JPS6121100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental occlusal sound measuring device for diagnosing the occlusal state of upper and lower teeth and performing treatments such as occlusal adjustment. In an occlusal sound measurement device that captures occlusal sound waves and draws them as visible vibration waveforms on a cathode ray tube, a pair of left and right occlusal sounds are used to capture left and right occlusal sounds that occur when teeth are occluding before, during or after treatment. microphone 1,1
The left and right occlusal analog signals before or during treatment captured by microphones 1 and 1 are A-D.
A-D converter 3 to convert and microphones 1, 1
Trigger level determiners 5, 5 which cut the right and left occlusal analog signals caught before or during treatment at a predetermined voltage, and convert the signals sent from the trigger level determiners 5, 5 into logic signals. a logic circuit 6 that stores the A-D converted articulation digital signal and the logic signal sent from the logic circuit 6; A D-A converter 10 converts signals retrieved from storage devices 8, 8 through a latch memory 9 into D-A converters, and a plurality of occlusal vibration waveforms drawn on a cathode ray tube 12 are individually moved. Has the ability to compare
This relates to an occlusal sound measuring device characterized in that it is comprised of a CRT control circuit 11, a cathode ray tube 12 that reproduces an occlusal vibration waveform via a chopping circuit 15 that makes the cathode ray tube 12 multi-phenomenal.

The occlusion of the upper and lower teeth has recently become important as a subject of dental treatment, and the quality of the occlusion is judged based on the occlusion sounds generated during occlusion. The simplest method for determining occlusal sounds is to use a stethoscope to listen to the state of occlusion during mandibular movement from the time the teeth collide until they separate, but this relies on the operator's individual auditory sense. Because it was extremely unstable and unreliable, a diagnostic device was developed and used that captures the occlusal sound with a microphone and draws it as a visible vibration waveform on a cathode ray tube to visually judge the occlusal state. I'm getting old.
For example, microphones are attached to the left and right cheekbones separately, the vibration waveforms of each are drawn on a two-phenomenal storage cathode ray tube, and the occlusal state is determined based on the shape of the waveforms and the differences between the left and right sides. be.

However, in conventional devices of this type,
As mentioned above, since a storage-type cathode ray tube is used, it is not possible to reproduce the waveform once erased, so in order to perform adjustment procedures while comparing the waveforms before and after occlusal adjustment, it is necessary to record them on a pen recorder or use a cathode ray tube. This requires a recording operation such as manually copying the above waveform, and is not suitable for performing diagnosis and adjustment procedures smoothly and efficiently. Furthermore, the invention described in Japanese Patent Application Laid-Open No. 50-76882 is a system in which digital information about the occlusion before and during treatment is stored in four shift registers, and this digital information is converted into analog and recorded on chart paper. However, since this method uses only one microphone and a chat recorder, it is possible to simultaneously reproduce the left and right occlusal vibration waveforms and compare whether or not the left and right occlusion is occurring at the same time. If you can't do it,
It is also not possible to move and superimpose the occlusal vibration waveforms to compare the occlusal state, which has the drawback of lacking speed and accuracy in diagnosis.

The present invention was made with the aim of solving such problems, and after storing the waveforms of occlusal sounds individually generated each time or depending on the location of occurrence in a storage device, the waveforms of occlusal sounds can be stored in a storage device and then The waveforms can be reproduced simultaneously or individually on a cathode ray tube at the same time, and if necessary, the waveforms can be reproduced and reconfirmed while adjusting the occlusion, and comparisons can be made before and after the adjustment to make the treatment more efficient. The present invention provides an occlusal sound measuring device that can be advanced. In addition, in such a device, by making it possible to individually move the position of each vibration waveform on the cathode ray tube, up, down, left, and right, two or more waveforms can be arranged closely or overlapped, and both can be easily moved. A second object is to provide an occlusal sound measuring device that allows easy comparison and more accurate diagnosis.

Embodiments of the present invention will be described below with reference to the drawings.

In the block diagram shown in Fig. 1, numeral 1 is a microphone that is worn across the patient's head like binaural headphones, and each microphone 1 is placed on the cheekbones below the eyes on the left and right sides. Catch the bite sounds separately. A ₁ is a first analog section, and the occlusal sound caught by microphones 1, 1 is amplified by amplifiers 2, 2, and sent to a second digital circuit D ₂ via an A/D converter 3. Reference numeral 4 denotes a monitor speaker, which allows visual diagnosis of the vibration waveform reproduced on the cathode ray tube 12 and auditory diagnosis in parallel. The signal is also sent to the trigger level determiners 5, 5, and is, for example, 1/3 of the maximum amplitude value.
The signal is cut at the threshold voltage of 1 and sent to the first digital circuit _D1 .

The first digital circuit _D1 consists of a logic circuit 6 and a timing control circuit 7, and the signal sent from the trigger level judger 5 is converted by the logic circuit 6 into a logic signal with a fine waveform omitted. It is sent to the second digital circuit _D2 . The timing control circuit 7 includes a clock pulse generation circuit and the like, and controls the second digital circuit _D2 and other operations of the apparatus.

The second digital circuit _D2 has storage devices 8, 8 consisting of random access memories, and the digital signals sent from the A/D converter 3 and the logic signals sent from the logic circuit 6 are stored in the storage devices 8,
8, and are sent to the D/A converters 10, 10 of the second analog section _A2 via latch memories 9, 9 by a predetermined call.

The signal of the occlusal sound is restored to the original analog waveform by the D/A converters 10, 10, and is input to the cathode ray tube 12 used as a display section via the CRT control circuit 11 and the chopping circuit 15. The vibration waveform of the occlusal sound is reproduced on the display screen. The cathode ray tube 12 is used for two phenomena (three or more phenomena are possible if necessary) by a chopping circuit 15.
2, as shown in Figure 2a, it is possible to draw the right waveform a and the left waveform b at the same time, but it is of course also possible to display only one waveform depending on the control signal. It's getting old. Further, the output of the D/A converters 10, 10 is output from the output terminal 13,
13, for example, the pen recorder 14.
It is now possible to connect and record. Also
The CRT control circuit 11 has the role of a vibration waveform moving device, and is used to individually move the right waveform a and the left waveform b drawn on the cathode ray tube 12 vertically and horizontally to adjust their positions. Diagnosis and judgment of treatment progress can be made easier by displaying a and b closely vertically, or by displaying waveforms c ₁ and c ₂ before and after occlusal adjustment close together or overlapping each other as shown in Figure 2 b. I am learning how to do it. Second
Figure c shows an example in which the occlusal sound converted to a logic signal is displayed as a pulse waveform.The fine waveforms are omitted and the main waveforms are emphasized.
In addition to being able to more clearly display the points of difference between the two waveforms, it is also possible to easily check the time difference t between the right waveform a and the left waveform b, allowing you to compare the occlusal status of the left and right teeth. Suitable for determining areas that require occlusal adjustment and treatment details.
In addition, the vibration waveform of the occlusal sound before treatment is stored in one of the two-channel storage devices 8, 8 (of course, three or more channels may be used), and the channel is then switched to form the vibration waveform of the occlusal sound after the treatment. is stored in the other storage device 8, and at the same time the cathode ray tube 12
By doing so, it is possible to compare and examine the vibration waveforms of occlusal sounds before and after treatment.

The configuration and operation of this device are as described above, but it also displays markers on the cathode ray tube as a time axis scale, allows the sweep time of the horizontal axis to be changed over several stages, and has other functions similar to those of a cathode ray tube oscilloscope. By appropriately adding various functions normally added to the occlusal sound measuring device, it is possible to make the occlusal sound measuring device even easier to use. In addition, in the above embodiment, only the block diagram is shown and the specific connections of each block are not shown, but the specific connections are selected as appropriate to achieve the functions described above. and can be adopted. In the embodiment, the occlusal sounds are treated separately in the two left and right channels, but in order to make a more accurate diagnosis, the number of channels may be further increased to draw many vibration waveforms on the cathode ray tube at the same time. You can also do it. Note that instead of using the chopping circuit, a multiphenomenal cathode ray tube may be used to reproduce a plurality of vibration waveforms simultaneously.

As mentioned above, since the present invention has a pair of left and right microphones, it is possible to separately capture the left and right occlusion sounds that occur during occlusion of teeth before, during or after treatment, and to record A-D converted occlusion. Since it has multiple storage devices that store digital signals and logic signals sent from logic circuits, it is possible to independently store left and right occlusal sounds as well as occlusal sounds before, during, and after treatment. Since it has a trigger level judger, all small vibrations that occur during occlusion are ignored, and only large occlusal vibrations that are above the trigger level are picked up and displayed on the cathode ray tube as an easy-to-see occlusal vibration waveform. The cathode ray tube can be multi-phenomenalized using the circuit, and multiple occlusal vibration waveforms drawn on the cathode ray tube can be individually moved using the CRT control circuit, so individually memorized occlusal vibration waveforms can be reproduced as needed. It is easy to reconfirm, recall the before and after treatment or left and right occlusal vibration waveforms, project them on the top and bottom of the CRT, compare the occlusal vibration waveforms, and check the timing of the left and right occlusal vibration waveforms. By displaying the occlusal vibration waveforms above and below the CRT, it is possible to clearly identify the starting points of left and right occlusion.In other words, if the starting points of left and right occlusion are significantly different, it means that the occlusal condition is poor.) Storage type CRT It has the advantage of being able to diagnose occlusal conditions and make adjustment procedures more efficient and smooth compared to conventional devices that use .

Furthermore, each vibration waveform drawn on the cathode ray tube can be moved vertically and horizontally to adjust its position using the CRT control circuit, so the vibration waveform of the occlusal sound can be individually captured depending on the location or time of occurrence. After storing these vibration waveforms individually, it is easy to reproduce these vibration waveforms on a cathode ray tube at the same time, move the two waveforms up and down and left and right, bring them closer together, or overlap them, and compare the two waveforms. This allows for more accurate diagnosis.

As described above, the present invention provides a pair of left and right microphones, a plurality of storage devices, a logic circuit, a trigger level determiner, a CRT control device,
By organically and integrally combining a "chipping circuit", a "cathode ray tube", etc., it was possible to create an extremely practical diagnostic device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG.
Figures a, b, and c respectively show waveform diagrams drawn on the cathode ray tube in the same manner. 1 is a microphone, 3 is an A/D converter, 5 is a trigger level judge, 6 is a logic circuit, 8 is a storage device, 9 is a latch memory, 10 is a D/A converter,
11 is a CRT control circuit, 12 is a cathode ray tube, and 15 is a jumping circuit.

Claims (1)

[Claims] 1. An occlusal sound measurement device that captures the occlusal sound waveforms generated during occlusion between upper and lower teeth and draws them as visible vibration waveforms on a cathode ray tube. A pair of left and right microphones that respectively catch occlusal sounds, an A-D converter that converts the left and right occlusal analog signals before or during treatment caught by the microphones from A to D, and pre-treatment sounds caught by the microphones. or a trigger level determiner that cuts the left and right occlusal analog signals during treatment at a predetermined voltage, and a logic circuit that converts the signal sent from the trigger level determiner into a logic signal and sends it to the next storage device; - A plurality of storage devices that store the D-converted occlusal digital signals and the logic signals sent from the logic circuit, and a D-A conversion of the signal read from the storage device by a predetermined call through the latch memory. -A
It has a transducer and a function to individually move and compare multiple occlusal vibration waveforms drawn on a cathode ray tube.
An occlusal sound measuring device comprising a CRT control circuit and a cathode ray tube that reproduces an occlusal vibration waveform via a chopping circuit that makes the cathode ray tube multiphenomenal.