JP5593176B2 - Intraoral radiography display system - Google Patents

Description

  The present invention relates to a dental intraoral imaging system.

  Japanese Patent Application Laid-Open No. 62-246347 discloses an intraoral camera used for informed consent for displaying the oral cavity to a patient, explaining the state of dental caries, the progress of treatment, and future treatment policy and obtaining consent. Japanese Laid-Open Patent Publication No. 2001-29315 discloses a camera having an optical fiber disposed at the tip and having no illumination means. JP 2001-29315 is provided with a remote control type switch, which is connected to the tip by an electric lead wire. A configuration of a pen-type intraoral camera equipped with a camera that is operated with both hands is disclosed.

Japanese Patent Application Laid-Open No. 2005-334426 describes a configuration in which a plurality of intraoral image data captured in advance on a display are displayed.
Japanese Patent Laid-Open No. 2002-355262 discloses a pen-shaped intraoral camera provided with a camera at the tip, a small portable display device that displays an image captured by the camera, and a wireless that transmits the image to an external device. A transmission means is disclosed.

Japanese Patent Application Laid-Open No. 2005-304600 shows a configuration for confirming the appearance of a tooth, confirming the caries, and the adhesion status of dental calculus and plaque by a combination of an excitation light irradiation means and a light receiving filter that passes a specific wavelength range. ing.
Among these configurations, as the camera has become smaller, many methods have been proposed to directly shoot by inserting the camera body into the oral cavity, but the shot image becomes unclear due to shooting from a short distance. It is difficult to shoot in a limited space such as the back teeth. On the other hand, although an intraoral camera using a reflector is shown in Japanese Utility Model Publication No. 05-30402, it is simply a configuration for taking an image, and as with the type in which the camera is inserted into the oral cavity, an effective treatment, A configuration suitable for imaging purposes such as medical examination and dental practice is not disclosed.

JP-A-62-246347 JP 2001-29315 A JP 2002-355262 A JP 2005-304600 A No. 5-30402

  The configuration in which the camera is directly inserted into the oral cavity is taken from a close range, so it is difficult to obtain a clear image, and there are limited parts that can be clearly photographed, and a camera using a reflector has been proposed. However, this is also a configuration that only shoots, and does not indicate a relevance to the work process such as treatment, and it is difficult to say that it is a configuration that is linked to actual treatment in a part that is difficult to see such as the back teeth .

In view of the above, the present invention provides a gripping housing that can be held and held by a photographing unit that is a combination of a lighting member and a photographing member, and is disposed at a site where a finger can be operated when the gripping housing is gripped. A mirror surface portion that is detachably attached to the gripping housing, reflects the illumination light of the illumination member to illuminate the living body, and transmits the illuminated tissue surface to the imaging member. An intraoral imaging unit composed of a reflecting member arranged at a predetermined angle, and a combination of display means for displaying an image taken by the intraoral imaging unit arranged in a region that enters the user's field of view during imaging. A clear image is formed even in areas that are difficult to see and areas that are difficult to shoot, and by overlaying displays for treatment support such as grids and guidelines on the display, Even in difficult sites work of the eye, and realize that it is stable work.
Furthermore, a selection operation on the display unit, for example, a tool bar on which a plurality of buttons are arranged is displayed on the screen, and the display of this button is changed by the operation of switches mounted on the surface of the grip unit housing, By the way, a so-called GUI (graphical user interface) method is realized in which the functions related to the buttons are fixedly executed by pressing the same switches continuously or pressing other switches. The present invention makes it possible to perform treatment with the other hand while taking a picture with one hand, and to perform evaluation measurement before and after treatment, etc. while viewing the display on the display unit.
In addition to the case of selecting a toolbar on the screen with only switches, for example, if the display unit is a touch panel type, it is used in combination with a method of touching a predetermined part of the screen, a keyboard, a mouse, a touch pad, etc. Also good.

As the switches in the present invention, various types of switches such as a press type, a slide type, a rotary type, a type that can be rotated and pressed, and a touch switch type that can be touched with a finger are applicable.
These switches may be one or more, and switches using the different methods described above may be arranged.
That is, these switches may preferably have functions similar to those of a computer keyboard or mouse button.
The display means for displaying an image photographed by the photographing unit, and the display means arranged at the site that is in view of the operator even during treatment is a liquid crystal display monitor in the case of a desktop computer or a notebook computer Display, etc. may be used as long as they can be placed in the operator's field of view even during treatment, and the mobile phone monitor and the display unit of the PDA terminal are preferably used when giving freedom of movement. Is done.

Placing the display means at the part that enters the field of view at the time of imaging means entering the field of view during treatment, entering the field of view by turning the neck, or reflecting the monitor display using a separate reflector. For example, it may be any place that is within the field of view during shooting.
In the present invention, the designated position of the display surface of the display means can be changed and determined by operating the switches. When the switches provided on the gripping housing are operated, for example, each time the button is pressed, the display means The specified position changes, and when you press another button, the specified part is executed, or the menu selection of the screen display is performed with the top switch, and the confirmation to execute the menu is another button Indicates what to do by pressing.

Therefore, in the present invention, the treatment site in the oral cavity is imaged with the left hand while looking at the display unit, for example, when operating the imaging mode, the selected region of the display unit is changed while pressing the button with the left finger, By pressing another button or pressing the same button continuously, the selection can be confirmed and the shooting menu can be executed.
In addition, since this method uses a reflecting mirror, the mirror image is taken at an appropriate distance, so the focus of the shooting camera is always constant, and the image reflected on the mirror can be clearly captured. For this reason, dentists can perform accurate treatment, especially in caries on the back teeth, root canal treatment, abutment tooth formation, and implant placement.
During treatment, suitable imaging sites include inlay stepped parts, back teeth such as wisdom teeth (parent wisdom), endodontic conditions during root canal treatment, nerve positions in the teeth, etc. And still images can be displayed and recorded.
More specifically,
1. The portion of the small prosthesis, such as an inlay, which has been difficult to see until now, can be photographed and displayed in a moving image or a still image.
2. When forming a crown, it is possible to display a margin line portion that is difficult to see in the vicinity of the contact portion with the gingiva. Other prosthetic treatment status can be displayed.
3. It is possible to display with sufficient illumination and a clear image of the reflector up to the peripheral side of the wisdom tooth (parent wisdom) located in the back of the mouth. In particular, it can be used for imaging and treatment of an impacted tooth that is mostly hidden in the gingiva. In addition, the treatment status in the oral cavity can be displayed.
4). During root canal treatment, the state of the root canal from the hole opened in the tooth where the position state and nerve position were difficult to see can be photographed and displayed more clearly within the visible range.
5. An imaging display can be made as to whether or not all of the artificial bone root embedded in the jawbone is embedded in the jawbone.
It is possible to display places that are difficult to see, such as the back side of the teeth, and display in conjunction with treatment. It is possible to display the tartar throughout the periodontal and the degree after removal.
6). By displaying grid lines on the display unit, the distance between the implant and the adjacent tooth can be accurately determined.
7). The scale of the probe when measuring the periodontal pocket can be clearly observed, and the depth of the periodontal pocket can be measured.
8). Implant parallelism and vertical plantability can be evaluated from the grid display.
9. When drilling an implant placement hole in the jawbone, it is possible to form a vertical hole having a depth that is difficult to penetrate.
10. It is also possible to measure the vertical state of the drilled hole formed through the steps of implant implantation, the inclination and depth of the jig with the jig for measuring the inclination being inserted.
In the present invention, a convex spherical mirror can be used in addition to a plane mirror, and all the teeth of the upper and lower jaws can be photographed. However, in this case, the image is clear and includes an arrangement on the back side of the teeth. It can be displayed on a display body, and a therapeutic treatment can be used in combination with one-handed operation. Further, the present invention includes imaging of intraoral conditions, as well as performing imaging in conjunction with the above-described treatment or before and after the treatment.

The present invention displays a grid display superimposed on the monitor together with actual photographing data, and implants an implant planting hole in the jawbone according to the grid display, thereby implanting an implant closer to the vertical. Can be realized. In addition, it is possible to prevent the holes from being drilled too deeply by drilling the implant planting hole in a state where the grid display is superimposed on the image data displaying the scale displayed on the drill.
In addition, there is also a guideline setting means for displaying guideline data for the shape data that serves as a guide for sharpening the teeth and the abutment tooth shape data having the target inclination and size. By making it possible to display an image obtained by actually capturing an image in a transparent relationship, formation of an abutment tooth having a more accurate inclination and a margin line can be promoted.
Such a combination of guideline data setting means and superimposing means is that, in the practice of a dental intern, the guidance of the instructor is converted into guideline image data, and the shooting data and the guideline are transparently superimposed during or after the practice. By comparing, accurate and efficient dental lessons can be performed.
Further, by superimposing the grid lines on the imaging data, even a doctor who is somewhat inexperienced in skill can perform more accurate treatment by treating with the grid lines as a reference.

The present invention includes a photographing housing in which a light emitting element is arranged at the tip of the camera around a camera, and a gripping housing provided with switches at a site that can be operated with a fingertip around the gripping portion;
An intraoral imaging unit including a reflecting mirror arranged at a predetermined angle at the front end, and a mirror part provided with a hollow cylindrical part that can be attached to the gripping housing at the rear end, and an image captured by the imaging unit Is an intraoral imaging unit comprising a display unit disposed at a position that enters the operator's field of view, and allows selection of a display menu of the display unit with switches, etc. A clear image can be displayed even in the inner part. Furthermore, by performing operations such as selection of a display unit by operating switches with a fingertip, it is possible to image the intraoral site, which has been difficult until now, and to improve treatment efficiency.
Furthermore, by overlaying grid lines transparently on the imaging screen, it is possible to prevent an accurate hole from being formed in the jawbone or a hole having an excessive depth.
Also, create guideline images such as the inclination angle of the abutment tooth and the size of the margin line when creating the abutment tooth. When forming the abutment tooth, the captured abutment image and the guideline image should be transmitted. Accurate abutment teeth can be formed by superimposing them as a guideline for forming abutment teeth.

The figure for demonstrating the Example of this invention. The figure which shows the Example of this invention. The figure which shows the Example of this invention. The figure which shows the Example of this invention. The figure which shows the Example of this invention. The figure which shows the Example of this invention.

The present invention includes a photographing housing in which a light emitting element is arranged at the tip of the camera around a camera, and a gripping housing provided with switches at a site that can be operated with a fingertip around the gripping portion;
An intraoral imaging unit including a reflecting mirror arranged at a predetermined angle at the front end, and a mirror part provided with a hollow cylindrical part that can be attached to the gripping housing at the rear end, and an image captured by the imaging unit Is an intraoral imaging system comprising a display unit arranged at a position that enters the operator's field of view, and preferably has a combination configuration that enables selection of a display menu or the like of the display unit with switches. An example of a configuration in which the operation of the switches that can be operated with the fingertip enables the operation for selecting and confirming the selection menu in the display means.
That is, a configuration used as a so-called GUI (graphical user interface), which is a combination of the intraoral camera unit and the switches in the present invention and a graphically formed display screen for selection and determination, is preferable. The treatment based on the support of the display unit can be performed.

An embodiment of the present invention will be described in detail with reference to FIG.
The intraoral camera 100 shown in FIG. 1 (a) is inserted into the oral cavity with a hand-held pen-shaped gripping housing 101, a photographing unit 101b composed of a lens, a camera and illumination arranged in the longitudinal direction. Reflecting member 101a that reflects the illumination that is detachable from the illumination unit, irradiates it into the oral cavity, and further reflects the reflected light reflected on the oral tissue and transmits it to the imaging unit 101b. And formed.
Reference numerals 101d and 101e denote switches that have the same functions as the keys of the keyboard 105 and the mouse 106. That is, a screen display such as a menu displayed on the display 104 is selected by continuously pressing the switches 101d and 101e, and the operation is further performed to the switches similar to the double click, and is confirmed. Can be executed.

  The intraoral camera 100 is used by being connected to a general computer 102 such as a personal computer. A cable 103 is used for this connection, but as an example, a USB cable is used. Some intraoral cameras that are commercially available have a function of transferring image data to a computer by wireless communication. However, in addition to the operation of the camera, a large amount of power is consumed for lighting LED lighting and wireless data communication. Therefore, a battery and a charging mechanism for the battery are required, and there is a drawback that the camera as a whole becomes heavy and large. In the USB connection, the power of the camera can be supplied from the computer. Therefore, even if the weight of the cable 103 is taken into account, there is an advantage that the overall size can be reduced. Further, a display 104 is connected to the computer 102 so that an image actually taken by the intraoral camera can be viewed in real time, which can be used for explaining a patient. A keyboard 105 and a mouse 106 are also connected as information input devices, and are used for system operations.

Furthermore, the present invention may be combined with a monitor, a mobile personal computer, or a PAD type display member that performs portable display as shown in FIG.
In the present invention, the illumination member and the camera are integrated, preferably the camera is arranged at the center, and a position where 360 degrees around the periphery can irradiate sufficient illumination light to the oral cavity tissue via the reflector and the reflector. An imaging unit 101b having a configuration in which a plurality of illumination members are arranged (preferably a configuration in which four LEDs are arranged every 90 degrees around the camera) is arranged at the tip of the gripping housing 101, and the imaging unit is installed inside. An intraoral imaging unit combining a mirror part 101c with a reflecting member 101a arranged at a predetermined angle at the tip and an image connected to the rear end of the gripping housing 101 are output to the outside. A small computer equipped with a cable 107 and a portable display display, and preferably a switch operation by screen contact like a touch switch type The combination of the display body 108 capable of being exemplified.

A plurality of button-shaped, dial-shaped, and touch-panel type switches 101d and 101e are arranged at a portion of the gripping housing 101 that can be operated with a finger. , Switching between moving image shooting and still image shooting, the switches 101e are linked with software switches displayed on the display body 108, and the position of the selected switch changes each time the switch 101e is pressed. An example is shown in which a switch on the screen is confirmed and executed by pressing.
The switches 101d and 101e may have the same function as a switch of a keyboard or mouse computer connected to the computer.
Also, an intraoral camera using a reflector that has a configuration that irradiates illumination light uniformly, unlike a configuration in which the camera is inserted directly into the oral cavity, clearly displays the part where the back teeth cannot be seen. Therefore, it is possible to operate the switches 101d and 101e while holding the photographing unit with one hand while viewing the display body 108 even in the treatment of carious teeth, extraction of the back teeth, and the treatment of a portion where the gap is narrow. However, treatment with the other hand is possible.
The display body 108 can be attached to, for example, a treatment table, a treatment chair, and the like, and can be easily attached to an observable position enough to turn the neck during dental examination.

The display body 108 may be general-purpose and a cable to be connected may be a USB cable or the like.
In the embodiment of the present invention, these switches are operated with a finger of one hand.
Since the operation of these switches enables the operation of the display means and the operation of the photographing unit through the operation of the display means, even in the treatment of the part where the back teeth 10H cannot be seen or other difficult-to-view parts. The operation can be performed while viewing the display unit.
For example, it is possible to shoot parts that have been difficult to shoot with a camera until now, such as caries treatment of the back teeth, tooth extraction, wisdom tooth treatment, tooth extraction, periodontal treatment of the back teeth, implant treatment, etc. Can be linked to.
Note that the display 104 shown in FIG. 1A is also in a state where the user can easily enter the field of view when observing the oral cavity using the intraoral camera and interlocking with the treatment. It is preferable. Further, it is preferable that the display 104 and the display body 108 can realize a switch function only by touching as a touch switch system.

FIG. 2 illustrates and describes an intraoral camera unit portion which is a part of one embodiment of the present invention. 2 (a) and 2 (b), 201 is a gripping housing, which is formed of a plastic material, a metal material, etc., and is formed in an elongated rod shape so that it can be easily held. An electrical lead 204 for connection with an external monitor is connected.
Reference numeral 202 denotes a mirror portion in which a mirror surface portion 203 such as a plane mirror or a convex mirror is arranged at a predetermined angle (40 to 50 degrees with respect to the lens surface), and is a portion to be inserted into the oral cavity, and a reflecting mirror is formed at the tip. At the rear end, a cylindrical mounting portion 208 to which the photographing unit is detachably mounted is formed.
Reference numerals 207a and 207b denote operation switches, which form instructions such as power on / off and magnification change by pressing, rotation, rotation and pressing, etc., by a pressing method, a sliding method, a touch panel method, and the like. A plurality of operation switches are arranged as necessary, and mainly have a function to operate in conjunction with the display 104, the keyboard for operating the display 108 shown in FIG. 1, the switch of the mouse, etc. Alternatively, a combination of a main switch used for determining shooting and selection and a sub switch used mainly for switching states and options may be used.
2K2 shown in FIG. 2B is a photographing unit in which a camera is arranged at the center and one or more illumination units are arranged around the camera. The photographing unit 2K2 is directed toward the reflecting mirror 203 so as to be in focus. The distance is fixed at 2K1.
Therefore, since the reflected image can be clearly captured regardless of the distance from the reflector to the oral tissue, a clear image can be obtained as long as the optical path is secured even if the reflector is close to the oral tissue. Can shoot. Even if the light path is partially blocked by the tongue or the like, the illumination unit is uniformly arranged around the camera, so that it is a part of the mirror image, but can be obtained as a bright and clear image.

FIG. 2 (b) shows a side view of the imaging unit shown in FIG. 2 (a), and a suction unit for collecting excess saliva in the oral cavity, water injection during treatment, teeth that emerge during treatment, and prosthetic residue. It is also provided.
2B1 is a suction port, which is the tip of the flexible director 2B3. The position of the suction port 2B1 is an example, and for example, an arrangement like 2B2 is possible. The guide 2B3 is connected to an external suction device.
Since the position of the suction port 2B1 corresponds to the bottom portion of the photographed image, the treatment unit, saliva, and excess water can be suctioned by moving the camera unit while viewing the image on the display 104 or the display body 108 shown in FIG. In some cases, it may be preferable. The suction port 2B1 may be slightly protruded from the camera surface. The size and shape of the suction port 2B1 are selected depending on the target to be sucked, and for example, a circular shape, an elongated elliptical shape, a rectangular shape, and a shape along the peripheral edge of the reflecting mirror are shown.
The guide 2B3 may be mounted so as to crawl the side surfaces of the mirror unit 202 and the gripping housing 201, or may be integrally disposed inside or outside the mirror unit 202 and the gripping housing 201.
In addition, since the mirror part 202 is formed so that it can be attached to and detached from the gripping housing 201 in order to replace the mirror part 202 mainly inserted into the oral cavity, the guide may also be a connector or the like for the purpose of attachment / detachment. The connecting body 2B4 may be provided, and when the mirror unit 202 is replaced, the director 2B3 may be separated together at the position of the connecting body 2B4.
Note that the connection body 2B4 and its function, shape, arrangement position, etc. are arbitrary and may not exist.
The suction operation from the suction port 2B1 is preferably configured such that the display 104 shown in FIG. 1 or display on the screen of the display body 108 is started, stopped, and output strength is adjusted. The switches 207a and 207b are pressed and slid. By moving and rotating, for example, the display of the screen is selected and displayed like a tool bar that displays suction start, stop, and strength adjustment buttons. When the switch 207a is pressed or turned, for example, a button is displayed. It moves from the suction start where the color of the display is different from the others to the next stop button. When the switch button 207b is pressed at the timing when the target button color changes to a different color, it is confirmed. For example, when a button with a different button color is started to suck, the suction starts when the button is confirmed. An operation may be performed. Note that the suction configuration in FIG. 2B is an example, and the specific configuration and operation are appropriately adjusted.

FIG. 2 (c) is a diagram schematically showing the internal configuration of the intraoral camera shown in FIGS. 2 (a) and 2 (b).
In FIG. 2C, the mirror unit 202 is attached to the tip of the gripping housing 201, and the tip of the mirror unit 202 is formed to be inclined by 40 to 50 degrees with respect to the lens 205, and the mirror surface unit 203 is disposed here. As a result, an image of the intraoral tissue H to be imaged is formed on the image sensor inside the camera unit 206 connected to the lens 205. Since the camera unit 206 is arranged so that the direction of the mirror surface unit 203 is the front, the camera unit 206 is connected to the main board 209 with an inclination of 90 degrees. Image information acquired by the camera unit 206 is appropriately received and processed by the image processing microcomputer 210 on the main board 209 and transferred to a personal computer through an electric lead wire 204 such as a USB cable. The actual photographing operation is executed using the operation switches 207. In addition, the electrical energy which becomes the motive power of the intraoral camera is supplied from the personal computer via the USB cable electrical lead wire 204.

  The mirror portion 202 has a cylindrical structure at the base, and is mounted by inserting a mounting portion 208 disposed at the tip of the gripping housing 201. The reason why the mounting portion 208 is not integrated with the gripping housing 201 and is a different member is to reduce mechanical wear due to such a mounting method as much as possible. Specifically, the mounting portion 208 is made of a material such as polyacetal. This is because it is formed. On the other hand, the gripping housing 201 is usually cleaned with disinfecting alcohol, and chemical resistance is more important than wear resistance. Therefore, the gripping casing 201 is formed of a material such as polypropylene or has a chemical resistant surface. Coating is applied. In addition, since an imaging part is arrange | positioned inside the mounting part 208, the front end surface 211 of the mounting part 208 must be transparent, and is formed with resin, such as an acryl and a polycarbonate. The imaging unit also includes a light source substrate 212 disposed around the lens 205, and light emitted from the white light emitting diode on the substrate passes through the tip surface 211 and is reflected by the mirror surface unit 203 to be imaged (in the oral cavity). To the organization H). The front end surface 211 is not necessarily flat, and may have a hemispherical convex structure for collecting light from the light source. The size of the hemispherical structure is about 3 mm in diameter.

As already described, when only the mirror part 202 enters the oral cavity and has a structure that can be easily attached and detached, the mirror part 202 can be removed and sterilized by high-temperature steam so that it can be always used in a clean state. Is possible. Therefore, the material of the mirror part 202 is preferably formed of a resin that can withstand high temperature processing such as polysulfone. Since the mirror surface portion 203 is usually formed of glass, there is no problem with respect to heat resistance. As a method for connecting the mirror surface portion 203 to the mirror portion 202, it is difficult to use an adhesive because of heat resistance or biological safety. For example, as shown in FIG. A structure in which a tap structure is formed on the back surface and the silicon cover 214 is covered after being fixed to the mounting portion with screws 213 is used.
The position of the operation switches 207 arranged on the mirror unit 202 is easier to handle as much as possible in the front, but the front of the main substrate 209 requires an area for connection to the imaging unit and a configuration for processing. It is difficult to arrange the elements. Therefore, the switch board 215 is prepared separately, and the switch element 216 and the power-on confirmation LED 217 are arranged on the switch board 215. Then, the switch board 215 is incorporated into the gripper 202 to solve the problem of arrangement. In practice, the rubber cover 218 is covered on the upper portion of the switch element 216 to ensure waterproofness, and a member for the switches 207 is disposed thereon.
The switch board 215 is connected to the main board 209, and the state of the switch is transferred to the computer together with the image information. A direction sensor 219 is incorporated on the main board 209, and direction information of the intraoral camera is also transferred to the computer. When using a direction sensor 219 that can output three states, which are either facing or not facing each other, the two sensors are different from each other by 90 degrees. If it is arranged on the substrate, it can be determined whether the mirror surface part 203 is facing up, down, left, or right, and the orientation of the image displayed on the computer display can be appropriately rotated. Of course, if one sensor can determine these four directions independently, only one sensor may be arranged on the substrate.

FIG. 3 shows an enlarged view of the mirror unit 301.
Reference numeral 304 denotes a mounting portion, 305 denotes a reflecting mirror, and the reflecting mirror 305 is formed with a predetermined angle at the tip of a mirror support portion 303 made of a hard plastic material. The mounting portion 304 is formed in a cylindrical shape or an elliptical cylindrical shape at the rear end of the mirror support portion 303. The mounting portion 304 is open to the reflecting mirror 305, and the mounting portion 304 supports the reflecting mirror 305. It has a streamlined shape up to the part that has been made, and does not give a stimulus to the oral cavity. Reference numeral 306 denotes a gripping housing, and reference numeral 307 denotes a photographing unit. This is the same as 205 and 206 in FIG.
As described above, since the mirror unit 301 is detachable from the imaging unit 307, high temperature steam sterilization is possible and there are advantages in that the optical distance is long and focusing is easy. There is also an advantage that the mirror characteristics can be easily changed depending on the mode. For example, when the mirror 302 having a convex mirror 310 at the tip instead of a flat surface is used as the reflecting mirror 305, the intraoral tissue that is the subject of imaging is reflected in a wider range. In dentistry, an image showing the entire occlusal surface of the tooth and the entire front and side images are also extremely important. These images can be easily obtained by using a convex mirror.

A convex spherical reflector 310 has a curvature for photographing all teeth of the upper jaw or lower jaw, or a target row of teeth.
Note that such a convex and spherical reflecting mirror may be an example, and may be a concave mirror depending on the purpose.
FIG. 3B is a diagram illustrating an example of the photographing unit 307. Reference numeral 308 denotes a photographing unit, which is formed by a condenser lens, a CCD camera, or the like. An elliptical cylindrical body having a major axis in the vertical direction is exemplified, but it may be cylindrical.
Reference numeral 309 denotes an illumination unit, which is formed of an LED, a light emitting diode, or the like. The number of the illumination units 309 is, for example, four arranged in a cross shape, but is appropriately selected depending on the case where the tissue is illuminated via the reflecting mirror 305.

FIG. 4 is a diagram showing another embodiment of the present invention.
In FIG. 4A, reference numeral 2301 denotes a gripping housing, and a photographing unit 2301a in which a light source is disposed around the camera at the tip is disposed.
The gripping housing 2301 is formed with touch, switch, and switches 2301b and 2301c that are used for pressing, sliding, rotation and pressing. The number of switches is an example, and three or more switches may be formed.
2302 is provided with a reflecting mirror 2303 at the front end at an angle of 45 degrees, and the rear end is a mirror support portion formed of a hollow cylindrical body.
When the mirror support portion 2302 is detachably attached to the tip of the gripping housing 2301, the illumination of the imaging unit 2301a is reflected by the reflecting mirror 2303 to illuminate the inside of the oral cavity, and the illuminated intraoral area is reflected by the reflecting mirror 2303. A configuration is shown in which the photographing unit 2301a captures a camera image in a moving image or still image state. Reference numeral 2301d denotes a general-purpose or dedicated electric lead wire such as a USB cable for connecting to an external signal processing unit and a display unit.
The block diagrams after 2304 are signal processing units formed in software or hardware by an image processing computer or the like.
Reference numeral 2304 denotes input means for inputting the image data as an electric signal of moving image data or still image data. In addition, when the object to be imaged is only a reflector, an operation for extracting a contour region of only a reflector image may be performed.
Reference numeral 2305 denotes distortion correction means, which corrects distortion for photographing the intraoral area with the reflector having a predetermined angle. This indicates that, for example, the degree of distortion when a reference graphic is captured in advance is measured, and this is converted into a coefficient to calculate image data.
Reference numeral 2306 denotes photographing distance setting means, for example, means for presetting the value of photographing distance a (distance from the tooth surface to the tip of the reflecting mirror) shown in FIG.
This is set as a = 0 mm, 3 mm, etc., and is selected and designated by the user as a guide on the computer monitor. In this case, the switches 2301b and 2301c are displayed while looking at the display 104 or the display body 108 with a fingertip, and a plurality of a-value button displays are designated by moving, pressing, sliding, pulling, turning, etc., and other switches The a value is determined by, for example, operating.

Reference numeral 2307 denotes grid forming means for forming a grid-like grid display 2312a shown in FIG. 4B based on the value of the distance a or an arbitrary value. The grid display 2312a may be arbitrarily set with respect to the captured image 2312b when displaying the relative interval, size, verticality, and parallelism. In addition, the imaging distance setting means 2306 may perform grid display with an interval in the distance on the actual oral cavity surface based on the value of the imaging distance a.
In that case, it is preferable that 2312c which shows a base part becomes a position of a reflector front-end | tip part. This grid display may be limited to the reflecting surface of the reflecting mirror 2303, that is, the circular shape.
Reference numeral 2308 denotes superimposing means, which transparently superimposes the mirror image output from the distortion correcting means 2305 and the grid diagram output from the grid forming means 2307 (transmission is both as shown in the figure). This is a part for displaying on the display. In addition to the superposition method using a mouse by general-purpose graphic software, it is preferable to perform the selection operation and the superposition operation by operating the switches 2301b and 2301c without using the mouse. is there.
Reference numeral 2309 denotes a display means, which is exemplified by a display screen such as a desktop or notebook personal computer monitor display, PDA, or mobile phone.
Reference numeral 2310 denotes distortion adding means, which is a means for forming and displaying a distorted grid by adding distortion of the screen display actually reflected by the reflecting mirror to the grid display formed by the grid forming means 2307.
The distortion adding unit 2310 may be suitable when, for example, when the shooting unit performs shooting in the moving image mode, the delay time due to the increase in calculation time when the distortion correcting unit 2305 is used is eliminated and the grid display is performed in the moving image mode. . This is suitable for the treatment of sites that are difficult to treat conventionally, such as the back teeth, with the imaging unit in one hand, the treatment tool in the other hand, and viewing the display means 2309.
FIG. 4B is an example of a display screen 2312 in which image data photographed by the photographing unit 2301a is displayed on a computer display. FIG. 4C is a diagram illustrating a state in which an image photographed by the photographing unit 2301a is left without being subjected to distortion correction, and is superimposed with distortion applied to grid lines.
2311d is unit data when an actual distance value is given to the grid. The vertical unit is indicated by k and the horizontal unit is indicated by l. The block diagram shown in FIG. 4 can be realized by a combination of electric circuits, but is preferably realized by software in view of using computer processing as shown in FIG. The same applies to the block diagram shown in FIG.

Next, the operation of the embodiment shown in FIG. 4 will be described.
The holding housing 2301 is held, and the reflecting mirror 2303 at the tip of the mirror support 2302 is arranged with a predetermined distance a that is fastened to the observation / treatment tooth 23H by 23A. The illuminating unit 309 made up of, for example, four light emitting elements shown in FIG. 3 of the imaging unit 2302a emits light toward the reflecting mirror 2303 and is reflected at an angle of, for example, 90 degrees to illuminate the observation / treatment tooth 23H.
The imaging unit 308 shown in FIG. 3 of the imaging unit 2302a transmits the image of the illuminated observation / treatment tooth 23H as a moving image or a still image as an image signal to the input unit 2304 via an electrical lead wire 2301d such as a USB cable. Entered. The operator sets the distance between the reflecting mirror 2303 and the observation / treatment tooth 23H using the photographing distance setting means 2306 and selectively inputs the value a. This selection input is performed by displaying buttons of a distance, 0 mm, 2 mm, and 5 mm in a tool bar shape on the screen of the display unit 2309 in advance, for example, by pressing, sliding, or turning the switches 2301c. Alternatively, the button color display may be moved, and then a switch 2301b may be pressed to determine a button having a different color, and a GUI designation input may be performed to determine and input the distance.
The image input to the input unit 2304 is subjected to distortion correction by the distortion correction unit 2305 and input to the overlay unit 2308. When the shooting distance is set by the shooting distance setting means 2306, the signal is input to the grid forming means 2307, the unit distance of 2311d showing the unit grid diagram shown in FIG. Is set, and a grid display 2312a based on the distance is output to the superimposing means 2308.
The superimposing means 2308 forms superimposition data obtained by superimposing the input image 2312b taken by the reflecting mirror after distortion correction and the grid display 2312a, and displays them on the display means 2309. This state is shown in FIG.

Further, when displaying a moving image, the grid forming unit 2307 adds distortion in a form corresponding to the image reflected by the reflecting mirror 2303 by the distortion adding unit 2310 and the input unit 2304. The mirror image output in step S1 is input to the superimposing unit 2308 without being subjected to distortion correction by the distortion correcting unit 2305. The display may be superimposed and displayed on the display means 2309. This state is shown in FIG.
A distorted grid 2311a and a reflector image 2311b are superimposed and displayed in a window-like display 2311 displayed on a computer monitor.
A portion 2311c is a tip portion of the reflecting mirror 2303, and is a portion serving as a reference for the distance.
2311d is a scale display of the grid display set based on the distance a. 2311d may be unnecessary in the case of relative display. Note that the scale display 2311d displayed only in FIG. 3C is also displayed in FIG.
In this embodiment, both treatments can be used, and even the reflecting mirror 2303 close to the tooth can obtain a clear image from the reflecting mirror. By setting a scale display and a grid display on this, It is possible to measure the state of the tooth, the degree of damage, the size, the reference depth, and the like, and it is also possible to perform treatment while performing operations such as turning on and off the grid display with the switches 2301b and 2301c.

Another embodiment will be described in detail with reference to FIG.
In FIG. 5, reference numeral 2401 denotes an operation unit, which includes, for example, the photographing unit shown in FIGS. 1A and 1B, and a monitor screen selection operation is performed by operating switches attached to the photographing unit. Are preferably used.
Reference numeral 2402 denotes distortion correction means that corrects distortion for photographing the inside of the oral cavity with the reflector having a predetermined angle. This indicates that, for example, the degree of distortion when a reference graphic is captured in advance is measured, and this is converted into a coefficient to calculate image data.
Reference numeral 2403 denotes a superimposing unit that superimposes and transmits two images, and has a function of adjusting the size and angle of the two input images in order to perform matching superimposition. In addition.
Reference numeral 2404 denotes guideline data forming means, for example, for forming an index image for setting the inclination of the side surface of the abutment tooth and the size of the abutment tooth when forming the abutment tooth to be created. It is drawn by a drawing function by so-called graphic software.
Reference numeral 2405 denotes display means, which is exemplified by display screens such as desktop and notebook personal computer monitor displays, PDAs, and mobile phones.

The operation of the present embodiment will be described in detail with reference to FIG.
Captured image data 2406 shown in FIG.
The photographed image data 2406 is obtained by photographing the abutment tooth 2406a from the side surface, and 2406b is an adjacent tooth.
A guideline image 2407 indicating an index 2408 indicating the inclination of the abutment tooth is created in advance as shown in FIG. The guideline image 2407 forms a plurality of types of images in which the angles of the inclined portions of the abutment teeth are different as shown by c-1 and c-2 in FIG. For example, it is preferable to store ready-made data or data created by itself in a computer that executes this embodiment and store displayable image data.
FIG. 5 (c) c-3 is an index image when the abutment tooth is viewed from the upper surface direction, 2412 indicates an index margin line, and 2413 indicates the index top. It is preferable that a plurality of types of index images shown in c-3 are prepared for each tooth type.
Next, FIG. 5D is a superimposed image 2409 when the captured image 2405 of the inclined surface of the abutment tooth and the index image 2107 are superimposed. The superimposing unit 2403 performs distortion with the distortion correcting unit 2402. The corrected abutment tooth image, the captured image data 2406 formed by the guideline data forming unit 2404, and the index 2408 formed by the guideline data forming unit 2404 are overlapped in a transparent state and displayed on the display unit 2405. It is a thing.
FIG. 5E shows an index image indicated by an index margin line 2412 and an index apex 2413, an imaged margin line 2411, and an imaged apex 2414 when the abutment is imaged from above. An image 2410 is obtained by superimposing captured images.
These superimposed image data become intermediate evaluation and final evaluation at the time of the preparation of the abutment tooth, and enable accurate treatment based on the guideline image data.

FIG. 7 shows an example of a state in which an image is displayed on the display body 180P when the configuration shown in FIG. 1B is used.
Reference numeral 2501 denotes a gripping housing, in which a photographing unit 2501a in which an illumination light source 2501c is arranged in a cross direction with the camera 2501b as a center is arranged at the tip. Jog dial-like switches 2508 that can be pressed are installed. Reference numeral 2501d denotes a general-purpose cable such as a USB cable or an electric cable such as a dedicated cable.
Furthermore, the part of the mirror part 2502 attached to the elliptical columnar imaging unit 2501a at the tip of the gripping housing 2501 forms an elliptic cylinder, and a reflecting mirror 2503 is arranged at an angle of 45 degrees at the tip. ing.
On the screen 180G of the display body 180P, 1801 shows a dental treatment menu screen, and it may be preferable that the display changes every time the stage shifts.
Reference numeral 1802 denotes a case selection list. By specifying such as clicking on this part along with the display of caries, missing teeth, etc., moving image display, still image display, etc. are executed. May be preferred.

Reference numeral 1803 is a schematic diagram of a dentition, in which parts are shown vertically and tooth numbers are shown inside. Reference numeral 1804 denotes a treatment mark indicating a target site. In some cases, this mark is preferably displayed with a noticeable color, symbol, or the like.
Reference numeral 1805 denotes a treated mark indicating a past treatment site, and is preferably a color, a symbol, or other display that is distinguished from the treatment mark 1804.
Reference numeral 1806 denotes an image display unit when a target part is imaged by the intraoral camera 2500, and based on this display, the above-described dental formula 1813 can be designated at hand.
Reference numeral 1807 denotes a simulation table, which is displayed at a corresponding location every time it is designated.

In the present embodiment, an embodiment in which a tooth type is selected at hand using, for example, an intraoral camera shown in FIG.
For example, the reflecting mirror 2403 of the intraoral camera 2500 is brought close to the measurement tooth SG.
In this state, when the switches 2408 are turned or pressed, the case selection changes as 1802a → 1802b → 1802c → 1802d → 1802e so that the color changes, and the switches 2408 are pressed and confirmed in the selected case. When confirmed, the case is displayed in the simulation table 1807 and the process proceeds to the next dental expression display unit 1803.
When the measurement tooth SG is photographing the left mandible 6, if the button of the switches 2408 is turned with a finger, the display of the tooth type or the treatment mark moves, for example, 8 → 7 → sequentially from the upper left each time it is turned or pressed. The dentist pushes the switches 2407 on the near side until the teeth match, and when the display mark reaches the target part (here, the lower jaw right 6), presses it. Stop or press switch 2407 or switches 2408 to confirm.
As described above, hold the intraoral camera 2500 with one hand, hold the treatment tool with the other hand, and look at the display unit 180P, and it is difficult to see and treat the intraoral site with limited space. Is possible.

  The present invention makes it possible to display the back teeth and the parts that have been difficult to observe by using an imaging means using a reflecting mirror, and further superimpose grid lines and guideline images on the captured image. Since the display operation can be performed, various procedures such as prosthesis of minute prosthesis, treatment of back teeth such as wisdom teeth, stable and accurate implantation of implants, accurate formation of abutment teeth, accurate root canal treatment, etc. It is effectively used in various dental treatment fields.

DESCRIPTION OF SYMBOLS 100 Oral camera 101 Grasping housing | casing 101a Reflective member 101b Imaging | photography unit 101c Mirror part 101d Switches 101e Switches 102 Computer 103 Cable 104 Display 105 Keyboard 106 Mouse

Claims (5)

A housing that can be held and held with a photographing unit that combines an illumination member and a photographing member at the tip, an intraoral photographing unit that includes switches disposed in a part that can be operated with a finger when the housing is gripped, treatment An intraoral imaging display system comprising index data setting means for setting a grid display corresponding to evaluation, and display means for displaying the grid display and an intraoral image captured by the intraoral imaging unit in an overlapping manner. A housing that can be held and held with a photographing unit that combines an illumination member and a photographing member at the tip, an intraoral photographing unit that includes switches disposed in a part that can be operated with a finger when the housing is gripped, treatment An intraoral radiographing display system comprising index data setting means for setting guideline data corresponding to evaluation, and display means for superimposing and displaying the guideline data and intraoral images taken by the intraoral radiographing unit.   Mounted detachably on the housing, and at the time of mounting, a mirror surface portion that reflects the illumination light of the illumination member to irradiate the living body and transmits the illuminated tissue surface to the imaging member is disposed at a predetermined angle. The reflection member has an attachment portion for detachably attaching to the housing at one end, the reflection member is connected to the other end, and both ends are long enough that only the reflection member enters the oral cavity. The intraoral radiography display system according to claim 1, further comprising a reflecting portion support member that is connected to the outer periphery and has an open shape except for the connected portion. The guideline data is image data displaying a step formed for a prosthesis of a microprosthesis such as an inlay or the like, or a state of the oral cavity before and after the treatment of a margin prosthesis when a crown prosthesis is mounted. Item 3. The intraoral imaging display system according to Item 2. The intraoral radiographing display according to claim 4, wherein the guideline data is image data displaying parallelism, perpendicularity, perpendicularity of the jawbone drilling hole, depth, and implant implantation status before and after implant implantation. system.

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