JPS6253635A - Apparatus for measuring jaw motion - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an apparatus for measuring jaw movements, and particularly to an apparatus in which upper and lower jaw movements are directly displayed.

B. Prior Art A device has been proposed that measures the movement of the mandible by attaching a light source to the mandible and using an optical sensor to detect the movement of the light source. (Japanese Unexamined Patent Publication No. 53-89296) This device can be applied to the mandibular gums.
Attach a light source that emits light toward the front, and in front of the light source,
An optical sensor is disposed through a lens, and the signal from the optical sensor is amplified and recorded on an XY recorder and a data recorder.

Furthermore, as another jaw movement measuring device, a device that detects the movement of the lower jaw using three potentiometers has been proposed. (Japanese Utility Model Publication No. 54-34290) In this device, a frame is fixed to the patient's head, and three potentiometers are used to detect forward-backward, left-right, and downward movement of the lower jaw.

C9 Problems with conventional methods However, these conventional jaw measuring devices cannot directly display jaw movements; the electrical signals must be processed and then displayed on an XY recorder or monitor scope, making the entire device difficult to use. The drawback was that it was complex and extremely expensive.

On the other hand, with conventional devices that measure the movement of the mandible by lighting, when the mandible moves together with the mandible, the movement of the head is detected as the movement of the mandible, and it is not possible to distinguish between the movement of the jaw and the movement of the head. For this reason,
If the patient moves his or her head during measurement, this may cause a chain difference, so it is necessary to keep the head fixed and move the jaw. However, if you lower your jaw all the way and open your mouth wide, you won't be able to lower your jaw to the maximum extent possible and open your mouth all at once unless you move your head slightly upward. For this reason, during the measurement, the person's head tends to move and measurement errors are likely to occur, making it difficult to perform highly accurate measurements.

Furthermore, mandibular movement measuring devices that use a potentiometer have a complicated mechanism that transmits the vertical, longitudinal, and horizontal movements of the jaw to the potentiometer, and furthermore, the longitudinal movement cannot be detected when the jaw is opened or closed. The amount of movement of each potentiometer is different, that is, each potentiometer cannot detect the movement of the jaw independently, and the movement of each potentiometer changes as a function of the movement of the other potentiometers, so the calculation process is difficult. There were some drawbacks that made it quite difficult.

The present invention has been developed with the aim of eliminating these drawbacks of the prior art.An important objective of the present invention is that the entire device can be produced at a significantly low cost, and the movement of the jaw can be directly displayed for convenience. The object of the present invention is to provide a jaw movement measuring device that can be used for.

Another important object of the present invention is that it can be attached to the upper and lower jaws to display their relative movements, so even if the head moves during measurement, it does not cause measurement errors, making it simple and easy. To provide a jaw movement measuring device capable of accurately measuring jaw movement.

Furthermore, another important object of the present invention is that since the movements of the upper and lower jaws are displayed separately as relative movements, the movement of the jaws can be measured accurately, and the entire lower jaw can be regarded as a rigid body. By this, the movement of the lower jaw can be accurately identified,
An object of the present invention is to provide a jaw movement measuring device that can measure the movement of the lower jaw by processing the measured trajectories of the upper and lower jaws with a computer.

D. Means for Solving Conventional Problems As shown in FIGS. 1 and 2, recording sheets 1a and 1b and printing members 2a and 2b are attached to the upper and lower jaws, respectively. FIG. 1 shows a portion for recording the movement of the upper jaw relative to the lower jaw, and FIG. 2 shows a portion for recording the movement of the lower jaw relative to the upper jaw.

As shown in FIG. 1, a mandibular recording sheet 1b is vertically mounted in front of and above the mandible, and the upper jaw print member 2 is placed in contact with or close to one side of this recording sheet 1b.
When a is attached to the upper jaw and the lower jaw moves, the lower jaw recording sheet 1b moves together with the lower jaw, and the movement of the upper jaw relative to the lower jaw is recorded.

In addition, in Fig. 2, a maxillary recording sheet 1a is mounted vertically at the front and lower part of the maxilla, and a mandibular printing member 2b whose tip touches or comes close to one side of the maxillary recording sheet 1a is attached. Attached to the lower jaw.

When the lower jaw moves by opening and closing the mouth, the lower jaw print member 2b moves together with the lower jaw, and the movement of the lower jaw relative to the upper jaw is recorded on the upper jaw recording sheet la.

That is, recording sheets 1a, 1b and print members 2a, 2b are attached to both the upper and lower jaws, and when the lower jaw moves, the movement locus of the jaw is recorded separately on the two recording sheets 1a, 1b.

The movement trajectories recorded on the two recording sheets separately display the relative movement trajectories of the lower jaw and the upper jaw, so when the lower jaw is considered a rigid body, the movement of the entire lower jaw can be accurately specified. If necessary, the movement of each part of the mandible can be calculated from the display trajectories of the two recording sheets.

Therefore, although the jaw movement measuring device of the present invention has two recording sheets, two printing members, and a mechanism that is attached to the jaw, it is extremely simple and can be mass-produced at low cost. The movement of the jaw can be directly displayed, making it convenient to use. Furthermore, if necessary, the movement of the entire mandible and the movement of each part of the mandible can be accurately calculated from the two displayed movement trajectories, making mandibular movement easy and precise. It is possible to realize features that can be measured accurately.

Furthermore, since the recording sheet records the relative movement between the upper and lower jaws, it does not cause measurement errors even if the patient moves his or her head up and down during the measurement. Therefore, jaw movement can be accurately measured even if the patient opens their mouth all at once and their head is slightly tilted upward, and anyone can easily and precisely measure jaw movement.

F. Preferred Embodiment The jaw movement measuring device shown in FIGS. 3 to 6 includes recording sheets la that are attached vertically to the upper and lower jaws separately;
1b, and print members 2a and 2b for recording jaw movements on these recording sheets 1a and 1b.

The recording sheets are maxillary recording sheet 1 & which is attached to the maxilla,
It consists of a mandibular recording sheet 11) that is attached to the mandible.

The print member is a maxillary print member 2 that is attached to the maxilla.
a, and a lower jaw print member 2b that is attached to the lower jaw.

The upper jaw printing member 2a is in contact with or approaching the lower jaw recording sheet) 1b, and the lower jaw printing member 2b is in contact with or approaching the upper jaw recording sheet) 1a.

Although the present invention does not specify the structure and attachment position for attaching the recording sheet and the printing member to the upper and lower jaws, the recording sheet and the printing member are attached as shown in FIGS. 3 and 4. It can be most easily attached to the upper and lower jaws via the attachment tool 3 that extends along the outer periphery of the upper and lower teeth.

The mounting tool 3 shown in FIGS. 3 and 4 has an inner surface formed in a shape that follows the outer periphery of the front teeth, and is fitted and fixed onto the outer periphery of the teeth.

Although not shown, it is also possible to fix the recording sheet and print member to the head that moves together with the upper jaw instead of directly fixing it to the upper jaw, and the member fixed to the lower jaw can also be fixed directly to the lower teeth. It is also possible to fix it to the lower jaw instead.

The recording sheet and print member are all members that can record the movement trajectory of the print member when the print member approaches or contacts the recording sheet, for example, the recording sheet is thermal paper,
In the case where the printing member is a rod with a heater at the tip that contacts the recording sheet, the recording sheet is photosensitive paper, and the printing member is a light source or laser diode that irradiates a narrow, focused light beam from the tip toward the recording sheet. In the case where the recording sheet is regular paper and the printing member is an M-type recording paper, an inkjet nozzle can be used in which the recording sheet is regular paper and the printing member is narrowly converged to eject ink.

Materials whose recording state can be electrically controlled, such as thermal paper, photosensitive paper, and inkjet paper, can be particularly conveniently used in the present apparatus. This is because a 4-way person wears this device and practices jaw movements several times (the trajectory of the movement is not recorded at this time), and after they are able to move their jaws successfully, they can move their jaws for 1 cycle. This is inevitable because it allows you to control the recording state.

In a combination of a recording sheet and a print member whose recording state can be controlled, for example, 0.0
By adding shading to the recording line at intervals of 2 to 0.5 seconds,
Time synchronization marks can be added to the jaw movement trajectory recorded on the upper and lower recording sheets.

That is, as shown in FIGS. 8 and 9, it is possible to accurately detect which positions the upper and lower print members pass at the same time in the recorded jaw movement locus.

For example, by assigning the number 1 to the starting point and then sequentially assigning numbers 2, 3, 4 + ... to the points that are plotted darkly, the relative position of the maxillary jaw movement at a specific time can be identified. can.

In this way, the ability to specify the upper and lower jaw movement trajectories is convenient when inputting the upper and lower jaw trajectories into a computer and calculating the movement of the lower jaw.

The shading of the recording locus on the recording sheet can be determined by, in the case of a combination of thermal paper and a heater, increasing the current supplied to the heater in a pulsed manner at regular intervals, corresponding to the waveform shown in Figure 7, or in the case of light. , the luminous intensity is temporarily increased in accordance with the waveform in Figure 7,
In the case of inkjet, it is sufficient to temporarily increase the amount of ink jet 6tfil.

The recording sheet la, 1k) can be made entirely in the form of a hard sheet and made completely replaceable, but it is also possible to fix the substrate to the upper and lower jaw connectors and attach or detach it to the surface of this substrate. It is convenient to use with recording paper attached.

The recording paper can be easily attached to the substrate using an adhesive tape such as double-sided adhesive tape, a magnet, or the like.

When recording the movement locus of the jaw by bonding a print member to the surface of the recording sheet, as shown in FIG. , 2b are preferably pushed out elastically and lightly using an elastic body 5 such as a rubber-like elastic body or a tension spring, so that the leading ends of the recording sheets 1a and 1b are brought into contact with the surfaces of the recording sheets 1a and 1b.

A heater and a light bulb are fixed to the tip of the print member.

When the printing member is a light bulb or an inkjet nozzle, there is no need to bring the tip of the printing member into contact with the recording sheet. Therefore, these printing members do not need to be attached so that they can move in and out of the recording sheet, but can be fixed to the frame.

The printing member is supplied with power through lead wires or with ink through a pump.

The method of using the jaw movement measuring device configured in this way is to attach the upper and lower recording sheets 1a, Ib and the print members 2a, 2b to the jaw via the mounting device 3,
Assuming that b can be recorded on recording sheets) 1a and -1b,
Open the mouth wide and close it, and record the relative movement of the upper and lower jaws on the vertical recording sheets 1a and 1b.

[Brief explanation of the drawing]

1 and 2 are schematic side views showing an embodiment of the present invention, FIGS. 3 and 4 are schematic perspective views of a jaw movement measuring device showing an embodiment of the present invention, and FIGS. 5 and 4 are schematic side views showing an embodiment of the present invention. Fig. 6 is a front view and right side view of a jaw movement measuring device showing an embodiment of the present invention, Fig. 7 is a graph showing signal waveforms for shading printed members, and Figs. 8 and 9 are upper jaw prints. It is a graph showing the jaw movement locus displayed on the member and the lower jaw print member. 1a...Maxillary record sheet, 1b...Mandibular record sheet, 2
a... Upper jaw print member, 2b... Lower jaw print member,
3. Mounting device, 4. Cylinder, 5. Elastic body, Figure 1 Figure 3 Time Figure 8
9 Drawing procedure amendment (voluntary) July 26, 1985 1, Indication of the case 1985 Patent application “195275 λ Title of the invention Jaw movement measuring device 3, Person making the amendment Patent applicant related to the case Name: Nagai Bando - 4. Column for detailed explanation of agent. 8 Contents of the amendment As shown in the attached sheet (no changes to the content except for the matters stated in the column of subject of amendment) Description 1, Title of the invention Jaw movement measuring device 2, Claims Jaw movement measuring device. (3) The jaw movement measuring device according to claim 1, wherein the printing member is a recording pen. -←The jaw movement measuring device according to claim 1, wherein the Lee print member is an inkjet nozzle that jets ink onto the recording sheet. 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a device for measuring jaw movements, and particularly to a device that directly displays upper and lower jaw movements. [Prior Art] A device has been proposed that measures the movement of the mandible by attaching a light source to the mandible and detecting the movement of the light source with an optical sensor (Japanese Patent Laid-Open No. 53-89296). This device is applied to the mandibular gums.
Attach a light source that emits light toward the front, and in front of the light source,
An optical sensor is disposed through a lens, and the signal from the optical sensor is amplified and recorded on an XY recorder and a data recorder. Furthermore, as another jaw movement measuring device, a device that detects the movement of the lower jaw using three potentiometers has been proposed (Japanese Utility Model Publication No. 54-34290). This device has a frame fixed to the patient's head, and uses three potentiometers to detect the forward-backward, left-right, and up-and-down movements of the lower jaw. [Conventional Problems] However, these conventional jaw measurement devices cannot directly display the movement of the jaw; the electrical signals must be processed and then displayed on an XY recorder or monitor scope, and the entire device However, it has the disadvantage that it is complicated and extremely expensive. Furthermore, with conventional devices that measure the movement of the lower jaw using light, when the jaw moves together with the lower jaw, head movement is detected as lower jaw movement, and it is not possible to distinguish between jaw movement and head movement. For this reason, if the patient moves his or her head during measurement, it may cause errors, so it is necessary to keep the head fixed and move the jaw. However, if you lower your jaw all the way and open your mouth wide, you won't be able to lower your jaw to the maximum extent possible and open your mouth all at once unless you move your head slightly upward. For this reason, the patient's head moves during measurement, which tends to cause measurement errors, making it difficult to perform highly accurate measurements. Furthermore, mandibular movement measuring devices that use a potentiometer have a complicated mechanism that transmits the vertical, longitudinal, and horizontal movements of the jaw to the potentiometer, and moreover, the mechanism for transmitting the vertical, longitudinal, and horizontal movements of the jaw to the potentiometer is complicated. The amount of movement of the potentiometers is different, that is, each potentiometer cannot detect the movement of the jaw independently, and the movement of each potentiometer changes as a function of the movement of the other potentiometers.
There was also the drawback that calculation processing became considerably difficult. The present invention has been developed with the aim of eliminating these drawbacks of the prior art.An important object of the present invention is that the entire device can be manufactured at a significantly low cost, and jaw movements can be directly displayed for continuous confirmation. The object of the present invention is to provide a jaw movement measuring device that can be used for. Another important object of the present invention is that the movement of the lower jaw relative to the upper jaw is displayed, so that even if the head moves during measurement, it will not cause measurement errors and the movement of the jaw can be easily and accurately measured. The object of the present invention is to provide a measuring device that can measure jaw movement. [Means for solving conventional problems] A jaw movement measuring device includes a recording sheet, a printing member that records a movement trajectory by contacting or approaching the recording sheet, and one of the recording sheet and the printing member that is attached to the upper jaw. and a mounting tool that is mounted on one of the lower jaw and the other of the print member and the recording sheet at a position where it approaches or contacts the recording sheet and the print member mounted on either the upper jaw or the lower jaw. The recording sheet and the print member are moved relative to each other with the upper jaw and the lower jaw using the mounting tool, and the jaw movement locus record is measured on the recording sheet. [Operation and Effect] The jaw movement measuring device according to the preferred embodiment of the present invention shown in FIGS.
a, lb, and print members 2a, 2b are attached. FIG. 1 shows a portion for recording the movement of the upper jaw relative to the lower jaw, and FIG. 2 shows a portion for recording the movement of the lower jaw relative to the upper jaw. As shown in FIG. 1, a mandibular recording sheet) 1b is mounted vertically, located in front of and above the mandible, and in contact with or close to one side of this recording sheet 1b, the maxillary print member 2
When a is attached to the upper jaw and the lower jaw moves, the lower jaw recording sheet 1b moves together with the lower jaw, and the movement of the upper jaw relative to the lower jaw is recorded. In addition, in Fig. 2, a maxillary recording sheath) 1a is installed vertically at the front and lower part of the maxilla.
A mandible print member 2b, whose tips are in contact with or come close to each other, is attached to the mandible on one side of 1a. When the lower jaw moves by opening and closing the mouth, the lower jaw print member 2b moves together with the lower jaw, and the movement of the lower jaw relative to the upper jaw is recorded in the upper jaw recording sheet 1a. That is, recording sheets 1a, 1b and print members 2a, 2b are attached to both the upper and lower jaws, and when the lower jaw moves, the movement locus of the jaw is recorded separately on the two recording sheets 1a, 1b. In this way, when the relative movement trajectories of the lower jaw and the upper jaw are displayed separately on two recording sheets, when the lower jaw is considered to be a rigid body, the movement of the entire lower jaw can be accurately specified. If necessary,
The movement of each part of the mandible can be calculated from the display trajectories of the two recording sheets. The jaw movement measuring device of the present invention consists of a recording sheet, a printed member, and a fitting for attaching these to the jaw, and has a simple structure and can be mass-produced at low cost. It is convenient to use because it can be directly displayed, and if necessary, the movement of the entire lower jaw can be calculated from the two displayed movement trajectories.
In addition, the movement of each part of the mandible can be calculated accurately, and mandibular movement can be easily and precisely measured. Furthermore, since the recording sheet records the relative movement of the jaw, even if the patient moves his or her head up and down during the measurement, it will not cause measurement errors. Therefore, jaw movement can be accurately measured even if the patient opens their mouth all at once and their head is slightly tilted upward, and anyone can easily and precisely measure jaw movement. [Preferred Embodiment] Hereinafter, one embodiment of the present invention will be described based on the drawings. The jaw movement measuring device shown in FIGS. 3 to 6 includes a recording sheet 1a that is attached vertically to the upper and lower jaws separately;
1b, and blade members 2a, 2b for recording the movement of the jaw on these recording sheets 1a, 1b). The recording sheets include a maxillary recording sheet 1a that is attached to the maxilla;
It consists of a mandibular recording sheet) 1b attached to the mandible. The print member is a maxillary print member 2 that is attached to the maxilla.
a, and a lower jaw print member 2b that is attached to the lower jaw. The upper jaw printing member 2a is in contact with or approaching the lower jaw recording sheet) 1b, and the lower jaw printing member 2b is in contact with or approaching the upper jaw recording sheet) 1a. Although the present invention does not specify the structure and mounting position of the recording sheet and the print member on the upper and lower jaws, the recording sheet and the print member are as shown in FIGS. 3 and 4. It can be most easily attached to the upper and lower jaws via the attachment tool 3 that extends along the outer periphery of the upper and lower teeth. The mounting tool 3 shown in FIGS. 3 and 4 has an inner surface formed in a shape that follows the outer periphery of the ζ front tooth, and is fitted and fixed onto the outer periphery of the tooth. Although not shown, it is also possible to fix the recording sheet and print member to the head that moves together with the upper jaw instead of directly fixing it to the upper jaw, and the member fixed to the lower jaw can also be fixed directly to the lower teeth. It is also possible to fix it to the lower jaw instead. The recording sheet and the printing member are all members that can record the movement trajectory of the printing member by approaching or contacting the recording sheet, for example, the recording sheet is thermal paper,
In the case where the printing member is a rod with a heater at the tip that contacts the recording sheet, the recording sheet is photosensitive paper, and the printing member is a light source or laser diode that irradiates a narrow, focused light beam from the tip toward the recording sheet. When the recording sheet is regular paper and the printing member is a recording pen, a case where the recording sheet is regular paper and the printing member is a thin jet nozzle that ejects ink can be used. Materials whose recording state can be electrically controlled, such as thermal paper, photosensitive paper, and inkjet paper, can be particularly conveniently used in the present apparatus. This is done after the patient wears this device and practices jaw movements several times (the movement trajectory is not recorded at this time), and after the patient is able to move the jaw successfully, the jaw movements are recorded for one cycle. It is inevitable because it can be controlled to the state. In the combination of a recording sheet and a print member whose recording state can be controlled, as shown in FIG.
By adding shading to the recording line at intervals of 2 to 0.5 seconds,
Time synchronization marks can be added to the jaw movement trajectory recorded on the upper and lower recording sheets. That is, as shown in FIGS. 8 and 9, it is possible to accurately detect which positions the upper and lower print members pass at the same time in the recorded jaw movement locus. For example, the starting point is numbered 1, and then the darker plotted points are numbered 2, 3, 4, etc. By assigning numbers such as ..., the relative position of the upper and lower jaw movements at a specific time can be specified. In this way, the ability to specify the upper and lower jaw movement trajectories is convenient when calculating the movement of the lower jaw by inputting the upper and lower jaw trajectories into a computer manually. The shading of the recording locus on the recording sheet can be determined by, in the case of a combination of thermal paper and a heater, increasing the energizing current of the heater in a pulsed manner at regular intervals, corresponding to the waveform shown in Figure 7, or in the case of light. , the luminous intensity may be temporarily increased in accordance with the waveform shown in FIG. 7, and in the case of an inkjet, the amount of ink ejected may be temporarily increased. The recording sheets 1a and 1b have a hard sheet shape as a whole,
Although it is possible to make the entire device replaceable, it is more convenient to fix the substrate to the upper and lower jaw connectors and detachably attach the recording paper to the surface of the substrate. The recording paper can be easily attached to the substrate using an adhesive tape such as double-sided adhesive tape, a magnet, or the like. When recording the movement trajectory of the jaw by bonding a print member to the surface of the recording sheet, as shown in FIG. . It is preferable to push out the recording sheet 2b elastically and lightly using an elastic body 5 such as a rubber-like elastic body or a tension spring so that the leading end contacts the back surfaces of the recording sheets 1a and 1b. A heater and a light bulb are fixed to the tip of the print member. When the printing member is a light bulb or an inkjet nozzle, there is no need to bring the tip of the printing member into contact with the recording sheet. Therefore, these printing members do not need to be mounted so that they can move in and out of the recording sheet, but can be fixed to the frame. The printing member is supplied with power through lead wires or with ink through a pump. The method of using the jaw movement measuring device configured in this way is to attach the upper and lower recording sheets 1a, 1b and the print members 2a, 2b to the jaw via the attachment 3, and then attach the print members 2a, 2b to the jaw.
b can be recorded on the recording sheets 1a and 1b, open the mouth wide and close it, and record the relative movement of the upper and lower jaws on the upper and lower recording sheets 1a and 1b. 4. Brief description of the drawings FIGS. 1 and 2 are schematic side views showing an embodiment of the present invention, and FIGS. 3 and 4 are schematic perspective views of a jaw movement measuring device showing an embodiment of the present invention. 5 and 6 are a front view and a right side view of a jaw movement measuring device showing an embodiment of the present invention, FIG. 7 is a graph showing a signal waveform for shading a print member, and FIG. and FIG. 9 is a graph showing the jaw movement trajectory displayed on the upper jaw print member and the lower jaw print member. 1a: Upper jaw recording sheet, 1b: Lower jaw recording sheet, 2a: Upper jaw print member, 2b: Lower jaw print member, 3: Mounting tool, 4: Cylinder, 5: Elastic body.

Claims (5)

[Claims] (1) The recording sheet consists of a recording sheet that is attached vertically to the upper jaw and the lower jaw, and a printing member that records the movement of the jaw on these recording sheets. On the other hand, the print member also consists of an upper jaw print member that is attached to the upper jaw and a lower jaw print member that is attached to the lower jaw. A jaw movement measuring device, wherein the printing member is configured to print jaw movements on a maxillary recording sheet. (2) The jaw movement measuring device according to claim (1), wherein the recording sheet is thermal paper and the printing member has a heater in a portion that contacts the recording sheet. (3) The jaw movement measuring device according to claim (1), wherein the recording sheet is a photosensitive sheet, and the printing member has a light source at its tip that irradiates focused light toward the recording sheet. (4) The jaw movement measuring device according to claim (1), wherein the printing member is a recording pen. (5) The jaw movement measuring device according to claim (1), wherein the printing member is an inkjet nozzle that jets ink onto the recording sheet.