JPH08280669A - X-ray image detector for dentistry - Google Patents

Abstract

PURPOSE: To provide an X-ray image detector for dentistry with good operatability by which X-ray photographing of teeth can be performed without providing unpleasant feeling to a patient. CONSTITUTION: A sensor cable 3 can be smoothly pulled out of the oral cavity when an X-ray image of teeth is photographed in such a way that the sensor cable 3 can be pulled out from the end part corner in the longitudinal direction of a sensor case 2 enveloping an X-ray detecting element 1 in the slanting backward direction to the X-ray irradiating direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental X-ray image detector used in X-ray photography performed in a dental clinic or dental clinic.

[0002]

2. Description of the Related Art Conventionally, as a dental X-ray image detector of this kind, one having a structure shown in FIG. 7 or 8 is known. (For example, Japanese Patent Laid-Open No. 5-13090)
7 is of a type in which the sensor cable 13a is pulled out in the direction perpendicular to the X-ray irradiation direction indicated by the arrow from the longitudinal end face of the sensor case 12 containing the X-ray detection element 11 shown by the dotted line. On the other hand, FIG. 8 shows a type in which the sensor cable 13b is pulled out from the back surface of the sensor case 12 in parallel with the X-ray irradiation direction. The X-ray irradiation image of each tooth located on the entire surface of the detector is detected as an image by the X-ray detection element, and an electric signal is taken out through the sensor cable 13a or 13b.

[0003]

However, in the structure of the above-mentioned conventional dental X-ray image detector, the sensor cable is X-shaped.
Since it is pulled out in the lateral direction perpendicular to the radiation direction or on the back of the detector, if the detector is brought into contact with the dentition during X-ray photography, the sensor cable will move horizontally as shown in Fig. 9. When it is pulled out in the direction, it will directly hit the dentition, and when it is pulled out in the back direction, it will be pushed out into the back of the throat, which easily induces a vomiting feeling in the patient. It was an obstacle to shooting.

Further, since the sensor case has a simple rectangular parallelepiped shape and the X-ray irradiation surface is also a flat surface, the detector should be fixed in a stable state when abutting against a curved row of teeth for photographing. However, there is a problem that the captured image is easily blurred.

The present invention solves the above problems by providing a dental X-ray image detector in which the sensor cable does not get in the way when X-ray imaging is performed, the burden on the patient is small, and the imaging is easy. When fixing the detector by abutting against the dentition,
The purpose is to stabilize the detector and to make it easy to hold with a finger.

[0006]

In order to achieve this object, a first means of the present invention is to use a sensor cable for extracting an input / output signal of an X-ray detecting element from an X-ray corner from a longitudinal end corner of a sensor case. It is configured to be pulled out obliquely rearward with respect to the irradiation direction.

Further, the second means of the present invention is that the tooth row contact surface of the sensor case is constituted by a curved surface convex toward the outside of the sensor case.

Further, according to a third aspect of the present invention, the back surface of the sensor case with respect to the X-ray irradiation side has a plate-like X-shape which is included therein.
The configuration is such that it has an inclination with respect to the back surface of the line detection element.

A fourth means of the present invention is that the sensor case is made of a resin material having elasticity.

[0010]

With the above-mentioned first means, when the detector is brought into contact with the dentition for X-ray imaging, the sensor cable does not hinder the imaging, and the patient does not feel uncomfortable.

Further, by the second means, when the detector is fixed in the oral cavity, the surface of the sensor case can easily follow the inside of the dentition where the surface is curved, and the detector can be fixed stably. It is possible to prevent image blurring during X-ray photography.

Further, by the third means, the detector can be firmly brought into close contact with the oral cavity by using the finger, and clear X-ray photography can be performed.

By the fourth means, the detector can be more stably fixed, the foreign body sensation in the oral cavity can be reduced even for the patient, and the X-ray imaging with less discomfort can be achieved. Is what makes it possible.

[0014]

Embodiments of the dental X-ray image detector of the present invention will be described below with reference to the drawings.

FIG. 1 shows a dental X according to a first embodiment of the present invention.
1 shows an X-ray detection element for detecting an X-ray irradiation image of a tooth, which is a sensor unit 1a composed of a CCD or the like, a base unit 1b for fixing the sensor unit 1a, and X. Shield plate 1 for blocking ambient light other than lines
It is composed of c. Reference numeral 2 is a sensor case containing the X-ray detection element 1, and reference numeral 3 is a sensor cable for extracting an input / output signal of the X-ray detection element 1 to the outside of the sensor case 2.

Next, the operation of this dental X-ray image detector will be described with reference to FIG. FIG. 2 shows an example in which the dental X-ray image detector according to the first embodiment of the present invention is brought into contact with the dentition in the oral cavity, and the X-rays emitted from the direction shown by the arrow in the drawing are shown. After passing through the tooth example and the sensor case 2, the X-ray irradiation image of the tooth is detected as an electric signal by the X-ray detection element 1. The image signal detected by the X-ray detection element 1 is guided by the sensor cable 3 to an extraoral controller (not shown).

At this time, the sensor cable 3 is
The sensor case 2 can be smoothly pulled out obliquely rearward with respect to the X-ray irradiation direction along the curve of the dentition from the end corners of the sensor case 2 without causing discomfort to the patient and obstructing the imaging. It does not happen.

FIG. 3 is a dental X of the second embodiment of the present invention.
2A shows a cross-sectional structure of a line image detector. Reference numeral 2a denotes a contact surface of a sensor case 2 formed of a convex curved surface with respect to a tooth row. As shown in a usage example of FIG. When the X-ray image detector is fixed with a finger, the convex curved surface 2a of the sensor case 2 fits smoothly to the curved surface of the dentition, and stable X-ray imaging can be performed.

FIG. 5 shows a cross-sectional structure of a dental X-ray image detector according to the third embodiment of the present invention. 2b is a back surface of the sensor case 2 with respect to the X-ray irradiation side, and contains X.
The line detection element 1 has a shape inclined with respect to the back surface thereof. With this shape, as shown in FIG. 6, when the dental X-ray image detector is fixed in the oral cavity, it is possible to comfortably apply force to the fingertip pressing it, so that it can be closely attached to the dentition. A clear X that can be firmly fixed
This makes it possible to take a line image.

A fourth embodiment of the present invention (not shown)
The various shapes of the sensor case 2 are made of a synthetic resin material having elasticity so that when the dental X-ray image detector is fixed in the oral cavity with a fingertip, it has elasticity on the inner wall surface of the oral cavity. The soft contact makes it possible to significantly reduce the feeling of foreign matter given to the patient.

[0021]

As is apparent from the above description, the dental X-ray image detector of the present invention has a shape in which the sensor cable is pulled out obliquely rearward with respect to the X-ray irradiation direction,
Since the sensor cable does not hit the dentition at the time of X-ray photography, and it does not protrude into the back of the throat and induces the vomiting feeling of the patient, it can be pulled out smoothly out of the oral cavity along the curvature of the dentition. X-ray imaging can be performed comfortably without giving discomfort to the patient.

Further, since the contact surface of the sensor case to the dentition is a convex curved surface along the curvature of the dentition, the detector can be stably fixed in the oral cavity, and at the time of X-ray photography. It is possible to prevent blurring of the image.

Further, since the sensor case is provided with an inclination on the back surface, when the detector is fixed in the oral cavity with a finger, force is easily applied to the fingertip and the detector can be firmly attached to the dentition, so that a clear X Line images can be taken.

Further, since the sensor case is made of the elastic synthetic resin material, the foreign body sensation in the oral cavity can be significantly reduced, and comfortable X-ray imaging with less discomfort to the patient can be performed.

[Brief description of drawings]

FIG. 1 is a side sectional view of a dental X-ray image detector according to a first embodiment of the present invention.

FIG. 2 is an explanatory view of a usage state of the first embodiment.

FIG. 3 is a side sectional view of a dental X-ray image detector according to a second embodiment of the present invention.

FIG. 4 is an explanatory view of a usage state of the second embodiment.

FIG. 5 is a side sectional view of a dental X-ray image detector according to a third embodiment of the present invention.

FIG. 6 is an explanatory view of a usage state of the third embodiment.

FIG. 7 is a perspective view showing an example of a conventional dental X-ray image detector.

FIG. 8 is a perspective view showing another example of a conventional dental X-ray image detector.

FIG. 9 is a perspective view showing an example of use of a conventional dental X-ray image detector.

[Explanation of symbols]

 1 X-ray detection element 2 Sensor case 3 Sensor cable

Claims (4)

[Claims] 1. A substantially plate-shaped X-ray detecting element for detecting an X-ray irradiation image of a tooth, a sensor case including the X-ray detecting element, and an input signal of the X-ray detecting element to the outside of the sensor case. A dental X-ray image detector, comprising: a sensor cable to be pulled out, wherein the sensor cable is pulled out obliquely rearward with respect to the X-ray irradiation direction from a corner in the longitudinal direction of the sensor case. 2. A substantially plate-shaped X-ray detection element for detecting an X-ray irradiation image of a tooth, a sensor case containing the X-ray detection element, and an input / output signal line of the X-ray detection element as a sensor case. A dental X-ray image detector comprising a sensor cable that is pulled out to the outside, and the tooth row contact surface of the sensor case is configured by a curved surface that is convex outward of the sensor case. 3. A substantially plate-shaped X-ray detection element for detecting an X-ray irradiation image of a tooth, a sensor case including the X-ray detection element, and an input / output signal line of the X-ray detection element as a sensor case. A dental X-ray image detector comprising a sensor cable that is pulled out to the outside, and a back surface of the sensor case with respect to the X-ray irradiation side is inclined with respect to a back surface of a plate-shaped X-ray detection element included therein. 4. A substantially plate-shaped X-ray detection element for detecting an X-ray irradiation image of a tooth, a sensor case including the X-ray detection element, and an input / output signal line of the X-ray detection element as a sensor case. A dental X-ray image detector comprising a sensor cable to be pulled out and the sensor case being made of a synthetic resin material having elasticity.