WO2013191101A1

WO2013191101A1 - Intraoral x-ray imaging device

Info

Publication number: WO2013191101A1
Application number: PCT/JP2013/066454
Authority: WO
Inventors: 清水　康行; 典行清水; 大行清水
Original assignee: Shimizu Yasuyuki
Priority date: 2012-06-18
Filing date: 2013-06-14
Publication date: 2013-12-27
Also published as: JP5638703B2; JPWO2013191101A1

Abstract

Provided is an intraoral X-ray imaging device with which the imaging technician is able to confirm the position of the X-ray-sensitive body in the mouth during X-ray imaging, and an intraoral X-ray imaging method using said device. The device (1) comprises a holding section (2) and an immobilizing section (3). The holding section (2) is a region, the projected shape of which is cross-shaped when seen from the front side or the back side, and comprises a supporting wall (11), a left side-holding section (12a), a right side-holding section (12b), and a stopper (4). A package (10) is set in the device (1). The package (10) is disposed on the back surface of a maxillary tooth (17) inside the oral cavity (20) with the immobilizing section (3) side protruding to the outside (40) of the mouth. In this configuration, the immobilizing section (3) is clamped with the upper and lower teeth (17, 18). The rotation orientation of the immobilizing section (3) corresponds to the rotation orientation of the holding section (2), and the rotation orientation of the holding section (2) inside the mouth can be inferred from the rotation orientation of the immobilizing section (3). The package (10) inside the oral cavity (20) can be seen from the gap between the rows of teeth.

Description

Intraoral radiography device

The present invention relates to a device for holding an X-ray photosensitive member in the mouth when performing X-ray photography in the mouth by intraoral X-ray photography.

As a measure for diagnosing caries, periodontal disease, etc., X-ray photography of the mouth is widely performed. One of the methods for X-ray imaging of the mouth is the mouth method. The intraoral method is a general term for measures for putting a photosensitive film in the mouth and exposing the photosensitive film by irradiating X-rays from the outside.
The photosensitive film inserted into the mouth is packaged with a light-shielding film that transmits only X-rays and blocks sunlight or the like, and is mounted in the mouth. Then, after photographing, the packaging is removed in a dark room or the like, and the photosensitive film is taken out and developed. In recent years, an imaging plate (IP) for X-ray photography is often used as a photoreceptor instead of a photosensitive film.

The intraoral method is further classified into a bisection method, a parallel method, a bite wing method, and an occlusal method according to specific methods.

In the bisection method and the parallel method, a photosensitive film is installed on the back side of a tooth, and in principle, the patient himself presses and holds the film (the packaged photoreceptor, hereinafter referred to simply as a film) with his / her fingers. . In this state, X-rays are irradiated from the outside to expose the film.
On the other hand, the bite wing method is a method of photographing with the mouth closed, and is used for photographing of a molar. That is, in the biting wing method, a film is placed inside the upper and lower teeth, and X-rays are irradiated obliquely from above to photograph the teeth.
The film 100 used for the biting wing method has an external shape as shown in FIG. That is, the film 100 has a light-shielding film packaging 101 that blocks sunlight and the like, and a photosensitive film 102 is built in, and a plate-type biting portion 105 (hereinafter referred to as a biting portion) is provided on one surface of a main body portion 106 of the packaging 101. 105.) is provided.
In the prior art, the bite portion 105 is extremely thin.
In the bite wing method, the film 100 is inserted on the back side of the upper and lower molars. That is, the film 100 is disposed on the inner side of the cheek and further on the back side of the dentition. In this state, the bite portion 105 is bitten by the upper and lower molars, and the film 100 is fixed.

Japanese Unexamined Patent Publication No. 6-289543

The above-described intraoral method allows photographing of the intraoral with a simple device. Therefore, it is possible for the dentist to carry a set of imaging devices and take an image of the patient's mouth through a home visit.
By the way, the intraoral method can be performed without any problem for a healthy person, but it may be difficult for an elderly person or a patient with a disability.
That is, it is difficult to perform the bisection method or the parallel method for a patient who has a sequelae such as cerebral infarction, a finger movement disorder, and cannot hold the film by hand.
For patients who cannot hold the film with their fingers, some kind of auxiliary device (device) will be used. Here, it is conceivable to take a picture using the film 100 (FIG. 10) used in the above-described biting wing method.
As described above, the bite wing method is used for photographing a molar. Specifically, the film 100 is placed on the back side of the molar, and in this state, the bite portion 105 is bitten by the upper and lower molars and photographing is performed.

However, patients with after-effects such as cerebral infarction are weak in biting and may not be able to match the upper and lower teeth.
On the other hand, the film 100 used for the bite wing method is used for photographing a molar, and the bite portion 105 is extremely thin. Therefore, patients with after-effects such as cerebral infarction cannot successfully bite the film 100 used in the conventional biting wing method.
In addition, patients and elderly people with sequelae such as cerebral infarction cannot explain the state of the mouth to the doctor and cannot hold the film in the vicinity of the site to be photographed by the doctor.

Therefore, when photographing the mouth of these critically ill patients, it is necessary to rely on a method of photographing without putting a film in the mouth, such as panoramic radiography.
However, devices such as panoramic X-ray photography are large and cannot be carried. Therefore, it is necessary for the patient himself to go to a dental clinic equipped with a panoramic X-ray apparatus, but the bedridden patient cannot go to the dental clinic and cannot receive satisfactory treatment. It is.

In view of this, the present invention proposes a method capable of performing imaging by the intraoral method even for elderly people and persons with disabilities, and the photographer confirms the position of the X-ray photoreceptor in the mouth during X-ray imaging. It is an object to provide a device for intraoral X-ray imaging that can be performed.

One aspect of the present invention for solving the above-described problems is an intraoral X-ray imaging device that is used when an X-ray photoconductor is placed in the mouth and the teeth of the upper and lower jaws are X-rayed. The X-ray photosensitive member held by the holding portion, and a holding portion for holding the X-ray photosensitive member, and a fixing portion sandwiched between the upper and lower jaw teeth. The fixing portion has an upper abutment portion that abuts on the upper teeth or gums and a lower abutment portion that abuts on the lower teeth or gums. The maxillary side abutting part and the mandibular side abutting part are separated from each other, and when the fixing part is clamped between the maxillary and mandibular teeth, the X-ray photoreceptor held by the holding part can be seen from outside the mouth. This is a device for intraoral X-ray imaging.

The device of this aspect has a holding part that holds the X-ray photosensitive member, and a fixing part that is sandwiched between the upper jaw side tooth and the lower jaw side tooth, and the holding part and the fixing part are integrated, Since the fixing portion extends in a direction intersecting with the X-ray photosensitive member held by the holding portion, the X-ray photosensitive member can be held in the mouth by sandwiching the fixing portion with upper and lower teeth. That is, it is not necessary to hold the X-ray photoconductor with fingers.
Since the X-ray photoreceptor held by the holding part can be seen from outside the mouth when the fixing part is sandwiched between the upper and lower jaw teeth, the photographer can check the position of the X-ray photoreceptor in the mouth. X-ray imaging can be performed. Therefore, X-ray imaging can be performed satisfactorily and it is difficult to fail. As a result, there is no need to retake the image, the time required to perform X-ray imaging is shortened, and the burden on the patient is reduced.
In addition, since the patient bites the intraoral X-ray imaging device of the present invention with the mouth slightly opened, even for patients who have sequelae such as elderly people or cerebral infarction and cannot close the mouth sufficiently. Can adapt.

In the above aspect, the holding unit holds a rectangular X-ray photoconductor having upper and lower sides and left and right sides, left and right side holding units holding the left and right sides of the X-ray photoconductor, In the state where one of the upper and lower sides of the X-ray photoconductor is in contact with the stopper, the X-ray photoconductor has X on the teeth on the upper or lower jaw side of the user. It is desirable that the central area of the linear photoreceptor will face.

In this aspect, the stopper of the holding part aligns the central region of the X-ray photoreceptor with the upper or lower jaw teeth, so that the trouble of the photographer is reduced. In addition, since the central region of the X-ray photoreceptor is reliably aligned with the maxillary teeth or the mandibular teeth, good X-ray imaging of the maxillary teeth and the like can be performed. Furthermore, since the central region of the X-ray photoconductor can be quickly aligned with the upper teeth and the like, the time required for X-ray imaging can be shortened and the burden on the patient can be reduced.

In each aspect described above, it is desirable that the holding part and the fixing part are integrally formed of a transparent material.

In this aspect, since the holding part and the fixing part are integrally formed of a transparent material, it is easy to see the mouth. Therefore, the photographer can easily confirm the position of the X-ray photoreceptor in the mouth.

In each aspect described above, a plurality of ridges or grooves extending in a direction perpendicular to the direction in which the fixing portion extends are provided in a portion where the teeth in the upper jaw contact portion and the lower jaw contact portion of the holding portion contact. It is desirable to be.

In this aspect, a plurality of ridges or grooves extending in the direction perpendicular to the direction in which the fixing portion extends are provided at the portion where the teeth in the upper and lower abutment portions of the holding portion abut. Engages either ridge or groove. Therefore, the intraoral X-ray imaging device cannot move in the direction in which the X-ray photosensitive member approaches or separates from the teeth of the X-ray imaging target. That is, the distance from the X-ray photoconductor to the X-ray imaging target tooth is fixed.
First, if this distance is set appropriately, this appropriate distance can be easily reproduced at the next shooting. That is, by recording the position of the ridge or groove of the fixed part engaged with the X-ray imaging target tooth, at the next imaging, just by engaging the tooth with the ridge or groove part, An appropriate distance between the tooth and the X-ray photoreceptor can be set.
Therefore, X-ray imaging can be carried out under the same conditions for every regular examination of the teeth, and the current dental condition can be diagnosed compared with the past condition. In other words, it is possible to easily grasp how the state of a specific tooth has changed over time, to make an appropriate diagnosis, and to carry out appropriate treatment in order to maintain good dental health. It becomes like this.

In each of the above aspects, it is desirable that the X-ray photoreceptor is mounted in an eccentric posture on the upper jaw side or the lower jaw side with respect to the fixed portion.

In each aspect described above, the holding portion has a support wall with which the X-ray photoconductor is in contact with the surface, and the support wall has a missing portion or an opening, and the presence of the X-ray photoconductor from the back side of the support wall. It is desirable that it can be visually recognized.

In each aspect described above, the missing portion or opening is located at a position corresponding to the side and / or corner of the X-ray photoconductor, so that the presence of the X-ray photoconductor can be visually recognized from the back side of the support wall. It is desirable that

In each of the above aspects, there is a holding unit that holds three sides of the X-ray photoconductor around the X-ray photoconductor mounting position of the holding unit, and the remaining one side of the X-ray photoconductor is open. The X-ray photosensitive member can be attached to the holding portion by linearly entering from the open side, and the missing portion or opening is provided at the front end side in the entering direction of the X-ray photosensitive member, and the back surface side of the support wall It is desirable that the presence of the X-ray photoreceptor can be visually confirmed.

In each aspect described above, it is desirable that the holding portion has a support wall with which the X-ray photoconductor contacts in a planar shape, and the support wall has a cross shape.

In each aspect described above, the area of the holding unit is smaller than the area of the X-ray photoconductor, and when the X-ray photoconductor is held by the holding unit, a part of the X-ray photoconductor protrudes from the holding unit. Is desirable.

In each of the above-described aspects, it is desirable that the upper jaw side contact portion and the lower jaw side contact portion have such rigidity that their relative positions and postures do not change when they are bitten with a normal force.

In each of the above-described aspects, it is desirable that the upper jaw side contact portion and the lower jaw side contact portion leave a bite mark when they are bitten with a normal force.

In each aspect described above, the width of the upper jaw side contact portion and the lower jaw side contact portion is desirably 10 mm to 20 mm.

In each aspect described above, the distance between the upper jaw side contact portion and the lower jaw side contact portion is desirably 5 mm to 20 mm.

In each aspect described above, the holding unit includes a support wall that contacts one surface of the X-ray photoconductor and a side holding unit that holds the side of the X-ray photoconductor. It is desirable to have an other surface support portion that contacts the other surface.

In each aspect described above, it is desirable that the other-surface support portion is integrated with the support wall and folded back to the front side of the support wall.

Another aspect of the present invention that solves the same problem is an intraoral X-ray imaging device used for X-ray imaging of the upper and lower jaw teeth and the like by arranging an X-ray photoreceptor in the mouth. A holding part for holding the X-ray photoreceptor, and a fixing part sandwiched between the upper and lower teeth, and the holding part is a rectangular X-ray having upper and lower sides and left and right sides. A holding member for holding the left and right sides of the X-ray photosensitive member; and a stopper for contacting one of the upper and lower sides of the X-ray photosensitive member. In a state where one of the upper and lower sides is in contact with the stopper, the central region of the X-ray photosensitive member faces the user's upper or lower jaw side teeth, and the area of the holding portion is the same as that of the X-ray photosensitive member. When the X-ray photoconductor is smaller than the area and is held by the holder, a part of the X-ray photoconductor protrudes from the holder. There is a missing portion at a position corresponding to the corner of the X-ray photoconductor so that the presence of the X-ray photoconductor can be visually recognized from the back side of the support wall, and the fixed portion is held by the holding portion. The fixing portion extends in a direction intersecting the imaging surface of the linear photosensitive member, and the fixing portion includes an upper jaw side contact portion that contacts an upper jaw side tooth or gum, and a lower jaw side contact that contacts the lower jaw side tooth or gum. When the upper jaw side contact portion and the lower jaw side contact portion are chewed with normal force, the relative position and posture of both of them will not change when they are chewed with normal force. The upper jaw side contact portion and the lower jaw side contact portion have a width of 10 mm to 20 mm, and the upper jaw side contact portion and the lower jaw side contact portion are separated from 5 mm to 20 mm. When the fixed part was clamped between the maxillary and mandibular teeth, it was held by the holding part from outside the mouth. Is intraoral X-ray imaging device, wherein the linear photoconductor is visible.

In each aspect described above, it is preferable that the stopper has an elasticity capable of supporting the X-ray photosensitive member by pressing.

In each aspect described above, one end of the stopper is fixed to the holding portion, the other end extends upward along the holding portion, and the most protruding portion that is farthest from the holding portion in the middle, and the holding portion It is preferable that the narrowest portion that is closest to the X-ray photoreceptor presses the X-ray photosensitive member.

In each aspect described above, it is preferable to have an inclined surface or a curved surface between the narrowest portion and the other end of the stopper.

Another aspect of the present invention relating to a method of using the above intraoral X-ray imaging device is that the holding unit of the intraoral X-ray imaging device is placed on the patient while the X-ray photoreceptor is held by the above-described holding unit. The position of the intraoral X-ray imaging device is confirmed from outside the mouth with the fixed part held between the maxillary and mandibular teeth, and then the patient is irradiated with X-rays. An intraoral X-ray imaging method characterized by exposing an X-ray imaging device.

In the intraoral X-ray imaging device of the present invention, the X-ray photoreceptor can be seen from the outside of the mouth when the fixing part is sandwiched between the upper and lower jaw teeth. X-ray imaging can be carried out while confirming the position. Therefore, X-ray imaging can be performed satisfactorily and it is difficult to fail. As a result, there is no need to retake the image, the time required to perform X-ray imaging is shortened, and the burden on the patient is reduced.
The intraoral X-ray imaging device of the present invention can also be applied to patients who cannot sufficiently close their mouths.

It is the perspective view which looked at the device for intraoral X-ray photography for anterior teeth and premolars concerning the embodiment of the present invention from the holding part side. It is the perspective view which looked at the device for intraoral X-ray imaging of FIG. 1 from the fixed part side. FIG. 3 is a cross-sectional perspective view taken along line AA in FIG. 2. FIG. 3 is a perspective view showing a state in which the intraoral X-ray imaging device in FIG. 2 holds an X-ray photoreceptor. FIG. 2 is a cross-sectional view of the oral cavity when the maxillary tooth is X-rayed with the intraoral X-ray imaging device of FIG. 1. It is a front view of the oral cavity in the state shown in FIG. FIG. 2 is a cross-sectional view of the oral cavity when X-ray imaging of the lower jaw teeth is performed with the intraoral X-ray imaging device of FIG. It is a front view of the oral cavity in the state shown in FIG. (A) is the perspective view seen from the fixing | fixed part side of the device for laterally long mouth X-ray photography which concerns on embodiment of this invention, (b) is the device for mouth X-ray photography of (a). It is the perspective view which looked at from the holding | maintenance part side. It is a perspective view of the package which packaged the X-ray film used by the biting wing method. It is a perspective view of the device for intraoral X-ray imaging different from the device for intraoral X-ray imaging of FIG. FIG. 12 is a partially enlarged side view of the intraoral X-ray imaging device of FIG. 11, (a) shows a state in which the packaging body approaches the stopper, and (b) shows a packaging body in which the packaging body is pressed and supported by the stopper. (C) shows the state where the lower side of the package is in contact with the stopper.

Hereinafter, description will be made with reference to the drawings. In the following description, the vertical relationship is based on the case where the intraoral X-ray imaging device 1 is in the posture shown in FIG. The X-ray photoreceptor is a concept including an X-ray film and an imaging plate (IP) capable of digital data processing.

The intraoral X-ray imaging device 1 shown in FIGS. 1 to 3 is used for imaging front teeth and premolars. That is, the package 10 attached to the intraoral X-ray imaging device 1 is a vertically long rectangle and narrow in width as shown in FIG. Specifically, the package 10 is a quadrangle having upper and

lower sides

10a and 10c and left and

right sides

10b and 10d, and the left and

right sides

10b and 10d are longer than the upper and

lower sides

10a and 10c. A vertically long X-ray photoreceptor is light-shielded and packaged inside the vertically long package 10. That is, the X-ray photoreceptor is in a state in which the longitudinal direction of the package 10 and the longitudinal direction of the X-ray photoconductor match, and the short direction of the package 10 and the short direction of the X-ray photoconductor match. Is arranged in the center of the package 10. The X-ray photoreceptor is attached to the intraoral X-ray imaging device 1 via the package 10.
The intraoral X-ray imaging device 1 shown in FIGS. 1 to 3 (hereinafter sometimes simply referred to as device 1) is formed of a resin. It is desirable that the material resin is transparent.
It is desirable that the resin is soft enough not to damage the teeth when the elderly or the like chew it. However, it is not preferable that it is so soft that the whole is deformed when a force is applied.
The most recommended resin is a resin having such a rigidity that the relative position and posture of the two do not change when biting with a normal force and a hardness that leaves a bite mark when biting with a normal force.
The device 1 of this embodiment has a holding part 2 and a fixing part 3 as shown in FIGS.

The holding part 2 is a part in which the projected shape viewed from the front side (inside mouth insertion side) and the back side (outside protrusion side) has a cross shape, and includes a support wall 11, a left side holding part 12a, and a right side holding part. 12b and a stopper 4 are provided. The support wall 11 is a plate-like part extending in the vertical direction.
The flat surface on one side of the support wall 11 functions as the photosensitive member holding surface 35 (see FIG. 1), and the back surface side functions as the fixed portion connecting portion 36 (see FIG. 2).
In the vicinity of the center of the support wall 11 in the height direction, there is a protruding portion 9 that protrudes to the left and right.

The left side holding part 12a and the right side holding part 12b are located on the photosensitive body holding surface 35 side of the support wall 11, and are portions where the tip side of the overhanging part 9 is folded. That is, the support wall 11 has a protruding portion 9 that protrudes in the left-right direction from the central portion, and the left side holding portion 12a and the right side holding portion 12b are folded at the distal end side of the protruding portion 9 to the mouth insertion side (front side). This is a portion (other surface support portion). The free ends of the left side holding part 12a and the right side holding part 12b are curved outward.
There is a gap 33 between the left side holding part 12 a and the right side holding part 12 b and the overhanging part 9 of the photoreceptor holding surface 35.
The air gap 33 is a groove extending in the vertical direction.

A stopper 4 is provided on the support wall 11 on the side of the photoreceptor holding surface 35. The stopper 4 is a small piece (a plate-like member) that stands up from the lower end portion 11a side of the support wall 11 on the photosensitive member holding surface 35 side.
The holding unit 2 has a function of holding an X-ray photoreceptor (not shown). More precisely, the holding unit 2 holds the package body 10 covered with the X-ray photoreceptor.

The left side holding part 12a, the right side holding part 12b, and the stopper 4 described above function as a holding part 2 that holds three sides of the package (X-ray photosensitive member) 10, and the remaining one side of the holding part 2 is open. Has been. The package 10 can be attached to the holding unit 2 by linearly entering from the opening side of the holding unit 2.

As is apparent from FIGS. 1 and 4, the area of the holding unit 2 is smaller than the area of the package 10. As described above, the holding portion 2 is a portion in which the projection shape viewed from the front side and the back side has a cross shape, and the support wall 11 has a cross shape.
Conversely, it can be said that the holding part 2 has four

missing parts

60, 61, 62, 63. That is, in this embodiment, there are missing

portions

60 and 61 at the lower corners of the holding portion 2. Further, there are missing

portions

62 and 63 at the upper corners of the holding portion 2.

Next, the fixing part 3 will be described. As shown in FIG. 2, the fixing portion 3 is provided on the fixing portion connecting portion 36 side of the holding portion 2 and has a certain length M (see FIG. 1). The axis of the fixed portion 3 is orthogonal to the plane formed by the support wall 11.
Therefore, when the package 10 is held by the holding unit 2, the axis of the fixing unit 3 extends in a direction perpendicular to the imaging surface of the X-ray photoreceptor held by the holding unit 2.

Further, the position where the fixing portion 3 is provided is a position that is greatly decentered with respect to the holding portion 2.
As described above, the holding part 2 has a cruciform projection, but the intersection of the central axis C (FIG. 5) of the fixing part 3 and the holding part 2 is 30 of the height of the support wall 11. Located at a height of less than a percent.
The cross section of the fixed portion 3 has a shape like an H-shaped steel. That is, the fixed portion 3 has a structure in which parallel

thin plate portions

7 and 8 are connected by a plate-like connection portion 6. In the present embodiment, the surface of the thin plate portion 7 functions as the upper jaw side contact portion 45 (see FIG. 5), and the surface (lower surface) of the thin plate portion 8 functions as the lower jaw side contact portion 46 (see FIG. 5). .

The

thin plate portions

7 and 8 both have a certain width W (see FIG. 2). More specifically, the width W of the

thin plate portions

7 and 8 is wider than the width of a standard adult tooth. More specifically, the width W of the

thin plate portions

7 and 8 is about 10 mm to 20 mm, more preferably about 13 mm to 18 mm.
When the width W of the

thin plate portions

7 and 8 is narrow, the patient bites with only one upper and lower teeth, and the posture of the holding portion 2 is not stable. That is, when the patient bites with only one tooth, the fixing portion 3 rotates and the holding portion 2 swings in the mouth, and the posture of the package 10 is not stable.
On the other hand, when the width W of the

thin plate portions

7 and 8 is excessively wide, the burden on the patient is large. That is, when the width W of the

thin plate portions

7 and 8 is excessively wide, the teeth are bitten by a large number of teeth, and the posture of the holding portion 2 changes due to the teeth contacting the fixed portion 3 being replaced when the patient moves the jaw. .
Ideally, the fixed portion 3 is bitten by two teeth on the upper and lower sides or three teeth, and the width W is designed to be about twice the width of an adult tooth.
A plate-like blocking portion 13 is provided on the free end side of the fixed portion 3. Further, the support wall 11 of the holding part 2 is fixed to the other end of the fixing part 3.

The thin plate portion 7 includes a plurality of protrusions 5 on the surface opposite to the surface connected to the connection portion 6. The ridge 5 extends in a direction orthogonal to the direction in which the fixing portion 3 extends. Similarly, the thin plate portion 8 includes a plurality of protrusions 15 on the surface opposite to the surface connected to the connection portion 6. The ridge 15 also extends in a direction orthogonal to the direction in which the fixing portion 3 extends. The ridges 5 and the ridges 15 are arranged at predetermined equal intervals.
Since the fixed portion 3 has a structure in which the parallel

thin plate portions

7 and 8 are connected by the plate-like connecting portion 6 as described above, it has a certain height T (see FIG. 2). Yes. That is, there is a certain distance between the parallel

thin plate portions

7 and 8.
The height T is about 5 mm to 20 mm. As an index, it is desirable that the tooth height H1 (see FIG. 5) of the upper front teeth of the patient and the tooth height H2 (see FIG. 7) of the front teeth of the lower jaw be equal to or higher.
Therefore, the height T is desirably about 10 mm to 15 mm for adults, and about 5 mm to 10 mm is recommended for children.

The package 10 is installed in the intraoral X-ray imaging device 1 described above. The package 10 is an X-ray photoreceptor that is light-shielded and packaged. In each drawing, the size of the package 10 (X-ray photoconductor) is not faithfully depicted, but the package 10 (X-ray photoconductor) is a standard product, and vertical and horizontal dimensions are defined.
However, the area of the package 10 is larger than the area of the holding part 2 of the intraoral X-ray imaging device 1, and the upper part of the package 10 protrudes from the intraoral X-ray imaging device 1. As described above, since the fixing portion 3 is provided at a position that is greatly decentered with respect to the holding portion 2, the fixing portion 3 is further eccentrically provided with respect to the package 10.

When the package 10 is installed in the device 1, as shown in FIG. 4, one surface of the package 10 is in contact with the photoreceptor holding surface 35 (see FIG. 1), and the central portion of the package 10 is the overhanging portion 9 and the left side. It is supported by the holding part 12a and the right side holding part 12b. Further, the lower side 10c of the package 10 is placed on the stopper 4 as shown in FIG.
Therefore, the left and

right sides

10b and 10d of the package 10 are inserted and held in the groove formed by the gap 33, and the lower side 10c is supported by the stopper 4, so that the package 10 is supported so as not to move. .
A lower region 10A of the package 10 is exposed below the overhanging portion 9, and an upper region 10B of the package 10 is exposed above the overhanging portion 9.
That is, there is a lower region 10A of the package 10 in the missing

portions

60 and 61 formed at the lower corners of the holding unit 2, and the lower region 10A of the package 10 is exposed.

At this time, one side (upper side 10a) on the opposite side to the stopper 4 in the package 10 is exposed upward from the upper end part 11b of the support wall 11 of the holding part 2.

The device 1 is used when photographing either the maxillary tooth 17 or the mandibular tooth 18. That is, when the upper teeth 17 are X-rayed, the device 1 is used in the posture shown in FIG. Further, when X-ray imaging is performed on the lower jaw teeth 18, the device 1 is used in the posture shown in FIG.

For example, when photographing the maxillary maxillary teeth 17 using the device 1, as shown in FIG. 5, the device 1 is arranged so that the stopper 4 in the holding portion 2 is positioned downward. In this state, the holding unit 2 of the device 1 is put in the mouth 20.
Here, in the device 1 of the present embodiment, since the fixing portion 3 is provided at a position that is greatly decentered with respect to the holding portion 2, the area of the package 10 is higher in the region above the fixing portion 3. Much larger than the lower area. Therefore, the package 10 completely covers the projection area of the upper teeth 17 that are the imaging target, and the central region of the X-ray photoreceptor faces the upper teeth 17.

A specific mounting procedure will be described. The package 10 is placed in the mouth 20, the tip of the upper jaw 17 is brought into contact with the upper jaw side contact portion 45 which is the surface of the thin plate portion 7 of the fixing portion 3 of the device 1, and the lower jaw The tip of the tooth 18 is brought into contact with the lower jaw side contact portion 46 which is the surface of the thin plate portion 8. That is, the package 10 is disposed on the back side of the maxillary tooth 17 in the mouth 20, and the fixed portion 3 side is brought out of the mouth. In this state, the fixed portion 3 is bitten by the

maxillary teeth

17 and 18.
As a result, the upper jaw side contact portion 45 and the lower jaw side contact portion 46 of the fixed portion 3 are bitten by separating the upper jaw teeth 17 and the lower jaw teeth 18 by the height T of the fixed portion 3. Further, since the width W of the

thin plate portions

7 and 8 is designed to be about twice the width of an adult tooth, the patient holds the fixing portion 3 with two teeth on the upper and lower sides. Therefore, the

thin plate portions

7 and 8 are stabilized in a posture parallel to the line of the patient's tooth tip.
Furthermore, since the device 1 has rigidity enough to prevent the patient from being twisted as a whole, the rotation posture of the fixing portion 3 protruding from the mouth and the rotation posture of the holding portion 2 are in a corresponding relationship and fixed. The rotational posture of the holding unit 2 in the mouth can be estimated from the rotational posture of the unit 3. Therefore, the posture of the package 10 in the mouth can be estimated from the outside.

Further, as shown in FIG. 6, the package 10 in the mouth 20 can be visually recognized from the mouth 40. In FIG. 6, the right upper canine tooth 17a, the first premolar 17b, the second premolar 17c, the first premolar 17d, the right lower canine 18a, the first premolar 18b, and the second premolar 18c of the patient. A first molar 18d is depicted. The

maxillary premolars

17b and 17c are the teeth to be imaged.

The

maxillary premolars

17b, 17c and the

mandibular premolars

18b, 18c biting the fixing part 3 of the device 1 having the height T are separated by a distance corresponding to the height T. Therefore, in a state where the patient bites the fixed portion 3, a gap is formed between the upper and lower teeth, and the doctor can look into the patient's mouth 20. If necessary, a mirror can be inserted from the gap, and the posture of the package 10 can be observed.

Further, in the present embodiment, the support wall 11 of the holding portion 2 has a cross shape, and there are missing portions 60 and 61 (see FIGS. 4 and 6) at the lower corners, and the missing

portions

60 and 61 are packaged. There is a lower region 10A (see FIGS. 4 and 6) of the body 10, and the lower region 10A of the package 10 is exposed. Therefore, the package 10 of the missing

portions

60 and 61 can be seen from the gap between the dentitions. That is, a part of the package 10 can be seen from the outside 40 (see FIG. 5), and the posture of the package 10 can be confirmed. Here, in this embodiment, if there is a lower region 10 </ b> A of the package 10 in the missing

portions

60 and 61 of the holding unit 2, it is confirmed that the package 10 is in a normal position with respect to the holding unit 2.
Moreover, in this embodiment, since the device 1 is shape | molded by transparent resin, the attitude | position of the package 10 can also be confirmed by measures, such as illuminating a light from the outside 40.
When X-rays are irradiated from the direction indicated by the arrow B (see FIG. 5) after the above confirmation work, the image of the maxillary teeth 17 is projected on the substantially central region of the X-ray photoconductor.

As described above, the X-ray photoreceptor is light-shielded and packaged in a state of being arranged in the center of the package 10. Therefore, the position and posture of the X-ray photoconductor can be easily estimated from the position and posture of the package 10. That is, the position and posture of the X-ray photoconductor can be confirmed via the package 10.

In the present embodiment, the lower region 10A of the package 10 held by the holding unit 2 is visible from the mouth 40. Therefore, the radiographer can perform X-ray imaging while confirming the positional relationship between the package 10 (X-ray photoreceptor) in the patient's mouth 20 and the upper teeth 17 of the imaging target.

Then, if the teeth to be imaged are two premolars (first premolar 17b and second premolar 17c) of the upper jaw, as shown in FIG. Align to. When the imaging target is only the second premolar 17c adjacent to the molar 17d, the center of the package 10 is aligned with the second premolar 17c. This alignment is similarly performed when photographing the molars (first molar 17d and second molar not shown) and anterior teeth (canine 17a and incisors not shown), and mandibular teeth. The

In the embodiment described above, the support wall 11 is designed in a cross shape and provided with the missing

portions

60, 61, 62, 63 at the four corners. The structure which can confirm the body 10 may be sufficient.
Note that the missing

portions

60, 61, 62, and 63 are not necessarily required, and may be devices that do not have a missing portion.

Here, the distance L from the maxillary tooth 17 to be imaged to the X-ray photoreceptor (packaging body 10) is set by the position of the protrusion 5 of the fixing portion 3 with which the maxillary tooth 17 is engaged. In the example shown in FIG. 5, the left end protrusion 5a and the fourth protrusion 5b counting from the left are engaged with the upper teeth 17 (

molar teeth

17b and 17c). Similarly, the lower jaw tooth 18 is engaged with the second protrusion 15a counted from the left side, and further crushes the third protrusion 15b counted from the left side. As described above, when the upper jaw 17 and any one of the protrusions 5 are engaged, and when the lower jaw tooth 18 and any of the protrusions 15 are engaged, the device 1 cannot advance or retreat from the mouth 20. That is, the distance L is fixed.

The engagement between the upper teeth 17 and the respective ridges 5 and the lower jaw teeth 18 and the respective ridges 15 not only fix the distance L but also exhibit a function of reproducing the distance L. That is, if the upper teeth 17 engage with the

ridges

5a and 5b, the

ridges

5a and 5b are damaged. Similarly, when the lower jaw teeth 18 engage with the

ridges

15a and 15b, the

ridges

15a and 15b are damaged. Therefore, the

protrusions

5a and 5b and the

protrusions

15a and 15b can be distinguished from other protrusions. Moreover, in the example shown in FIG. 5, the protrusion 15b is crushed. Therefore, the position of the lower jaw tooth 18 with respect to the fixed part 3 can be easily reproduced.

Then, once the device 1 is taken out from the mouth 20 and the device 1 is put into the mouth 20 again, the

specific ridges

5a and 5b are engaged with the maxillary teeth 17, and the

specific ridges

15a and 15b are in the lower jaw. The device 1 (X-ray film) is placed in the mouth 20 so as to engage with the teeth 18. As a result, the distance from the upper jaw 17 to the package 10 (X-ray film) can be set to the distance L. Therefore, a good X-ray image is surely obtained, and there is no need to retake (re-take).

Even if a plurality of parallel grooves are provided in the thin plate portion 7 instead of the ridges 5, the same effect as the ridges 5 can be obtained. Even if a plurality of parallel grooves are provided in the thin plate portion 8 instead of the ridges 15, the same effect as the ridges 15 can be obtained. That is, when the upper and lower teeth are engaged with any of the plurality of parallel grooves, the position of the device 1 with respect to the teeth is fixed.

When photographing the lower jaw teeth 18, the device 1 is mounted upside down from the previous case. When photographing the lower jaw teeth 18, as shown in FIG. 7, the thin plate portion 7 functions as the lower jaw side contact portion 46 and the thin plate portion 8 functions as the upper jaw side contact portion 45.
In the case of photographing the lower jaw teeth 18, the package 10 in the mouth 20 can be seen from the mouth 40. Therefore, a good X-ray photograph can be surely taken, there is little re-taking (re-taking), and the burden on the patient is light.

That is, the upper teeth 17 are engaged with the left end protrusion 15 a of the fixing portion 3 of the device 1 and the fourth protrusion 15 c counted from the left side, and the lower teeth 18 are connected from the left side of the fixing portion 3. While counting and engaging with the second protrusion 5c, the third protrusion 5d counting from the left side is crushed. Therefore, the device 1 cannot move in the direction in which the fixing portion 3 extends, and the position of the package 10 (X-ray photosensitive member) in the mouth 20 is fixed. Further, the position of the package 10 (X-ray photoreceptor) in the mouth 20 can be easily reproduced.

The device 1 according to the embodiment described above is used for photographing an anterior tooth (an incisor, a canine) or a premolar, but when photographing a molar, FIGS. 9A and 9B are used. ), An intraoral X-ray imaging device 51 (hereinafter referred to as device 51) that holds the package 10 (X-ray photoconductor) in a horizontal position (horizontal) is used. As the holding part 52 of the device 51, one having a wide overall width according to the package 10 is used. That is, the overhang length of the overhang portion 59 of the holding portion 52 of the device 51 is longer than the overhang length of the overhang portion 9 of the holding portion 2 of the device 1 shown in FIG. In the device 51, the X-ray photosensitive package 10 can be held in the lateral position in the landscape orientation. As shown in FIG. 9A, the device 51 can hold the left and right sides of the packaging body 10 in the horizontal position (horizontally long) with the left and right

side holding parts

12a and 12b. Further, when photographing the upper molars, the lower side of the package 10 in the lateral position can be supported by the stopper 4.

Other configurations of the device 51 are the same as those of the intraoral X-ray imaging device 1 described above except that the free end side of the fixed portion 3 is rounded. The same reference numerals are given to the members, and detailed description is omitted.

The free end sides of the thin plate portion 7 and the thin plate portion 8 constituting the fixed portion 3 are arranged in the width direction of the fixed portion 3 (longitudinal direction of the ridge 5) as shown in FIGS. 9 (a) and 9 (b). The center part protrudes most. That is, the corner of the free end of the thin plate portion 7 is rounded by being machined or manually cut.

The device 51 configured in this manner holds the package 10 (X-ray photoreceptor) in a lateral position. The device 51 is used when radiographing a molar tooth. When X-ray imaging of the molar is performed, the fixed portion 3 of the device 51 is bitten by the upper and lower molars, and the package 10 (X-ray photosensitive member) is aligned with the upper or lower molar. In that case, the adjacent premolars often appear simultaneously.

In the previous embodiment, the left side holding part 12a and the right side holding part 12b have been described as a part where the tip side of the overhanging part 9 is simply folded back into the mouth insertion side. The holding part 12b may have an elastic force so that the package 10 can be sandwiched between them.

As described above, the device 1 is used when radiographing the front teeth (incisors, canines) and premolars, and the device 51 is used when radiographing the molars. In other words, by using the device 1 and the device 51, all teeth (anterior teeth, premolars, molars) can be radiographed.

Instead of the stopper 4 provided in the

devices

1 and 51, a stopper 74 as shown in FIG. A difference in configuration between the intraoral X-ray imaging device 71 (hereinafter referred to as the device 71) shown in FIG. 11 and the device 1 (FIG. 1) is that a stopper 74 is employed instead of the stopper 4 in the device 71. It is only a point. Therefore, the overlapping description is omitted.

As shown in FIG. 11, a stopper 74 is provided on the photosensitive member holding surface 85 of the holding portion 72 of the device 71. The stopper 74 constitutes a hook having one end (base end portion 75) fixed to the photoreceptor holding surface 85.

The stopper 74 is an elastic member, and as shown in FIG. 12A, in order from one end side to the other end side, a base end portion 75 (one end), a most projecting portion 76, a narrowest portion 77, a free end portion 78 ( Other end).
The most projecting portion 76 is a portion that is the farthest from the photosensitive member holding surface 85 and can accommodate the package 10 having a thickness t.
The narrowest portion 77 is continuous with the most projecting portion 76 and gradually approaches the photoconductor holding surface 85 as it approaches the narrowest portion 77 from the most projecting portion 76 side. Between the most protruding portion 76 and the free end portion 78, the narrowest portion 77 is closest to the photoconductor holding surface 85, and the narrowest portion 77 and the photoconductor holding surface 85 are separated by a distance s. The distance s is smaller than the thickness t of the package 10.

Further, the stopper 74 is separated from the photosensitive member holding surface 85 as it approaches the free end portion 78 (the other end) from the narrowest portion 77. That is, a curved surface 79 (an inclined surface is also possible) is formed from the narrowest portion 77 to the free end portion 78.

When the package 10 (X-ray photoconductor) approaches the stopper 74, the lower side 10 c of the package 10 contacts the curved surface 79 between the narrowest portion 77 and the free end 78 of the stopper 74. Touch. That is, the lower side 10c of the package 10 passes through the gap 83 (see FIG. 11), and the package 10 is held by the

side portions

82a and 82b. Therefore, the package 10 descends while contacting the photoconductor holding surface 85.

When the packaging body 10 descends, the packaging body 10 spreads the narrowest portion 77 of the stopper 74 and enters the state shown in FIG. In the state shown in FIG. 12B, the package 10 is pressed by the stopper 74 (the narrowest portion 77) and is sandwiched between the photoreceptor holding surface 85 and the narrowest portion 77, and the lower side of the package 10. 10 c is not in contact with the inner surface of the stopper 74. That is, the package 10 can be stopped in the state shown in FIG.

Also, the package 10 can be pushed further downward. That is, as shown in FIG. 12C, the lower side 10 c of the package 10 can be brought into contact with the inner surface of the stopper 74.

Therefore, as shown in FIGS. 12B and 12C, the installation height of the package 10 with respect to the device 71 can be adjusted. Thereby, the relative position of the package 10 and the device 71 can be finely adjusted. That is, the installation position of the package 10 (X-ray film) in the patient's mouth can be finely adjusted.

DESCRIPTION OF SYMBOLS 1 Intraoral X-ray imaging device 2 Holding part 3 Fixing part 4

Stopper

5,15 Projection 6 Connection part 7 Thin plate part 8 Thin plate part 10 X-ray film package 45 Upper jaw side contact part 46 Lower jaw side contact part 51 Intraoral X-ray imaging device 52 holding unit

Claims

An intraoral X-ray imaging device used when an X-ray photoconductor is placed in the mouth and the teeth of the upper and lower jaws are X-rayed,
A holding part for holding the X-ray photosensitive member, and a fixing part sandwiched between the upper jaw side teeth and the lower jaw side teeth,
The fixing portion extends in a direction intersecting the imaging surface of the X-ray photosensitive member held by the holding portion,
The fixing portion has an upper jaw side contact portion that comes into contact with an upper jaw side tooth or gum, and a lower jaw side contact portion that comes into contact with a lower jaw side tooth or gum,
The maxillary side abutting part and the mandibular side abutting part are separated from each other, and the X-ray photoreceptor held by the holding part can be seen from outside the mouth when the fixing part is held between the maxillary and mandibular teeth. An intraoral X-ray imaging device characterized by
The holding unit holds a rectangular X-ray photoconductor having upper and lower sides and left and right sides, a left and right side holding unit holding the left and right sides of the X-ray photoconductor, and an upper and lower sides of the X-ray photoconductor. A central region of the X-ray photosensitive member on the upper or lower teeth of the user in a state where the upper and lower sides of the X-ray photosensitive member are in contact with the stopper. The device for intraoral X-ray imaging according to claim 1, characterized in that
3. The intraoral X-ray imaging device according to claim 1 or 2, wherein the holding portion and the fixing portion are integrally formed of a transparent material.
A plurality of ridges or grooves extending in a direction perpendicular to the direction in which the fixing portion extends are provided at a portion where the teeth in the upper jaw side contact portion and the lower jaw side contact portion contact each other. The intraoral X-ray imaging device according to any one of claims 1 to 3.
The intraoral X-ray imaging device according to any one of claims 1 to 4, wherein the X-ray photosensitive member is attached in an eccentric posture toward the upper jaw side or the lower jaw side with respect to the fixed portion.
The holding portion has a support wall with which the X-ray photoconductor contacts in a planar shape, and the support wall has a missing portion or an opening so that the presence of the X-ray photoconductor can be visually recognized from the back side of the support wall. The intraoral X-ray imaging device according to claim 1, wherein the device is an intraoral X-ray imaging device.
The missing portion or opening is located at a position corresponding to a side portion and / or a corner portion of the X-ray photoconductor so that the presence of the X-ray photoconductor can be visually recognized from the back side of the support wall. The intraoral X-ray imaging device according to claim 6.
Around the mounting position of the X-ray photoconductor of the holding unit, there is a holding unit that holds the three sides of the X-ray photoconductor, and the remaining one side of the X-ray photoconductor is open. It can be attached to the holding part by linearly entering from the open side, and the X-ray photoreceptor is present from the back side of the support wall with the missing part or opening at the front end side in the entry direction of the X-ray photoreceptor. The device for intraoral X-ray imaging according to claim 6, wherein the device can be visually recognized.
The intraoral X-ray according to any one of claims 1 to 8, wherein the holding portion has a support wall with which the X-ray photoconductor contacts in a planar shape, and the support wall has a cross shape. Shooting device.
The area of the holding part is smaller than the area of the X-ray photosensitive member, and when the X-ray photosensitive member is held by the holding part, a part of the X-ray photosensitive member protrudes from the holding part. The device for intraoral X-ray imaging according to any one of 1 to 9.
11. The upper jaw side contact portion and the lower jaw side contact portion have a rigidity that does not change the relative position and posture of both when chewed with a normal force. Device for intraoral radiography.
The intramaxillary radiography according to any one of claims 1 to 11, wherein the upper jaw side contact portion and the lower jaw side contact portion leave a bite mark when they are bitten with a normal force. device.
The device for intraoral X-ray imaging according to any one of claims 1 to 12, wherein the width of the upper jaw side contact portion and the lower jaw side contact portion is 10 mm to 20 mm.
The intraoral X-ray imaging device according to any one of claims 1 to 13, wherein the distance between the upper jaw side contact portion and the lower jaw side contact portion is 5 mm to 20 mm.
The holding unit has a support wall with which one surface of the X-ray photoconductor contacts, and a side holding unit that holds the side of the X-ray photoconductor, and the side holding unit contacts the other surface of the X-ray photoconductor. The intraoral X-ray imaging device according to claim 1, further comprising a support portion.
The intraoral X-ray imaging device according to claim 15, wherein the other surface support portion is integrated with the support wall and is folded back to the support wall side.
An intraoral X-ray imaging device used when an X-ray photoconductor is placed in the mouth and the teeth of the upper and lower jaws are X-rayed,
A holding part for holding the X-ray photosensitive member, and a fixing part sandwiched between the upper jaw side teeth and the lower jaw side teeth,
The holding unit holds a rectangular X-ray photoconductor having upper and lower sides and left and right sides, a left and right side holding unit holding the left and right sides of the X-ray photoconductor, and an upper and lower sides of the X-ray photoconductor. A central region of the X-ray photosensitive member on the upper or lower teeth of the user in a state where the upper and lower sides of the X-ray photosensitive member are in contact with the stopper. Will face,
The area of the holding unit is smaller than the area of the X-ray photoconductor, and when the X-ray photoconductor is held by the holding unit, a part of the X-ray photoconductor protrudes from the holding unit and the corner of the X-ray photoconductor is detected. It is possible to visually recognize the presence of the X-ray photoconductor from the back side of the support wall with a missing part at a position corresponding to the part,
The fixing portion extends in a direction intersecting the imaging surface of the X-ray photosensitive member held by the holding portion,
The fixing portion includes an upper jaw side contact portion that comes into contact with an upper jaw side tooth or gum, and a lower jaw side contact portion that comes into contact with a lower jaw side tooth or gum, and the upper jaw side contact portion and the lower jaw side contact portion. The part has a rigidity that does not change the relative position and posture of the two when chewed with normal force, and the hardness of the bite remains when chewed with normal force. And the width of the lower jaw side abutting portion is 10 to 20 mm, and the upper jaw side abutting portion and the lower jaw side abutting portion are separated from each other by 5 mm to 20 mm, and the fixing portion is held between the upper jaw side teeth and the lower jaw side teeth. A device for intraoral X-ray imaging, in which an X-ray photoreceptor held by a holding unit is visible from outside the mouth.
18. The intraoral X-ray imaging device according to claim 2, wherein the stopper has elasticity capable of pressing and supporting the X-ray photosensitive member.
The stopper has one end fixed to the holding part, the other end extending upward along the holding part, and the narrowest part closest to the holding part and the most protruding part that is farthest from the holding part in the middle 19. The intraoral X-ray imaging device according to claim 18, wherein the narrowest portion presses the X-ray photoreceptor.
20. The intraoral X-ray imaging device according to claim 19, further comprising an inclined surface or a curved surface between the narrowest portion and the other end of the stopper.