JPH0435650A - Head fixing device of pantomorphic x-ray photography device - Google Patents

Abstract

PURPOSE:To take an X-ray picture without distorting the joint position of jaws by fixing the head of a person to receive medical check by inserting the ear pieces of ear rods hung from the upper part at the left and right sides of the person to check in his ears. CONSTITUTION:After the head of a person 13 to receive the medical check is fixed on a table 9, an X-ray generator 1 and a film cassette holder 2 are moved and rotated around the face of the person 13 drawing an oval path to take a pantomorphic X-ray picture. When the X-ray picture is taken from the side of the joint position of jaws of the person 13, a head rod is displaced with an ear rod 44, and the ear rod 44 is installed to a joint plate 41. And the ear rods 44 at the left side and the right side are slided by a lever to insert the ear pieces of the ear rods 44 in the ears of the person 13. Then, the X-ray generator 1 and the film cassette holder 2 are moved and rotated to photograph only the joint position of jaws.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to a pantomo
The present invention relates to a head fixation device for radiography equipment.

<Prior Art> There has been a pantomo X-ray imaging device used for dental treatment, and an overview thereof is shown in FIG. 12.

In the figure, a support 6 for the head case 5 is fitted into a hollow support 8 erected on a base plate 7, and the head case 5 is moved up and down by a mechanism (not shown).

Further, on the lower surface of the head case 5, an arm 4 having an X-ray generator l and a film cassette holder 2 at its opposite end.
The vertical axis of the arm 4 is rotatably mounted on a vertical axis, and the vertical axis of the arm 4 is also moved back and forth by a known drive mechanism (not shown) installed inside the head case, so that the X-ray generator 1 and the film The cassette holder 2 is moved in an elliptical motion that approximates the human dental arch.

In this manner, the X-rays from the X-ray generator 1 are projected at right angles to each tooth, and a well-focused, undistorted X-ray image is obtained on the X-ray film.

In addition, in the above-mentioned pantomography, the patient 13
A chin rest 10 as a chin rest and a bite piece lla of a bite arm 11 are attached to the tip of a table 9 installed horizontally on the support 6 of the head case as a device for fixing the face of the person. A pair of left and right presser rods 12a and 12b for pinching is attached.

The state of use is shown in FIG. 13. In the figure, the patient 13 rests his/her jaw on the chinrest (chinrest) 10, bites lightly on the bite piece lla with his upper and lower front teeth, and then presses the presser rod 12.
A and 12b are holding both sides of the head of the patient 13.

After fixing the head of the patient 13 in this manner, the X-ray generator 1 and film cassette holder 2 of the arm 4 are operated to perform pantomo X-ray photography.

<Object to be Solved by the Invention III> The pantomo X-ray imaging apparatus described above may perform temporomandibular joint diagnostic imaging in which X-ray images are taken of the displacement shape of the temporomandibular joint with the mouth closed and with the mouth open.

In this photograph, patient 13 was wearing the above chinrest)
When you open your mouth with your chin resting on 10, your upper jaw will open upwards and your face will naturally turn upwards.

This applies unreasonable force in the vertical direction to the bones of the temporomandibular joint, which tends to cause strain in the joint space.

Furthermore, when photographing the temporomandibular joint, it is diagnostically regulated that the Frankfurt line connecting the cheekbone below the orbit and the upper edge of the external auditory mouth should always be horizontal; In this situation, the Frankfurt line will not be horizontal, but will be slightly inclined, resulting in imaging that has no diagnostic value.

Therefore, in order to prevent the above-mentioned Frankfurt line from becoming level, there is a conventional device in which the above-mentioned chin rest 10 and bite arm 11 are removed so that a nose rest can be attached. This is a method in which the nasal cavity of the patient 13 is lightly inserted into the nasal support, and the mouth of the patient 13 can be freely opened and closed, and the 2-rank Aldo line can always be kept horizontal.

However, with this method, since there are individual differences in the distance between the position of the nasal cavity and the position of the temporomandibular joint, the jaw 5IIW'J may be removed from the imaging area of the X-ray generator l and film cassette holder 2, and the jaw may be placed on the film 3. This causes inconveniences such as joints not being accurately photographed, and the structure of the nose rest itself gives the patient 13 discomfort such as difficulty breathing.

The present invention solves the above-mentioned inconveniences, and also provides a pantomos ray machine image #e that can maintain the head of the subject in an appropriate state.
We are now able to provide a head restraint device for patients.

Means for Solving the Problems> In order to solve the above-mentioned problems, the head fixation device for a pantomo X-ray imaging device of the present invention is made such that the base of the head case can be moved up and down to a support that is erected in one unit. An arm with an X-ray generator and a film cassette holder at each opposing end is attached to the head case so as to be horizontally movable and rotatable, and a horizontal A bite piece arm and a chin rest are removably installed at the tip of the table, and a head fixing device is installed below the arm, which has a pair of left and right sliders that are interlocked and slid horizontally in the left and right direction. A structure in which an ear rod having an ear piece at the bottom that is inserted into the external ear canal of a human body and a head rod can be attached to the joint plate using a fixing tool in a replaceable manner. It is the property of

When taking X-rays of the temporomandibular joints of the human body, the ear rods are attached to the joint plates of the left and right sliders of the head fixation device using fixing devices, and the chin rest at the end of the table is removed, and if necessary, the ear rods are Also remove the arm.

In this way, when the lever of the head fixation device is turned forward or backward, the left and right sliders are moved in the left-right direction, which allows the patient's face to be placed with the ear rod into which the patient's ear canal ear piece is inserted. You will be holding it from the left and right,
Capable of photographing mouth opening and occlusal conditions.

Furthermore, when taking a panoramic X-ray photograph of the dental arch of a human body, a head rod is attached to the joint plate with a fixing device instead of the ear rod, and the human head is sandwiched between the head rods by operating a lever. Moreover, a chin rest and a bite arm are attached to the tip of the table, the chin is placed on the chin rest, and the bite arm is bitten lightly with the upper and lower front teeth to fix the human head and take X-rays.

<Example> Hereinafter, an example of the present invention will be described in detail based on FIGS. 1-11.

In FIG. 1, the head case 5 is fixed to a support 6, and the support 6 is attached to the main body support 8 so that the height i11 can be adjusted, and an oval hole 5b is formed in the bottom plate of the head case 5. It's dawn.

2 and 3, front and rear bearings 104a, 104b, 104c, and 104d are provided on the inner bottom of the head case 5, and the guide shaft 1 (13)
04a and 104b, and the guide shaft 104 is supported at both ends by bearings 104c and 104d.

The slider 102 has slide bearing portions 102a and 102b.
.

102c and 102d are provided, and slide bearing portions 102a are provided to the guide shafts 103 and 104, respectively.
, 102b.

102c and 102d are slidably fitted, thereby suspending the slider 102 from the guide shafts 103 and 104.

A circular hole 105 is formed in the center of the slider 102 and passes through the slider 102 in the vertical direction, and a ring 10B for a bearing receiver is fixed to the bottom surface of the slider 102 with a screw 10B.

Further, a cylindrical gear 109 having a cylindrical body and teeth 108a formed on the upper outer periphery is fitted into the hole 105 of the slider. This cylindrical gear toll is rotatably supported around a vertical axis by a bearing (for example, a cross roller bearing) 107 interposed between its lower outer periphery and the ring 10111.

In addition, since it is necessary to form a circumferential groove for receiving the bearing 107 on the lower outer periphery of the cylindrical gear 109, the lower cylindrical body 110 is integrally attached to the cylindrical gear 109 for manufacturing purposes.

The lower part of the cylindrical gear 109, more precisely the lower cylindrical body 110
The upper part of the arm 4, which has an X-ray generator 1 at one end and a film cassette holder 2 at the other end, is attached to the lower cylindrical body 11 on the lower surface of the .
0 and the pin screwed together into the cylindrical gear 109) 111 for installation.

However, the stepping motor 1 is mounted on the slider 102.
A timing bell (115) is attached to the *all 109a of the cylindrical gear 109, and a timing bell (115) is attached to the *all 109a of the cylindrical gear 109.
13 rotates the cylindrical gear 109, which causes the arm 4 to rotate horizontally.

Further, a stepping motor 116 is attached to the upper right inside of the head case 5, and a horizontal screw shaft +18 is supported by a bearing 117 so as to be freely rotatable. Therefore, boots 9-119 and 120 are fixedly fitted to the rotating shaft and screw shaft 118 of the motor 11[1, respectively, and timing bells are attached to these pulleys 119 and 120] +21
is multiplied by

As a result, the rotational force of the motor 116 is transferred to the pulley 119.1.
20 and a timing belt +21 to the screw shaft +18.

Further, the screw shaft 118 is screwed with a seat member 102e fixed to the slider 102, and when the screw shaft +18 is rotated in the forward and reverse directions by the forward and reverse drive of the motor 116,
The nut member 102e is threaded so that the slider 102 can be moved in the left-right direction in FIG.

Here, the motors 113 and 118 are connected to a control circuit (not shown), and their rotational speed, number of rotations, and drive time are controlled by various electrical signals.

Furthermore, as shown in FIGS. 2 and 3, a bridge body 83 is fixed with screws in the head case 5 by pier-shaped fixing bases 81 and 82 so as to straddle the slider 102. However,
In the center of this bridge body 83, a fishing rod I6 is mounted on a cylinder gear +09.
A fixed cap 84 is firmly fitted so as to hang down inside the central hole of the arm 4.

This fishing rod 16 is provided in a position that does not interfere with the horizontal movement and rotation of the arm 4, and a head fixing device 15 is screwed into the lower part of this fishing rod 1B with a bolt 17 together with an inner race. It is fixed.

An outer race 23 that rotates freely is provided on the outer periphery of the inner race 18.
The outer race 23 can be horizontally rotated by operating a lever 21 provided on the side wall surface of the outer race 23.

However, the crank rod 24, 22 is connected to the eccentric opposite pole position of the lower bottom surface of the outer race 23 by means of pins 19 and 20.
One end of each is connected to each other.

The other end of one crank rod 24 is connected to the lower surface of a connecting shaft 35 of a slider 28 with a pin 27, and this slider 26 has flanges 28 and 29 provided on its upper side surface connected to the right channel of the head fixing device 15. It is slidably fitted onto guide rails 30.31 provided on the body 15a.

Also, the other end of the other crank rod 22 is also connected to the pin 33.
The flange 48.4 provided on the upper side of the slider 25 is connected to the lower surface of the connecting shaft 34 of the slider 25.
7 is fitted so that it can slide onto a guide rail 48, 48 provided on the left channel body 15b of the head fixing device 15.

When the outer race 23 is rotated forward and backward by the lever 2,
The sliders 25 and 28 are slid left and right by the crank mechanism.

Further, joint plates 36.41 are vertically provided on the slider 25.26, and holes 42.41 are bored at the bottom of each joint plate 38.41. G
o has a U-shaped fixture 37.43 with male screws 52.53
38.81 are inserted into the male screws 52 and 53, and each joint plate 3 [1, 41
An ear rod 39.44, the upper part of which is inserted between the ear rod and the fixing member 37.43, is clamped with a screw.

The ear rods 39, 44 are made of acrylic resin or the like, and ear pieces 40, 45 are provided at the bottom of the ear rods 39, 44 to be inserted into the patient's ear 63.

Note that a notch 62 is formed in the upper part of the ear rod 39, 44 from the upper end edge, and this notch is fitted into the male thread from below and attached by tightening with a nut.

Further, 54.54 are left and right herad rods, which are replaced with ear rods during pantomo photography, and are used by attaching the upper notch 62 to the joint plate 38.41.

Next, the structure of the front part of the table 9 will be explained using FIG. 10.

In the figure, the front end surface of table 9 is blurred.

A holder 55 for forming a seat is fixed with a bolt 5B and a nut 57, and a chin rest 10 is removably inserted into the pocket.

Furthermore, a water holder 58 is placed on the upper surface of the front part of the table 9.
The base of the bite arm 11 having the bite piece Ila at the tip is removably inserted into the vertical hole of this holder 58.

Next, each function will be explained below.

First, when performing pantomo X-ray photography of the entire dentition, tooth roots, etc. of the patient 13 as in the past, the chinless (chinless) 10 and bite arm 11 are respectively attached to the holders 55, 58, and the head rods 54, 54 are attached. Joint plate 36.4
Attach each to 1.

In this way, place patient 13's chin on the chin rest.
Place it on O, and then bite the bite piece lla lightly with your upper and lower front teeth. Further, the operator rotates the lever 21 to slide the head rods 54, 54 left and right to sandwich the head of the patient 13 between the head lofts.

After fixing the head of the patient 13 on the table in this way, the X-ray generator 1, film cartridge 7, and holder 2 are moved in an elliptical orbit around the face of the patient 13. By rotating it, a pantomo X-ray photograph is taken.

To take an X-ray image of the temporomandibular joint of the patient 13 from the side, remove the chin rest 10 and bite arm 11, and then attach the head rod 54.54 to the ear rod 39.44.
Replace with and attach to joint plate 38.41.

and each ear piece 40 of the ear rod 39.44.
, 45 into the left and right ears B3 of the patient 13, the left and right ear rods 39 and 44 are slid using the lever 21.

Next, the X-ray generator 1 and film cassette holder 2 are moved and rotated so that only the temporomandibular joint region is photographed.

In this case, the film cassette 3 of the film cassette holder 2 is configured to slide in parallel with the speed at which the X-rays from the X-ray generator 1 scan the temporomandibular joint region of the person 13 to be photographed.

Furthermore, temporomandibular joint X-ray imaging with the jaw open is performed in the same manner as above.

Furthermore, in the above-mentioned temporomandibular joint imaging, only the bite arm II is inserted into the holder 58, and the temporomandibular joint imaging of the bite arm is performed with the patient 13 biting the bite piece lla. The upper front teeth of the person to be treated 13 may be placed lightly on the tip of the tip 11a for X-ray photography.

As mentioned above, when performing X-ray photography of the temporomandibular joint region of a patient, the earpieces of the earpieces hanging down from the upper left and right sides of the patient's head are inserted into the patient's ears. Since the clinician's head is fixed, the temporomandibular joint region can be X-rayed without distortion.

Also, when X-rays are taken of the patient's temporomandibular joints, and when pantomographic X-rays are taken of the patient's dentition.

We replaced the rod hanging from the head fixation device, and attached the chin rest and bite arm so that they can be attached and removed, allowing them to be removed freely depending on the shooting situation.
In the case of temporomandibular joint photography, conventional inconveniences such as the Frankfurt line being inclined with respect to the horizontal line in the open state and distortion of the temporomandibular joint region can be eliminated.

Furthermore, since there is no need to use a nose holder like in the past,
It is possible to prevent discomfort from being caused to the patient. Additionally, there are very few individual differences in the positional relationship between the temporomandibular joint and the outer ear.

The temporomandibular joint can be accurately projected at a desired position on the X-ray film.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an example of a pantomo X-ray imaging apparatus equipped with the device of the present invention, FIG. 2 is a plan view of the interior of the head case, and FIG. 3 is a sectional view taken along the line mm in FIG. 2. FIG. 4 is an external view showing the main parts of the device, FIG. 5 is a bottom view of the same as above, FIG. 6 is a cross-sectional view taken along the line TV-TV in FIG. 3, and FIG. 7 is a cross-sectional view taken along line V-V in FIG. Figure 8 is an assembled and exploded view of this device. Figure 9 is a cross-sectional view of Figure 4 - vr, and Figure 10 is a longitudinal cross-sectional view of the front part of the table 9. @Figure 11 is a diagram showing the state of use of this device. Fig. 12 is an external view of the conventional example, and Fig. 13 is a top view showing the usage state of the conventional example. Case 6: Support 7: Base plate 8: Urn support 9: Φ table lO: Chin rest +1@-Bite arm 11a - Bite piece +2a, +2b - Holding rod! 3--Patient! 5.φ Head fixing device 15a+15b・Channel body 16・・Fishing rod °17・−Port 180 Inner race 19・・Pin 20・−Bin 21・Strike lever 22・・Crank rod 231 Outer race 24−−Crank rod
25-Slider 2B fist slider 27..Pin 28..Flange 29..Flange 30-.Guide rail 31..Guide rail 33.Q bottle
3. Connection shaft 35...Connection shaft 36
・・Joint plate 37th fixing tool 380 Knob nut 33・・Ear rod 40 Royer bead 41・・
Joint plate 42...Hole 43 fixing tool 44--Ear rod 45+1
11 Earpiece 4B, 47...Flange 48.4
□9 e Guide rail 52...Female thread 53...Female thread 541 Head rod 55th holder 560. Bolt 57, e-nut 58th holder 590 nut 80--hole 81st knob nut 62...
Notch 63...Ear 81.82 -Fixing base 83...Bridge body 84th fixing cap 102...Slider 102a, 102
b, +02c, 102d 11 Slad bearing part 102
e* @Nut member 103, 104--Guide shaft 1
04a, 104b, 104c, 104d 11 Bearing 105 ・Hole 108 ・Ring 1
07 Bearing 108 ・Screw 108
Pistol gear 110 Lower fist barrel 111
・Bolt 113 - Stepping motor 114 - Bully - 115
-Timing belt 118 ・Stepping motor 11? -Bearing 118 ・Screw shaft 119
．． 120・Pulley 121・Timing belt 131 - Housing applicant 1 Tokyo Emi Co., Ltd. -, Kusu agent Patent attorney 1) Kiyoshi Fu Figure 1 Figure 4 Figure 6 Figure IX ← Figure 9 R Figure 11 Figure 12

Claims (1)

[Claims] The base of the head case is attached to a column set up on a stand so that it can move up and down, and the arm with the X-ray generator and film cassette holder at each opposing end is attached to the head case so that it can be horizontally moved and rotated. Further, a bite piece arm and a chin rest are removably installed at the tip of a horizontal table protruding from the lower front surface of the base of the head case, and a pair of left and right sliders that are horizontally slidable in conjunction with each other in the left and right direction are provided. A fixing device is provided under the arm, and joint plates protruding downward are provided on the left and right sliders,
Pantomo X-ray imaging characterized in that an ear rod having an ear piece at the bottom to be inserted into the external ear canal of the human body and a head rod can be attached to the joint plate using a fixing tool in a replaceable manner. Head immobilization device for equipment.