WO2011083932A2

WO2011083932A2 - Angle-indicating film holder for intraoral radiography, and disposable component for the film holder

Info

Publication number: WO2011083932A2
Application number: PCT/KR2010/009517
Authority: WO
Inventors: 최영진
Original assignee: Choi Young Jin
Priority date: 2010-01-11
Filing date: 2010-12-29
Publication date: 2011-07-14
Also published as: KR20110082448A; WO2011083932A3; KR101098860B1

Abstract

The invention relates to a film holder for periapical radiography for obtaining radiographs of intraoral teeth and of a teeth support structure, comprising: a bite unit to be temporarily fixed at teeth; and a film support unit rotatably mounted on the bite unit, and located at the tongue side of the teeth in the mouth, wherein the bite unit comprises a bite body to be bitten by the teeth so as to be fixed at the teeth; and a central shaft horizontally inserted into the side surface of the bite body, wherein the bite body comprises a first teeth contact surface contacted by an upper or lower tooth, and a second teeth contact surface contacted by the other one of the upper and lower tooth. The film support unit comprises: a shaft-receiving portion which accommodates the central shaft, and which is rotatably arranged; and a film support plate physically connected to the shaft-receiving portion so as to rotate around the bite body. The end of the film support plate, which is closer to the central shaft, is maintained at a position closer to the central shaft than at least one of the first and second teeth contact surfaces, thus structurally maintaining the end of the film support plate at the position closer to the central shaft without extension.

Description

Angle indicator film holder for intraoral radiography and disposable accessories for the film holder

The present invention relates to a film holder for fixing a film positioned in the oral cavity for an apical radiograph to obtain a radiographic image of the intraoral teeth and the tooth support structure, and more particularly, the film for the long axis of the tooth in the oral cavity. The present invention relates to a film holder for intraoral radiography and a disposable accessory applicable to the film holder, the angle of which can be easily identified from the outside, and which can guide the radiation centerline irradiation angle.

Photographic images of apical radiographs taken for dental treatment include equilibrium and isometric methods. 1 is a cross-sectional view for comparing a conventional parallel imaging method and an isometric imaging method, (a) shows a parallel imaging method, (b) shows an isometric imaging method.

Referring to FIG. 1, the parallel imaging method is a method in which a film is positioned in the oral cavity but the film is positioned parallel to the long axis of the tooth. The tooth image of the photograph obtained by photographing by placing the film parallel to the long axis of the tooth is almost one-to-one with the actual tooth. However, because the space in the oral cavity is small and low, it is difficult to position the film parallel to the long axis of the tooth. Also, use a long cone of about 12 to 16 inches to keep the distance between the source and the tooth as far as possible to minimize image distortion, maintain the distance between the source and the tooth, and guide the direction of the radiation centerline. Sometimes.

The isometric method is a method of photographing by irradiating the radiation center line perpendicular to the line that bisects the long axis of the tooth and the angle formed by the film. In the isosceles triangle, the hypotenuses on both sides have the same length, and the tooth image of the photograph also obtained by photographing may have a size one-to-one with the actual tooth. Of course, it is relatively less restricted in the oral cavity than parallel imaging, but also the angle at which the film is fixed can be arbitrarily changed by the anatomical structure, and it is still difficult to accurately photograph the teeth at some predetermined angles recommended in the textbook. There is this.

In this regard, U.S. Patent No. 5,737,388 relates to "DIGITAL INTRAORAL X-RAY PHOTOGRAPHY METHOD AND HOLDER FOR PICTURE PLATE OR X-RAY FILM," which has a film holder, bite portion and alignment rod. It contains three linked parts. Although there are scales to measure angles, they are not practically convenient because they must be angled before being bitten by the patient's mouth.

Korean Laid-Open Patent Publication No. 2005-29047 relates to an "alignment apparatus for X-ray imaging applying anatomical oral structure", which aims to minimize pain in consideration of the oral structure of a human body. The photographing alignment device has a connection structure that allows various combinations of the ring and the alignment rod according to the inclination angle, but only a few combinations that are structurally determined are not possible, and the problem of not being able to appropriately respond to various oral structures of the patient. have.

In addition, Korean Patent Publication No. 10-920848 of the applicant, such as the present application relates to an "angle indicating film holder for intraoral radiography", Figure 2 is an exploded perspective view of the conventional film holder, Figure 3 It is a side sectional view explaining the process of performing an isometric photographing method using the film holder of 2.

Referring to FIGS. 2 and 3, the film holder 100 is positioned in the oral cavity for supporting an apical radiograph to obtain a radiographic image of an intraoral tooth and a tooth support structure, and includes a bite part 110. , A film support 130, a film indicator 140, and a radiation indicator 150. The bite part 110 is fixed between the teeth and the teeth by the closing operation of the mandible, the film support 130 and the film indicator 140 is moved together with respect to the bite portion 110 while moving together, the bite indicator 160 ) And the rotational positional relationship between the film indicating unit 140 and the film support unit 130 with respect to the bite unit 110 can be recognized to the outside. To this end, the film support 130 and the film indicator 140 is rotated about the same axis, the central axis 120 in the present embodiment.

The bite section 110 includes a bite body 112 and a central axis 120. The bite body 112 is temporarily fixed between the teeth and the teeth by the mandatory closing of the mandible, the bite body 112 is formed with a shaft hole 114 penetrating horizontally, the center through the shaft hole 114 An axis 120 is provided.

The film support 130 is rotatably mounted to the bite body 112. The film support 130 includes a film support plate 132 and an elastic fixing piece 134, and both ends of the film support plate 132 accommodate both sides of the bite body 112. The central shaft 120 penetrates the extension 133 and the bite body 112 of the film support plate 132 while the film support 130 accommodates both sides of the bite body 112, and the film support 130 ) May be rotatably mounted to the bite unit 110.

One side of the film support 130 extends along the central axis 120 from the bite body 112, and the central axis 120 is accommodated in the extended receiving portion 135 of the film support 130. The film indicating unit 140 extends in the shape of a rod to an end portion of the film support 130.

The end of the central axis 120 is exposed from the extended end of the film support 130, the irradiation indicator 150 and the bite indicator 160 is assembled to the exposed portion. An end of the bite indicating unit 160 with respect to the central axis 120 also includes a rectangular hole, and the central axis 120 also has a portion having a rectangular cross section corresponding to the rectangular hole. On the other hand, a circular hole is formed at the end of the radiation indicating unit 150 corresponding to the central axis 120, and may be rotated and fixed at a predetermined angle with respect to the central axis 120 separately from other indicating units.

Referring to FIG. 3, after the user mounts the appropriate film 10 on the film support 130 of the film holder 100, the user places the film support 130 in the oral cavity of the patient and causes the patient to bite 110. The bite body 112 is made to bite into the tooth. The bite body 112 may maintain a state perpendicular to the long axis of the tooth because a plurality of teeth are bited up and down, and may be assumed to be fixed to a plane approximately perpendicular to the long axis of the tooth.

The user can find the optimum angle by rotating the film indicator 140 exposed to the outside up and down. Preferably, rotation of the tooth long axis and the film in a direction close to parallel may further minimize distortion by the isometric method. At this time, the angle of the film support 130 is not determined and may vary depending on the oral structure of the patient and the selected film support plate. At this time, since the film support 130 rotates up and down together with the film indicator 140, the most suitable position can be found in the oral cavity of the patient.

Once the most appropriate position is determined, the angle between the byte indicator 160 and the film indicator 140 can be read through the scale. Referring to this angle, the user can easily determine the irradiation angle of the radiation center line. As described above, when the conformal imaging method is used, the user measures the angle 2a between the byte indicating unit 160 and the film indicating unit 140, and then the byte indicating unit 160 or the film indicating unit 140 and the irradiation indicating unit ( 150 may be adjusted to be divided by a bisected angle (a).

According to the isometric imaging method, the angle parallel to the irradiation instruction unit 150 may be referred to as an angle according to the isometric imaging method, and the user may adjust the irradiation angle of the radiation center line with reference to the irradiation instruction unit 150.

The present invention provides a film holder having a bite portion and a film support of an improved structure compared to a conventional film holder.

According to the present invention, the film support is mounted on the bite immediately without the extension, so that the rotation of the extension by the surrounding teeth does not occur, and both sides of the bite part are positioned when the film holder is placed in the oral cavity and the film holder is placed in the oral cavity. Provided by the extension formed in the film holder to prevent the patient from experiencing discomfort.

The present invention has a structure that can facilitate the replacement of the film support plate and the bite portion, and provides a film holder that can give comfort to the patient during imaging.

The present invention can substantially match the center of the film support plate and the center of the tooth to be photographed, and provides a film holder having a structure that can closely contact the surface that responds to radiation or the irradiation surface in the film as close to the teeth as possible do.

According to an exemplary embodiment of the present invention, the film holder according to the present invention is for apical radiographs to obtain a radiographic image of the intraoral teeth and the tooth support structure, the bite portion temporarily fixed to the teeth and the A film holder rotatably mounted relative to a bite and having a film support positioned in the lingual side of the tooth in the oral cavity.

Specifically, the bite portion has a bite body which is fixed by the bite of the teeth, and a central axis mounted horizontally on the side of the bite body, the bite body is coupled to the first tooth binding surface and the other tooth to be bonded to one tooth And a second tooth engagement surface. In addition, the film support includes a shaft receiving portion that is rotatably mounted to receive the central axis and a film support plate that is physically engaged with the shaft receiving portion and pivots around the bite body. In particular, the proximal end closer to the bite body of the film support plate is closer to the center of the central axis than at least one of the first and second tooth engagement surfaces, so that an extension between the film support plate and the shaft receiving portion is not necessary, and thus the periphery caused by the extension. It is possible that only one side of the film support plate is connected by the shaft accommodating portion without rotation limitation of the film support plate caused by the teeth.

Further, in the positional relationship between the film support plate and the central axis, the center axis is substantially involved in the front surface of the film mounted on the film support plate, thereby minimizing distortion of the image by radiographic imaging.

In addition, the film support plate moves more relaxedly in the oral cavity such that the central axis is provided on the lingual side than the center of at least one of the first and second tooth engagement surfaces, that is, the central axis is located on the lingual side rather than the center of the bite body. You can also

Therefore, the tooth to be photographed can be directly snapped onto the first tooth engagement surface, and the film support plate and the film can be approached inside the lingual side adjacent to the bite body to capture an accurate image.

According to another exemplary embodiment of the present invention, a disposable accessory for the film holder of the present invention may be provided. The disposable accessory may be detachably mounted in the film holder of the present invention through the central axis and the shaft receiving portion, the central axis part is connected to the central axis, the central axis part is integrally connected and fixed by the bite of the teeth. And a film supporting plate which is integrally connected to the shaft receiving part and the shaft receiving part which is axially connected to the shaft receiving part and pivots around the bite body. As specified in the film holder of the present invention, even in the disposable accessory according to the present embodiment, the bite body has a first tooth engagement surface coupled with one tooth and a second tooth engagement surface coupled with the other tooth, and the film The proximal end of the support plate may maintain a distance closer to the central axis than the first and second tooth engagement surfaces.

Depending on the patient, the bite part and the film support can be replaced for one-time use, which is hygienic, and the device can be used efficiently by replacing the bite part and the film support plate suitable for each tooth depending on whether the tooth to be photographed is in the anterior or posterior part. .

The film holder of the present invention may have a bite portion and a film support of an improved structure compared to a conventional film holder. Specifically, the film support plate is mounted to the bite section immediately without an extension, so that the rotation of the film support plate is not limited by the surrounding teeth, and the film support plate and the central axis are bound to only one side of the bite portion so that the patient does not experience inconvenience when shooting. Can be.

The film holder of the present invention has a structure that facilitates the replacement of the film support plate and the bite part, and the bite part and the film support part having a suitable structure can be selected according to the teeth of the anterior part and the posterior part as well as the hygienic use through the disposable accessories. .

The film holder of the present invention can generally coincide with the center of the film support plate and the center of the tooth to be photographed, and the surface responding to radiation in the film can be brought into close contact with the teeth as close as possible to obtain an accurate and distortion-free image. .

According to the film holder of the present invention, the patient's unique film support angle can be recognized and adjusted outside the mouth even when the patient opens the bite body of the film holder in response to various oral structures of the patient.

According to the present invention, the change of the angle of the film support in the oral cavity can be immediately known from the outside through the analog or digital film indicator, and the angle of the film support can be immediately known from the outside, so that the radiation centerline irradiation angle can be quickly specified and the radiation source Can be placed.

1 is a cross-sectional view for comparing a conventional parallel imaging method and an isometric imaging method.

2 is an exploded perspective view of a conventional film holder.

3 is a side cross-sectional view illustrating a process of performing an isometric photographing method using the film holder of FIG. 2.

4 is a perspective view of a film holder according to an embodiment of the present invention.

5 is an exploded perspective view of the film holder of FIG. 4.

FIG. 6 is a rear perspective view illustrating the film support plate in the film holder of FIG. 4. FIG.

FIG. 7 is a rear view for describing the bite part in the film holder of FIG. 4. FIG.

8 is a side cross-sectional view illustrating a process of performing an isometric photographing method using the film holder of FIG. 4.

9 is a perspective view of a film holder according to another embodiment of the present invention.

10 is an exploded perspective view of the film holder of FIG. 9.

FIG. 11 is a rear perspective view illustrating the film support plate in the film holder of FIG. 9. FIG.

FIG. 12 is a rear perspective view for describing the bite part in the film holder of FIG. 9. FIG.

13 is a view for explaining a film holder and a disposable accessory for the film holder according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by referring to the contents described in the other drawings under these rules, and the contents determined to be obvious to those skilled in the art or repeated may be omitted.

4 is a perspective view of a film holder according to an embodiment of the present invention, Figure 5 is an exploded perspective view of the film holder of FIG.

4 and 5, the film holder 200 is positioned in the oral cavity to support the film for the apical radiography to obtain a radiographic image of the intraoral teeth and the tooth support structure. , A film support 230, a film indicator 240, and a radiation indicator 250. The bite portion 210 is fixed between the teeth and the teeth by the closing action of the mandible, the film support 230 and the film indicator 240 is moved together with respect to the bite portion 210 while moving together, the bite indicator 260 ) And the rotational positional relationship between the film indicating unit 240 can be made to recognize the rotation angle of the film support unit 230 with respect to the bite unit 210 to the outside. To this end, the film support 230 and the film indicator 240 is integrally rotated about the same axis, in this embodiment the central axis 220.

Specifically, the bite unit 210 includes a bite body 212 and the central axis 220. The bite body 212 is temporarily fixed between the tooth and the tooth by the closing action of the mandible and can be immediately separated by the opening action of the mandible. The first tooth binding surface 214 is formed as a surface where the bite body 212 meets the tooth to be photographed, and the second tooth binding surface 216 is formed as a surface where the tooth is opposite to the tooth to be photographed. In the present embodiment, the first and second tooth engagement surfaces 214 and 216 may be formed of elastic resin or rubber, and may be formed of protrusion lines or uneven lines having a triangular or trapezoidal cross section. Accordingly, the first and second tooth engagement surfaces 214 and 216 can stably be in close contact with the teeth without slipping, and can minimize the case where the measurement value is changed due to the movement of the bite portion 210 during the imaging. In particular, the teeth of the anterior teeth is narrow because the tooth surface in contact with each other can be easily displaced bite position of the bite portion 210, even if the mandible moves a little, by forming an uneven can limit this displacement of the bite portion 210. At this time, the direction of the uneven line of the first and second tooth engagement surface (214, 216) is preferably formed to be substantially parallel to the direction of the arrangement of the teeth, that is, the central axis (220).

For reference, the bite body 212 according to the present embodiment is for photographing the posterior part, and the second tooth binding surface 216 is formed to be inclined with respect to the first tooth binding surface 214, and moves opposite to the central axis. The bite body 212 may be formed to be thinner. Therefore, the bite body 212 can be easily inserted in the molars where the molar is located, and the film holder 200 is suitable for measuring the upper right posterior part or the lower left posterior part of the posterior part. Of course, it can also be formed to be mirror symmetrical so as to be suitable for the left posterior part of the upper jaw or the right posterior part of the mandible.

The central axis 220 extends horizontally in the bite body 212. As will be described later, the central axis 220 may have a portion having a partially circular cross section, or may have a portion having a non-circular and square cross section for fixing with another component.

The film support 230 is rotatably mounted relative to the bite body 212. Specifically, the film support 230 includes a film support plate 232 and the shaft receiving portion 235, the shaft receiving portion 235 is connected to the film support plate 232 to one side in the state receiving the central axis 220 do. Therefore, the shaft receiving unit 235 physically connects the film indicating unit 240 and the film support plate 232, the film indicating unit 240 may display the rotation angle of the film support plate 232, and the user may use the film indicating unit ( By rotating 240, the rotation angle of the film support plate 232 may be adjusted in addition to the oral cavity.

A fastening part 236 is formed at one side of the film support plate 232, and the film support plate 232 may be detachably mounted to the shaft receiving part 235 through the fastening part 236. The user can attach a digital film or the like to the film support plate 232, and can assemble the film support plate 232 to the shaft receiving portion 235 together with the mounted film. In addition, unlike the film holder shown in FIGS. 2 and 3, in the film holder 200 according to the present embodiment, only one side of the film support plate 232 is connected to the shaft receiving portion, and the front surface of the film support plate 232. It is located so as to involve this substantially central axis 220, and even if the film support plate 232 rotates, the fastening part 236 etc. can be prevented from touching a tooth.

The film indicator 240 extends in the shape of a rod to an end of the film support 230. The film indicator 240 is preferably spaced apart from the bite body 212 by a predetermined distance, i.e., the bite body 212 is not disturbed by the face of the patient, assuming that the bite body 212 is bitten by the teeth.

An end portion of the central shaft 220 is exposed from the end portion of the shaft receiving portion 235, and the bite indicating portion 260 and the radiation indicating portion 250 are assembled into the exposed portion. The end of the bite indicator 260 also includes a rectangular hole corresponding to the rectangular cross section of the central axis 220, and the circular hole is also formed at the end of the irradiation indicator 250 corresponding to the outermost circular cross section of the central axis 220. Is formed. A screw-shaped fixing cap 222 may be formed at the end of the central shaft 220, and the pressure between the film support 230, the radiation indicating unit 250, and the bite indicating unit 260 is fixed through the fixing cap 222. Interlocking can be adjusted. In this case, the film support 230, the radiation indicating unit 250, and the bite indicating unit 260 are fixed by friction about the central axis 220. According to another embodiment, the projections around the central axis to increase the frictional force, etc. Can be formed.

The film indicating unit 240 or the byte indicating unit 260 may be formed with a scale 262 for expressing an angle, and by measuring the angle between the byte indicating unit 260 and the film indicating unit 240, the byte unit 210 and The angle between the film supports 230 can be measured in real time.

In the present embodiment, the film indicator 240 is simply provided in a rod shape extending in the vertical direction from the central axis 220, but alternatively has a rotating part corresponding to the rotation of the central axis to sense and digitize the rotation of the rotating part. It may be provided as a display unit expressing in a fashioned manner.

The radiation indicating unit 250 is for predicting and guiding the irradiation angle of the radiation center line in advance. In this embodiment, the radiation indicating unit 250 is provided in a rod shape, and when provided in a rod shape, an aming guide thereon. 290 is slidably mounted. The aming guide 290 may be in close contact with the irradiation part of the radiation source, and the dentist or dental hygienist may easily position the radiation source by moving and fitting the irradiation part of the equipment installed in the predetermined aming guide 290. Of course, a variety of means for adjusting the irradiation angle and direction of the radiation source can be used.

6 is a rear perspective view illustrating the film support plate in the film holder of FIG. 4, and FIG. 7 is a rear view illustrating the bite portion in the film holder of FIG. 4.

Referring to FIG. 6, the film accommodating part 233 is formed on the rear surface of the film support plate 232. The film accommodating part 233 is for accommodating an analog or digital type film. In the case of a digital type film, the film irradiating surface of the film is accommodated in the film accommodating part 233 while the film supporting plate 232 is applied to the irradiating surface. It can be mounted to face the radiation generator. In general, since the digital type film is connected to the rear by wires, a structure of a separate support plate for wire connection is required, but in the present embodiment, the film is mounted on the rear side of the film support plate 232 so that the film can be kept flat in front. It is also easy to install. In addition, by removing the opposite edges of the bite body side proximal end of the film support plate 232 in an oblique form, detachment can be facilitated, and the front of the film, that is, the irradiation surface can be positioned closer to the tooth.

In addition, the locking jaw 234 may be formed at the peripheral edge of the film accommodating part 233, and two or more locking jaws 234 may be formed to secure the film in the film accommodating part 233. have.

For reference, in this embodiment, the front surface of the film support plate 232 is blocked, but in some cases the front surface of the film support plate 232 may be provided in an open form, the support frame of the frame frame shape for fixing the film This may be provided.

Referring to FIG. 7, the bite body 212 has a structure that becomes thinner toward the opposite side of the central axis 220, which may be referred to to facilitate insertion of the bite body 212 in the posterior portion. The first tooth engagement surface 214 and the second tooth engagement surface 216 are each formed with an uneven line having projections of a triangular cross section, and at the end of the central axis 220 has a rectangular cross section and a circular cross section. The part is formed.

Referring to FIG. 8, after the user mounts the appropriate film 20 on the film support 230 of the film holder 200, the user places the film support 230 and the bite portion 210 in the oral cavity of the patient and moves the patient to the patient. This causes the bite body 212 of the bite portion 210 to bite. The bite body 212 can maintain a state perpendicular to the long axis of the teeth because the plurality of teeth are bited up and down, and roughly parallel to the width direction of the teeth by the irregularities of the tooth binding surface. It can be assumed that it is fixed perpendicular to the central axis of the tooth.

The user can find the optimum angle by rotating the film indicator 240 exposed to the outside up and down. Preferably, rotation of the tooth long axis and the film in a direction close to parallel may further minimize distortion by the isometric method. For reference, in the present embodiment, the first tooth binding surface 214 in contact with the target tooth is formed to have a shorter length than the second tooth binding surface 216 in contact with the opposing teeth, and the central axis 220 is the first tooth binding surface. 214 is provided inwardly, ie lingual. Therefore, since the rotation center is located in the oral cavity, the film support plate 232 can be easily moved in the oral cavity.

As shown, since the proximal end of the film support plate 232 is located closer to the center of the central axis than the first tooth engagement surface 214, between the first tooth engagement surface 214 and the second tooth engagement surface 216. A curved surface is formed to eliminate interference, which may roughly correspond to a movement trajectory near the film support plate 232.

At this time, the angle of the film support 230 is not determined and may vary depending on the oral structure of the patient and the selected film support plate. In this case, since the film support 230 rotates up and down together with the film indicator 240, the most suitable position can be found in the oral cavity of the patient.

Once the most appropriate position is determined, the scale can read the angle between the byte indicator 260 and the film indicator 240. Referring to this angle, the user can easily determine the irradiation angle of the radiation center line. As described above, when the conformal imaging method is used, the user measures the angle 2a between the byte indicating unit 260 and the film indicating unit 240, and then the byte indicating unit 260 or the film indicating unit 240 and the radiation indicating unit ( 250 may be adjusted so as to spread by a bisected angle (a).

According to the isometric imaging method, the angle parallel to the irradiation instruction unit 250 may be referred to as an angle according to the isometric imaging method, and the user may adjust the irradiation angle of the radiation center line with reference to the irradiation instruction unit 250.

9 is a perspective view of a film holder according to another embodiment of the present invention, Figure 10 is an exploded perspective view of the film holder of FIG.

9 and 10, the film holder 300 is for obtaining a radiographic image of a tooth and a tooth support structure in the anterior part of the oral cavity, which is also a bite part 310, a film support part 330, and a film indicating part ( 340, and a radiation indicating unit 350.

In detail, the bite part 310 includes a bite body 312 and a central axis 320. Since the distance between the upper and lower teeth in the anterior portion during opening of the mandible is longer than the distance between the upper and lower teeth of the posterior tooth, the bite body 312 for the anterior portion is higher in height than the bite body 212 for the posterior portion.

The bite body 312 includes a first tooth engagement surface 314 for teeth to be photographed and a second tooth engagement surface 316 for antagonists of the teeth to be photographed. In the present exemplary embodiment, the first and second tooth engagement surfaces 314 and 316 may be formed of an elastic resin or rubber, and may be formed of a protrusion line or an uneven line having a triangular or trapezoidal cross section. Therefore, even though the occlusal surface is very narrow like the teeth of the anterior part, the first and second tooth engagement surfaces 314 and 316 can be stably in close contact with the teeth without slipping. It can be minimized if it changes.

The central axis 320 extends horizontally in the bite body 312. As will be described later, the central axis 320 may have a portion having a partially circular cross section, or a portion having a non-circular or square cross section for fixing with another component.

The film support 330 is rotatably mounted relative to the bite body 312. Specifically, the film support 330 includes a film support plate 332 and the shaft receiving portion 335, the shaft receiving portion 335 is connected to the film support plate 332 to one side in the state receiving the central axis 320 do. Therefore, the shaft receiving unit 335 physically connects the film indicating unit 340 and the film support plate 332, the film indicating unit 340 may display the rotation angle of the film support plate 332, and the user may use the film indicating unit ( The rotation angle of the film support plate 332 may be adjusted in addition to the oral cavity by rotating the 340.

A fastening part 336 is formed at one side of the film support plate 332, and the film support plate 332 may be detachably mounted to the shaft receiving part 335 through the fastening part 336. In addition, the film support plate 332 is provided vertically long so that the long axis of the film is located vertically, it is arranged so that the long axis of the film is perpendicular to the central axis (320).

The user may mount a digital film or the like on the film support plate 332. The connection wire of the mounted film is directed toward the bite body 312, and the wire is attached to the bite body 312 and the second tooth engagement surface 316. By forming a groove 318 for passing through the wire through the back of the bite body 312 can be easily drawn out through the second tooth binding surface 316, the damage of the wire by the teeth in the mandible closing Can be prevented.

In addition, unlike the film holder shown in FIGS. 2 and 3, in the film holder 300 according to the present embodiment, only one side of the film support plate 332 is connected to the shaft receiving portion and corresponds to the connection portion 133. Since there is no, it is possible to prevent the rotation of the film support 330 by the other teeth around the anterior portion.

The film indicator 340 extends in the shape of a rod to the end of the film support 330, and the bite indicator 360 and the radiation indicator 350 are sequentially mounted to the end of the central axis 320.

The film indicator 340 or the film support 330 may be formed with a scale 362 for expressing the angle, by measuring the angle between the bite indicator 360 and the film indicator 340, and the bite portion 310 and The angle between the film support parts 330 can be measured in real time. Of course, the scale 362 for measuring the angle may be formed in the byte portion 310 or the byte indicating portion 360.

The radiation indicating unit 350 is for predicting and guiding the irradiation angle of the radiation center line in advance. In this embodiment, the radiation indicating unit 350 is provided in a rod shape, and when provided in a rod shape, an aming guide thereon. 390 is slidably mounted.

FIG. 11 is a rear perspective view illustrating the film support plate in the film holder of FIG. 9, and FIG. 12 is a rear perspective view illustrating the bite portion in the film holder of FIG. 9.

Referring to FIG. 11, the film accommodating part 333 is formed on the rear surface of the film support plate 332. The film accommodating part 333 is for accommodating an analog or digital film, and the film support plate 332 is also vertically disposed corresponding to the long axis of the film. Also, by removing diagonally opposite edges of the bite portion of the film support plate 332 for anterior imaging, the front side of the film can be positioned closer to the teeth. In addition, the locking jaw 334 may be formed at the peripheral edge of the film accommodating part 333, and two or more locking jaws 334 having various sizes and shapes may be formed to securely fix the film in the film accommodating part 333. I can do it.

Referring to FIG. 12, the tooth engagement surfaces 314 and 316 in the bite body 312 include an uneven line formed parallel to the width direction of the tooth, and the bite body 312 and the second tooth engagement surface 316 By forming a groove in the closing can be easily passed through the wire by the tooth without damage.

After the user mounts the digital type film on the film support 330 of the film holder 300, the user places the film support 330 between the anterior teeth of the patient and causes the patient to bite the body 312 of the bite portion 310. Can bite into the teeth. Since the bite body 312 is bound by the unevenness of the

tooth binding surfaces

314 and 316, it can be fixed without shaking, and the physics adjusts the position of the unevenness so that the central axis of the tooth is perpendicular to the bite portion 310. I can regulate it.

13 is a view for explaining a film holder and a disposable accessory for the film holder according to another embodiment of the present invention. For reference, the following description is based on the structure of the film holder for the posterior part shown in FIG. 4, but may be applied to the structure of the film holder for the anterior part shown in FIG. 9 in some cases.

Referring to FIG. 13, the film holder 400 is for obtaining a radiographic image of a tooth and a tooth support structure in the anterior portion of the oral cavity, and is a disposable accessory mounted on the film holder body 401 and the film holder body 401 ( 402). Overall, the disposable accessory 402 includes a bite portion 410, a central axis part 420-2, an axis receiving part part 435-2, and a film support plate 432, wherein the film holder body 401 has a central axis. 420, the shaft receiving portion 435, the film indicating portion 440, and the irradiation indicating portion 450.

The bite portion 410 is provided by connecting the bite body 412, the central axis part 420-2, and the central axis 420. The bite body 412 includes a first tooth engagement surface for teeth to be photographed and a second tooth engagement surface 416 for antagonists of the teeth to be photographed. The central axis part 420-2 extends horizontally in the bite body 412. An accommodating groove 425 is formed at an end of the central axis part 420-2 corresponding to a fixing protrusion 424 formed at the end of the central axis 420, and the center axis 420 and the center are formed around the accommodating groove 425. Constraints and grooves may be formed to constrain the rotation of the shaft part 420-2.

The shaft receiving part 435-2 is provided on the side of the film support plate 432, and the shaft receiving part 435-2 also receives the central axis part 420-2, and the film holder body 401 It may be engaged with the shaft receiving portion 435.

In the film holder main body 401 according to the present embodiment, the shaft receiving portion 435 is formed to be relatively shorter than the central axis 420 so that the central axis 420 is exposed to the outside. It may be formed in the same length.

In addition, the coupling structure between the film holder body 401 and the disposable accessory 402 can be variously changed under conditions that maintain the concentric structure between the central axis and the shaft receiving portion. For example, as shown in the figure, the axial separation between the central axis and the shaft receiving portion may be limited by the connecting structure of the central axis, but may also be limited by the connecting structure of the shaft receiving portion.

In some cases, only the bite body and the film support plate are disposable for positioning the receiving groove corresponding to the fixing projection of the central axis in the bite body. In this case, the connection portion connected to the shaft receiving portion in the film support plate can be omitted.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

The angle indicating film holder for intraoral radiography according to the present invention and the disposable accessory for the film holder can be used to take an apical radiograph to obtain a radiographic image of the intraoral teeth and the tooth support structure.

Claims

For apical radiographs to obtain radiographic images of intraoral teeth and tooth support structures, a bite part temporarily fixed to the tooth and a film rotatably mounted to the bite part and positioned on the lingual side of the tooth in the oral cavity In the film holder having a support,

The bite portion has a bite body which is fixed by the bite of the tooth, and a central axis mounted horizontally on the side of the bite body, the bite body is the first tooth engaging surface and the other teeth to be engaged with the other teeth 2 teeth engagement surface

The film support portion includes a shaft receiving portion for receiving the central axis and rotatably mounted and a film support plate that is physically engaged with the shaft receiving portion and pivots around the bite body,

And a near end of the film support plate maintains a distance closer to the central axis than at least one of the first and second tooth engagement surfaces.
The method of claim 1,

And a plane of film by said film support plate is provided to involve said central axis.
The method of claim 1,

And the central axis is provided on the lingual side rather than the center of at least one of the first and second tooth engagement surfaces.
The method of claim 1,

The film support plate provides a receiving portion for accommodating the film on the back, the film holder, characterized in that the engaging jaw is formed on the corner of the receiving portion.
The method of claim 1,

An edge of the film support plate opposite the bite body is removed in an oblique direction.
The method of claim 1,

The film holder, characterized in that the curved surface corresponding to the movement trajectory of the near end of the film support plate is formed between the first tooth binding surface and the second tooth binding surface.
The method of claim 6,

When targeting teeth in the anterior tooth in the oral cavity, the long axis of the film received in the receiving portion is disposed perpendicular to the central axis, the bite body back and the second tooth for electrical connection between the film and an external device Film holder, characterized in that the groove is formed on the binding surface.
The method of claim 6,

In the case of targeting teeth in the oral cavity in the oral cavity, the long axis of the film accommodated in the receiving portion is disposed parallel to the central axis, and the bite body has the second tooth engagement surface with respect to the first tooth engagement surface. Film holder, characterized in that formed inclined.
The method of claim 6,

The first tooth binding surface is in contact with the tooth to be photographed film holder, characterized in that formed in a shorter width than the second tooth binding surface.
The method of claim 1,

And the first and second tooth engagement surfaces have elastic projection lines having a triangular or trapezoidal cross section formed to correspond in parallel to the width of the teeth being bitten.
The method of claim 1,

And the bite body and the film support plate are replaceably mounted via the central axis and the shaft receiving portion, respectively.
The method of claim 1,

It is rotatably mounted with respect to the bite portion and rotates in conjunction with the film support portion, and positioned outside the oral cavity further comprises a film indicator for adjusting the angle of the film support portion in the state that the bite portion is fixed to the tooth,

The bite portion or the film indicating portion is provided with a scale for referring to the angle of the film indicating portion, and further comprising a byte indicating portion for indicating a fixed angle of the bite portion corresponding to the film indicating portion, the byte indicating portion is the center A film holder, which is fixed about an axis.
The method of claim 12,

And a radiation indicator that is rotatably mounted about the central axis independently of the film indicator at an end of the central axis.
The method of claim 13,

And a radiation guide for assisting the aiming of the radiation source and a radiation blocking part for allowing only a specific area to pass the radiation.
A disposable accessory detachably mounted in a film holder according to any one of claims 1 to 14 via a central axis and a shaft receiving portion,

A central axis part axially connected with the central axis;

A bite body connected integrally with the central axis part and fixed by bite of a tooth;

A shaft accommodating part coupled to the shaft accommodating part; And

And a film support plate integrally connected with the shaft receiving part and pivoting around the bite body.

The bite body has a first tooth engagement surface coupled with one tooth and a second tooth engagement surface coupled with the other tooth,

The proximal end of the film support plate maintains a distance closer to the central axis than the first and second tooth engagement surfaces.