JPH10127670A - Display method of middle ear movement characteristic according to mandibular motion and measuring instrument therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for quantitatively expressing and displaying the physiological mandibular position with the fluctuation in the function of the middle ear cavity as an index and a measuring instrument for quantitatively judging and setting three-dimensional mandibular positions (occlusal positions). SOLUTION: This instrument includes a probe which is mounted at the testee' s auditory meatus and detects the dynamic compliance of the ear cavity and a distance measuring means which measures the moving distance of the lower jaw with respect to the testee's upper jaw. The compliance in the ear cavity detected by this probe and the distances from the occlusal positions of the upper and lower jaws detected by this distance measuring means are respectively set at two-dimensional aces. The changes in the compliance accompanying the changes in the distances from the occlusal positions are built as a two-dimensional graphs with the compliance and the distances as parameters and are displayed in real time on a display. The rest position point CO of the malocclusion person may be specified from these graphs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying middle ear dynamic characteristics associated with mandibular movement for quantitatively expressing a physiological mandibular position using a change in the function of the middle ear cavity as an index, and a measuring device therefor. In more detail, the jaw movement associated with jaw movements for quantitatively determining and setting three-dimensional mandibular position (occlusal position) such as jaw dysfunction, low occlusion, edentulous jaw etc. The present invention relates to a method for displaying ear dynamic characteristics and a measuring device therefor.

[0002]

2. Description of the Related Art Conventionally, mandibular position (occlusal position) has been determined by a method based on mandibular rest, a method based on pronunciation, a method based on swallowing, a method based on occlusal force, a method based on mandibular movement, a method based on electromyogram, There are many indices, such as radiographic methods.

[0003] The lower jaw resting method is a method in which the subject directly asks a question of the state in which the mouth is naturally closed from the subject, and the method based on pronunciation means that the subject bites the upper and lower teeth. It is a method to judge by listening to the ticking sound, and the method by swallowing is a method of attaching a sensor to the lower jaw of the subject, drinking water and listening to the sound at that time, and determining by biting force Is a method of judging by the occlusal force when the subject bites a thin film-shaped sensor, and the method by mandibular movement is a method of causing the subject to move the mandible and interrogating, The electromyogram method is a method in which an electromyogram sensor is attached to the lower jaw of a subject to make a judgment based on an electromyogram at the time of occlusion. It is a method of observing the target state.

[0004]

SUMMARY OF THE INVENTION
All of them were original qualitative judgments based on the experience of examiners such as doctors, were poor in objectivity, could not exclude individual differences of patients and subjectivity of examiners, and could not make quantitative judgments .

The present invention relates to a method for quantitatively expressing and displaying a physiological lower jaw position using a change in the function of the middle ear cavity as an index, a jaw function abnormality such as temporomandibular disorder, low occlusion, edentulous jaw and the like. It is an object of the present invention to provide a measuring device for quantitatively determining and setting the three-dimensional lower jaw position (occlusal position).

[0006]

SUMMARY OF THE INVENTION According to the present invention, the compliance between the ear cavity and the distance from the occlusal position of the upper and lower jaws are each set to two.
Display of the middle ear movement characteristic associated with mandibular movement, wherein a change in compliance with a change in distance from the occlusal position is displayed two-dimensionally, with the compliance and the distance set as parameters in a dimensional axis. Is the way. A probe 13 attached to the external auditory canal 11 of the subject 10 for detecting dynamic compliance of the ear cavity; a face bow 43, 44 attached to the probe 13 and attached to the face of the subject 10; 10, a cine 55 attached to the lower jaw, the cine 55 and the face bow 43,
44 and a distance measuring means 33 for measuring the distance to
The probe 13 has a sound guide hole 15, 1
6. An air hole 17 is provided toward the ear canal 11, a pressure sensor 18 for converting a detected pressure into an electric signal is connected to the air hole 17, and a microphone 23 and this microphone are connected to the sound conducting hole 15. Compliance circuit 2 for converting the analog signal value of 23 into a compliance signal value
6, an earphone 27 for outputting a signal sound and an oscillator 30 for oscillating a probe tone are connected to the sound conducting hole 16 in the apparatus for measuring middle ear dynamic characteristics accompanying mandibular movement. is there.

Measurement of distance The vibrator of the distance measuring means 33 oscillates and emits ultrasonic waves.
The light is reflected by the reflection plate 34. This is received by the same vibrator as a time signal and output as the distance L between the upper and lower jaws. When the lower jaw is opened little by little, the reflecting plate 34 descends, and the change in the changing distance is detected momentarily and sent to the control circuit 32.

Measurement of Dynamic Conplanance A 226 Hz sinusoidal signal is converted into a sound with a constant sound pressure by earphones 27, passed through the sound guide hole 16 and into the ear canal 11. The impedance value of the middle ear sound transmission system fluctuates with the opening movement of the subject 10. This acoustic impedance is detected by the microphone 23, and the compliance circuit 26 measures a dynamic compliance (acoustic volume value). The opening distance of the lower jaw position (the distance that varies in synchronization with the dynamic conplanance) is measured by the measurement circuit 39 and sent to the control circuit 32. Therefore, in the control circuit 32, the dynamic compliance is set to the Y axis, and the distance variation value is set to the X axis.
A graph as an axis is constructed, displayed on the display 40 in real time, and printed by the printer 41. This graph is
Measured simultaneously in both ears.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION

(1) Measurement Principle of the Present Invention When the subject opens and closes his mouth, the middle ear sound transmission impedance value in the sealed outer ear fluctuates with this opening movement. A dynamic compliance is measured from the acoustic impedance of this acoustic method application. At the same time, the opening distance of the lower jaw (the distance that fluctuates in synchronization with the dynamic conplanance) is measured, and a graph is constructed in which the dynamic conplanance is the Y axis and the distance variation value is the X axis. Then, by comparing the characteristics of the edentulous person with the characteristics of the healthy dentulous person from this graph and adjusting the occlusal state and denture position of the patient,
It is possible to quantitatively determine and set the three-dimensional lower jaw position (occlusal position) such as jaw dysfunction, jaw dysfunction, low occlusion, and edentulous jaw. The present invention numerically measures a physiologically resting lower jaw position by dynamic conplanance, and treats jaw dysfunction, low occlusion, edentulous jaw, etc., which are considered to be temporomandibular joint disorders based on the measured data. It is an object of the present invention to provide a device capable of obtaining an index to be used.

(2) An embodiment of a method of displaying the middle ear dynamic characteristic associated with mandibular movement and an apparatus for measuring the same according to the present invention will be described with reference to FIGS. 4, 5 and 6. Reference numeral 10 denotes a subject to which the device for measuring middle ear dynamic characteristics associated with mandibular movement according to the present invention is mounted. Right Face Bow 4 of this device
3 and the left face bow 44 have a U-shape facing each other. Probes 13 and 13 are attached to one end, and slots 45 and 45 are formed in the other end. The position is adjusted and fixed together with the support 50,
A support arm 47 is connected to the intermediate portion by screws 48 and 49. Then, the adjustment screws 46, the screws 48, 49 are loosened, and both the probes 13 are firmly inserted into both ears. Thereafter, the adjustment screws 46, the screws 48, 49 are firmly tightened. In addition, the nosepiece 52 is applied to the concave portion between the forehead slightly above the nose of the subject 10 and the right face bow 43,
The left face bow 44 is fixed with the adjusting screw 54 so as to be substantially horizontal. Thus, the left and right probes 1
In a state of being fixed firmly at three points of 3, 13 and the nosepiece 52, the distance measuring means 33 provided at the tip of the support piece 50 emits ultrasonic waves substantially vertically.

The cine 55 is fixed to the lower jaw of the subject 10, but is attached to the basal floor in the case of an edentulous person and to the front teeth in the case of a edentulous person. A support rod 56 is attached to the cine 55 substantially horizontally, and a semicircular ring 58 and a cylinder 59 at the tip of the support rod 56 are rotatably attached with pins 57. Is provided with a reflecting plate 34 so as to face the distance measuring means 33,
In addition, a weight 60 for keeping the reflecting plate 34 horizontal at all times is attached to the lower portion, thereby forming a gyro mechanism.

A spacing device 67 is provided between the support arm 47 and the support rod 56. The spacing device 67 includes an arm 61 provided on the support arm 47 side.
A link 63 is interposed between the arm 61 and the arm 64 provided on the support rod 56 side, and is connected by a fixing screw 65 and a fixing screw 66. The arm 61 is provided with a long hole 62, and the fixing screw 65 Are slidably fitted.

The probe 13 and the distance measuring means 33
Are drawn out of the right face bow 43 and the left face bow 44 and connected to a compliance measuring circuit 69. The probe 13 and the distance measuring means 33 are connected to the input side of the compliance measuring circuit 69.
Is connected. The ear plug 14 of the probe 13 is provided with sound conducting holes 15 and 16 and an air hole 17 and inserted into the external auditory canal 11 so that the inside of the external auditory canal 11 is sealed.

A diaphragm type pressure sensor 1 for converting the pressure detected by the sensor into an electric signal is provided in the air hole 17.
8, a first amplifier 19 for differential measurement, and a second amplifier 20 having a drift adjustment variable resistor 21 for drift adjustment and outputting according to A / D are sequentially connected. A small and highly sensitive condenser microphone 23, a third amplifier 24 as a preamplifier,
A filter 25 that passes only the signal (226 Hz) band,
A compliance circuit 26 that converts an analog signal value into a compliance signal value (volume value) is sequentially connected. A small earphone 27 for outputting a signal (226 Hz) sound, a fourth amplifier 28 for driving the earphone, a preamplifier 29 for performing signal processing to the fourth amplifier 28 and a compliance circuit 26 are provided in the sound guide hole 16. Oscillator 30 that oscillates a 226 Hz sine wave as a probe tone
Are sequentially connected.

The distance measuring means 33 is composed of an ultrasonic vibrator which also serves as an oscillator and a receiver. A driving circuit 35 for driving the distance measuring means 33 is provided on the input side of the distance measuring means 33.
An oscillator 36 oscillating at 400 KHz is connected. On the output side, a fifth amplifier 37 with a built-in AGC for dealing with the magnitude of the reflected signal due to distance, a comparator 38 comprising a digital waveform processing circuit, and a distance measuring means 33 detect A measuring circuit 39 for converting the obtained data as a distance between the upper and lower jaws is sequentially connected.

The second amplifier 20 and the compliance circuit 26 are connected to an A / D conversion circuit 22. Among them, the compliance circuit 26 includes each subject 10
D / to return the initial value for each and unify the start point
The A conversion circuit 31 is connected. Further, the A / D conversion circuit 22 and the measurement circuit 39 are connected to a control circuit 32 that processes control data of the device and outputs the processed data to a display 40 and a printer 41. The display unit 40 is made of liquid crystal and displays a graph in real time. The printer 41 prints out data.

A description will now be given of a method of displaying the middle ear dynamic characteristic associated with mandibular movement according to the present invention configured as described above, a measurement by the measuring device thereof, and a graph constructed from the measured data. Attachment of the device Loosen the adjusting screws 46, screws 48 and 49, open the right face bow 43 and the left face bow 44, move to the both ears of the subject 10, and make the right face bow 43 and the left face bow 4
4 is closed, and the ear plug 14 of the probe 13 is
Is inserted, and the adjustment screw 46 and the screws 48 and 49 are tightened and fixed. In addition, loosen the adjusting screw 54, and
Is brought into close contact with the concave portion between the nose and the forehead, and the adjusting rod 53 is moved forward and backward so that the right face bow 43 and the left face bow 44 are substantially horizontal.

Next, the fixing screw 6 of the spacing device 67
5 and 66 are loosened, and the cine 55 is fixed to the lower jaw of the subject 10. When the subject 10 is an edentulous person, it is fixed to the base floor, and when it is a edentulous person, it is fixed to the front teeth. During the measurement, the lower jaw is allowed to freely move up and down, back and forth, and left and right without fixing both the fixing screws 65 and 66.

Measurement of Distance The subject 10 keeps his mouth closed as shown by the solid line in FIG. The 400 KHz signal output from the oscillator 36 is applied to the drive circuit 3
5, the vibrator of the distance measuring means 33 oscillates, emits ultrasonic waves, and is reflected by the reflector 34. This is received as a time signal by the same vibrator, amplified by a fifth amplifier 37, and a comparator 38 compares the time difference.
At 9, the distance is output as L. When the lower jaw is opened little by little, the integral cine 55 is also opened and the reflector 34 descends as shown by the chain line. At this time, since the reflection plate 34 is rotatably supported by the pins 57, the gyro mechanism is used.
It is always horizontal. Such a change in distance is detected every moment and sent to the control circuit 32.

Measurement of Dynamic Conplanance A 226 Hz sinusoidal signal is sent from the oscillator 30 to the earphone 27 through the preamplifier 29 and the fourth amplifier 28, and is converted into a sound with a constant sound pressure by the earphone 27. It is guided into the ear canal 11 through the hole 16. When the subject 10 opens and closes the mouth in this state, the impedance value of the middle ear sound transmission system fluctuates with this opening movement.
The acoustic impedance of this acoustic method application is microphone 2
3, the S / N ratio is improved by the third amplifier 24,
The signal is amplified and the filter 25 passes only the 226 Hz band. In the compliance circuit 26, a dynamic compliance (acoustic volume value) is measured based on the signal from the preamplifier 29 and the signal from the filter 25. This dynamic compliance is sent to the control circuit 32 via the A / D conversion circuit 22.

The opening distance of the lower jaw position (the distance that fluctuates in synchronization with the dynamic conplanance) is detected by the distance measuring means 33 as described above, and is measured by the measuring circuit 39.
2 has been sent. Therefore, the control circuit 32 constructs a graph in which the dynamic compliance is set to the Y axis and the distance variation value is set to the X axis, and is displayed on the display 40 in real time.
Further, printing is performed by the printer 41. This graph is measured simultaneously for both ears.

FIG. 1 (a) and FIG. 1 (b) show specific measured values of a change in dynamic conplanance with a change in distance from the occlusal position.
Next, specific measured values of the change in the pressure in the ear cavity with the change in the distance from the occlusal position will be described with reference to FIG. FIG. 1 (a)
(B) sets the compliance in the ear cavity and the distance from the occlusal position of the upper and lower jaws respectively on a two-dimensional axis, and sets the compliance and the distance as parameters, and evaluates the change in compliance with the change in the distance from the occlusal position. This is a display method in which two-dimensional display is performed. That is, it is a graph in which the dynamic compliance is set on the Y axis and the distance variation value is set on the X axis. In this graph, the characteristic shown in FIG.
0 indicates a pattern in the case of a healthy dentulous person,
The characteristic shown in (b) shows a pattern in a case where the subject 10 has a loss of occlusal support (edentulous jaw). At the time of measurement, the subject 10 inserts the probe 13 into his ear, sets the distance when the mouth is closed to 0, and gradually opens the mouth (the lower jaw opens downward with the jaw joint as a fulcrum). It shows how the strategic complanance has changed.

FIG. 2 shows that the pressure in the ear cavity and the distance from the occlusal position of the upper and lower jaws are respectively set on the two-dimensional axis, and the pressure and the distance are used as parameters, and the distance from the occlusal position is changed. This is a display method in which a change in pressure is displayed two-dimensionally.

Prior to the detailed description of the patterns shown in FIGS. 1A and 1B and FIG. 2, FIG. 3 will be described. FIG.
Is a so-called Bessel banana characteristic diagram. The curve between CR and PP in the right side characteristic is the locus of the temporomandibular joint when the lower jaw is moved up and down, and the curve between CR and NW is that the lower jaw is twisted to the right. The curve between CR and W is the locus of the left temporomandibular joint when the lower jaw is twisted to the left. Also, CO (cusp fitting position) -RP in the left side characteristic
The curve between (rear limit position) is the locus of the lower jaw with CR as the fulcrum, and the curve between RP-MaxOP (maximum open position) is the locus of the lower jaw while the temporomandibular joint is disengaged from CR to PP, The curve between MaxOP-PP (front limit) is P
P is the locus of the lower jaw with the temporomandibular joint disengaged.
The curve between CO is the locus of the lower jaw when returning to the normal position.

As described above, the point CR indicates the position where the temporomandibular joint is in a physiologically stable state, and the point CO in the locus of the lower jaw.
Is a resting point where the lower jaw is closed in a physiologically stable state, and the locus of the lower jaw between CO-RP forms an arc centered on the joint position CR, and the mouth is opened and closed in a normal state. Is shown. The locus of the lower jaw between the inflection point RP and MaxOP indicates that when the mouth is greatly opened and closed, the joint position changes from CR to P
The process of gradually deviating to the point P is shown. In addition, the dotted lines CO1 and PP1 indicate characteristics of edentulous persons and low-occlusion persons, and the resting point CO of occlusal abnormal persons such as edentulous persons cannot be specified only from the characteristics of FIG. Is shown.

However, according to the display method for specifying the lower jaw position of the present invention, it has been found that the resting position CO of the occlusal abnormal person can be specified from the characteristic diagrams shown in FIGS. 1 (a) and 1 (b).

First, the relationship between FIG. 3 and the graphs of FIGS. 1A and 1B will be described. In the pattern of a healthy dentulous person shown in FIG. 1A, the occlusal height (distance on the X axis) of the lower jaw is approximately 0 at the resting point CO where the lower jaw is closed in a physiologically stable state (in the figure) D0), the dynamic conplanance (Y-axis) corresponding to the resting point CO is taken as the extreme point D0, and the mouth is opened in a normal state. Gradually rises to the extreme point D1,
It falls again at this point D1. The extreme point D1 at this time corresponds to the inflection point RP in FIG. This D1
Is the extreme point at the boundary point between the terminal hinge movement and the forward movement of the condylar, and when the mouth is further opened, the dynamic conplanance (Y axis) from this extreme point D1 to the extreme point D2 once Decrease. This extreme point D2 is MaxOP (maximum opening position)
If you try to open it further, the temporomandibular joint comes off and rises sharply again.

The characteristic line shown in FIG. 1 (b) shows the pattern of a person who has lost occlusal support (edentulous jaw). In this pattern, the extreme point of the dynamic conplanance (Y axis) corresponding to the resting point CO is D01, so that the resting point that could not be found in FIG. 3 can be clearly found in FIG. That is, when the edentulous person closes his mouth, it rises from D01 to the extreme point Dx1 once, the mouth is completely closed and the upper and lower jaw base floors are in contact with each other. Descend. When this distance L is 0, it corresponds to CO1 in FIG. From this pattern, D01-D in edentulous persons
A space between x1 indicates a resting space, and a point near D01 between D01 and Dx1 indicates a rest point. Therefore, if the distance L to D01 on the X axis at this time is measured and the fixing screws 65 and 66 are fixed in a state corresponding to the distance L, the distance data adjusts the occlusal state of the patient and the position of the denture. This indicates that the position is optimal.

Measurement of Pressure The subject 1 was examined while the ear canal 11 was sealed with the probe 13.
When the mouth opens or closes, the pressure in the ear canal 11 changes accompanying this opening movement. This change in pressure is detected as an electric signal by the pressure sensor 18, the S / N ratio is improved and amplified by the first amplifier 19, the drift is adjusted by the second amplifier 20, and the A / D conversion is performed. Circuit 22
Through the control circuit 32. The opening distance of the lower jaw position is detected by the distance measuring means 33 as described above, and the measurement circuit 39
And is sent to the control circuit 32. Therefore, the control circuit 32 constructs a graph in which the pressure is set to the Y axis and the distance variation value is set to the X axis, displayed on the display 40 in real time, and printed by the printer 41. This graph is measured simultaneously for both ears.

FIG. 2 shows that the pressure in the ear cavity and the distance from the occlusal position of the upper and lower jaws at this time are respectively set on a two-dimensional axis, and the pressure and the distance are used as parameters to change the distance from the occlusal position. FIG. 9 is a characteristic diagram in which the accompanying pressure change is displayed two-dimensionally. For example, it is assumed that the solid line characteristic is for a person who has no deviation due to the opening movement, and the dotted line characteristic is for a person who has deviation due to the opening movement. Then, the solid line characteristic is almost horizontal to the change in distance. On the other hand, the dotted line characteristic is waving with respect to the change in the distance, indicating that the left and right ears are unbalanced. Therefore, dentures and the like are adjusted so that this characteristic is balanced.

[0031]

The present invention is constructed as described above.
Physiological mandibular position can be quantitatively expressed using the change in the function of the middle ear cavity as an index, and three-dimensional mandibular position such as jaw dysfunction, low occlusion, edentulous jaw etc. The determination and setting of the occlusal position can be performed quantitatively.

[Brief description of the drawings]

FIG. 1 is a graph in which a dynamic confluence measured by an apparatus for measuring middle ear dynamic characteristics accompanying mandibular movement according to the present invention is defined as a Y-axis and a distance is defined as an X-axis. An example is shown, and (b) shows an example of an edentulous person.

FIG. 2 is a graph in which the pressure in the ear cavity measured by the apparatus for measuring middle ear dynamic characteristics associated with mandibular movement according to the present invention is set to the Y axis, and the distance is set to the X axis.

FIG. 3 is a so-called Vessel banana characteristic diagram during mandibular position movement.

FIG. 4 is a side view showing a state in which the apparatus for measuring middle ear dynamic characteristics accompanying mandibular movement according to the present invention is mounted on a subject.

FIG. 5 is a perspective view of an apparatus for measuring middle ear dynamic characteristics associated with mandibular movement according to the present invention.

FIG. 6 is a block diagram of a compliance measuring circuit connected to a probe and a distance measuring means.

[Explanation of symbols]

10 subject, 11 ear canal, 12 eardrum, 13 probe, 14 earplug, 15 sound hole, 16 sound hole, 17
... air holes, 18 ... pressure sensors, 19 ... first amplifier, 2
0: second amplifier, 21: variable resistor for drift adjustment, 2
2: A / D conversion circuit, 23: microphone, 24: third
, An amplifier, 25 ... a filter, 26 ... a compliance circuit, 27 ... an earphone, 28 ... a fourth amplifier, 29 ... a preamplifier, 30 ... an oscillator, 31 ... a D / A conversion circuit, 32 ...
Control circuit, 33 ... distance measuring means composed of an ultrasonic transducer,
34 ... reflector, 35 ... drive circuit, 36 ... oscillator, 37 ...
Fifth amplifier, 38 ... Comparator, 39 ... Measurement circuit, 40 ...
Display, 41: Printer, 43: Right face bow, 44
... left face bow, 45 ... long hole, 46 ... adjustment screw, 47
... support arm, 48 ... screw, 49 ... screw, 50 ... support piece,
51: Projection bar, 52: Nose piece, 53: Adjusting bar, 5
4 ... adjustment screw, 55 ... cine, 56 ... support rod, 57 ... pin, 58 ... semi-circular ring, 59 ... tube part, 60 ... weight, 6
DESCRIPTION OF SYMBOLS 1 ... Arm, 62 ... Long hole, 63 ... Link, 64 ... Arm, 65 ... Fixing screw, 66 ... Fixing screw, 67 ... Spacing device, 68 ... Lead wire, 69 ... Compliance measurement circuit.

Claims (7)

[Claims] An intraocular compliance and a distance from the occlusal position of the upper and lower jaws are respectively set on a two-dimensional axis, and the compliance and the distance are used as parameters, and a change in compliance with a change in the distance from the occlusal position is determined. A method of displaying middle ear dynamic characteristics associated with mandibular movement, characterized in that the two-dimensional display is performed. 2. The pressure in the ear cavity and the distance from the occlusal position of the upper and lower jaws are respectively set on a two-dimensional axis, and the pressure and the distance are used as parameters, and the change in pressure with the change in the distance from the occlusal position is determined. A method of displaying middle ear dynamic characteristics associated with mandibular movement, characterized in that the two-dimensional display is performed. 3. A probe 13 attached to the external auditory canal 11 of the subject 10 for detecting dynamic compliance of the ear cavity, and a distance measuring means 33 for measuring a moving distance of the lower jaw with respect to the upper jaw of the subject 10. An apparatus for measuring middle ear dynamics associated with mandibular movement. 4. A probe 13 attached to the external auditory canal 11 of the subject 10 for detecting dynamic compliance of the ear cavity, a face bow 43, 44 attached with the probe 13 and attached to the subject 10, 55 attached to the lower jaw of the person 10, the cine 55 and the face bow 4
And a distance measuring means for measuring a distance between the lower jaw and the middle jaw. 5. The probe 13 has earplugs 14 provided with sound conducting holes 15 and 16 and an air hole 17 facing into the ear canal 11, and the air hole 17 converts a detected pressure into an electric signal. A pressure sensor 18 is connected to the sound conducting hole 15,
A microphone 23 and a compliance circuit 26 for converting an analog signal value of the microphone 23 into a compliance signal value are connected, and an earphone 27 for outputting a signal sound and an oscillator 30 for oscillating a probe tone are connected to the sound conducting hole 16. The apparatus for measuring middle ear dynamic characteristics associated with mandibular movement according to claim 3 or 4, wherein: 6. The distance measuring means 33 includes: a face bow 4;
5. The apparatus for measuring middle ear dynamic characteristics associated with mandibular movement according to claim 4, wherein the apparatus comprises an ultrasonic transducer provided on the side of the third and fourth sides and a reflecting plate provided on the side of the cine. 7. A face bow 43, 44 side and a scene 5
A space holding device 67 for holding a space between the space and the fifth side.
7. The apparatus for measuring middle ear dynamic characteristics associated with mandibular movement according to claim 4, 5 or 6, wherein: