JPS6125547A - Occulusion pressure detection sheet - 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] [Industrial Application Field] The present invention provides a simple and easy method for occlusal adjustment in the so-called dental field.
This invention relates to an occlusal pressure detection sheet that can be used accurately.

[Prior art]

Conventionally, when dentists perform occlusal adjustment, methods such as (1) marking with articulating paper, (2) measurement of occlusal sounds, and K-based methods have been adopted.

However, using method ■, the temporal lP factors of occlusal abnormalities (
There is a serious problem that it cannot be detected (described later).
In addition, because the method uses an object to detect contact between the occlusal teeth of the upper and lower jaws, it is difficult to distinguish between true markings and stains. There are also problems with the lack of sex.

In other words, when considering a person's dentition, which of the teeth in the upper and lower jaws will engage first (in which teeth initial contact occurs), and in what order will the teeth engage together? Although the above-mentioned time factor is extremely important for the health of the teeth and gums, it has been difficult to perform occlusal adjustment simply and accurately using conventional methods.

In addition, the use of the occlusal sound described in (■) has high utility value in terms of accuracy and reproducibility, but until the contact sound is projected or recorded on a screen or recorder and a waveform with a constant width is reproduced. There were problems such as the need for the patient to practice occlusion many times, the skill of the surgeon, and the large size of the device.

Other conventional methods of adjusting occlusal pressure include using ribbon wax or celluloid strips, or examining occlusal contact by touch with the surgeon's fingertips, but these methods are no longer the same as those described above. Similarly, it had the problem of requiring skill from the user.

[Purpose of the invention]

The present invention solves the above-mentioned problems of conventional methods and devices, and eliminates the need for particular skill on the part of the operator, and eliminates the occlusal order of upper and lower teeth, that is, the time factor, and the pressure caused by the tooth arrangement during occlusion. The purpose of this invention is to provide an inexpensive device that can easily and accurately measure distribution.

[Structure of the invention]

As shown in the examples, the present invention consists of two films 1.2 formed of ink with good electrical conductivity and provided with electrodes that can be connected to a power source to form a predetermined electrode pattern, and a film 1.2 interposed between these films. The film 1.2 is an occlusal pressure detection sheet characterized in that the film 1.2 is provided with corresponding electrodes facing each other.

In another embodiment, the present invention includes two films 1.2 formed of ink with good electrical conductivity and provided with electrodes that can be connected to a power source to form a predetermined electrode pattern; A film 6 made of a pressure-sensitive conductive polymer interposed between the films and a heat-sensitive coloring sheet 4 are polymerized, and the film 1.2 is provided so that corresponding electrodes face each other, and the heat-sensitive coloring sheet 4 This is an occlusal pressure detection sort characterized by being superimposed on either one of the films 1.2.

〔Example〕

An embodiment of the present invention will be explained based on FIGS. 1 to 3. The occlusal pressure detection sheet 20 is constructed by superimposing films 1.3 and 2, both of which are formed into a horseshoe shape, in this order. . The film 2 is made of a thin synthetic resin sheet such as polyester, and on one side thereof, a plurality of electrodes 21 made of ink with good electrical conductivity are arranged in a shape corresponding to the row of human teeth. A pattern is constructed.

Furthermore, a linear conductor with a fine diameter is arranged corresponding to each of the plurality of electrodes 21, and one end of these linear conductors is on the connection terminal 22, and the other end is connected to the electrode 21. ing.

These electrodes 21 and linear conductors are each made of a mixture of carbon and silver or a two-layer structure of carbon and silver.
They are simultaneously printed on the film 2 by silk printing.

The film 1 is constructed symmetrically with the film 2, but is otherwise the same as the film 2, with the film 3 interposed so that the corresponding electrodes 11 and 21 face each other. Polymerized. This film 3 is made of variable resistance type pressure sensitive conductive rubber as described later with a thickness of 01 to 0.
．． It is molded to a length of about 5 m and is bonded by polymerizing with the film 1.2 or adhering to their outer edges.

And electrode 1. ．． 21 is in contact with the film 3 (FIG. 3(b)) or in a non-contact state (FIG. 3(a)).

By the way, as shown in Fig. 9, the resistance change type pressure-sensitive conductive rubber described above has K, and when pressure is applied to it, the electrical resistance of that part decreases (increases) depending on the high (low) pressure K. It has electrical properties that are in contrast to the ON-OFF type. Therefore, when a voltage is applied between the front and back surfaces of this rubber, a current flows depending on the pressure acting on the rubber, so by measuring this current value, it is possible to know the value of this pressure. It is possible.

Next, the mode of use of the above-mentioned occlusal pressure detection sheet 20 (shown in FIG. 3(a)) will be explained according to FIG. 4.
In this figure, E is a power source, R is a resistor, 5 is an amplifier, 6 is a computer, 7 is an interface, 8 is a screen such as a cathode ray tube, 9 is an image printer, and connection terminals h and 22 of the occlusal pressure detection sheet 20 are respectively It is connected to the positive and negative poles of the power source E via a connector (not shown). By connecting these instruments as shown in FIG. 4, an occlusal pressure measuring device is constructed.

Therefore, when measuring occlusal pressure with this device, the power source E is applied in advance to connect the connecting terminals 12 and 22 with K, for example, 20 mm.
The occlusal pressure detection sheath 420 to which a DC voltage of ~30 V is applied is placed in the oral cavity (in FIG. 4, the single-dot chain # shows the inside of the oral cavity) and set between the upper and lower teeth. Then, force is gradually applied to the lower jaw until the upper and lower teeth are fully interlocked.

When the occlusal pressure detection sheet 20 is bitten in this way, the electrodes 1 face each other where the upper and lower bacteria bite together.
] and 21 pinch the film 3, and at the same time pressure is applied to the film 6, the electrodes 11 and 21 are electrically connected through the film 3.

Therefore, among the plurality of electric circuits formed in the same number as the number of electrodes 11.21, that is, the electric circuit including the power source E, the electrode 11, the film 3, the electrode 2], and the resistor R, the electrode 1
A current flows only where 1 and 21 are electrically connected through the film 3, and the value of this current is determined by the pressure applied to the film 3.

In the embodiment shown in FIG. 4, however, the current value is measured indirectly. That is, the value of the voltage drop across the resistor R in the electric circuit is extracted as the output voltage, amplified by an amplifier, processed by the computer 3 and the interface 7, the obtained result is displayed on the screen 8, and further Accordingly, the image printing mK is set to be recorded.

In this case, the screen 8 displays the elapsed time from the start of occlusion to the time when the last occlusion occurs and the pattern of the dentition as shown in Figure 2, as well as the occlusion order and occlusal pressure for each tooth. It is shown on the mold, and a blinking display is performed for the first tooth to bite.

Further, it is also possible to display the height of the occlusal pressure by color shading, if desired. Note that the same effect can be obtained by using the occlusal pressure detection sheet shown in FIG. 3(b).

By the way, since this kind of occlusal pressure measuring device is used by dentists to adjust occlusion, it is necessary to repeat the above operation many times while cutting the tip of the tooth or prosthesis. , In order to make this operation easier, K may connect a plurality of occlusal pressure detection sheets 20 in parallel according to FIG. 4 (as described later, this sheet F'
When the occlusal adjustment is completed, the results of the adjustment can be printed using an image printing machine to satisfy the needs of both the dentist and the patient.

In the present invention, as shown in FIG. 8, a thermosensitive coloring sheet 4 such as a liquid crystal film may be superimposed on the film 2 (or 1). That is, the occlusal pressure is more easily displayed on a film, rather than being taken out as an image on a screen as in the above embodiment.

To explain this specifically, a current corresponding to the occlusal pressure flows through the film 3 and turns into Joule heat, and this film partially generates heat, and this heat causes the heat-sensitive coloring sheet 4 to partially develop color. The level of occlusal pressure can be quickly and accurately determined by displaying the shading.

In such an embodiment, it is preferable to attach and detach the heat-sensitive coloring sheets 4 one on top of the other, so that occlusal pressure can be easily measured multiple times by replacing them with new sheets after use.

In the present invention, various shapes are possible for the electrode pattern, and matrix shapes as shown in FIGS. 5 and 6 are also acceptable.
In this case, as shown in FIGS. 7(a) and 7(b), a plurality of linear or band-shaped electrodes may be arranged in a striped manner, or the electrodes 21 of the film 2 may be arranged in a scattered manner in the example shown in FIG. Alternatively, these may be connected to form a horseshoe shape.

In the matrix-like electrode pattern, the dimensions of each electrode are made smaller than those in the example shown in FIG. 1, so there is an advantage that the occlusal pressure distribution can be detected in more detail.

In other words, the conductor used for the electrode is generally a good conductor of heat, so if the entire measurement surface is covered with the electrode, heat will diffuse from the high temperature side to the low temperature side, and the color change of the thermosensitive coloring sheet will spread to the surrounding area. It becomes impossible to determine whether or not this is the area where occlusal pressure is truly applied.

Furthermore, when using the occlusal pressure detection sheet shown in FIGS. 7(a) and 7(b), the electrode 1 of the film 1 and the electrode 22 of the film 2 may be overlaid so that they are orthogonal to each other, but it is possible to Therefore, by providing only one U-shaped electrode for film 1 and indirectly superposing films 1 and 2, it is also possible to configure a substantially horseshoe-shaped electrode pattern. In addition, in FIG. 7, 11 is a connector connected to the power source E.

Further, as the film 3, it is possible to use a material other than rubber as long as it has high pressure-sensitive conductivity and its electrical resistance is uniquely determined by pressure.
Rubber material is best. This is because the rubber material is highly flexible and deforms easily and freely when biting between the upper and lower teeth, resulting in an accurate occlusal pressure distribution that cannot be obtained with conventional articulating paper.

In other words, with conventional articulating paper, once used, the contact area is marked and does not disappear, and because it is paper, it is weak and must be thrown away. C) 20 is made of rubber (
Since it is made of a pressure-sensitive conductive polymer, it has excellent flexibility and strength, and it also has resilience, so it has the remarkable advantage of being able to be used multiple times by washing it off after use. There is.

〔Effect of the invention〕

According to the present invention, the time factor (occlusal order) when performing occlusion, the time factor (occlusal order), Since the distribution of occlusal pressure can be known, the occlusal adjustment work is significantly streamlined, and the structure is simple, so it can be manufactured at low cost, and the shape of the detection sheet can be changed to an appropriate one. By doing so, the present invention can be widely applied to the design of beds for small and elderly people who sleep, and to devices for measuring body pressure distribution.

[Brief explanation of drawings]

1 to 3 (1k) and (b) show an embodiment of the present invention, in which FIG. 1 is a plan view of the occlusal pressure detection sheet, FIG. 2 is a plan view of the film 2, and FIG. a) and (b) are shown in Figure 2 1
4 is a flow sheet of an occlusal pressure measuring device to which the occlusal pressure detection sheet of FIG. FIGS. 7(a) and 7(b) are respectively plan views of the film 1.2 in yet another embodiment, and FIG. 8 is a plan view of the film 1.2 in yet another embodiment. FIG. 9, which is a sectional view of the main part of the pressure detection sheet, is a diagram showing the electrical characteristics of the film 3. 1.2.5... Film, 1+, 2+... Electrode, 12, 22... Connection terminal, 4... Thermosensitive coloring sheet, 5... Amplifier, 6... Computer, 7...・
Interface, 8...screen? ...Gawei printing machine, 11...connector, 20...occlusal pressure detection sheet.

Claims (1)

[Claims] 1. Two films (1) and (2) formed from ink with good electrical conductivity and provided with electrodes that can be connected to a power source to form a predetermined electrode pattern, and a gap between these films. and a film (3) made of a pressure-sensitive conductive polymer interposed therein, the films (1) and (2) being provided with corresponding electrodes facing each other. Pressure detection sheet. 2. The occlusal pressure detection sheet according to claim 1, wherein the electrode patterns of the films (1) and (2) are constructed in plane symmetry with respect to each other. 3. The occlusal pressure detection sheet according to claim 2, wherein the electrode pattern is arranged in a matrix shape. 4. A patent claim characterized in that the films (1), (2), and (3) are horseshoe-shaped, and the electrode pattern is configured in a shape corresponding to a human tooth row. The occlusal pressure detection sheet according to the range 2 or 3. 5. The electrode patterns of the films (1) and (2) are composed of a plurality of linear or strip-shaped electrodes arranged in a striped pattern, and the electrodes of the film (1) and the film (2) are arranged in stripes.
2. The occlusal pressure detection sheet according to claim 1, wherein the films are opposed to each other such that the electrodes of the occlusal pressure detection sheet intersect with each other. 6. The occlusal pressure detection sheet according to claim 1, wherein the film (3) is made of a variable resistance pressure-sensitive conductive rubber. 7. Two films (1) and (2) formed from ink with good electrical conductivity and arranged with electrodes that can be connected to a power source to form a predetermined electrode pattern, and a pressure-sensitive film interposed between these films. A conductive polymer film (3) and a heat-sensitive coloring sheet (4) are polymerized, and the film (3) is made of a conductive polymer.
1) and (2) are provided so that corresponding electrodes face each other, and the thermosensitive coloring sheet (4) is provided with the film (1).
), (2). 8. The thermosensitive coloring sheet (4) is the film (1)
or (2), the occlusal pressure detection sheet according to claim 7, wherein the sheet is removably attached to the occlusal pressure detection sheet. 9. The occlusal pressure detection sheet according to claim 7 or 8, characterized in that the electrode patterns of the films (1) and (2) are constructed in plane symmetry with respect to each other. 10. The occlusal pressure detection sheet according to claim 9, wherein the electrode pattern is arranged in a matrix shape. 11. A patent claim characterized in that the films (1), (2), and (3) are horseshoe-shaped, and the electrode pattern is configured in a shape corresponding to a human tooth row. The occlusal pressure detection sheet according to item 9 or 10. 12. The electrode patterns of the films (1) and (2) are
It is composed of a plurality of linear or strip-shaped electrodes arranged in a striped pattern, and the electrode of the film (1) and the electrode of the film (
Claim 7, characterized in that these films face each other so that the electrodes of 2) intersect.
Occlusal pressure detection sheet described in section. 13. The occlusal pressure detection sheet according to claim 7, wherein the film (3) is formed of a variable resistance pressure-sensitive conductive rubber.