JPH0451777Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dental X-ray irradiation instruction device used during dental X-ray photography.

[Conventional technology]

When taking an X-ray photograph of teeth, a dental X-ray film package (hereinafter simply referred to as a film package) is placed inside the tooth to be photographed (on the tongue side), and the This is done by irradiating with radiation. In such X-ray photography, it is necessary to hold the film package in place during the photography. The support for holding the film package will be explained with reference to the drawings.

FIG. 9 is a sectional view of the inside of the oral cavity when a conventional support device is used. In the figure, 1a and 1b are teeth, 1a ₁ and 1
b ₁ is the occlusal surface of the crown of the teeth 1a and 1b, 2 is the gingiva, 3 is the tongue, and 4 is the cheek. 5 is tooth 1a and tooth 1
It is a support tool that is inserted between the parts B, and is made of a relatively flexible member and has a hexahedral shape with a square cross section. 6 is a film package adhered to the end face of the support 5, and 7 is a sealed X-ray film.

Initially, the support 5 and the film package 6 are prepared separately. During X-ray photography, the support 5
is adhered to a predetermined location of the film packaging body 6, and this film packaging body 6 is inserted into the oral cavity, and the X of the tooth 1a is
The film package 6 is positioned at a position where line photography can be taken, and the film package 6 is held in that position by biting the support 5 between the teeth 1a and 1b. Then arrow X
As shown in FIG. 2, when X-rays are irradiated from the outside of the cheek 4 toward the tooth 1a, an X-ray image (latent image) of the tooth 1a is obtained on the X-ray film 7. The film packaging body 6 is removed from the oral cavity, the packaging of the film packaging body 6 is peeled off in a dark place, the X-ray film 7 is taken out, and the phenomenon is fixed. A line image is obtained.

By the way, in the above-mentioned X-ray photography, it is not possible to accurately determine the position of the X-ray film 7 from the outside, and by extension, the position of the tooth 1a to be photographed, and furthermore, the inclination of the X-ray film 7 is completely unknown. It is. Therefore, in conventional X-ray photography, the photographer has an idea of the approximate position of the X-ray film 7 or the tooth 1a, and irradiates the X-ray toward that part. Since X-rays diffuse to some extent, an X-ray image of the tooth 1a can be obtained even with such a method. However, it is not only extremely troublesome to have to estimate the position of the X-ray film 7 or the target tooth from the outside every time an image is taken, but also to narrow down the X-rays in order to obtain a clearer X-ray image. In this case, it is not possible to perform accurate X-ray irradiation with mere registration, and it is difficult to obtain a clear X-ray image. Further, the X-ray film 7 is normally inclined with respect to the vertical line connecting the upper and lower teeth 1a and 1b due to the presence of the gums 2, and in this case, the tooth 1 to be photographed is
It would be almost impossible to capture a full-sized image of a, and there would be a risk of a lack of accuracy.

In order to solve this problem, a device described in, for example, Japanese Patent Laid-Open No. 197240/1983 has been proposed. This device consists of a bite plate,
The alignment member includes a film holding means having a protrusion and an alignment arm, a film holder having three recesses and supporting a film package, and an alignment ring having three through holes. Select the recess to be fitted into the projection and attach the film holder to the film holding means. Select the through hole and insert the alignment ring into the alignment arm. This device can obtain accurate X-ray images by irradiating X-rays onto the

[Problems to be Solved by the Invention] However, the above-mentioned conventional device has a film holding means formed with projections, a film holder formed with three recesses to be fitted into the projections, and three through holes inserted into the alignment arm. A formed alignment ring is required, which not only makes the structure complicated and expensive, but also requires selecting three recesses, three through holes, and the orientation of the alignment ring depending on the tooth to be imaged. First, there was a problem in that the operations before X-ray photography were troublesome.

An object of the present invention is to solve the problems in the prior art described above and to provide a dental X-ray irradiation instruction device that has a simple structure and is easy to operate before imaging.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a support member having a film attachment part to which a dental X-ray film package is attached and an occlusion part to be engaged by teeth; In a dental X-ray irradiation instruction device comprising an arm extending outside the mouth from the support member when the occlusal part is occluded, and an index section attached to the arm, the index section defines a first surface. a second indicator defining a second surface inclined at a predetermined angle with respect to the first surface; and connecting the first indicator and the second indicator. and a connecting body, and a mounting structure is provided in the vicinity of the joint between the first indicator body and the connecting body, each of which is detachably attached to the distal end portion of the arm. .

[Effect]

When taking an X-ray photograph, a film package is attached to the film attachment part of the support member, and this is inserted into the oral cavity, and the film package is positioned inside the tooth to be photographed, and the occlusal part is bitten. In this state, the arm begins to extend outside the oral cavity. Here, one of the attachment structures provided on the indicator part is selected according to the position of the tooth to be imaged, and when the indicator part is attached to the arm using the selected attachment structure, the first indicator of the indicator part is attached. The body or the second indicator body is located at a position opposite to the film packaging body, and if the film packaging body is tilted, it has an inclination of approximately 1/2 of that slope, and the film packaging body is not tilted. The case is parallel to this. Therefore, if X-rays are transmitted perpendicularly to the plane defined by the first or second target body, the X-rays will surely irradiate the film package. Moreover, it is possible to obtain a full-size image of the tooth.

〔Example〕

Hereinafter, the present invention will be explained based on the illustrated embodiments.

FIG. 1 shows a dental X according to the first embodiment of the present invention.
A perspective view of the ray irradiation instruction device; FIGS. 2a, b, and c are respectively a perspective view, a front view, and a side view of the indicator portion shown in FIG. 1; FIG. 3 is a perspective view of the indicator shown in FIGS. 2a, b, and c. FIG. 3 is a front view of the dental X-ray irradiation instruction device with the section attached. In each figure, 10 indicates a dental X-ray irradiation instruction device, and 11 indicates a support member. The support member 11 has a hexahedral shape with a rectangular cross section, and is made of a soft material such as foamed polyethylene, sponge, or rubber. Reference numeral 12 denotes an attachment portion of the support member 11 to which a film package is attached. Adhesive is applied to the attachment portion 12 in advance, and the film package 6 is adhered thereto as shown by the dashed line during X-ray photography. Reference numerals 13a and 13b are occlusal portions on the upper and lower surfaces of the support member 11, which are the portions that are bitten by upper and lower opposing teeth during X-ray photography.

14 is an arm projecting from the support member 11 in a substantially L-shape. The arm 14 includes a portion 14a extending from the end of the support member 11 along the surface opposite to the surface forming the attachment portion 12, a portion 14b connected to this portion 14a and extending in a direction substantially perpendicular thereto, and this portion. 14b and a mounting portion 14c at the tip thereof. Reference numeral 15 denotes an index section attached to the mounting section 14c on the arm 14.

The indicator portion 15 is entirely ring-shaped as shown in FIGS. 2a, b, and c. Reference numeral 15a denotes a first index body forming the lower semicircular portion of the index portion 15 in the figure. Another semicircle (which does not actually exist) of this first index body 15a is shown by a broken line. Reference numeral 15b denotes a second index body forming an upper semicircular portion of the index section 15. Another semicircle of this second indicator body 15b (does not actually exist)
is drawn with a broken line. 15c is the first indicator body 1
5a and the second indicator body 15b. 16 is a first indicator body 15a and a connecting body 15c
This is a mounting body that is fixed near the joint with the holder, and has a through hole 17. The index portion 15 is attached to the arm 14 by fitting the through hole 17 into the attachment portion 14c of the arm 14. 16a, 16b, 16c,
16d indicates each mounting surface of the mounting body 16. Note that the mounting surface 16b is a surface that faces the mounting surface 16a, but is not shown.

As shown in FIG. 2c, there is an inclination of a predetermined angle α between the first indicator body 15a and the second indicator body 15b of the indicator part 15. That is, in FIG. 2b, the plane formed by the second indicator body 15b is inclined by an angle α with respect to the plane formed by the first indicator body 15a (the same plane as the plane of the paper). In addition, in FIG. 2c, this angle α is drawn in a slightly exaggerated manner. Further, the contact angle will be described later. Furthermore, a through hole 17 in the mounting body 16
The penetration axis of is perpendicular to the plane constituted by the first indicator body 15a.

Next, the dental X-ray irradiation instruction device 10 of this embodiment
A method of taking an X-ray photograph using the method will be explained with reference to FIGS. 4a and 4b. Figure 4a is a cross-sectional view of a part of the oral cavity seen from above the head, Figure 4b is the line taken in Figure 4a.
It is a sectional view along Vb-Vb. In Figure 4 a and b,
Components that are the same as those shown in FIGS. 1 to 3 and 9 are designated by the same reference numerals, and their explanations will be omitted.

When taking an X-ray photograph, first, the film package 6 is attached to the attachment part 12 using an adhesive applied to the attachment part 12 (the state shown in the dashed line in FIG. 1). next,
Depending on where in the dentition the tooth to be photographed is located, one of the attachment bodies 16 is selected, and this is fitted into the attachment part 14c of the arm 14, so that the index body 15 is attached. In the case shown, the mounting surface 16 of the mounting body 16
b is the mounting portion 14c with the second index body 15b facing upward.
is mated to. Due to this attachment, the second indicator body 15b faces the film package 6 and has a certain inclination with respect to the film package 6. The reason for selecting the mounting surface of the mounting body 16 will become clear in the following explanation. In this state, the film package 6 is inserted into the oral cavity together with the support member 11. Here, if the tooth to be imaged is the tooth 1a, the film package 6 is placed so that the approximately central part thereof coincides with the tooth 1a as shown in FIG.
As shown in b, the film package 6 is placed inside the tooth 1a (on the side where the tongue 3 is located). Next, when the bite portions 13a and 13b are bitten with the teeth 1a and 1b, the film package 6 is held in that position. At this time, since the gum 2 is present in the film package 6, the line connecting the teeth 1a and 1b, that is, the line shown in FIG.
Vertical line D (occlusal parts 13a, 13
It is held at a certain inclination with respect to the perpendicular line of b. This slope is almost constant. Incidentally, since the support member 11 is actually made of a soft material, the occlusal parts 13a and 13b are slightly recessed, but this recess is not shown in the figure.

In the state in which the film package 6 is held as described above, the portion 14a of the arm 14 begins to extend outside the oral cavity, and the portion 14b straddles the thick part of the cheek 4 and begins to extend laterally. In this state, the second indicator body 1
5b is located at a position facing substantially the center of the film package 6 with a predetermined inclination α (approximately half the inclination of the film package 6).
Next, when X-rays are irradiated with the irradiation end face of the X-ray irradiation device (not shown) aligned with the plane constituted by the second target body 15b, the X-rays emit light as shown by the two-dot chain line in FIG. 4b. The radiation is emitted perpendicularly to the plane of the second index body 15b, and as a result, an X-ray image (latent image) is obtained on the X-ray film 7 that is approximately the same in size as the actual size of the tooth 1a. The reason will be explained later. When the X-ray irradiation is completed, the film package 6 is removed from the oral cavity together with the dental X-ray irradiation instruction device 10, the indicator body 15 is removed from the tip 14c, and the support member 11 is removed.
After peeling off the X-ray film 7 (or with the support member 11 still attached), the X-ray film 7 is taken out in a dark place and subjected to predetermined development and fixing processes.

Here, the inclination of the second index body 15b and the tooth 1
The reason why the actual size X-ray image of a is obtained is shown in Figure 5 a,
This will be explained with reference to the diagram shown in b. Now, it is assumed that the film package 6 is held at an angle θ with respect to the vertical line D, and the length of the tooth 1a in the direction of the vertical line D (the length between points P ₂ and P ₃ ) is L.
shall be. In this state, if X-rays are irradiated perpendicularly to the vertical line D, a point will appear as shown in Figure 5a.
P ₂ and P ₃ are points P ₂ ′ and P ₃ ′ on the X-ray film, respectively.
projected on. The dimension between points P ₂ ′ and P ₃ ′ is L/cosθ
However, since cos θ is smaller than 1, the dimension L/cos θ is larger than the dimension L. On the other hand, when X-rays are irradiated perpendicularly to the X-ray film surface,
P ₂ and P ₃ are projected onto points P ₂ ″ and P ₃ ″ on the X-ray film, respectively. The dimension between points P ₂ ″ and P ₃ ″ is expressed as L·cosθ, and since cosθ is smaller than 1, the dimension L·cosθ is smaller than the dimension L. In this way, when the film package 6 is held tilted, even if the X-rays are irradiated perpendicularly to the vertical line D or perpendicularly to the X-ray film surface, the
It is not possible to obtain a line image.

Here, a means for obtaining a full-size X-ray image of teeth will be considered. To this end, consider a line E having an angle of 1/2 of the inclination angle .theta. of the film package 6, as shown in FIG. 5b. Then, X-rays are irradiated perpendicularly to this line E. Then points P ₂ and P ₃ are X
It is projected onto points P ₂ and P ₃ on the line film. In this state, triangles P ₁ , P ₃ , and P ₃ formed by the intersection point P ₁ , point P ₃ , and point P ₃ of the vertical line D and the extension line of the film package 6 are isosceles triangles. Therefore, the dimension between points P ₂ and P ₃ and the dimension between points P ₂ and P ₃ are the same dimension L. In the end, the film package 6
If the film packaging body 6 is held tilted, the film packaging body 6
If X-rays are irradiated perpendicularly to the inclination of 1/2 of the inclination of the tooth, an X-ray image of the actual size of the tooth can be obtained. This 1/2 slope corresponds to the angle α shown in FIG. 2c.

Now, in the above example, the case where the film package 6 is positioned at an angle has been explained. However, the dimensions of each part of the oral cavity, the alignment of the teeth, the swelling of the gums, etc. vary greatly from person to person.
As mentioned above, there are cases where the film package 6 remains vertical without being tilted. In this case, if the attachment body 16 is attached to the mounting portion 14c so that the first index body 15a faces the film package 6, its surface becomes parallel to the surface of the film package 6. Therefore, if X-ray photography is performed by aligning the irradiation end surface of the X-ray irradiation device with the surface of the first index body 15a,
A full-sized X-ray image of the tooth is obtained on the X-ray film 7.

Here, regarding the attachment to the attachment part 14c when performing X-ray photography of each part of the dentition, selection of each attachment surface 16a to 16d of the attachment body 16, the first index body 15a, and the second index body 15b is made. becomes as follows.

Left upper jaw...Mounting surface 16 with index body 15b up
Select b (with tilt) Select mounting surface 16d with index body 15a up (no tilt) Left lower jaw...Mount surface 16 with index body 15b down
Select d (with tilt) Select mounting surface 16b with index body 15a facing down (no tilt) Right upper jaw... Mounting surface 16 with index body 15b facing up
Select d (with tilt) Select mounting surface 16b with index body 15a up (no tilt) Right lower jaw...Mount surface 16 with index body 15b down
Select b (with tilt) Select mounting surface 16d with index body 15a facing down (no tilt) Anterior maxilla... Mounting surface 16 with index body 15b facing up
b or mounting surface 16d (tilted) Select mounting surface 16b or mounting surface 16d with index body 15a up (no tilt) Front mandible...Mounting surface 16 with index body 15b down
b or mounting surface 16d (inclined) Select mounting surface 16b or mounting surface 16d with index body 15a facing down (no tilt) As described above, first index body 15a, second index body 15b, and By combining the four mounting surfaces 16a to 16d of the mounting body 16, X-ray imaging of all teeth can be covered.

As described above, in this embodiment, an arm is extended from the support member, and a combination of the first indicator body, the second indicator body, and the four mounting surfaces is selected and the indicator body is attached to the tip of this arm. When the surface of the film package is perpendicular, it is parallel to the surface of the film package, and if it is inclined, it is made to have an inclination of 1/2 of the slope of the surface. In addition to being easy and accurate, it is also possible to obtain full-size X-ray images of teeth, allowing for accurate diagnosis and treatment, and has a simpler structure than conventional devices. is clear. Furthermore, compared to the operation of selecting one of the three recesses of the film holder and selecting one of the three through holes of an alignment ring separate from the film holder, as in the conventional device, In this embodiment, the operation is easy because it is only necessary to select one of the two attachment bodies of the index part and its orientation.

FIGS. 6a and 6b show a dental X according to an embodiment of the present invention.
FIG. 2 is a front view and a side view of an indicator section and a mounting structure of the radiation instruction device. In each figure, parts that are the same as those shown in FIGS. 2a, b, and c are given the same reference numerals, and explanations thereof will be omitted. 20 is the first indicator body 15a and the connecting body 15
The protrusion 21 attached near the joint with the protrusion 20 is a flat guide plate that is fixed to the protrusion 20 and protrudes to the left and right of it with approximately equal length. Reference numeral 22 designates L-shaped clamping pieces extending from the upper and lower sides of the mounting body 16. 23 is a groove formed between the side surface of the mounting body 16 and both clamping pieces 22. By engaging the groove 23 with the guide plate 21, the mounting body 16
is slidably attached to the guide plate 21.

As mentioned above, the condition of the gums, dentition, lips, cheeks, etc. varies considerably from person to person. Due to these differences, the position of the mounting portion 14c of the arm 14 when the support member 11 is held in the oral cavity in an occlusal manner to perform X-ray imaging differs depending on the person. Furthermore, even if the patient is the same person, the position of the mounting portion 14c will be different if the teeth to be photographed are different. Therefore, when the attachment body 16 is attached to the attachment part 14c, there is a risk that the index part 15 will come into contact with the outer surface of the cheek and cause distortion, and if such distortion occurs, accurate imaging cannot be expected. . However, in this embodiment, the attachment body 16 can be slid back and forth with respect to the indicator body 15 by the guide plate 21, so if there is a risk that the indicator part 15 may come into contact with the cheek, the attachment body 16 can be moved back and forth against the cheek. If it is slid to the side and attached to the attachment part 14c, the index part 15
can be positioned away from the cheek. The distance between the index portion 15 and the cheek can also be adjusted to an appropriate distance by sliding the attachment body 16.

Note that in this embodiment, the guide plate 21 is connected to the index portion 1.
5 side and the groove is formed on the mounting body 16 side, but conversely, the mounting body 1 is attached to the tip of the guide plate.
6 may be fixed, and the index portion 15 may be provided with a guide groove or a guide hole through which a guide plate is inserted.

In this way, in this embodiment, the attachment body is designed to be movable in the front-to-back direction of the indicator portion, which not only provides the same effect as the previous embodiment, but also makes it possible to maintain an appropriate distance between the outer surface of the cheek and the indicator portion.

7a to 7d are diagrams showing the index part and mounting structure of the dental X-ray irradiation instruction device according to the third embodiment of the present invention, FIG. 7a is a front view, and FIGS. 7b and 7c are Lines bb and c shown in FIG. 7a, respectively.
FIG. 7d is an enlarged sectional view taken along line d-d shown in FIG. 7c. In each figure, the second
Components that are the same as those shown in FIGS. 25 is the first indicator body 15a
A mounting plate is attached near the joint between the connecting body 15c and the connecting body 15c, 26 is a pin implanted in the mounting plate 25, and 27
is a rotating body rotatably fitted into the pin 26. A mounting body 16 is fixed to the tip of the rotating body 27. In Fig. 7a, the rotating body 2 on the left side of the figure
7 is in a horizontal position, and the rotating body 27 on the right side is in an upward position.

Grooves 29 are formed on the surface of the mounting plate 25 at intervals of 90° in the vertical and horizontal directions, as shown in FIGS. 7c and d.
a to 29d are formed. Further, the pin 26 is provided with an enlarged head 26a and a slit 26b whose diameter is slightly larger than that of the pin 26. Further, the rotating body 27 has a protrusion 2 near the hole into which the pin 26 is fitted.
8 is provided.

When the rotary body 27 is fitted into the pin 26, the hole of the rotary body 27 is strongly pressed against the pin 26, so that the slit 26b is contracted and the diameter of the enlarged head 26a is reduced, thereby achieving fitting. After fitting, the slit 26b opens, the enlarged head 26a expands, and the rotating body 27 is prevented from falling off the pin 26. When the rotating body 27 is rotated in this state,
According to the rotation, the protrusion 28 of the rotating body 27,
Grooves 29a to 29 while sliding on the surface of the mounting plate 25.
It will fit into one of the grooves d, and then come out of that groove and fit into the adjacent groove. When the projections 28 fit into the grooves 29a to 29d, the rotating body 27 is held in that position.

Similarly to the second embodiment, this embodiment also has an indicator portion 15.
This prevents the situation where the cheek and the
During line imaging, the rotating body 27 on the side to which the attachment body 16 attached to the attachment part 14c is fixed is held in a horizontal position by fitting the protrusion 28 with the groove 29a or the groove 29d, and the attachment body 16 is held in a horizontal position. It is attached to the attachment part 14c. This allows the indicator portion 15 to be separated from the outside of the cheek.

In this way, in this embodiment, the rotating body is rotatably attached to the index part, and the mounting body is fixed to the tip of the rotating body, so that it not only has the same effect as the second embodiment, but also eliminates unnecessary rotation. By rotating the body upward and holding it in that position, it is possible to prevent the rotating body and the mounting body from getting in the way when photographing or storing the indicator.

8a to 8d are diagrams showing the indicator part and mounting structure of the dental X-ray irradiation instruction device according to the fourth embodiment of the present invention, FIG. 8a is a front view, and FIGS. 8b and c
is an enlarged front view of each mounting structure, Figure 8d is Figure 8c
It is a side view seen from the direction of arrow d. In the figure, the same parts as those shown in FIGS. 2a to 2c are given the same reference numerals, and their explanation will be omitted. Reference numeral 15' denotes an index section corresponding to the index section 15. The index section 15' of this embodiment differs from the index section 15 in that the first index body 15a and the connecting body 15c are connected via a rotating section. In each figure, one rotating part is designated by the reference numeral 31,
Further, the other rotating portion is indicated by the reference numeral 32.

As shown in FIG. 8b, the rotating part 31 is connected to the connecting body 1.
Plate body 31 fixed to or integrally formed with 5c
c, a plate-shaped body 31a fixed to or integrally formed with the first index body 15a, and a pin 31 that rotatably connects the plate-shaped bodies 31c and 31a to each other;
It is composed of p. On the other hand, the rotating part 32
As shown in FIG.
a plate-shaped body 32a fixed to or integrally formed with a;
and a screw 32b that fixes the plate-like body 32c and the plate-like body 32a. In addition, 32n in FIG. 8c indicates a nut. Further, as shown in FIG. 8d, a mark 33a is attached to the tip of the plate-shaped body 32c, and a scale 33b is attached to the plate-shaped body 32 opposite to the mark 33a.

As mentioned above, the condition of the oral cavity varies considerably depending on the person. The plane defined by the index body 15a or the second index body 15b is not necessarily 1/2 of the inclination angle θ of the film package 6 as shown in FIG. 5B. In such a case, it is clear that the desired X-ray imaging cannot be performed. However, in this embodiment, the inclination of the index portion 15 can be easily adjusted even in such a case. That is, by loosening the screw 32b of the rotating part 32, the rotation between the plate-like bodies 32c and 32a (the rotation between the first index body 15a and the connecting body 15c) is achieved.
becomes free. On the other hand, the rotating portion 31 is always free to rotate. Therefore, the first indicator body 15
The angle between a and the second indicator body 15b is variable. This change in angle can be known from the correspondence between the mark 33a and the scale 33b. When the desired plane is obtained by this rotation, the screw 32b is tightened to fix the plate-like bodies 32c and 32a, and X-ray photography is performed.

In this way, in this embodiment, since the rotating part is interposed between the first indicator body and the connecting body, in addition to the effect of the first embodiment, it is possible to further adjust the inclination of the plane of the indicator part. It also has the effect of being able to.

The embodiments of the present invention have been described above. In the description of each of these embodiments, an example has been described in which the distal end of the arm and the mounting body are engaged by a protrusion and a hole into which the protrusion is inserted, but this engagement may be any type of engagement. good. Furthermore, although a ring has been described as an example of the index body, the index body is not limited to a ring, and may have any shape as long as it is made of a material that transmits X-rays. For example, plates of various shapes, plates with holes of various shapes, cross-shaped rods, etc. can be used.

Furthermore, as a means for attaching the film package to the support member, an example in which adhesive is used has been described. It is possible to employ means for providing a wall surface along the surface of the package, and further means for providing a portion on the upper end of the wall surface of this means for clamping the upper end of the film package.

[Effect of idea]

As described above, in the present invention, an arm extending from the support member is provided, and the indicator has a first indicator and a second indicator with different inclinations at a position facing the film package on the arm. Since it is attached through the mounting structure, it is possible to accurately indicate the X-ray irradiation position, which makes it possible to perform X-ray irradiation easily and accurately.
It is clear that full-size X-ray images of teeth can be obtained, accurate diagnosis and treatment can be performed, and the structure is simpler than conventional devices. Furthermore, compared to the operation of selecting one of the three recesses of the film holder and selecting one of the three through holes of an alignment ring separate from the film holder, as in the conventional device, In the present invention, the operation is easy because it is only necessary to select one of the two mounting structures of the index part and its orientation.

[Brief explanation of the drawing]

FIG. 1 shows a dental X according to the first embodiment of the present invention.
A perspective view of the ray irradiation instruction device; FIGS. 2a, b, and c are respectively a perspective view, a front view, and a side view of the indicator portion shown in FIG. 1; FIG. 3 is a perspective view of the indicator shown in FIGS. 2a, b, and c. A front view of the dental X-ray irradiation instruction device with the part attached,
Figures 4a and b are cross-sectional views of a part of the oral cavity; Figures 5a and 5b are cross-sectional views of a part of the oral cavity;
6b is a diagram for explaining the inclination of the indicator body, and FIGS. 6a and 6b are front and side views of the indicator part and mounting structure of the dental X-ray irradiation instruction device according to the second embodiment of the present invention. , FIG. 7a is a front view of the indicator part and mounting structure of the dental X-ray irradiation instruction device according to the third embodiment of the present invention, and FIGS. 7b and c are lines b to 7a shown in FIG. 7a.
b, cross-sectional view along line c-c, FIG.
Enlarged sectional view along line d-d shown in Figure c, No. 8
Figure a is a front view of the indicator part and mounting structure of the dental X-ray irradiation instruction device according to the fourth embodiment of the present invention, and Figures 8 b and c are enlarged front views of the rotating part shown in Figure 8 a. , FIG. 8d is a side view of the rotating part shown in FIG. 8c, and FIG. 9 is a sectional view of a part of the oral cavity using a conventional support. DESCRIPTION OF SYMBOLS 10... Dental X-ray irradiation instruction device, 11... Support member, 12... Attachment part, 13a, 13b... Occlusal part, 14... Arm, 15... Indicator part, 15a...
First indicator body, 15b...Second indicator body, 15c
... Connecting body, 16 ... Mounting body, 17 ... Through hole,
21... Guide plate, 27... Rotating body, 31, 32
...Rotating part.

Claims (1)

[Claims for Utility Model Registration] (1) A support member having a film attachment part to which a dental X-ray film package is attached and an occlusion part that is engaged by teeth, and when the occlusion part is engaged, the support member A dental X comprising an arm extending outside the mouth and an indicator attached to the arm
In the radiation irradiation instruction device, the indicator portion is
a first index body that defines a surface, and a second index body that defines a second surface that is inclined at a predetermined angle with respect to the first surface.
an indicator body, and a connecting body that connects the first indicator body and the second indicator body, and each arm is provided near a joint between the first indicator body and the connecting body. 1. A dental X-ray irradiation instruction device, characterized in that it has a mounting structure that is detachably attached to a distal end portion of the dental X-ray irradiation instruction device. (2) Utility Model Registration The dental X-ray irradiation instruction device according to claim 1, wherein the indicator portion is formed in a ring shape. (3) The dental X-ray irradiation instruction according to claim 1, wherein the first indicator body and the second indicator body are formed by semicircles of a circular ring. Device. (4) In paragraph 1 of claims for utility model registration, the first indicator body and the second indicator body are
A dental X-ray irradiation instruction device characterized by being formed of a plate that transmits radiation. (5) Utility Model Registration The dental X-ray irradiation instruction device according to claim 1, wherein the mounting structure includes a through hole into which the arm is inserted. (6) Utility Model Registration Claim 5: The dental X-ray irradiation instruction device as set forth in claim 5, wherein the central axis of the through hole is perpendicular to the first surface. (7) In claim 1 of the utility model registration claim, the mounting structure is composed of guides each fixed in the vicinity of the joint, and a mounting body slidably provided on the guide. A dental X-ray irradiation instruction device characterized by: (8) In claim 1 of the utility model registration claim, the mounting structure is composed of a rotating body rotatably attached to the joint portion, and a mounting body fixed to the rotating body. A dental X-ray irradiation instruction device characterized by: (9) The dental X-ray irradiation instruction device according to claim 1, wherein the connecting body is rotatably connected to the first index body by a locking member. . (10) The dental X-ray irradiation instruction device according to claim 9, wherein the locking member is a screw member. (11) In paragraph 9 of claims for utility model registration,
A dental X-ray irradiation instruction device, wherein the connecting body and the first index body are provided with scales related to each other.