JP2009133918A - System for evaluating intraoral radiography practice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new system for evaluating intraoral radiography practice wherein intraoral radiography practice can be rapidly and accurately evaluated with a simple configuration and without performing X-ray irradiation. <P>SOLUTION: The system for evaluating intraoral radiography practice includes: a dental cast 1 so configured that tissues 3 around the teeth can be attached and detached while the row of teeth is being fixed; a film simulation plate 6 simulating the shape of an intraoral X-ray film; a holding means 7 for holding the film simulation plate 6; a cone simulation cylinder 9 simulating the shape of an X-ray irradiation indicator cone; a photographing means 10 for photographing an area corresponding to an X-ray irradiation field through the cone simulation cylinder 9; and a display means 13 for displaying the image photographed by the photographing means 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intraoral X-ray imaging training evaluation system used for learning techniques of intraoral X-ray imaging in the field of dental medicine education.

  In oral X-ray photography in dentistry, you must acquire a technique called bisection. However, this technique is difficult to learn and generally requires a training period of about half a year to learn.

  The reason why it is difficult to learn this technique is to set the rooting direction, angle, and range based on the crown part where the appearance appears in order to photograph the root part where the appearance does not appear. This is because this assumption requires some experience. It is also necessary to irradiate X-rays perpendicular to the bisector of the angle formed between the assumed tooth axis and the film surface inserted into the mouth, assuming the tooth axis that is the axis connecting the crown part and the root part. This is because a certain amount of experience is required to determine the film insertion position and the irradiation angle at this time.

  Conventional practice of intraoral X-ray photography was performed by actually irradiating and photographing X-rays using a model for photography practice and evaluating the results. Therefore, a radiographing room and a developing device dedicated to X-ray photography are necessary, and there is a problem that the practical place is limited. Further, since it takes about 5 minutes to develop the film, there is a problem that it takes time to feed back the photographing result to the trainee.

Therefore, in order to solve such problems, for example, an X-ray image is simulated from information on the film insertion position and the irradiation angle using an image obtained by photographing a model for photographing training with multi-slice CT. The system which does is disclosed (nonpatent literature 1).
Takuyasu Tokuyasu, Genji Yamamoto, Kazutoshi Okamura, Kazuyoshi Yoshiura: Development of a dental intraoral radiography training system -Evaluation on X-ray image generation simulation-. Dental Biomedical Engineering. 43 (4): 560-567, 2005.

  However, in this system, in order to simulate an X-ray image, it is necessary to photograph a model for photographing training in advance by multi-slice CT, a means for measuring the position of the film, the angle of irradiation, and this measurement data. The system configuration is complicated, such as the need for a dedicated computer program for calculating and simulating the image, and there is a problem that measurement and calculation errors are inevitably caused, resulting in lack of accuracy. was there.

  In addition, this system can handle information such as film position and angle, but it is not assumed that the film is curved. It is extremely difficult in practice. Therefore, when the film is curved, the information cannot be fed back to the practitioner, and there is a problem that the practicum cannot be evaluated accurately.

  The present invention provides a novel intraoral X-ray radiography training evaluation system that solves the above-described problems and enables quick and accurate evaluation of intraoral X-ray radiography training with a simple configuration without performing X-ray irradiation. For the purpose.

  The intraoral X-ray radiography training evaluation system of the present invention includes a dental model in which a tissue around a tooth is detachable with a dentition fixed, a film simulation plate simulating the shape of an oral X-ray imaging film, A holding means for holding the simulated film plate, a cone simulation cylinder simulating the shape of the X-ray irradiation instruction cone, an imaging means for imaging an area corresponding to an X-ray irradiation field through the cone simulation cylinder, and the imaging means And a display means for displaying the photographed image.

  The tissue around the teeth of the dental model is formed of silicon resin.

  Further, the photographing means is a single-focus web camera.

  According to the intraoral X-ray imaging training evaluation system of the present invention, assuming an actual X-ray imaging, the apprentice fixes the film simulation board in the mouth of the dental model with the tissue around the teeth attached, By fixing the cone simulation cylinder toward the dental model and then detaching the tissue around the teeth of the dental model, the appearance of the projection of the teeth on the simulated film plate by the practitioner is taken by the imaging means. Is displayed on the display means as an image photographed in (1). Therefore, it is possible to quickly and accurately evaluate the intraoral X-ray imaging training with a simple configuration without performing X-ray irradiation.

  Further, the tissue around the teeth of the dental model is formed of silicon resin and can be easily attached and detached.

  Furthermore, the photographing means is a single-focus web camera, the range of the visual field is constant, and the distortion of the projected image on the tooth film simulated plate that the practitioner tried to photograph using a simple computer program, Distortion can be easily corrected and an accurate image can be obtained.

  Hereinafter, embodiments of the intraoral X-ray imaging training evaluation system of the present invention will be described in detail with reference to the accompanying drawings.

  In FIGS. 1 to 5 showing the intraoral X-ray imaging training evaluation system of the present embodiment, 1 is a dental model, and the dental model 1 is composed of a tooth 2 with a fixed dentition and a tissue 3 around the tooth. . The tissue 3 around the teeth is formed of a soft silicone resin, and the tissue 3 around the teeth is configured to be detachable with the tooth row fixed. In addition, the raw material used in order to form the structure | tissue 3 around a tooth | gear is not restricted to a soft silicone resin, Arbitrary elastic substances which have the softness | strength which can be attached or detached to the tooth | gear 2 can be used. Further, the tissue 3 around the teeth is divided into a plurality of parts, and each part is configured to be detachable independently. Furthermore, the teeth 2 are supported by a support means 5 such as a tripod via a fixing means 4 such as a metal wire.

  Reference numeral 6 denotes a film simulation plate. The film simulation plate 6 simulates the shape of a film for intraoral X-ray photography. The film simulation plate 6 is held by holding means 7 such as an arbitrarily deformable metal wire, and the holding means 7 is supported by a support means 8 such as a tripod. And the film simulation board 6 can be fixed to arbitrary positions by changing the fixing means 7. FIG.

  Reference numeral 9 denotes a cone simulation cylinder, and the cone simulation cylinder 9 simulates the shape of an X-ray irradiation instruction cone attached to the X-ray irradiation apparatus. The cone simulation cylinder 9 is attached to the imaging means 10, and the imaging means 10 images an area corresponding to an X-ray irradiation field through the cone simulation cylinder 9. The photographing means 10 is a single-focus web camera, and is configured to be able to transmit photographed image data to a computer network. Reference numeral 11 denotes the focal point of the lens of the photographing means 10. The photographing means 10 is supported by a support means 12 such as a tripod.

  A display means 13 is connected to a computer network. The display means 13 receives the image data taken by the photographing means 10 via the computer network, and displays the image. The display means 13 is composed of a computer display device.

  Next, the operation will be described.

  First, as shown in the left side of FIG. 2 and FIG. 3, assuming an actual X-ray image, the trainee fixes the film simulation plate 6 in the mouth of the dental model 1 with the tissue 3 around the teeth attached. To do. Then, assuming actual X-ray photography, the trainee fixes the cone simulation cylinder 9 toward the dental model 1. An example of the image displayed on the display means 13 at that time is shown in FIG.

  After that, as shown on the right side of FIG. 2, the tissue 3 around the teeth of the dental model 1 is detached to make only the teeth 2. Then, the projection of the crown and tooth root of the tooth 2 to be photographed by the apprentice onto the film simulation board 6 is displayed on the display means 13 as an image photographed by the photographing means 10. An example of the image displayed on the display means 13 at that time is shown in FIG.

  The image obtained when the tissue 3 around the teeth of the dental model 1 is detached corresponds to an image drawn on the film at the time of X-ray photography, and the practical result is evaluated by checking this image. be able to. That is, instead of irradiating X-rays with an X-ray irradiation apparatus, the practical results of intraoral X-ray imaging can be evaluated by taking an image with an imaging means installed at the position of the X-ray irradiation apparatus. Moreover, since the evaluation result of the training can be fed back to the trainee in a short time, the training efficiency can be improved.

  In addition, when the practitioner bends the film simulation plate 6 fixed in the mouth of the dental model 1, in the actual X-ray photography, the projection image of the teeth on the film is distorted and the photographing fails. . In this case, according to the intraoral X-ray imaging training evaluation system of this embodiment, whether or not the film simulation board 6 is curved can be determined instantaneously by simply checking the image, and a simple computer program is used. Then, based on the image when the tissue 3 around the teeth of the dental model 1 is detached, an image when the curved film simulation plate 6 is made flat, that is, an image on the film obtained by actual X-ray photography. It is possible to easily obtain an image corresponding to. Further, in addition to the processing for the curvature of the film simulation plate 6, processing for correcting barrel distortion caused by the lens of the photographing means 10 can be easily performed.

  As described above, the intraoral X-ray imaging training evaluation system of the present embodiment includes the dental model 1 in which the tissue 3 around the teeth is detachable while the dentition is fixed, and the oral X-ray imaging film. Corresponding to an X-ray irradiation field through a simulated film 6 that simulates the shape, a holding means 7 that holds the simulated film 6, a simulated cone 9 that simulates the shape of an X-ray irradiation instruction cone, and the simulated cone 9 The imaging means 10 for imaging the area to be imaged, and the display means 13 for displaying the image captured by the imaging means 10, assuming that the actual X-ray imaging, the practitioner, the tissue around the teeth The film simulation plate 6 is fixed in the mouth of the dental model 1 with the 3 attached, and the cone simulation cylinder 9 is fixed toward the dental model 1, and then the tissue 3 around the teeth of the dental model 1. By disengaging, training person how the projection of the film simulated board 6 will with tooth 2 be photographed is displayed on the display unit 13 as a captured image by capturing unit 10.

  Therefore, it is possible to quickly and accurately evaluate the intraoral X-ray imaging training with a simple configuration without performing X-ray irradiation. In addition, since there is no need to use X-rays, practical training and evaluation are possible regardless of the location.

  The tissue 3 around the teeth of the dental model 1 is made of silicon resin and can be easily attached and detached.

  Further, since the photographing means 10 is a single-focus web camera, the range of the field of view is constant, and the tooth 2 to be photographed by the practitioner using a simple computer program is placed on the film simulation board 6. The distortion and distortion of the projected image can be easily corrected, and an accurate image can be obtained. In addition, since the photographing means 10 is a web camera, it is possible to simultaneously display a plurality of training images on one display means 13, which can improve the efficiency of training and evaluation, It can also be applied to remote X-ray photography learning systems and common tests.

  In addition, this invention is not limited by said Example, A various deformation | transformation implementation is possible.

It is a schematic diagram which shows the outline | summary of the intraoral method X-ray imaging | photography training evaluation system of Example 1 of this invention. It is a schematic diagram which shows a use condition same as the above. It is a perspective view of the dental model vicinity which shows a use condition same as the above. It is an example of the image of the dental model of the state which mounted | wore the structure | tissue around the tooth | gear image | photographed by the imaging | photography means same as the above. It is an example of the image of the dental model in the state where the tissue around the teeth photographed by the photographing means is removed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dental model 3 The structure | tissue around a tooth | gear 6 Film simulation board 7 Holding means 9 Cone simulation cylinder
10 Shooting means
13 Display means

Claims (3)

A dental model in which the tissue around the teeth is detachable with the dentition fixed, a film simulation plate simulating the shape of a film for intraoral X-ray photography, and a holding means for holding the film simulation plate, A cone simulation cylinder simulating the shape of an X-ray irradiation instruction cone, an imaging means for imaging an area corresponding to an X-ray irradiation field through the cone simulation cylinder, and a display means for displaying an image captured by the imaging means Intraoral X-ray photography training evaluation system. The intraoral X-ray imaging training evaluation system according to claim 1, wherein the tissue around the teeth of the dental model is formed of silicon resin. The intraoral X-ray imaging training evaluation system according to claim 1, wherein the imaging unit is a single-focus web camera.

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