562/0233—Special features of optical sensors or probes classified in A61B5/00
- A61B2562/0238—Optical sensor arrangements for performing transmission measurements on body tissue
Definitions
- the invention relates to a dental diagnostic instrument of the type specified in claim 1.
- DE-33 13 306-A1 or DE-38 27 501-Al - devices for in vivo measurement of the flow and / or the 'oxygen content of the blood be - Knows, which are based on the (especially spectrophotometric) evaluation of light scattering or absorption by the blood in the infrared range.
- these methods are not imaging, and are therefore not suitable for examining structures inside the body.
- the object of the invention is to create a device of the type mentioned at the outset, which allows convenient handling with high image resolution in diagnostics in the dental field.
- the invention includes the finding that the radiological examination in the dental field is best achieved if the transmitter and receiver working on a wavelength that is favorable for fluoroscopy can be brought as close as possible to the region to be examined for the examination, so that On the one hand, the greatest possible wavelength-specific illuminance is available for penetrating the tissue area in question and, on the other hand, the greatest possible pixel-based resolution is available for viewing.
- the invention further includes the idea that for
- the transmitting and receiving components lie in a U-shaped manner in the area of the U-shaped area that bridges the area to be viewed or that consists of two parts that are to be kept separate but are at least interconnected via a line and that form the transmitter and receiver in the palate area and thereby bridges the row of teeth to be examined or the adjoining jaw area. It is preferably angled so that the position of the diagnostic head can be adjusted in relation to the row of teeth to be examined.
- the handle can thus be guided in an essentially constant direction for easier handling and for traversing the mouth opening of the patient, while the direction of the IR radiation is adapted to the direction of the tooth region to be examined, the radiation being essentially radial.
- the instrument designed in this way enables a simultaneous imaging examination of the internal condition of the teeth, tooth replacement parts, tooth roots and the surrounding tissue in real time directly in the treatment area and at any time during the dental treatment, and without any risk to the patient or the doctor and essentially with the handles familiar from the usual external examination of the teeth and the surrounding tissue.
- the instrument also enables the storage and processing of the recorded images and, if required, the immediate acquisition and feeding of supplementary image information in an interactive manner and thus offers the dentist altogether completely new diagnostic possibilities immediately and directly at the work place, without involving auxiliary personnel and laboratory technology.
- the patient remains free of any radiation exposure, such as occurs in X-rays, for example.
- the IR receiving optics arranged in the recording head have an image converter device.
- the conversion of the recorded optical signals into electrical signals takes place immediately in the recording head, and electrical signals are forwarded to the handle and to the evaluation and display unit.
- the receiving optics preferably have a lens with changeable focusing, which enables focusing on different depth zones of the tissue to be viewed.
- the depth of field can be changed by an adjustable aperture.
- the image converter preferably has an areal (matrix-like) arrangement of miniaturized IR photo sensors or detectors, which can be integrated in particular in a semiconductor circuit.
- the IR transmission optics in the recording head a flat has adhesive arrangement of miniaturized semiconductor photodiodes or lasers.
- the second is that the IR transmission optics have a measuring beam generated in the receiving, supplying and display device or in the handle, and for beam shaping.
- An infrared transmitter with controllable beam power is preferably provided, which thus enables the penetration depth of the emitted IR radiation to be adapted to a different nature and thickness of the tissue area to be examined.
- the wavelength of the IR radiation used can be changed, another set of IR diodes preferably being switched on, so that different information is available with the changed wavelength can be obtained via the tissue under consideration.
- the instrument is used for the diagnosis of the and can also be used for those of the upper jaw without changes or adjustments by simply swiveling through 180 °.
- a source of visible light is additionally provided on the recording head with a preferred radiation direction, which is directed essentially parallel to the receiving direction of the receiving optics of the recording head, so that a view from above is also possible at least alternately.
- a "blur-free" recording of successive images can also be ensured within the scope of the image processing itself by appropriate logic - in particular by the circuitry used in video cameras to suppress the influence of undesired movements.
- 1 shows a first exemplary embodiment of the dental diagnostic instrument according to the invention in a perspective external view
- 2 shows a (schematic) block diagram of the functional modules of the instrument shown above
- Fig. 3 is a perspective view of another embodiment of the invention as well
- FIG. 4 shows a representation of the handling of the embodiment according to FIG. 3.
- an illumination unit 201 is connected to a camera part 202 via a cable 204 serving for the power supply for the light transmitter 203 provided in the illumination unit.
- the further connecting line 205 to the camera part leads to a screen unit (not shown) in which a power supply part and a monitor are provided, in which the images recorded with the camera part can be viewed.
- the areas illuminated by the light source 203 give an image which is recorded through an opening 206 in the camera unit.
- a deflection mirror 207 which is provided at the end of a tapered shaft part, the light received reaches a combined filter and optics unit 208, by means of which the light wavelength ranges relevant for image reproduction are filtered out on the one hand, and an image via a further deflection mirror 209 on the other is generated on a CCD target 210.
- the CCD target 210 is located in an extended grip part of the camera part.
- An actuating element 211 designed as a pushbutton serves to "stop" the transmitted image, so that picture details can be viewed at rest during the still picture reproduction initiated thereby. A double actuation of the element 211 in quick succession leads to the still image being stored in an image memory for later retrieval.
- the output of a "hard copy" can also be initiated via a printer.
- a connecting element 212 which, at its widened end regions, has clamping elements which at least partially encompass the shafts of the lighting and camera parts, provides a firm connection between these two parts of the device, if necessary, so that they can be held and guided with one hand .
- the connecting element 212 is preferably made of plastic and can be snapped onto the handle parts with a correspondingly resilient design.
- the lighting unit which is either broadband or essentially precisely adapted to the filter characteristics of the filter and optics unit 208 with respect to the wavelength ranges to be emitted, is located near the free end of the lighting part 203.
- an angling is provided, which is directed towards light source 203.
- the bend has an angle in a range that also corresponds to the bend of dental mirrors. This angle is preferably between 20 and 30 °.
- An additional reflected light observation is possible by means of a light source 214 attached to the shaft of the camera part, the wavelength range of which corresponds to that of the light source 203 of the lighting part.
- the light source 214 can be switched on with a further actuating element (not shown), which can correspond in its arrangement and design to the pushbutton 211. If both light sources are activated at the same time, the brightness of the reflected light source 214 is selected such that the reflected light does not outshine the transillumination, but merely provides an orientation aid by the "superimposed" reflected light image.
- the jaw region 215 is viewed in the manner shown.
- the diagnostic head 2 contains in one of its two side walls an IR transmitter optics 9 with adjustable beam power, which operates at predetermined wavelengths in the range between 500 and 1300 nm and selected an integrated matrix arrangement 256x256 according to the wavelength used has light-emitting diodes (LED) made of an AIII-BV semiconductor material and optical elements for beam shaping.
- LED light-emitting diodes
- the entire LED array can be exchanged for one with diodes which emit IR light of a different wavelength, so that details of the tissue to be examined are viewed at different wavelengths can be used to draw conclusions about to be able to gain special properties of the relevant tissue areas.
- the radiation power can be controlled by means of an adjustable diaphragm or by switching diodes on or off.
- the diagnostic head 2 contains an IR receiving optics 10, which likewise have elements for beam shaping and an integrated matrix arrangement in the wavelength range of the transmitting diodes of sensitive semiconductor CCDs - Has photo detectors, which record the radiation that has passed through the irradiated area of the dentition and convert it into electrical signals.
- the optics on the receiving side can be focused on different depth ranges of the object.
- the depth of field can also be varied by means of a diaphragm, the intensity of the radiation source possibly being changed in opposite directions in order to achieve a constant received light intensity.
- the two side cheeks 2b, 2c of the diagnostic head 2 are at a distance of the order of 1 to 2 cm, as well as a height and a width of about 2 to 3 cm, which allow the teeth to be extended in their entire length from the root area to to the bite surface as well as two adjacent teeth.
- the transmitter optics is supplied with power via a transmitter power supply 17 contained in the supply, evaluation and display unit 16 when the transmitter switch 18 is closed, as are the other components of the device, where for the sake of clarity, however, the corresponding power lines are not shown.
- the evaluation assembly is controlled in such a way that it is possible to switch from the moving image playback to the last recorded individual image or a previously recorded image from a memory (actuating elements 12 or 13). Finally, the recording of currently recorded images can also be triggered in the memory (actuating element 15).
- An input unit 22 which is designed, for example, as a conventional computer keyboard with mouse control or has a functional unit with the screen 21 as an interactive display, is used to enter the desired operating parameters of the device and also specifications for the image processing, etc. From here, the functions of digital image postprocessing can be triggered if necessary.
- the transmitter and receiver are provided in a head 2 provided jointly on a shaft with a handle 3.
- This head 2 is pivotally mounted about an axis 211 extending through one of the free legs of a "U", the bearing being located at the free end of a rod-shaped extension of the handle 31.
- the receiver optics is arranged in that leg of the "U" -shaped head 21 which also contains the axis of rotation, the received IR Radiation is guided directly into the handle by means of an optical waveguide, where a CCD array is located.
- An IR radiation source is provided in the other free leg of the "U".
- the rod-shaped extension 41 of the handle 31 is angled slightly (in the drawing downwards) in the vicinity of the pivot bearing for the diagnostic head, so that the axis of rotation can assume a substantially vertical position, while the handle makes an angle in the range of approx. 45 to the vertical.
- the U-shaped diagnostic head 21 can thus be guided in a saddle-shaped manner on the row of teeth, sliding along it.
- the bridge-like passage of the "U” has a sufficient depth to be guided under alignment according to the arch of the row of teeth without its own drive.
- FIG. 4 shows the handling of the exemplary embodiment according to FIG. 3 in more detail.
- the device is guided over a row of teeth shown in plan view.
- the handling and function of the dental diagnostic instrument in the described embodiment is explained below with reference to FIGS. 1 to 3.
- the dentist grasps the handle 3 with the guide rod 4 and the diagnostic head 2 in a manner similar to a tooth mirror and guides the diagnostic head to the dentition area of a patient to be examined such that this area is enclosed by the two side cheeks 2b and 2c.
- the signal converted into an electrical signal in the CCD array of the receiving optics 10, which signal is based on the different IR absorption in different "soft" tissue 1 (well or poorly perfused gums, accumulation of pus, highly water-containing tissue), teeth and Contains jaw information based structural information about the area to be examined is fed to the evaluation module 20 and subjected to post-processing there.
- the result of this processing is displayed to the dentist on the screen 21 as a pictorial representation of the internal structure of the examined area.
- further recordings can be made by pivoting the diagnostic head, which also gives the possibility of generating a 3D image - including its further processing by rotating around the spatial axis ⁇ sen - opened.
- an improved evaluation can be shown by displaying the recorded structure with assignment of defined false colors to areas of different absorption with higher contrast.
- a modification which is particularly advantageous for the routine generation of three-dimensional images includes the provision of a fastening device on the diagnostic head 2 or on the guide rod 4 for its temporary attachment to the patient's dentition, thereby preventing movements of the patient between successive ones Recordings complicate the synthesis of a three-dimensional image from these recordings.
- the measurement beam generation as well as the image conversion or one of the two, not in the diagnostic head, but in the handle or in the supply, evaluation and display unit and the transmission and / or receive radiation to the diagnostic head via optical fibers or to derive from it.
- This will be particularly useful on the transmission side if instead miniaturized semiconductor radiation sources such as a (more voluminous and heavier) solid-state or gas laser should be used.
- miniaturized semiconductor radiation sources such as a (more voluminous and heavier) solid-state or gas laser should be used.
- a combination of battery power supply in the handle and an infrared signal transmission path can also be provided.
- the embodiment of the invention is not limited to the preferred embodiment described above. Rather, a number of variants are conceivable which make use of the solution shown, even in the case of fundamentally different types.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94910327A EP0688180A1 (en) | 1993-03-09 | 1994-03-09 | Dental diagnostic instrument |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934307411 DE4307411A1 (en) | 1993-03-09 | 1993-03-09 | Dental examination instrument |
DEP4307411.1 | 1993-03-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994020011A2 true WO1994020011A2 (en) | 1994-09-15 |
WO1994020011A3 WO1994020011A3 (en) | 1994-10-13 |
Family
ID=6482337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1994/000267 WO1994020011A2 (en) | 1993-03-09 | 1994-03-09 | Dental diagnostic instrument |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0688180A1 (en) |
DE (1) | DE4307411A1 (en) |
WO (1) | WO1994020011A2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2352512A (en) * | 1999-07-23 | 2001-01-31 | Toshiba Res Europ Ltd | A radiation probe and dectecting tooth decay |
DE10049835A1 (en) * | 2000-07-27 | 2002-02-07 | Cobra Electronic Gmbh | Miniature camera for dentistry has pinhole aperture and LED light avoids stray light |
WO2005013843A2 (en) * | 2003-08-08 | 2005-02-17 | The Regents Of The Univeristy Of California | Near-infrared transillumination for the imaging of early dental decay |
US6964567B2 (en) | 2001-04-27 | 2005-11-15 | Ivoclar Vivadent Ag | Dental camera with mouthpiece |
US7006126B2 (en) | 2001-06-01 | 2006-02-28 | Ivoclar Vivadent Ag | Color analyzing apparatus with polarized light source |
US8556625B2 (en) | 2005-12-08 | 2013-10-15 | Luxray Dental Systems, Inc. | Infrared dental imaging |
WO2017136471A1 (en) * | 2016-02-01 | 2017-08-10 | Martin Marco | Dental imager and method for recording photographic impressions |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6714657B1 (en) | 1996-12-31 | 2004-03-30 | Electro-Optical Sciences Inc. | Apparatus for holding optical instruments in a reproducible position with respect to teeth |
US6201880B1 (en) * | 1996-12-31 | 2001-03-13 | Electro-Optical Sciences | Method and apparatus for electronically imaging a tooth through transillumination by light |
GB9710561D0 (en) * | 1997-05-23 | 1997-07-16 | Medical Laser Technologies Lim | Non-invasive diagnostic equipment |
JP2001275964A (en) | 2000-03-29 | 2001-10-09 | Matsushita Electric Ind Co Ltd | Video scope |
DE10120717B4 (en) * | 2001-04-27 | 2005-03-24 | Ivoclar Vivadent Ag | Dental camera |
US20040122306A1 (en) * | 2002-12-20 | 2004-06-24 | Eastman Kodak Company | Intra-oral imaging system and method for dimensional measurement below the gumline |
DE102006041020B4 (en) * | 2006-09-01 | 2015-01-22 | Kaltenbach & Voigt Gmbh | System for transilluminating teeth and head piece therefor |
DE102006063000B3 (en) | 2006-09-01 | 2019-06-27 | Kaltenbach & Voigt Gmbh | System for transilluminating teeth |
DE102006062998B3 (en) | 2006-09-01 | 2019-06-27 | Kaltenbach & Voigt Gmbh | System for transilluminating teeth |
JP2020054751A (en) * | 2018-10-04 | 2020-04-09 | 株式会社タニタ | Inspection head and periodontal disease inspection device |
WO2022043911A1 (en) * | 2020-08-28 | 2022-03-03 | Dental Scanner Solutions Kft. | Dental scanner apparatus |
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EP0123548A1 (en) * | 1983-04-26 | 1984-10-31 | Wayne A. Provost | Apparatus and method for detecting cavities |
USRE31815E (en) * | 1979-08-20 | 1985-01-29 | Philips Medical Systems, Inc. | Method and apparatus for detecting the presence of caries in teeth using visible luminescence |
EP0326497A2 (en) * | 1988-01-28 | 1989-08-02 | Fuji Optical Systems, Inc. | Electronic video dental camera and dental instrument |
US4858001A (en) * | 1987-10-08 | 1989-08-15 | High-Tech Medical Instrumentation, Inc. | Modular endoscopic apparatus with image rotation |
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DE3034944C2 (en) * | 1980-09-01 | 1985-01-17 | Gerhard Dr. 8029 Sauerlach Busse | Method and device for the photothermal structure investigation of solid bodies |
DE3832811A1 (en) * | 1988-09-28 | 1990-04-05 | Kulzer & Co Gmbh | LIGHT GUIDE FOR A LIGHTING DEVICE FOR DENTAL PURPOSES |
JPH02185242A (en) * | 1988-12-21 | 1990-07-19 | Demetoron Res Corp | Photoguide apparatus used for restoring tooth |
DE59010788D1 (en) * | 1989-03-13 | 1998-02-12 | Kraus Manfred | Method and arrangement for displaying structures |
DE4007957A1 (en) * | 1990-03-13 | 1991-09-19 | Com Dent Gmbh Telecommunicatio | Measuring vol., esp. inside of mouth dentures - by evaluating light reflected from interior surfaces, including translucent teeth |
DE9007569U1 (en) * | 1990-03-23 | 1992-09-24 | Kaltenbach & Voigt Gmbh & Co, 7950 Biberach, De | |
DE4015988A1 (en) * | 1990-05-18 | 1991-11-21 | Max Planck Ges Ev | IR tomograph based on confocal imaging principal - uses either IR radiation source for computer tomography or IR radiation from cells in biological tissue |
DE4110228A1 (en) * | 1991-03-28 | 1992-10-01 | Pco Computer Optics Gmbh | Endoscopic examination device for detecting cancer tissue - uses pulsed light source to illuminate examined area with fluorescence marking material for cancer |
-
1993
- 1993-03-09 DE DE19934307411 patent/DE4307411A1/en not_active Ceased
-
1994
- 1994-03-09 EP EP94910327A patent/EP0688180A1/en not_active Withdrawn
- 1994-03-09 WO PCT/DE1994/000267 patent/WO1994020011A2/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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USRE31815E (en) * | 1979-08-20 | 1985-01-29 | Philips Medical Systems, Inc. | Method and apparatus for detecting the presence of caries in teeth using visible luminescence |
EP0123548A1 (en) * | 1983-04-26 | 1984-10-31 | Wayne A. Provost | Apparatus and method for detecting cavities |
US4858001A (en) * | 1987-10-08 | 1989-08-15 | High-Tech Medical Instrumentation, Inc. | Modular endoscopic apparatus with image rotation |
US4858001B1 (en) * | 1987-10-08 | 1992-06-30 | High Tech Medical Instrumentat | |
EP0326497A2 (en) * | 1988-01-28 | 1989-08-02 | Fuji Optical Systems, Inc. | Electronic video dental camera and dental instrument |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2352512A (en) * | 1999-07-23 | 2001-01-31 | Toshiba Res Europ Ltd | A radiation probe and dectecting tooth decay |
GB2352512B (en) * | 1999-07-23 | 2002-03-13 | Toshiba Res Europ Ltd | A radiation probe and detecting tooth decay |
US8027709B2 (en) | 1999-07-23 | 2011-09-27 | Teraview Limited | Radiation probe and detecting tooth decay |
DE10049835A1 (en) * | 2000-07-27 | 2002-02-07 | Cobra Electronic Gmbh | Miniature camera for dentistry has pinhole aperture and LED light avoids stray light |
DE10049835C2 (en) * | 2000-07-27 | 2003-04-03 | Cobra Electronic Gmbh | Miniaturized camera with a photosensitive CCD matrix arranged in a rod or tubular housing and an integrated lighting device |
US6964567B2 (en) | 2001-04-27 | 2005-11-15 | Ivoclar Vivadent Ag | Dental camera with mouthpiece |
US7006126B2 (en) | 2001-06-01 | 2006-02-28 | Ivoclar Vivadent Ag | Color analyzing apparatus with polarized light source |
WO2005013843A3 (en) * | 2003-08-08 | 2005-06-02 | Univeristy Of California | Near-infrared transillumination for the imaging of early dental decay |
WO2005013843A2 (en) * | 2003-08-08 | 2005-02-17 | The Regents Of The Univeristy Of California | Near-infrared transillumination for the imaging of early dental decay |
US8556625B2 (en) | 2005-12-08 | 2013-10-15 | Luxray Dental Systems, Inc. | Infrared dental imaging |
US9414750B2 (en) | 2005-12-08 | 2016-08-16 | Luxray Dental Systems, Inc. | Infrared dental imaging |
WO2017136471A1 (en) * | 2016-02-01 | 2017-08-10 | Martin Marco | Dental imager and method for recording photographic impressions |
US10542946B2 (en) | 2016-02-01 | 2020-01-28 | Marco Martin | Dental imager and method for recording photographic impressions |
Also Published As
Publication number | Publication date |
---|---|
DE4307411A1 (en) | 1994-09-15 |
WO1994020011A3 (en) | 1994-10-13 |
EP0688180A1 (en) | 1995-12-27 |
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