JP3445506B2 - Dental X-ray film body - Google Patents

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 film body, and more particularly to an oral X-ray film body which is improved in the form of the X-ray film and the X-ray film body and is adapted to the oral cavity form. .

[0002]

Background of the Invention and Problems to be Solved by the Invention As a dental X-ray dental film, an X-ray film body used for radiography is provided as a standard type and a pediatric type as an intraoral insertion type. There is. These are properly used according to the size of the subject's oral cavity. In addition, both of them are usually held at the fingertips of the subject in the oral cavity,
Habitual.

Both the X-ray film and the X-ray film body of the type to be inserted into the oral cavity have a rectangular outer shape, and the standard type which is frequently used has a size of 4.4 cm × 3.3 cm.
On the other hand, if the subject is, for example, a person of the size of the oral cavity in which the standard type should be used, it does not depend on the imaging site in the oral cavity-therefore, for example, whether it is the upper jaw side or the lower jaw side. It is the current situation that such a standard rectangular X-ray film is used regardless of whether it is on the right side or the left side, or on the molars, the front teeth, and the like. The situation is similar for the pediatric type.

This current system has room for further improvement based on the following considerations. In the dental practice-for example, in quantitative analysis of jaw bone density-when higher accuracy of oral X-ray imaging is required, if there is bending of the X-ray film surface, etc.
It becomes a factor of image deletion. As a result, if the X-ray image of the imaged region is displayed, the quantitative analysis becomes inaccurate, and accordingly, it is difficult to sufficiently satisfy the demand. According to the consideration of the present inventor, one cause of the film bending is the complicated shape of the inner surface of the oral cavity. Regardless of the imaged part in the oral cavity, it relies on one type of external rectangular X-ray film body, and in the current system to which this is applied, dentists etc. place the X-ray film body in the oral cavity. However, there is a limit in individual methods such as devising the direction, etc. for each subject. Further, the corner portion of the X-ray film body having the rectangular outer shape may cause tenderness on the inner surface of the oral cavity. As a result, it is difficult to take sufficient measures, and no effective and drastic solution to this has been found yet. According to the consideration of the present inventors, the phenomenon such as film bending is also due to the pressure contact holding of the dental X-ray film body by the subject in the oral cavity. X is required to be kept pressed by the subject in the oral cavity.
In the case of the X-ray film body, the built-in X-ray film is easily deformed when the X-ray film body is pressed against the imaged site with a fingertip at the time of photographing without effective means for preventing bending. As a result, the film is warped and the image flows, and the image tends to be unsuitable for measurement, analysis, and the like, which require accuracy.

The inventor of the present invention has previously found that Japanese Patent Application Laid-Open No. 6-28505
No. 9 discloses a dental X-ray film body with a titanium metal piece (film-embedded X-ray film pack) and an X-ray imaging apparatus. According to this, an X-ray film blackness reference titanium piece, which is simultaneously photographed during X-ray photography, is used. This reference titanium piece is useful for accurate quantitative measurement and analysis of jaw bone density. This method can be applied regardless of whether it is a standard type or a pediatric type, and is effective. However, also in this case, if the image deletion occurs due to the curvature of the X-ray film surface, the quantitative analysis becomes inaccurate, and as a result, the usefulness of the simultaneous photographing of the blackening degree reference metal is reduced. , Sometimes not fully utilized.

Therefore, it is desirable that such bending of the dental X-ray film can be suppressed or prevented. It is also desirable to prevent the occurrence of image deletion due to film warping, ensure accurate photography, and easily respond to more accurate measurement, quantitative analysis, etc. Alternatively, the tenderness given to the inner surface of the oral cavity of the subject can be alleviated or reduced, and the tenderness at the time of oral X-ray photography can be released.

The object of the present invention is to improve from the above points, and as a dental X-ray film body which is placed in the oral cavity and used for X-ray photography, at the time of X-ray photography, Another object of the present invention is to provide an improved dental X-ray film body corresponding to the oral morphology, which is capable of exerting an advantageous effect in quantitative analysis based on an X-ray image.
Another object of the present invention is suitable in the case of a dental X-ray film body that requires pressure contact and holding by the subject in the oral cavity, and has a means for effectively preventing film bending and the like due to the pressure contact and holding. It is to provide an X-ray film body for use.

[0008]

The dental X-ray film body according to the present invention is a rectangular-shaped dental X-ray film which is placed in the oral cavity and used for X-ray photography. The X-ray film has only a quarter portion including one corner portion of the rectangular shape, a point close to the midpoint of a long side corresponding to the quarter portion of the rectangular shape on the side closer to the one corner portion, and Dental X having a curved portion which is convex toward the outside and which connects a midpoint of a short side corresponding to the quadrant of the rectangular shape to a point which is close to the one corner portion side.
A dental X-ray film body comprising a line film and a film housing body for housing the dental X-ray film,
The film container has a shape similar to the outer shape of the dental X-ray film to be housed and has a predetermined size, and the film container is provided on one side of the film container. The subject is characterized in that it is a plate body that a subject can apply and press while holding it in the oral cavity, and at least a shape-retaining plate that is more difficult to bend than the built-in dental X-ray film is provided. It is a thing.

The shape-maintaining plate is characterized by having a shape similar to the outer shape of the film storage body and having a shape smaller than a predetermined size.

Further, the shape holding plate is characterized in that it has a shape that is concentrically reduced by 3 mm from the outer circumference of the film container.

Further, the morphology-maintaining plate is characterized in that a protrusion is provided at a central portion of the plate body on which the fingertip of the subject touches or a portion in the vicinity of the central portion.

Further, the shape holding plate is approximately 0.5 mm.
It is a thick plastic plate,
It is characterized in that it is attached to the film container.

Further, the film container holds a bag-shaped portion for storing the dental X-ray film and a lid placed on the back side of the film container so as to seal the opening of the bag-shaped portion. And a form retaining plate, wherein the form retaining plate is attached to the lid portion or is provided so as to be shared by the lid portion. To do.

In the present invention, X is placed in the oral cavity.
There is provided a dental X-ray film body including a rectangular-shaped dental X-ray film used for radiography and a film storage body that stores the dental X-ray film. The dental X-ray film of the dental X-ray film body has only one quadrant including one corner of the rectangular shape, and one of the quadrants of the rectangular shape at the midpoint of the long side corresponding to the quadrant. A point that is closer to the corner portion side and a point that is closer to the corner portion side closer to the midpoint of the short side corresponding to the quadrant of the rectangular shape connects the convex point toward the outside. The curved line portion is formed, and the film container for housing the dental X-ray film has a shape similar to the outer shape of the dental X-ray film to be housed and has a predetermined size. ing.

The curved portion can adopt a shape corresponding to a complicated jaw shape, and is useful for suppressing or preventing the bending of the dental X-ray film. Moreover, the tenderness given to the inner surface of the oral cavity of the subject can be alleviated or reduced, which brings an advantage of being relieved from the tenderness at the time of radiography of the oral cavity. Further, when the occurrence of image deletion due to film warping or the like is prevented, accurate photographing is ensured, and more accurate measurement, quantitative analysis, etc. are required, this can be easily met. The dental X-ray film on which the curved portion is formed has an asymmetrical shape on both sides of a line passing through the center of the film along the longitudinal direction. The posterior part is used by arranging it in the oral cavity so that the portion that faces the curved portion on the side where the curved portion is formed is disposed rearward (the inner side of the oral cavity), and the posterior portion is arranged. It is suitable for radiography of the vicinity of the molars and can be used effectively and selectively according to the radiography site.

The present invention also provides a dental X-ray film body having a shape holding plate, wherein the shape holding plate is provided on one side of the film container. According to the dental X-ray film body with this shape-maintaining plate, it is suitable for the dental X-ray film body that needs to be pressed and held by the subject in the oral cavity, and it is possible to prevent film bending and the like due to the pressure and hold. There is provided a dental X-ray film body having effective prevention means. The shape holding plate is a plate that is provided on one surface side of the film container and can be pressed by applying a finger when the subject holds the film container in the oral cavity, and at least a built-in dental X-ray film. It's harder to bend than. This shape-maintaining plate prevents the occurrence of image deletion due to film warping, etc., and helps to ensure accurate shooting, and when more accurate measurement, quantitative analysis, etc. are required, this can be easily done. I can respond.

Further, the shape-holding plate has a shape similar to the outer shape of the film storage body and has a smaller size by a predetermined dimension, and preferably has a shape concentrically reduced by 3 mm from the outer periphery of the film storage body. . Further, the morphology-maintaining plate is provided with a protrusion at a substantially central portion of the plate body, which is in contact with the fingertip of the subject, or a portion near the central portion. According to the configuration also having this protrusion, film bending or the like is suppressed or prevented, and at the same time, the subject can easily hold pressure contact in the oral cavity. Further, the shape-maintaining plate is a plastic plate having a thickness of about 0.5 mm, and the plastic plate can be provided as a mode in which the plastic plate is attached to the film storage body. A configuration having a bag-shaped portion for accommodating the dental X-ray film and a lid portion that is placed on the back side of the film storage body so as to seal the opening of the bag-shaped portion, The holding plate can be attached to the lid portion or provided in a manner that the lid portion also serves as the holding plate.

According to the dental X-ray film body with the shape-holding plate according to the present invention, each of the above objects can be effectively realized by selectively using the dental X-ray film body according to the region to be imaged. It is possible to provide a dental X-ray film body in a common form. That is, since the dental X-ray film body of the present invention is provided with an asymmetrical dental X-ray film, by appropriately arranging it in the oral cavity and using it, it is possible to use it for photographing the upper left molar or its peripheral portion. It can be used both for photographing the lower right molar region or its peripheral portion, and for photographing the upper right molar region or its peripheral region and lower jaw left molar region or its peripheral region.

The above and other objects, features, and the like according to the present invention will be further clarified by the following description with reference to the accompanying drawings.

[0020]

1 is a view showing a first embodiment of a dental X-ray film body according to the present invention. The figure particularly shows a dental X-ray using the dental X-ray film according to the present invention.
The basic constitution of the X-ray film body is a dental X-ray film body using a typical standard dental X-ray film (Fig. B).
It is a figure for explaining in comparison with this, and the figure A here as a 1st type (common to upper and lower jaws; It is a figure which shows the structure of a suitable type. FIG. 2 is a diagram showing a configuration of a second type (common for upper and lower jaws; shape-compatible type for midline (for front tooth portion) type) according to a reference example of the present invention.

1 and 2, reference numeral 100 denotes a dental X-ray film body according to the first embodiment and the reference example of the present invention. According to these form-corresponding dental X-ray film bodies 100, the same type of dental X-ray film body 101 shown in FIG. The feature is that the second type dental X-ray film body 102 shown in 2 can be used properly. This example is advantageous in this respect as compared with the typical standard dental X-ray film body 500 (X-ray film pack with a built-in film) shown in FIG. 1B.

As is well known, the standard type dental X-ray film body 500 includes a dental X-ray film 510 (standard type size X-ray film of about 41 mm × 30 mm) and its X-ray film 510. And a flat bag-shaped dental X-ray film container 530. Figure 1B
Shows the front side of the X-ray film body 500, that is, the side of the side that is applied to the imaging region of the subject. The film container 530 has a lid portion 536 on the back surface side.

The X-ray film 510 and the film container 530 have a rectangular shape. X-ray film 5
10 is the long side 510-1, 510-1 and the short side 510-.
2, 510-2 having a rectangular shape and four corners (film corners) 515, 515, 515, 51
Have 5. The film container 530 also has a long side 530.
-1,530-1 and short sides 530-2,530-2 have a rectangular shape and four corners 535,535,53
5,535.

As shown in FIG. 1B, the outer shape of a typical standard dental X-ray film body 500 is symmetrical vertically and horizontally in the figure. As a standard type, a dental X-ray film pack having a built-in film, such one type is provided to a user such as a dentist. This is placed in the subject's oral cavity and commonly used for X-ray imaging of various imaging sites.

As mentioned above, depending on the size of the oral cavity,
It is known that a standard type as shown in FIG. 1B and a small pediatric type-although this pediatric type also has an outer shape that is symmetrical in the vertical and horizontal directions and has no directivity-are used properly. However, if the standard dental X-ray film body 500 is the size of the oral cavity, when the left and right sides of the upper jaw (left and right molars) are photographed, the left and right sides of the lower jaw (left and right molars) In any of these 6 aspects, the standard type dental X-ray film body 500 of this one type is used for imaging of the upper jaw and the anterior side of the lower jaw (anterior tooth portion). It is usually used.

On the other hand, as shown in FIGS. 1A and 2, the first type dental X-ray film body 1 of the first embodiment of the present invention.
01 and the second type of dental X-ray film body 102 of the reference example are basically X-ray film with a built-in film of each type so that they can be used properly according to the region to be imaged. It can be provided to the user as a pack. Therefore, according to the dental X-ray film body 100 according to the present invention, the user is basically allowed to
There is an advantage that the X-ray film pack containing the film to be used should be selected from the viewpoint of whether the imaged part is the molar or the anterior part, and it is possible to use it from such a viewpoint. .

Referring to FIG. 1A, this first type dental X-ray film body 101 is a dental X-ray film 1
10 and a flat bag-shaped dental X-ray film container 130 for housing the same. Here, for the purpose of depiction so that the characteristic shape of the built-in X-ray film 110 also appears, the portion of the film container 130 is removed and shown (this point is the same in FIG. 2). .

This X-ray film 110 has four corners (film corners) 111, 112, 113 and 11
4 where one corner (first corner) 11
1 has a roundness 111c. This roundness 111
c is the other corner (second, third and fourth corners) 112,
Unlike 113 and 114, it has a large roundness (curve).

The film container 130 is similar in shape to the X-ray film 110 having such a large roundness 111c, and has an outer shape of a predetermined size. Therefore, this film container 130 also
Of the four corners 131, 132, 133 and 134, the first corner 111 of the X-ray film 110 to be stored.
To the one corner 131 (first corner) corresponding to
31c is attached. The roundness 131c is a large roundness (curve), unlike the other corners (second, third and fourth corners) 132, 133 and 134.

As shown in FIG. 2, the dental X-ray film body 102 of the second type is a dental X-ray film 120.
And a flat bag-shaped dental X-ray film container 140 for housing the same. In the case of this second type, the X-ray film 110 has four corners (film corners) 1.
Out of 21, 122, 123 and 124, the adjacent 2
Two corners 121, 123 (first corner, third corner)
In addition, roundnesses 121c and 123c are attached to each. These roundnesses 121c and 123c are large roundnesses (curves), unlike the other corners (second and fourth corner portions) 122 and 124. Roundness 121c and Roundness 1
23c has the same size and shape.

The film container 140 has a shape similar to the shape of the X-ray film 120 provided with the two large roundnesses 121c and 123c, and has an outer shape of a predetermined size. Therefore, the film container 140 also has its four corners 141, 142, 143.
And 144, respectively corresponding to the first corner 121 and the third corner 123 of the X-ray film 120 to be stored, the corners 141 (first corners) and the corners 143, respectively. (Third
Corners) and rounded portions 141c and 143c. These roundnesses 141c and 143c are large roundnesses (curves) unlike the other corners (second and fourth corner portions) 142 and 144. The roundness 141c and the roundness 143c have the same size and shape.

First type dental X-ray film body 10
1-while the standard type X-ray film body 500 of FIG. 1B has a symmetrical shape in all directions in the figure-as shown in FIG. 1A-in FIG.
The X-ray film body 110 and the film storage body 130 of the first type have roundnesses 111c and 131c, respectively.
As shown in FIG. 1A as a result of providing the corners 111 and 131 with
Regarding the line along the longitudinal direction (the one-dot chain line that crosses the center in the lateral direction), both have asymmetric shapes on both sides of the line (vertical direction in the drawing).

The first type dental X-ray film body 101 having such a shape is suitable for X-ray photography of the left and right molars of the upper and lower jaws and the vicinity thereof. This first type, as shown in FIG.
The side having 31c (the front side that is largely curved) is arranged in the front (the front of the oral cavity), and the opposite side (the side of the second corners 112 and 132) is the rear (the back side of the oral cavity). )
It can be used by placing it in the oral cavity so that it can be placed on. However, as will be described later, the user can also apply the first type to the X-ray imaging near the canine. In addition to the roundness 111c and 131c, the second corners 112 and 132, which are located on the inner side of the oral cavity, are rounded (first
111c, 131 provided on the corners 111, 131 side of the
It is also possible to adopt a configuration in which a roundness smaller than c) is provided.

In contrast to the first type, the second type dental X-ray film body 102 has a structure in which a pair of rounded portions having the same size and shape are provided at both adjacent corner portions. Therefore, as shown in FIG. 2, this is symmetrical in the left and right in the figure (asymmetric in the upper and lower sides in the figure). X-ray film body 1
20 is a symmetric roundness 1 in both figures at both corners 121 and 123.
21c and 123c, the film storage unit 140 has the left and right symmetric roundness 141c and 1 at both corners 141 and 143.
43c is provided. Therefore, the X-ray film body 120 and the film storage body 140 of the second type are each related to the line along the longitudinal direction (one-dot chain line crossing the central portion in the lateral direction) shown in FIG. Also has a symmetrical shape on both sides of the line (left and right direction in the figure).

Therefore, the second member having such a shape
The dental X-ray film body 102 of this type is suitable for use in X-ray photography of the anterior teeth of the upper and lower jaws or the vicinity thereof. As shown in FIG. 2, the second type is placed in the oral cavity so that the side having the pair of roundnesses 121c, 123c, and 141c, 143c is located inside the oral cavity (on the oral floor side or the hard palate side). It can be placed and used. Further, this second type can be applied to X-ray imaging near the canine.

Roundness 11 in the first type as described above
1c, 131c, and roundness 12 in the second type
1c, 123c, 141c and 143c are respectively X
At the time of radiographing, it is useful for suppressing or preventing the bending of the X-ray films 110, 120 in the film housings 130, 140, and also for relieving or reducing pressure pain (compression pain) given to the inner surface of the oral cavity. . Of the roundness 111c, 131c in these first types and the roundness 121c, 123c, 141c, 143c in the second type,
Each desired curve can be a curve that matches the shape of the inner surface of the oral cavity, corresponding to the region to be imaged.

Such features, advantages, and other features, advantages, etc. of the present invention can be further explained as follows with reference to FIGS. 3 to 18. 3 to 18 are diagrams for explaining the principle, features, and the like of the present invention using a model representing the inside of the oral cavity. FIG. 3 is an overall bird's-eye view of the lower part of the oral cavity of the lower jaw seen from slightly behind the lower jaw, and FIG.

FIG. 5 shows a standard type dental X-ray film body (5) as a comparative example in photographing the right lower jaw (molar portion).
(00) is a diagram for explaining the conflicting state of the front corner portion,
FIG. 6 is a diagram showing an example of a mounted state of a dental X-ray film body suitable for photographing a molar portion or its vicinity according to the present invention on the right side of the lower jaw.

FIG. 7 shows the hard palate part of the upper jaw part as a whole, and the lower edge and front side part of the ideal shape-compatible dental X-ray film body according to the present invention on the left side of the upper jaw. 9 is a diagram showing a normal position (appropriate position) of FIG.
FIG. 8 is a diagram showing an example of a mounted state of a dental X-ray film body suitable for imaging a molar or the vicinity thereof according to the present invention with respect to the normal position of FIG. 7 on the upper jaw left side.

FIG. 9 is a diagram showing an example of a mounted state of a dental X-ray film body suitable for photographing a molar portion or its vicinity according to the present invention on the right side of the upper jaw, and FIG. 10 is a comparative example on the right side of the upper jaw. Of the standard type dental X-ray film body (500) for explaining the contact state of the front corner portion,
FIG. 11 and FIG. 11 are diagrams showing an example of a mounted state of a dental X-ray film body suitable for imaging a molar or the vicinity thereof according to the present invention on the right side of the upper jaw, including the relationship with the tooth alignment.

FIG. 12 is a diagram showing an example of film bending of a standard type dental X-ray film body (500) on the right side of the upper jaw, and FIG. 13 is a comparison example on the right side of the upper jaw. It is a figure which shows the example of the film bending of the standard type | mold dental X-ray film body (500).

FIG. 14 shows a standard dental X-ray film body (5) as a comparative example on the anterior side of the upper jaw (front tooth image).
00) showing an example of film bending, FIG. 15 is a view showing an example of film bending of a standard type dental X-ray film body (500) as a comparative example on the upper jaw side, and FIG. FIG. 6 is a diagram showing an example of a mounted state of a dental X-ray film body suitable for imaging an anterior tooth portion or its vicinity according to a reference example of the present invention on the upper jaw side.

FIG. 17 shows a standard dental X-ray film body (5) as a comparative example in photographing the vicinity of the upper right canine.
00) film warp example; and
FIG. 18 is a diagram showing an example of a mounted state of the dental X-ray film body according to the present invention in the vicinity of the upper right canine tooth.

[FIG . 3, FIG. 4; Bird's-eye view from the rear of the lower jaw] Referring to FIG . 3, a state inside the oral cavity on the side of the lower jaw 10 is shown. The lower jaw 10 includes an anterior tooth portion 11, a left molar portion 12,
And a right molar portion 13. The bottom 15 of the oral cavity is surrounded by the front tooth portion 11, the left tooth portion 12, and the right tooth portion 13. A tongue ridge 16 that hangs on the lower surface of the tongue (not shown) is present at approximately the center of the floor 15 of the oral cavity.

In the figure, "front" indicated by an arrow,
The notations "rear,""left," and "right" are directions in the subject themselves. This point is the same in each of the drawings described later (particularly, FIG. 7 and subsequent figures showing the upper jaw side, or FIG. 28 showing the common form of the upper and lower jaws). "Post" means behind the oral cavity.

In the figure, 2 attached to the portion of the right molar 13
The chain line indicates the tooth arrangement 20 of the molar portion 13. Taking as an example the case where X-ray imaging is performed on the right molar portion 13 and the vicinity thereof, the right molar portion 13 and the tongue small band 1
The dental X-ray film body is placed in the portion of the bottom 15 of the oral cavity between 6 and 6. Here, as shown in the bottom view of FIG. 3, basically, it is desirable that the tooth arrangement 20 and the film position (lower edge) are parallel, and the tooth arrangement 20 and the film surface are parallel. Is a desirable condition.

A typical standard dental X, shown in FIG. 1B.
In the case of the line film body 500, the parallel relationship between the built-in film 510 and the tooth arrangement 20 can be maintained in the rear side portion. However, as shown in the bottom view of FIG.
At 5 (515), the parallel relationship is lost. Because the outer shape is rectangular, the four corners 515 of the X-ray film 510 and the four corners 535 of the film container 530 are rectangular.
Both of them are the oral mucosa surface 17 near the mandibular tongue ridge 16.
This is because it does not correspond to the morphology-the morphology illustrated as the line 18 in the upper view and the lower view in FIG. 4, respectively, and does not correspond to the morphology in the oral cavity.

Therefore, as shown in the lower part of FIG. 4, a deformation-a "warp" toward the front side of the paper surface in the drawing-is caused. Therefore, also in the front lower corner portion 535 (515) and its peripheral portion, the parallel plane relationship is broken. Such deformation causes bending of the X-ray film 510 and causes a flow of an image.

In particular, the subject is an X-ray film body 500.
If you try to hold the
12 and 13), such a phenomenon becomes more remarkable. If such a phenomenon hinders accurate measurement on an image, it becomes difficult to meet such a request when accurate quantitative analysis based on an X-ray image is required. As a result, it also becomes a factor that makes such accurate measurement impossible.

[FIG . 5: Lower jaw right anterior angle, conflict] FIG. 5 shows such a lower right jaw and the front corner portion 53 of the X-ray film body 500 when the standard dental X-ray film body 500 is used.
A conflict with 5 (515) is shown. In this case, it can be seen that the front corner portion 535 (515) hits the oral floor mucosal surface 17 near the mandibular tongue zonule 16 and pressurizes the oral floor mucosal surface 17. As a result, the lower front corner portion 535 (515) of the film causes compression pain.

[FIG . 6; lower jaw right, X-ray film body of the present invention]
Wearing] In contrast, as shown in FIG. 6, according to a dental X-ray film and dental X-ray film in accordance with the present invention,
It can be seen that the front lower corner of the film can be rounded and set to the normal position. Also, conflicts as shown in FIG. 5 can be avoided. Here, the normal position is an appropriate position where the X-ray film pack containing the film is as parallel as possible to the tooth alignment 20 (FIG. 3) of the imaging region and can maintain a planar relationship. The film will not bend if the planar relationship can be maintained as much as possible. Therefore, in the case of FIG. 6, it is possible to prevent film bending as much as possible and to perform accurate X-ray imaging. Also, the tenderness given to the subject can be reduced. 1 and 2
According to the basic configuration of the present invention, the X-ray film to be used and each of the storage containers thereof have even angles so that they can be set to a more accurate intraoral position by rounding the place where tenderness occurs during X-ray photography. It is possible to form a form that does not conflict with. The dental X-ray film body 100 shown in FIG.
It is a first type (101) suitable for photographing the posterior part and its vicinity shown by A. This first type has an asymmetrical shape. By providing the first corner 131 (111) with a roundness 113c (111c) that conforms to the shape of the mucous membrane surface 17 of the floor of the mouth near the mandibular tongue zonule 16—line 18 of FIG. 4—, the lower portion of FIG. It can be seen that the occurrence of the "warp" as shown in the figure is eliminated, and the bending of the X-ray film 110 can be avoided. If the shape of the X-ray film body 101 fits the shape of the inner surface of the oral cavity in the vicinity of the part to be positioned, it is better than the standard dental X-ray film body 500 even when pressed and held with a finger at the time of photographing. Moreover, it is possible to prevent the film surface from being bent. At the same time, it is possible to avoid the occurrence of compression pain as in the case of FIG. Therefore, this first type of dental X-ray film body prevents bending of the film surface when it is pressed and held with a fingertip by adopting a shape corresponding to a complicated jaw shape (hence, image Can be prevented from flowing and becoming unmeasurable) and, for example, the mandibular tongue ridge 1
By adding a roundness 113c (111c) similar to the anatomical shape to the even angle of the film that presses the oral bottom mucosal surface 17 near 6, there is an advantage that the tenderness generated on the oral bottom 15 at the time of imaging is released.

[FIG . 7: Upper jaw left, film normal position] FIG.
Shows the intraoral state on the side of the upper jaw 30. The upper jaw 30 has an anterior tooth part 31, a left molar part 32, and a right molar part 33. The hard palate 35 includes the front tooth portion 31, the left tooth portion 32,
And is surrounded by the right tooth portion 33. Hard palate 35
Has a substantially dome shape. Therefore, the anterior mucosal surface 38 is inclined toward the inner side of the oral cavity of the hard palate 35-in the figure, the inner side of the oral cavity is lower (the actual inner surface of the oral cavity is higher on the inner side of the oral cavity).

In the figure, the line 38 attached to the portion on the upper left molar side 32 has a desirable and proper setting position and shape of the upper edge of the film and the front side corresponding to the form of the hard palate 35. It represents. Therefore, this upper jaw 3
In the case of the shape of 0, in the X-ray photography of the upper molars, the dental X-ray film and the dental X-ray film body to be placed in the oral cavity should have roundness as shown by the line 38. You can see that you can shoot accurately.

[FIG . 8: Upper jaw left, of the X-ray film of the present invention]
Mounting in Normal Position] As shown in FIG. 8, according to the dental X-ray film and the dental X-ray film body according to the present invention,
This is possible. As shown in FIG. 8, the part that contacts the anterior mucosal surface 37, that is, the lower front corner of the film (the lower corner in the figure, but in the actual dental practice, the application site is the upper jaw 30 side, the upper corner Part) can be rounded and set to the normal position. If a properly rounded film fits, it will not bend. The dental X-ray film body 100 shown in FIG. 8 is also suitable for photographing the posterior part or its vicinity,
The first type (101) can be used. It is possible to avoid the bending of the X-ray film 110 by providing the first corner portion 131 (111) with a roundness 113c (111c) that conforms to the form of the hard palate portion 35-the line 38 in FIG. Recognize. In addition, the standard dental X-ray film body 50
Conflicts such as the 0 case (FIG. 10) can also be avoided. Therefore, also in this case, the same effects as those described in the section [FIG. 6; lower jaw, right, mounting X-ray film of the present invention] are obtained.

[FIG . 9: Upper jaw right, of the X-ray film of the present invention]
Mounting in Correct Position] The X-ray photography of the right molar part 32 of the upper jaw 30 also follows the case of FIG. Similarly, as shown in FIG. 9, the first corner 131 of the first type 101 is formed.
With the proper roundness 113c (111c) of (111),
The same effect can be obtained.

[FIG . 10; Upper Anterior Right Anterior Horn, Contact] FIG.
The case of radiography of the upper right molar region using the standard dental X-ray film body 500 is shown. As shown in FIG. 10, in the case of the standard dental X-ray film body 500, the film front upper corner portion 535 (515) (the lower corner portion in the figure) portion hits the front mucosal surface 37 of the hard palate 35. , Cannot set to the proper position. The part with a dot in the lower part of FIG. 10 hinders the setting at an appropriate position, and becomes a factor that hinders accurate shooting. Therefore, it is better to have a shape in which this portion is removed.

[FIG . 11: Upper jaw right, X-ray film body of the present invention]
Mounting to the normal position] On the other hand, as shown in FIG.
In the case of right maxillary radiography, like the first type dental X-ray film body 101, a portion corresponding to the anterior mucosal surface 37 of the hard palate portion 35-that is, the first corner portion 131 (111)-,
It can be seen that when the roundness 113c (111c) is provided, the parallel plane relationship (normal position) can be maintained in the tooth arrangement 40 (two-dot chain line in FIG. 11). Therefore, for the same reason as described with reference to FIGS. 7 and 8, when a properly rounded film fits, X
The bending of the line film 110 can be avoided, and the conflict as shown in FIG. 10 (FIG. 10) can also be avoided. Therefore, also in this case, the same effects as those described in the section [FIG. 6; lower jaw, right, mounting X-ray film body of the present invention] are obtained.

[FIGS. 12 and 13; right upper jaw, film bowl
Bending] FIG. 12 and FIG. 13 are views particularly for considering the phenomenon of film bending caused by holding pressure contact with the finger of the subject. Referring to FIG. 12, a state of bending that occurs when a subject presses and holds the back surface of the X-ray film body 500 with a fingertip at the time of photographing with the standard dental X-ray film body 500 is shown. There is. As shown in the upper view of FIG. 12, the standard dental X-ray film body 500 is set on the right side of the upper jaw 30 and held by the subject's finger.

The present standard type dental X-ray film body 5
In No. 00, there is no means for effectively protecting the X-ray film 510 from such bending (distortion, distortion) by the subject's fingers. Therefore, since there is no effective means for preventing such bending, the built-in X-ray film 510 is easily deformed by pressure contact as shown in the upper diagram of FIG.
Then, as shown in the lower part of FIG. 12, the X-ray film body 500 is bent and the image flows, resulting in a portion 510E that cannot be analyzed. The "flow of images" is likely to appear remarkably particularly in the periphery of the screen, especially in the peripheral portions (535, 515) which are easily touched as described in FIG.

FIG. 13 is a diagram showing the curved state from different angles. In the current system, the pressure analysis with the finger causes the X-ray film surface to be curved and the image to flow, which makes the quantitative analysis inaccurate. Therefore, it turns out that it is not suitable for the analysis that requires accuracy.
Such warping (strain, distortion) caused by holding pressure contact from the back side of the X-ray film pack with built-in film is
The same occurs in the X-ray photography of the front tooth side.

[FIGS. 14 and 15: Upper jaw center, film wagon
Curve] In the current system, X in the molars and its vicinity
In the case of radiography (Figs. 5, 10, 12, and 13)
Also, the X-ray imaging of the front tooth part and its vicinity depends on this type of standard dental X-ray film body 500.
Referring to FIG. 14, the imaged region by the standard type dental X-ray film body 500 in this case is the front tooth part 31 of the upper jaw 30.
It is the central part of (FIG. 7). The inner surface of the hard palate 35-as described with reference to FIG. 7, this surface is the inner surface of the hollow dome shape-in the short side portion 530-2 (510-510-) of the standard dental X-ray film body 500. 2) is applied. In this case, most of the short side portions 530-2 (510-2) are
Both corners 535-2 (515-2), 535-2 (5
Only two points of 15-2) first hit the inner surface of the hard palate portion 35. Therefore, the subject further tries to press and hold the X-ray film body 500 with a finger from such a state as shown in the figure. Then, it can be seen that distortion occurs when the finger is pressed and held. Figure 15
Similarly shows a curved surface when held by a finger.

[FIG . 16: Central upper jaw, X-ray film of the present invention
Body Attachment] On the other hand, as shown in FIG. 16, according to the dental X-ray film and the department X-ray film body according to the reference example of the present invention, roundness should be given to both corners of the lower side of the film (lower side in the figure). Thus, when photographing the upper anterior tooth, it is possible to avoid distortion of the bending while maintaining the parallel relationship.

Dental X-ray film body 10 shown in FIG.
0 is a second type (102) suitable for imaging the front tooth portion or its vicinity shown in FIG. The second type is a dental X-ray film body 100 of a type having a pair of rounded portions having symmetrical shapes. Therefore,
A pair of roundnesses 141c (121c) and 143c (matching the form of the hard palate 35 are provided on both the first corner portion 141 (121) and the third corner portion 143 (123) that are adjacent in the short side direction. By providing 123c), the shape of the inner surface of the hard palate portion 35, which is substantially dome-shaped, is fitted. As a result, it is possible to avoid the state where the corners hit at only two places as in the case of FIGS. 14 and 15, and it is possible to avoid the distortion of the bending as shown in FIG. In this way, the shape of the X-ray film body 102 is such that the inner surface of the oral cavity (the hard palate portion 3) near the portion to be positioned.
5 inner surface), even if it is pressed and held with a finger at the time of photographing, the parallel relationship can be maintained as compared with the case of the standard dental X-ray film body 500, so that the film surface can be bent smoothly. Can be prevented. In addition, as much as it fits, the problem of tenderness does not occur.

Therefore, this second type of dental X
Although the line film body has a different structure from the first type (101), basically, the same effect as that described in the above [Fig. 6; lower jaw right, wearing the X-ray film body of the present invention] is obtained. Play. The second type of dental X-ray film body can also prevent bending of the film surface when it is pressed and held with a fingertip by adopting a shape corresponding to a complicated jaw shape. Therefore, it is possible to prevent the image from flowing and becoming impossible to measure, which is suitable for accurate quantitative analysis. In particular, in this second type, a pair of symmetrical rounded portions 141 that approximate the anatomical form of the hard palate portion 35 are formed at both corners of the film applied to the inner surface of the hard palate portion 35.
By attaching c (121c) and 143c (123c), this advantage can be ensured even in front tooth imaging.

According to the present invention, as described above, it is possible to properly use the first type (101) and the second type (102) according to the region to be imaged.
This first type (101) and second type (102)
Is more effective when these two types are prepared and selectively used, and therefore, such optimum use brings higher form compatibility.

[FIG . 17: Upper Canine Tooth, Film Curvature] FIG. 17 shows a state of X-ray photography of the canine vicinity 31 a of the upper jaw 30 by the standard dental X-ray film body 500. The canine vicinity 31a is a corner portion (corner portion) of the tooth alignment arch. Also in this case, the standard dental X-ray film body 5
According to 00, bending occurs as shown.

[FIG . 18: Maxillary canine, X-ray film of the present invention
Example of body wearing] On the other hand, the dental X-ray film and the dental X-ray film body according to the present invention can appropriately cope with such an X-ray imaging. FIG. 18 shows an example of this correspondence. In the figure, the arrow coming from the upper left side is X
Indicates the radiation direction of a line (beam). According to the present invention, in the case of X-ray photography of the canine vicinity 31a corresponding to the corner of the tooth alignment arch 41 as shown in FIG. 18, the following selection is also possible.

That is, in this case, the both-sided corners 141c (121c) and 143, which are suitable for the above-described front tooth imaging, are used.
Second type X-ray film body 1 with c (123c)
02 (FIG. 16) or, as indicated by a chain double-dashed line in the figure, the first type X-ray film body 101 used for radiographing the lower right molar of the lower jaw described in FIG.
You can prevent bending by using. Both the first type (101) and the second type (102)
To prevent film bending like in the case of Fig. 17,
effective.

Provided according to a first embodiment of the invention,
Roundness 111c, 131c of the dental X-ray film and film container in the first type (101), and roundness 121c, 1 of the dental X-ray film and film container in the second type provided according to the reference example.
Optimal examples of 23c, 141c and 143c are shown in FIGS. 19 and 20. FIG. 19 is a diagram showing a specific example of the optimum type for posterior part imaging of the first type according to the first embodiment of the present invention, and FIG. 20 is a second type according to the reference example of the present invention. FIG. 4 is a diagram showing a specific example of an optimal form for anterior tooth imaging.

The following values (a) to (f) are the dimensions of each part of the first type dental X-ray film container 130 in FIG.

## EQU1 ## (a) LL = 44 mm (B) LS = 33 mm (C) Lp11 = 17mm (D) Sp11 = 13mm (E) Lp12 = 5mm (F) Sp12 = 5mm

Here, Lp12 and Sp12 are the second
The dimension in the case where the rounded portion 132c is provided on the side of the corner portion 132 is also shown. Dental X-ray film body 100 to be stored
Is similar to the outer shape of the film container 130, and thus has a shape that is reduced by a predetermined dimension (for example, 3 mm concentric reduction) from the dimensions (a) to (f). Therefore, in the case of the X-ray film body 100, (a),
The size of each part corresponding to (b) is, for example, 1.5 mm each in the vertical and horizontal directions,
LL-1.5 mm-1.5 mm = 41 mm, LS-1.
5 mm-1.5 mm = 30 mm. Also, similarly,
The dimensions of each part corresponding to the above (c) to (f) are also
It is optimal to use a value reduced by the same ratio.

Further, in FIG. 20, the dimensions of each part of the second type dental X-ray film container 140 are as shown in the following (g) to (k).

[Formula 2] (g) LL = 44 mm (H) LS = 33 mm (I) Lp20 = 27mm (J) Sp21 = 11mm (K) Lp23 = 11 mm

Similarly, the dimensions of the respective portions of the second type X-ray film body 140 corresponding to the above (g) to (k) are also values reduced in the same ratio as the above first type. Is optimal.

The above (c) to (f) and (i) to
(K) and the curves of each roundness are the optimum values and curves found by the inventor as a result of the experiment, and good results were obtained. The sizes and shapes in FIGS. 19 and 20 are examples of numerical values when the present invention is applied, in terms of size, for the standard type (FIG. 1B). However, the present invention also applies to pediatric types,
It goes without saying that the same applies to the same.

Another embodiment of the present invention will be described with reference to FIGS.
Will be described. FIG. 21 is a diagram for explaining a dental X-ray film body having a sheet-like light shielding material and a sheet-like lead material according to the second embodiment of the present invention. Type of dental X for photographing posterior teeth
FIG. 22, which also shows the process of manufacturing the linear film body,
It is a figure similar to FIG. 21 in the case of the dental X-ray film body for anterior tooth imaging of the 2nd type based on this 2nd Example, and FIG. 23 is this 2nd Example. It is a figure which expands and shows the cross section of the dental X-ray film body which concerns. In FIG. 23, the dimension in the thickness direction is exaggeratedly drawn. Therefore, the shape shown in FIG. 23 is actually a thin, flat shape in the longitudinal direction (this point is the same in FIGS. 24 and 25).

In this embodiment, a sheet-shaped light shielding material (light-shielding paper) and a sheet-shaped lead material having the same shape as the shape-compatible dental X-ray films 110 and 120 described in the first embodiment. (Lead foil) is used. These are the corresponding dental X-ray films 110 of their first or second type.
Or with 120, the corresponding first or second
Type dental X-ray film housing 130 or 14
It is built in 0.

21 and 22, reference numeral 1
Reference numerals 170 and 180 denote light-shielding paper as a sheet-shaped light-shielding material, and reference numerals 170 and 180 denote lead foils as a sheet-shaped lead material. As shown in FIG. 21, the lead foil 170
Are formed to have the same shape as the first type dental X-ray film 110. Therefore, the first, second, third and fourth corner portions 171 of the lead foil 170,
First corner 171 of 172, 173 and 174
The roundness 171c of the first corner 1 of the X-ray film 110 is
11 is the same as the roundness 111c. As shown in FIG. 22, the lead foil 180 is formed to have the same shape as the second type dental X-ray film 120.
Therefore, the first, second, third and fourth lead foils 180 are
Of the corners 181, 182, 183, and 184 of the first corner 181 and the third corner 18
The roundness 183c of 3 is the X-ray film 120, respectively.
This is the same as the roundness 121c of the first corner 121 and the roundness 123c of the third corner 123.

In the first type, the correct positional relationship between the dental X-ray film 110 and the lead foil 170 in the dental X-ray film container 130 is as shown in the left part of FIG. 21 and FIG. , The front portion 13 of the film container 130
The X-ray film 110 is located on the 6 side—the side applied to the imaging site (eg, the lower left molar) —and the back surface 137 side of the film housing 130—the lid 138 indicates the arrow [F]. It should be arranged so that the lead foil 170 is located on the side to be closed. Because, if not, in the X-ray irradiation direction, X-ray film 1
This is because 10 is located behind the lead foil 170. Then, in this case, normal X-ray imaging of the imaging region is not performed.

This point also applies to the second type. Therefore, as shown in the left part of FIG. 22 and FIG. 23, the X-ray film 120 is located on the front part 146 side of the film container 140-the side applied to the imaging site (for example, the lower jaw anterior part), and, Film storage 140
Is arranged so that the lead foil 180 is located on the back surface 147 side-the side closed by the lid 148 as indicated by the arrow [F]. In FIG. 23, the corresponding elements on the second type side are denoted by reference numerals in parentheses (this point is the same in FIGS. 24 and 25).

The shading paper 150 applicable to the first type (101) has a shape as illustrated in FIG.
It consists of one piece of paper 150a, 150b, and 150c. However, the X-ray film 110 and the lead foil 170 are
For the purpose of holding between the strips, the shading paper 150 includes at least two strip portions (eg, 15 strips) of it.
Only the 0a and 150b portions or the 150b and 150c portions are sufficient (this point is the same in FIG. 22). These three paper piece portions 150a, 150b, and 150c are connected, and finally, as shown in FIGS. 21 and 23, they are folded in three layers.

The paper piece portion 150a constitutes the base portion (first layer portion) of such a three-layer light-shielding paper sheet. Piece of paper 150
b and 150c respectively constitute a folded portion (second layer portion, third layer portion). As shown in the upper part of FIG. 21, the three-layered light-shielding paper 150 has first, second, third, and fourth corner portions 151, 152, 153, and 154, one of which is the first corner. The portion 151 has the same roundness 151c as the roundness 111c of the first corner portion 111 of the X-ray film 110.

Therefore, the central piece 150a of paper is
As shown, the first, second, third and fourth portions 15
0a-1, 150a-2, 150a-3, and 150
a-4, and the shape of the paper piece portion 150a is set to the same shape as the X-ray film 110 and the lead foil 170.

Paper piece portion 150b of the folded portion on the right side of the drawing
Is the first, second, third and fourth portions 150b-1,
150b-2, 150b-3, and 150b-4. These parts are set so as to have a symmetrical shape with each part of the paper piece part 150a with respect to the fold line (broken line) on the right side in the drawing. Therefore, the paper piece portion 150
When b is folded back, it has the same shape as the X-ray film 110 and the lead foil 170. Similarly, the first, second, third and fourth portions 150c-1, 150c-2, 150c-3, of the paper piece portion 150b of the folded portion on the left side in the drawing,
And 150c-4 are also set so as to have a shape symmetrical to the paper piece portion 150a with respect to the fold line (broken line) on the left side in the drawing. Therefore, the paper piece portion 150c also has the same shape as the X-ray film 110 and the lead foil 170 when folded back (FIG. 21, upper part).

The configuration of the light-shielding paper 160 applicable to the second type (102) also conforms to the above. The shading paper 160 has three paper piece portions 1 having a shape as illustrated in FIG.
It consists of 60a, 160b, and 160c. The paper piece portion 160a constitutes the base portion (first layer portion) of such three-layer light-shielding paper. The paper piece portions 160b and 160c respectively constitute folded portions (second layer portion and third layer portion).
As shown in the upper part of FIG. 22, the light-shielding paper 160 in the three-layered state has the first, second, third, and fourth corner portions 161, 16.
2, 163, and 164. Its first corner 1
61 and the third corner portion 163 respectively have a roundness 121c and a third corner portion 121c of the first corner portion 121 of the X-ray film 120.
Roundness of the corners 123 of the same 123c The same roundness 161
c and 163c.

Therefore, the central paper piece portion 160a is
As shown, the first, second, third and fourth portions 16
0a-1, 160a-2, 160a-3, and 160
a-4, and the shape of the paper piece portion 160a is set to the same shape as the X-ray film 120 and the lead foil 180.

The paper piece portion 160b of the folded portion on the right side in the figure
Is the first, second, third and fourth portions 160b-1,
160b-2, 160b-3, and 160b-4. These portions are set so as to have a symmetrical shape with each part of the paper piece portion 160a with respect to the fold line (broken line) on the right side in the drawing. Therefore, the paper piece portion 160
When b is folded back, it has the same shape as the X-ray film 120 and the lead foil 180. Similarly, the first, second, third and fourth parts 160c-1, 160c-2, 160c-3, of the paper piece part 160b of the folded-back part on the left side in the drawing,
And 160c-4 are also set so as to have a symmetrical shape with the paper piece portion 160a with respect to the fold line (broken line) on the left side in the drawing. Therefore, the paper piece portion 160c also has the same shape as the X-ray film 120 and the lead foil 180 when folded back (the upper part of FIG. 22).

[0087][FIG. 21: First type manufacturing process]
[A]-[F]]First type dental X-ray film body
The manufacturing of 101 is a dental X-ray provided with a roundness 111c.
Film 110 and light-shielding paper 15 with a shape corresponding to it
0 and the lead foil 170, [A] shown in FIG.
As in [F], it can be performed appropriately.[A] Process The lead foil 170 is attached to the paper piece portion 150a at the center of the shading paper 150.
Place them so that their shapes match.

[B] Process The paper piece portion 150b on the right side of the shading paper 150 in the drawing is attached to the lead foil 1
Fold over 70. As a result, as shown in the left part of FIG. 21 and FIG. 23, the lead foil 170 is arranged between the first layer portion 150a and the second layer portion 150b of the light shielding paper 150, and is securely held. (Conversely, the paper piece portion 150b on the left side in the drawing may be folded back first).

[C] Process The X-ray film 110 is applied to the second layer portion 1 of the light shielding paper 150.
It arrange | positions so that shape may be matched on 50b (The order of [A] and [C] may be reversed).

[D] Step The left piece 150c of the light-shielding paper 150 is folded on the X-ray film 110. Thereby, as shown in the left part of FIG. 21 and FIG. 23, the X-ray film 110 has the second layer portion 150 b and the third layer portion 150 of the light shielding paper 150.
It is arranged between b and and is securely held.

Here, if the first corner 111 is rounded
11c does not match the shape of the X-ray film 110,
For example, when a rectangular lead foil is used, the excess portion of the lead foil is -3 stacked over the outer shapes of the first portions 150a-1, 150b-1, 150c-1 of the paper piece portions 150a, 150b, 150c. The first corner portion 151 of the light-shielding paper in this state exceeds the roundness 151c portion-and protrudes outside thereof. Therefore, the protruding flexible lead foil portion does not finally fit into the roundness 131c of the first corner portion 131 of the film container 130 during the insertion of the next step [E], resulting in In the film container 130, a part of the first corner portion 111 of the X-ray film 110 is hidden-that is, a part of the X-ray film 110 is behind the lead foil- May be folded. This interferes with normal radiography. On the other hand, in the present embodiment, the shading paper 150 and the lead foil 170 to be applied are applied.
Is a roundness 1 of the same shape as the roundness 111c of the X-ray film 110.
51c (150a-1, 150b-1150c-1),
171c. Therefore, as described above, the lead foil 170 and the X-ray film 110 can be securely held, and the problem of such protrusion can be avoided, and the normal X
It is possible to secure line photography.

[E] Process The set of the X-ray film 110, the lead foil 170, and the light-shielding paper 150 in the three-layered state in the upper part of FIG. 21, which holds them, is inserted into the film container 130. At this time, as shown by the broken line in the upper part of FIG.
As a result of being able to insert by aligning the rounded portions 131c with each other, it is possible to avoid erroneous storage (erroneous insertion, manufacturing error) such as inserting from the opposite side (the second and fourth corner portions 152, 154 side). Therefore, it can be arranged at the correct position in the film container 130. In the first type of the present invention, the roundness 111c and the roundness 151c (150a-
1,150b-1150c-1), and roundness 171c
Also has a feature of providing a secondary effect that enables such proper alignment.

[F] Step The lid 138 is closed, and the X-ray film 110, the lead foil 170,
The set of light-shielding paper 150 is bonded so as to be enclosed inside. As described above, a good product of the first type dental X-ray film body 101 can be obtained.

[0094][FIG. 22: Second type manufacturing process]
[A]-[F]]Second type dental X-ray film body
The manufacturing of 102 is similar to the case of FIG.
Dental X-ray film 12 provided with 21c and 123c
0 and light-shielding paper 160 and lead foil having a shape corresponding to 0
180 and the like [A] to [F] shown in FIG.
Can be done appropriately. So in this case
Also in the above [FIG. 21; manufacturing process of the first type [A].
The same effects as those described in the section [F] are obtained.

FIG. 24 shows still another embodiment of the present invention. FIG. 24 is a view showing a dental X-ray film body including a plate body for preventing bending according to the third embodiment of the present invention. This plate for preventing bending is introduced from the following viewpoint. Subject (patient) at the time of oral radiography
It is customary to hold the back surface of the film by holding it with your own fingers. However, in that case, the film is warped, the image around the image flows, and the image tends to be inaccurate. As already shown in FIG. 12 to FIG. 15 and FIG. 17, in the case of the standard dental X-ray film body 500, in order to come into contact with a complicated shape in the oral cavity and to hold the pressure contact with the finger of the subject, In a standard dental X-ray film body 500 that does not have effective anti-curl means-the film 510 will curl and the image will be inaccurate. Therefore, in order to prevent this, in the present invention, the bending prevention plate is attached.

According to the present invention, this means for preventing bending is
The present invention can be applied to any of the first and second types in the first and second embodiments. In this embodiment, a morphological holding plate is further added to the first type or second type dental X-ray film container 130 or 140 according to the second example shown in FIGS. 21 to 23. It is carried out according to the aspect.

In FIG. 24, reference numeral 210 indicates this bending prevention means. This is provided on the back surface of the film housing body 130 for the purpose of preventing the built-in dental X-ray film 110 from bending and image deletion in the first type dental X-ray film housing body 130. Further, it is the backing plate 210 as a shape holding plate. This backing plate 210 is used as a plate body for the subject to apply and press when holding the film container 130 in the oral cavity.

The backing plate 210 has a structure that is less likely to bend than the X-ray film 110.
For example, the plate 210 has a predetermined thickness (for example, 0.5 mm).
(Thick) plastic plate. Thereby, the bending of the X-ray film 110 can be favorably prevented.

In a preferred embodiment, the plate 210 further has a protrusion 216 at or near the center of the plate body on which the fingertip of the subject touches, as shown in FIG. As a result, it is possible to easily hold the subject in pressure contact. However, it goes without saying that this is not limited to the convex shape. The form is not limited to a single form.

As shown in FIG. 24, the backing plate 210 is, for example, the lid portion 13 of the back surface portion 137 of the film container 130.
It can be attached to the portion 8 by adhering it by adhesion or the like. The backing plate 210 is installed on the back side of the film container 130 so as to correspond to the shape of the entire built-in X-ray film 110.
preferable. Therefore, the backing plate 210 has a shape similar to the outer shape of the film container 130, and has a smaller size by a predetermined size. An example of the preferable shape of the backing plate 210 and the arrangement of the protrusions 216 in the first type dental X-ray film body 103 with the backing plate according to this embodiment is shown in FIG.
B. The shape of the backing plate 210 is selected to be a shape that is concentrically reduced from the outer circumference of the film container 130 by a predetermined dimension (for example, 3 mm).

The above structure is similarly applied to the second type dental X-ray film housing 130 to obtain the second type dental X-ray film body 104 with a backing plate. be able to. In FIG. 24, reference numerals 220 and 226 in parentheses indicate the backing plate and the protrusion of the second type dental X-ray film body 104 with the backing plate, respectively. An example of a preferable shape of the backing plate 220 and an arrangement of the protrusions 226 in that case is similarly shown in FIG. 27B. The shape of the backing plate 220 is a predetermined dimension (for example, 3 mm) from the outer periphery of the film container 140.
The shape is selected to be concentric.

According to the dental X-ray film body 103 (104) with a backing plate of the present embodiment, a plastic plate having a predetermined thickness, in which the protrusion 216 (226) is attached to the part where the fingertip of the subject touches, Form holding plate 210 (220) that is concentrically reduced by a predetermined length from the outer circumference of the film container 130 (140)
As a result, by further adding, it is possible to prevent the bending of the form-corresponding dental X-ray film 110 (120) of the present invention even more than in the first or second embodiment. At the same time, it has a feature of facilitating the press-contact holding of the subject by the shape-compatible dental X-ray film container 130 (140) containing the same.

Dental X-ray film body 1 with this backing plate
03 (104), the dental X-ray film body 103 (1) is also determined by the presence or absence of the backing plate 210 (220).
It is possible to easily distinguish the front side and the back side of 04). This is because the lining plate 210 (220) is harder to bend and harder than the front surface portion 136 (146). Therefore, the subject erroneously applies the back side of the dental X-ray film body 103 (104) to the imaged site-in this state, the built-in X-ray film 110.
Since the positional relationship between (120) and the built-in lead foil 170 (180) is reversed and it is not normal, X-ray photography is avoided. Therefore, this backing plate 210 (220)
It has the characteristic of providing a secondary effect that enables prevention of such misuse. In particular, the backing plate 210 (22
0) is provided with a protrusion 216 (226), the protrusion 21
6 (226) is useful for exerting such a secondary effect. In addition, the film container 130 (140)
In the case of the configuration having the lid portion 138 (148) that is folded back to the back side so as to cover the opening portion of the bag-shaped portion that houses the X-ray film 110 (120) as in the present embodiment,
It is also possible to adopt a configuration in which the lid portion is formed so that the lid portion 138 (148) and the backing plate 210 (220) can be used in common.

Still another embodiment of the present invention will be described with reference to FIGS. FIG. 25 is a view for explaining a dental X-ray film body including a backing plate and a reference metal material according to the fourth embodiment of the present invention, and this fourth embodiment
It is a figure which expands and shows the cross section of the dental X-ray film body which concerns on the Example of this invention, and FIG. 26 is based on this 4th Example.
The front view (FIG. A) and the back view (FIG. B) of the first type of dental X-ray film body 105 for photographing molars, and FIG. 27 are related to the fourth embodiment. It is a front view (FIG. A) and a back view (FIG. B) of the second type of dental X-ray film body 106 for photographing anterior teeth.

The mode with the backing plate and the reference metal material according to the present invention is also applicable to any of the first and second types in the first and second embodiments. This embodiment is carried out by adding a reference metal material to the first or second type with a backing plate according to the third embodiment described with reference to FIG.

In the figure, reference numeral 300 represents a reference metal material having a plurality of X-ray film image blackening reference metal portions having different thicknesses. The reference metal material 300 is a plurality of reference metal portions, for example, 4 having different thicknesses.
It has a step-like titanium piece of 5 steps. In this embodiment, as shown in FIGS. 26 and 27, the first, second, third, fourth and fifth reference metal portions 301, 301, 303, 304 and 305 made of titanium metal are provided. .

This reference metal material (titanium piece) 300
Is a reference metal part (titanium piece) 301, 301, 303, 304 and 3 during X-ray photography during dental treatment.
It is provided to allow a quantification of the measurement of the jaw bone density on the basis of the X-ray film image obtained by taking 05 simultaneously.

For this reason, the reference metal material 300 should be positioned so as to be positioned at least on the front side (closer to the X-ray generating portion) than the built-in dental X-ray film in the X-ray irradiation direction.
It must be provided on the line film body. Therefore, this is the first or second type dental X-ray film container 13 represented by reference numeral 300 in FIG. 25, for example.
The inner surface side of the front portions 136 and 146 of the 0, 140 can be the arrangement position.

Thus, as shown in FIGS. 26A and 26B and FIGS. 27A and 27B, respectively, the first type of dental X with backing plate (210) and reference metal material according to this example is provided. In both the X-ray film body 105 and the second type dental X-ray film body 106 with the backing plate (220) and the reference metal material,
The reference metal material 300 is used for the film storage bodies 130 and 140.
Between at least the first or second type of built-in dental X-ray film 110, 120 and the inner surface of the front portion 136, 146 of the film container 130, 140-thus the X-ray film 110. , 120 on the front side. Therefore, at the time of X-ray imaging of the imaging region, the reference metal parts 301 and 30 that have passed through the reference metal material 300
The X-ray images of 1,303,304 and 305 must be
The images of the line films 110 and 120 are simultaneously photographed.

However, the reference metal material 300 may be directly attached to a part of the X-ray films 110 and 120, instead of being attached to the inner surfaces of the front portions 136 and 146 of the film storage bodies 130 and 140, and the light shielding paper 150. , 160 may be attached to the third layer portions 150c, 160c of the film storage body 160, or the front portion 13 of the film storage body 130, 140.
It may be provided on the outer surface of 6,146. In either case, simultaneous shooting is possible.

Each reference metal part 301, 301, 303,
The X-ray images of 304 and 305 compare the degree of blackening of the X-ray image with the degree of blackening of the image of the jaw bone of the imaged site, and when performing quantitative measurement (measurement) and analysis of the jaw bone density, Reference metal parts 301, 301, 30 having different thicknesses
The blackening degree of the X-ray image of 3,304 and 305, which is obtained according to their thickness, is used as a reference. Therefore, the reference metal material 300 needs to be surely imaged on the X-ray films 110 and 120, while it does not interfere with the imaging of the jawbone of the imaging site, and further, as much as possible, such as bending, distortion, and image deletion. It is desirable to be able to secure a situation that is less affected by.

In the first type of this embodiment, as shown in FIG. 26, the reference metal material 300 is the X-ray film 110.
And the roundness 111c, 131 of the film container 130
The first corners 111 and 131 provided with c are arranged at a position slightly inner than the edge position of the X-ray film 110 on the peripheral side far from the first corners 111 and 131, and on the other hand, on the back surface of the film container 130, the film container 130 is provided. There is a backing plate 210 for preventing bending, which has a similar shape to that of the built-in X-ray film 110 and has the same shape as the built-in X-ray film 110.

The backing plate 210, as shown in FIG.
It has two corners 211, 212, 213 and 214.
Among them, the X-ray film 110 and the film container 1
One corner portion (first corner portion) 211 corresponding to the first corner portions 111 and 131 of 30 has a roundness 211c. This roundness 211c is a large roundness (curve), unlike the other corners (second, third and fourth corners) 212, 213 and 214. Then, the protrusion 216 is provided in the substantially central portion of such a shape.

The size of the backing plate 210 is preferably X-ray film 110 as means for preventing film bending.
In accordance with the size of the shape of the film storage body 130, a similar shape having a concentric reduction of 3 mm from the outer periphery of the film storage body 130-a shape reduced by 1.5 mm in each of the top, bottom, left, and right in the figure-is set. As a result, the backing plate 210 has a built-in X-ray film 110.
Can be isomorphic to. Therefore, this backing plate 210 always exists on the back surface side corresponding to the portion of the reference metal material 300 provided at the position shown in FIG. It is also possible to properly avoid the occurrence of bending, and to avoid the influence of image deletion and the like. Therefore, the function of the reference metal material 300 is also ensured.

The same applies to the second type.
As shown in FIG. 27, the reference metal material 300 includes the first and second corner portions 121, 121, 123c and 141c, 143c of the X-ray film 120 and the film container 140 provided with a pair of roundnesses. 123, and 1
41 and 143 are arranged on the peripheral side far from the edge position of the X-ray film 110. The lining plate 220 is
As shown in FIG. 6B, four corners 221, 222, 223
And 224. Among them, X-ray film 120
And the first and second corners 1 of the film container 140
Both corner portions (first and second corner portions) 221, 223 corresponding to 21, 123, and 141, 143, respectively,
It has a pair of roundnesses 221c and 223c. These roundness 2
21c and 223c have large roundness (curves), unlike the other corners (second and fourth corners) 222 and 224. Then, a protrusion 226 is provided in the vicinity of the center of such a shape.

The size of this backing plate 220 is also adjusted to the size of the shape of the X-ray film 120, and the film container 1
It can be set to a similar shape with 3 mm concentric reduction from the outer circumference of 40. As a result, the shape of the backing plate 220 is such that the built-in X-ray film 1
It may have the same shape as 20. Therefore, even if the reference metal material 300 is arranged at the peripheral edge portion, the backing plate 220 always exists on the back surface side corresponding to the portion of the reference metal material 300 at the position shown in FIG. 27A. For this reason,
It is possible to properly avoid the occurrence of bending in the installation portion of the reference metal material 300, and avoid the influence of image deletion and the like.
In this type, the function of the reference metal material 300 is also ensured.

[For the purpose of quantitative measurement of jaw bone density,
Dental film with scale made by LESSON 304,
Or jaw bone density quantitative measurement film] Reference metal material 30
0 is a titanium piece according to the previous proposal (JP-A-6-285059) and its thickness (0.3 mm to 1.3 m).
Although m) may be selected, if the following configuration is adopted instead of this, more effective implementation is possible. In a preferred example, the dental film for dental radiography is used as a metal piece of 4 to 5 grades having different thicknesses, which is used for the purpose of evaluating the jaw bone density as a quantitative value by standardizing the degree of blackening of the image. Stainless steel 304 (stainless steel 304 foil having a predetermined thickness having different X-ray absorption rates) is used.

By using the stepwise stainless steel 304 of 4 to 5 steps having different thicknesses, the X-ray absorptance of each thickness is measured by the amount of transmitted light, and numerically converted to be equivalent to an equivalent value. The bone density of the jaw bone, which indicates the X-ray absorption rate, is displayed by a predetermined thickness value of stainless steel 304 (bone density measuring method).

At the time of X-ray photography, reference metal materials 300 having different normalized thicknesses are attached. The reference metal material 300 is
Using stainless steel 304, it can be clinically provided as "a dental X-ray film with a reference scale, or an X-ray film body". As a result of an experiment by the present inventors, stainless steel 30
Proposal by using No. 4 as a standard for measuring the degree of blackening of an X-ray film (JP-A-6-285059)
It was found that the measurement can be performed over a wide range compared to.

The thickness of the metal foil of stainless steel 304 and the number of steps thereof are 0.08 mm, 0.16 mm, 0.24.
mm, 0.32 mm, and 0.4 mm, each having a total of five levels of thickness are optimal. Here, 0.24 mm ~
Each thickness of 0.4mm is 2 of 0.08mm.
This corresponds to a thickness of 3 times, 3 times, 4 times and 5 times. Therefore, in the configurations of FIGS. 26 and 27, the first, second, third, fourth and fifth reference metal portions 301, 301, 303, 30 of the reference metal material 300 are provided.
4 and 305 are stainless steel 304 of each of these thicknesses.
Can be used.

According to this preferred example, the following features are provided. Compared to the case where titanium pieces having different thicknesses are used as scales, the thickness when using stainless steel 304 is 1/3 or less, so there is little unevenness when attached to the film and the shooting operation is not hindered. Has an advantage.
Moreover, there is an advantage that the material and the processing cost are low. Stainless steel 304 foil used as a scale is one-third the thickness of the case of titanium, and because it can be more effectively measured and can easily cover the metal surface, high-pressure sterilization, use of bactericide, and It can prevent physical and chemical corrosion changes of metals due to gas sterilization. Here, since the metal piece made of 304-stainless steel is already disinfected and sterilized and provided to the clinical guide at any time, it is preferable to use a configuration in which a cover is attached for the purpose of maintaining anticorrosion. Further, since the material and the processing cost are low, the burden is small, even though it is frequently used clinically. On the other hand, as a mode of a dental X-ray film with a disposable scale or a dental X-ray film body in which a metal piece of stainless 304 foil for standardizing the degree of blackening is attached to the dental X-ray film, Can be provided to the user.

FIG. 28 shows a built-in lead foil 18 according to the present invention.
0, backing plate 220 on the back side, built-in reference metal material 300
Of any of, or having at least one of,
FIG. 3 is a schematic diagram for explaining a common mode for a dental X-ray film body of this type. In this example, (i) the imaging site is the upper left molar part 32, or the first type dental X-ray film body for the upper left molar part which is the peripheral part thereof, and the imaging site is the lower right molar part 13, Or the first type of dental X for the lower right molars which is the peripheral part
(Ii) the first radiographic film body of the first type for the upper right molar region 33, or the peripheral part thereof, which is the part to be imaged, and the imaging region is the lower left side of the lower jaw. It is shared with the molar portion 12 or the first type dental X-ray film body for the lower left molar portion which is the peripheral portion 12.

The second type dental X-ray film body 104 or 106 according to the reference example of the present invention described in the second, third and fourth embodiments has a built-in lead. Even in a configuration including the foil 180, the backing plate 220 on the back side, and the built-in reference metal material 300, the dental X-ray film body 104 or 106 having the same structure can realize the oral morphology corresponding to the upper anterior tooth imaging. It can be seen that the method can be directly applied to the two aspects of lower anterior tooth imaging. Therefore, by preparing one type of X-ray film body 104 or 106 for the upper jaw anterior part radiographing and the lower jaw anterior part radiographing, (iii) the upper jaw whose anterior region is the upper anterior part or its peripheral part It is possible to share the one for anterior teeth and the one for lower anterior teeth whose imaging site is the lower anterior tooth portion or its peripheral portion.

On the other hand, in the common mode of FIG. 28, as the first type, the upper left molar and the lower right molar are shared X
Two types of the X-ray film body 105ULLR and the X-ray film body 105URLL shared by the upper right molar and the lower left molar are selectively used. In the figure, a dental X-ray film body 100 (10) for photographing a second type of molars with a backing plate and a reference metal material according to the fourth embodiment is shown.
5 shows an example of four modes of oral radiography of the upper left side, the upper right side, the lower right side, and the lower left side according to 5). In the figure, the hatched parts are respectively
In accordance with the present invention, roundness 111c, 131c, 171c,
And the first corners 111, 13 of the backing plate 210, and the dental X-ray film 110 corresponding to the respective forms, the film container 130, the lead foil 170, and
1, 171 and 211 are shown.

In the figure, for example, the lower jaw 10 as an imaging region
Structure of the X-ray film body 100 applied to the left tooth portion (left molar portion 12) of FIG. , And the relationship between the imaged region and the X-ray irradiation direction. In this case, the relationship between the X-ray film 110 and the lead foil 170 has a correct arrangement relationship as described with reference to FIG. Further, the relationship between the X-ray film 110 and the reference metal material 300 is also the correct positional relationship described in FIG. Further, the subject can press the backing plate 210, and can sufficiently exert its bending prevention function.

If the X-ray film body 100 having this structure is used,
Is assumed to have moved to the left side in the figure as it is and applied to the right tooth portion (right molar portion 13) of the lower jaw 10. At this time, the hatched portions corresponding to the form (roundings 111c, 131c, 171c, and 211
Since the relationship in which c) can be located in the bottom 10 of the oral cavity of the lower jaw 10 does not change, the form correspondence can be satisfied. However, the X-ray film 110 and the lead foil 1
The relationship with 70 is reversed. In addition, the X-ray film 110
The relationship between the reference metal material 300 is also reversed. In this case, the reference metal material 300 is located behind the X-ray film 110, and the image thereof is not captured by the X-ray film 110, so it can be seen that the function of the reference metal material 300 cannot be exhibited. Furthermore, it can be seen that the backing plate 210 for preventing bending cannot also exhibit the function of. However, at this time, the subject can easily notice a mistake in use by hitting the protrusion 216 of the backing plate 210.

Also, if the X-ray film body 1 of this structure is used
It is assumed that 00 is translated to the upper jaw 30 side in the figure and applied to the left tooth portion (left molar portion 32) of the upper jaw 30. At this time, the relationship between the X-ray film 110 and the lead foil 170,
Also, the relationship between the X-ray film 110 and the reference metal material 300 is correct. Therefore, at first glance,
It seems to be shared. However, the hatched portion corresponding to the form (rounded portions 111c, 131c, 17c
1c and 211c) are not located in the hard palate 35 portion of the upper jaw 30. As a result, the form correspondence cannot be satisfied.

On the other hand, the left tooth portion of the lower jaw 10 (the left molar portion 1
When the X-ray film body 100 applied to 2) is turned upside down as indicated by the arrow in the figure and applied to the right tooth portion (right molar portion 33) of the upper jaw 30, the X-ray film 11
0 and the lead foil 170, the X-ray film 110 and the reference metal material 300, and the backing plate 210.
It can be seen that both relationships can be maintained in a normal relationship. Moreover, the hatched portions corresponding to the form (roundings 111c, 131c, 171c, and 21c
It can be seen that 1c) can also be positioned in the hard palate 35 portion of the upper jaw 30 and can satisfy the form correspondence. Therefore, the X-ray film body 100 of this structure is the X-ray film body 105U commonly used for the upper right molar and the lower left molar.
It can be seen that it can be used as RLL.

In light of the relationship similar to the above consideration, FIG.
As shown in FIG. 8, the left tooth portion of the upper jaw 30 (the left molar portion 3
2), and the structure of the X-ray film body 105ULLR applied to the right tooth portion (right molar portion 13) of the lower jaw 10 can be an X-ray film body for both the upper right molar portion and the lower left molar portion. I understand. The structure of this shared X-ray film body 105ULLR is, for example, as shown in FIG. 26A.
This corresponds to a structure in which B and B are mutually symmetrically replaced with each other.

Therefore, according to the present example, the built-in lead foil 170 (180) and the backing plate 21 on the rear surface side according to the present invention.
0 (220) and the structure including three elements of the reference metal material 300, as in the above (i) and (ii), the X-ray film body 105U is the first type.
By preparing two kinds of X-ray film bodies, RLL and X-ray film body 105ULLR, and preparing one kind of X-ray film body 106 as the second type as described above (iii), Three types of X-ray film body 10
By selectively using 5URLL, 105ULLR, 106, the left and right sides of the upper jaw 30 (left and right molar parts 32, 3
3) Imaging, left and right of lower jaw 10 (left and right molars 1
It is understood that the most effective X-ray imaging can be performed in any of these six modes of imaging, that is, imaging of the upper jaw 30 and the lower jaw 10 (anterior tooth portion).
Therefore, if these three types of X-ray film packs with a built-in film are provided to the user, the user can optimally use them properly.

X-ray film according to the present invention (110, 12
0) is applied to a photographing method called a bisection method, and exerts a more advantageous effect.

FIG. 29 schematically shows the principle of the bisection method. In dental practice, select the desired tooth peripheral tissue part 50
When the radiography is performed, the dental X-ray film f is positioned behind the radiographing site (50) -that is, in the oral cavity. Then, X-rays from the X-ray generation unit of the X-ray imaging apparatus are irradiated through the cone unit 70 to perform imaging, and a film image is obtained. The bisector method is an imaging method related to the X-ray irradiation angle in such oral X-ray imaging.

The X-ray film f may be
As shown in the drawing, it may not be possible to position the tooth and the surrounding tissue in parallel or substantially in parallel. Therefore, as shown by the broken line in the figure, the X-ray film f may be in a tilted state (the explanation of the principle of the figure is for an example of imaging of the lower jaw side). As shown in the figure, the bisector method uses the surface F formed by the X-ray film f in the oral cavity.
A method of using the bisector F2 of the f and the vertical axis F1 of the tooth and its surrounding tissues (tooth supporting tissues) as a reference for imaging regardless of the inclination of the X-ray film f. Is. Therefore, this method sets the direction of X-ray irradiation so that the X-ray irradiation (irradiation center line) is perpendicular to the assumed reference plane (F2), as shown in FIG. Is the way to do it.

If the X-ray irradiation center is perpendicular to the long-axis center vertical plane F1 as shown in FIG. 11B, the following phenomenon occurs. That is, the image can be taken in a state where the target tooth and the peripheral tissue 50 are always directly facing each other. However, the image on the film surface obtained in this case becomes a photograph in which the greater the tilt of the X-ray film f, the larger the image portion below the film. For example, focusing on the specific portion point P ₁ , this is reflected on the film surface Pb as shown in the figure.

On the other hand, if the inclined film surface Ff is used as a reference and the image is taken perpendicularly to the film surface Ff as shown by c in the figure, the following phenomenon occurs. That is, in this case, the larger the inclination of the X-ray film f, the more basically the obtained film image tends to shrink. For example, the point P ₁ is Pc on the film surface.
Reflected in.

Considering the case where the X-ray film f is inclined and placed in the oral cavity, the direction of X-ray irradiation is important. According to the bisection method, as described above,
Since the irradiation direction is as shown by, the film image is always an intermediate film image regardless of the size of the inclination of the X-ray film f. For example, point P ₁ appears on Pa on the film surface.

Therefore, in the image obtained by the bisector method, even in the case of an imaged portion where the inclination of the X-ray film f becomes large, it is extremely stretched-as in the case of the former image pickup method described above. And the shrinkage does not occur-as in the case of the latter photographing method described above-and it does not deviate from any tendency. This is a feature of the imaging method by the bisector method (note that even in the case of the bisector method, the imaging site where the X-ray film f can be positioned in a parallel or substantially parallel state is substantially The bisector plane F2 is also parallel to the actual film plane Ff and the long axis center vertical plane F1, and as a result, the same film image as that photographed in the facing state as shown in FIG. Will be).

The characteristic of the bisection method is more useful when the surface of the X-ray film f is as flat as possible without being curved. Therefore, it is possible to prevent the occurrence of an unfavorable state such as the lower view of FIG. 4 (deformation of the lower edge portion of the film) and FIGS. 12 and 13 (bend of the film surface, image flow). ,desirable. According to the present invention, as described above, the bending of the dental X-ray film itself can be appropriately avoided. Therefore, the dental film (1
10, 120) and the dental X-ray film body (100) containing the same can exhibit more advantageous effects in this respect when used in the bisection method.

Further, it is more desirable to prevent the occurrence of bending of the X-ray film surface even when the subject's finger is pressed and held as shown in FIGS. 12 to 15. In this regard, in particular, according to the embodiments shown in FIGS.
Dental X-ray film body with backing plate to prevent bending (10
3, 104, 105, 106) are even more effective. This is because the type with a backing plate is more effective in preventing the film from bending than the type without a backing plate. Therefore, in the case of such a type with a backing plate, also in this respect, a more advantageous effect can be exhibited.

While the present invention has been described in terms of several preferred embodiments thereof, it is not limited thereto, and numerous modifications can be made without departing from the spirit and scope of the invention. It is a matter for a person skilled in the art to make modifications.

[Brief description of drawings]

1 shows a first embodiment of a dental X-ray film body according to the invention, in particular a dental X-ray body according to the invention, FIG.
A basic configuration (A in the figure) of one type of dental X-ray film body using a linear film (common for upper and lower jaws; type suitable for form correspondence type left and right (for molars)) It is a figure for contrasting and explaining with the dental X-ray film body (FIG. B of the same figure) using a standard dental X-ray fill.

FIG. 2 is a diagram showing a basic configuration of another type (common for upper and lower jaws; shape-compatible type for midline (for front tooth portion) type) according to a reference example of a dental X-ray film body according to the present invention.

FIG. 3 to FIG. 18 show the principle and features of the present invention.
FIG. 3 is a diagram for explaining using a model or the like showing the inside of the oral cavity, and FIG. 3 is an overall bird's-eye view of the bottom of the oral cavity of the lower jaw, viewed from slightly behind the lower jaw.

FIG. 4 is a bird's-eye view of the right side of the lower jaw, as viewed from the left side of the lower jaw.

[Fig. 5] Similarly, in the right lower jaw (molar) imaging,
It is a figure with which explanation of a contact state of a front corner part of a standard type dental X-ray film body is provided as a comparative example.

FIG. 6 also according to the invention, on the right side of the lower jaw,
It is a figure which shows an example of the mounting state of the dental X-ray film body suitable for radiography of a molar part or its vicinity.

FIG. 7 likewise generally shows the hard palate part of the upper jaw part, and shows the positive edge of the lower edge and the front side part of the ideal form-compatible dental X-ray film body according to the invention on the left side of the upper jaw. It is a figure showing a position (appropriate position).

8 is a diagram showing an example of a mounted state of a dental X-ray film body suitable for radiography of a molar tooth portion and its vicinity according to the present invention with respect to the normal position of FIG. 7 on the left side of the upper jaw.

FIG. 9 also according to the invention, on the right side of the upper jaw,
It is a figure which shows an example of the mounting state of the dental X-ray film body suitable for radiography of a molar part or its vicinity.

FIG. 10 is also a view for explaining the contact state of the front corner portion of the standard dental X-ray film body as a comparative example on the right side of the upper jaw.

FIG. 11 is also an example of a mounted state of a dental X-ray film body suitable for imaging a molar portion or its vicinity according to the present invention on the right side of the upper jaw, including a relationship with a tooth alignment;
FIG.

FIG. 12 is a diagram showing an example of film bending of a standard dental X-ray film body as a comparative example on the right side of the upper jaw.

FIG. 13 is a diagram showing an example of film bending of a standard dental X-ray film body as a comparative example on the right side of the upper jaw.

FIG. 14 is a diagram showing an example of film bending of a standard dental X-ray film body as a comparative example on the front side of the upper jaw (front tooth image).

FIG. 15 is a diagram showing an example of film bending of a standard dental X-ray film body as a comparative example on the front side of the upper jaw.

FIG. 16 is a dental X suitable for imaging an anterior tooth portion or its vicinity according to a reference example of the present invention on the upper jaw side as well.
It is a figure which shows an example of the mounting state of a linear film body.

FIG. 17 is a diagram showing an example of film bending of a standard dental X-ray film body as a comparative example, similarly in the case of photographing in the vicinity of the upper right canine.

FIG. 18 is also a diagram showing an example of a mounted state of the dental X-ray film body according to the present invention in the vicinity of the upper right canine tooth.

FIG. 19 is a diagram showing a specific example of an optimum form in a molar image capturing type according to the present invention.

FIG. 20 is a diagram showing a specific example of the optimum form in the anterior tooth imaging type according to the reference example of the present invention.

FIG. 21 is a diagram for explaining a dental X-ray film body having a light-shielding paper and a lead foil according to a second embodiment of the present invention, and is for manufacturing a molar part imaging type according to the second embodiment. It is a figure which also shows the process of.

FIG. 22 is a view similar to FIG. 21, showing an anterior tooth image capturing type according to a second embodiment of the present invention.

FIG. 23 is also an enlarged view showing a cross section of the dental X-ray film body according to the second embodiment.

FIG. 24 is a view showing a dental X-ray film body including a backing plate according to the third embodiment of the present invention.

FIG. 25 is a diagram for explaining a dental X-ray film body including a backing plate and a reference metal material according to a fourth embodiment of the present invention, which is for dental use according to the fourth embodiment. X
It is a figure which expands and shows the cross section of a linear film body.

FIG. 26 is a front view (FIG. A) and a rear view (FIG. B) showing a molar image capturing type according to the fourth embodiment.

FIG. 27 is a front view (FIG. A) and a rear view (FIG. B) showing an anterior tooth imaging type according to a fourth embodiment of the present invention.

FIG. 28 is a schematic diagram for explaining a common mode, similarly showing an example of a molar image capturing type according to the fourth embodiment.

FIG. 29 is a diagram illustrating the principle of the bisection method.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61B 6/00 A61B 6/14 G03C 1/765 G03C 3/00

Claims (6)

(57) [Claims] 1. A rectangular-shaped dental X-ray film which is placed in the oral cavity and used for X-ray photography, wherein the dental X-ray film includes one corner of the rectangular shape. Only in the quadrant, at the midpoint of the long side corresponding to the quadrant of the rectangular shape, on the side close to the one corner, and at the midpoint of the short side corresponding to the quadrant of the rectangular shape. Dental X in which a curved portion that is convex toward the outside is formed to connect between points that are close to each other near the one corner portion.
A dental X-ray film body including a line film and a film housing body for housing the dental X-ray film, wherein the film housing body is similar to the outer shape of the dental X-ray film to be housed. In the shape, it has a predetermined size large shape, on one side of the film container, a plate body that can be pressed by applying a finger when the subject holds the film container in the oral cavity, at least A dental X-ray film body which is provided with a shape-retaining plate that is more difficult to bend than the built-in dental X-ray film. 2. The dental X-ray film body according to claim 1, wherein the shape-maintaining plate has a shape similar to the outer shape of the film storage body and has a smaller size by a predetermined size. 3. The dental X-ray film body according to claim 1, wherein the shape holding plate has a shape that is concentrically reduced by 3 mm from the outer circumference of the film storage body. 4. The morphology-maintaining plate is provided with a protrusion at a central portion or a portion in the vicinity of the central portion of the plate body on which a fingertip of a subject touches. The dental X-ray film body according to any one of 1. 5. The shape holding plate is a plastic plate having a thickness of approximately 0.5 mm, and the plastic plate is attached to the film storage body. The dental X-ray film body according to any one of 1. 6. A lid which is stacked on the back side of the film container so as to seal the bag-shaped part for housing the dental X-ray film and the opening of the bag-shaped part. And a form retaining plate, wherein the form retaining plate is attached to the lid portion, or is provided so as to be commonly used by the lid portion. The dental X-ray film body according to any one of claims 1 to 5.