JPH0622989A - Occlusion sheet - Google Patents

Abstract

PURPOSE:To obtain an occlusion sheet which can correctly print the early contact patts directly on the upper and lower teeth and can diagnose an occlusion anomaly part easily and precisely. CONSTITUTION:Microcapsules 5 in which one kind of substance between two kinds of substances 4 and 7 which generate coloring reaction in contact with each other is sealed and a layer of a pressure-sensitive coloring agent 2 which contains the other substance among the above-described two kinds of substances and generates a coloring reaction when between two kinds of substances are brought into contact through the breakage of the microcapsules 5, are formed in exfoliation enabled manner on the surface of a supporting member 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an occlusal sheet for marking on a tooth a portion that is brought into early contact when upper and lower teeth are engaged with each other.

[0002]

2. Description of the Related Art Conventionally, carbon paper has been used for dentistry in order to determine whether the occlusal relationship between upper and lower teeth is correct. When a patient bites the carbon paper with upper and lower teeth, ink adheres to the contact surfaces of the upper and lower teeth. Therefore, the occlusal state of the upper and lower teeth can be grasped by observing the colored portion of the tooth due to the adhesion of the ink.

[0003]

However, in the conventional occlusal test using carbon paper, the teeth are colored by the carbon paper even if the teeth are in contact with the carbon paper. Therefore, it is widely colored even in parts other than those requiring grinding. Therefore, it is not possible to accurately know the early contact portions of the upper and lower teeth to which an unreasonable occlusal pressure is applied simply by observing the colored portion of the teeth made of carbon paper or the occlusal portion of carbon paper.

[0004] Therefore, the inventor of the present invention has proposed an occlusal sheet in which carbon ink is applied to the surface of the upper leaf paper of carbonless paper in order to accurately know the portion to be ground. When this bite sheet is bitten, the carbon ink on the surface of the upper paper adheres to the tooth contact surface in the same way as conventional carbon paper, and the color-developing surface of the carbonless paper has the highest contact area between the upper and lower teeth. Only the area where a large bite pressure is applied develops color. However, in order to know exactly which part of the tooth the maximum occlusal pressure was applied to, it is necessary to compare the color-developed part of the carbonless paper with the part to which the carbon ink of the tooth is attached, and the comparison work is troublesome. there were.

Therefore, an object of the present invention is to obtain an occlusal sheet which can accurately and directly mark the early contact parts of the upper and lower teeth on the teeth and can easily and accurately diagnose the occlusal abnormal part. And

[0006]

The occlusal sheet according to the present invention for achieving the above object comprises a microcapsule in which one of two kinds of substances which produce a color reaction when contacting each other is encapsulated, and the above-mentioned two. On the surface of the supporting substrate, a layer of a pressure-sensitive color developing agent that contains the other of the two types of substances and is mainly responsible for the color reaction when the two types of substances come into contact with each other due to the destruction of the microcapsules. It is characterized in that it can be peeled off.

[0007]

EXAMPLE An example of the occlusal sheet according to the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows an occlusal sheet according to a first embodiment of a part of a cross section perpendicular to the surface thereof. The occlusal sheet according to Example 1 is composed of the supporting base material 1,
A layer of the pressure-sensitive color developing agent 2 is provided on the supporting substrate 1. In the case of this embodiment, the supporting base material 1 is plain paper and has a shape similar to that of the base paper of the conventional articulating paper. Further, a known silicon-based release agent 3 is uniformly applied over the entire surface. On the release agent 3 on the surface of the supporting substrate 1, the layer of the pressure-sensitive color developing agent 2 is spread in the same place as the carbon ink in the conventional articulating paper. That is, the layer of the pressure-sensitive color developing agent 2 may occupy the entire surface of the release agent 3, or may spread only to the place where the upper and lower teeth are expected to hit when the bite sheet is bitten. .

As the pressure-sensitive color developing agent 2, microcapsules 5 enclosing a solution 4 of a colorless dye are mixed with a binder made of an aqueous solution adhesive made of starch as a raw material and applied onto the release agent 3 substantially uniformly. The coloring agent 6 thus obtained and the solid acid 7 in the form of fine particles which bring about a color reaction upon contact with the solution 4 of the colorless dye are mixed with the above-mentioned binder and applied substantially evenly on the layer of the coloring agent 6. And a developer 8 formed by Note that, in FIG. 1, the microcapsules 5 are shown as arranged in a line in order for simplification of the drawing, but in reality, they are not arranged in order, and their sizes are not constant. The colorless dye solution 4 contained in the microcapsules 5 is, for example, a solution of crystal violet lactone, which is a kind of triphenylmethane phthalide compound, dissolved in cottonseed oil. Further, this microcapsule 5 uses, for example, Saran as a capsule film,
The diameter is about 5 microns. The solid acid 7 in the color developer 8 is, for example, activated clay.

The application of the microcapsules 5 and the solid acid 7 to the supporting substrate 1 is carried out by adjusting the amount of the binder to an appropriate amount so that when the microcapsules 5 in the color forming agent 6 are destroyed, a colorless dye solution 4 is obtained. And the solid acid 7 in the layer of the color developer 8 are brought into contact with each other to cause a color reaction. This coating is the same as the coating of the microcapsules 5 and the solid acid 7 on the known carbonless paper except that the microcapsules 5 are coated on the supporting substrate 1 via a release agent.

In order to simultaneously mark the early contact portions on the occlusal surfaces of the upper and lower teeth, a layer of the pressure-sensitive color developing agent 2 is required for each of the upper and lower teeth. Therefore, in that case, it is preferable to use an occlusal sheet in which two occlusal sheets according to the first embodiment are superposed so that the back surfaces of the supporting base materials 1 are back-to-back. Further, if necessary, an occlusal sheet having a layer of the pressure-sensitive color developing agent 2 similar to the upper side may be used not only on the upper side of the supporting base material 1 of Example 1 but also on the lower side.

As shown in FIG. 2, when the surface of the layer of the pressure-sensitive color developing agent 2 of this occlusal sheet is applied to the tooth 9 to be treated of the patient and the upper and lower teeth 9 and 10 are engaged with each other, the pressure-sensitive color developing agent is 2 is pressed against the tooth 9, and the pressed portion adheres to the tooth 9. At the same time, the microcapsules 5 in the layer of the pressure-sensitive color developing agent 2 are destroyed by the occlusal pressure generated in the early contact portions 11 of the upper and lower teeth. Then, in the portion 12 where the microcapsule 5 is destroyed, the solution 4 and the solid acid 7 in the layer of the color developer 8 come into contact with each other to cause a color reaction. The portion 13 of the layer of the color developer 8 where the color reaction has occurred exhibits a blue color according to this embodiment. After that, when the upper and lower teeth 9 and 10 are opened, the portion of the layer of the pressure-sensitive color developing agent 2 that is pressed against and adheres to the support substrate 1 is peeled off and transferred to the tooth 9 as shown in FIG. To do. Therefore, when the bite sheet is bitten, the early contact parts of the upper and lower teeth are marked in blue on the teeth. In addition,
According to this embodiment, since the colorless dye is used, the contrast of the colored portion is good and the printed portion can be easily grasped. If necessary, a fluoran compound may be used as a colorless dye to give a red color, for example.

By the way, the microcapsules 5 are not destroyed around the early contact portions 11 of the upper and lower teeth because they are not subjected to sufficient pressure due to the gap between the upper and lower teeth.
No color reaction occurs in the portion of the layer around the early contact portion 11 of the upper and lower teeth. For example, when the diameter of the microcapsule 5 is 5 microns, the microcapsule 5 will not be destroyed if the gap between the occlusal surfaces of the upper and lower teeth is 5 microns or more. The smaller the diameter of each microcapsule 5, the more precise is the marking of the early contact portions of the upper and lower teeth, and the shape of the small early contact portions of the upper and lower teeth is faithfully marked on the teeth.

Therefore, by observing the marked portions of the teeth while biting the occlusal sheet, it is possible to know the early contact parts of the upper and lower teeth accurately and immediately.

Assuming that only the pressure-sensitive color-imparting agent is directly applied to the teeth for chewing, the diameter of each microcapsule is 5
When the size is as small as micron, the marking is performed with high accuracy.
However, in the very small contact area between the upper and lower teeth, the coloration area is also very small. Therefore, when the pressure sensitive color developing agent is directly chewed to mark a very small early contact portion of the upper and lower teeth, if the accuracy is too high, the color developing portion is difficult to see and the treatment efficiency is poor. Therefore, in this embodiment, the support base material 1 having a thickness of about 50 μm is configured to hold the pressure-sensitive color developing agent 2. With this configuration, when the occlusal sheet is bitten by the upper and lower teeth, the supporting base material is compressed at the early contact portions of the upper and lower teeth to disperse the compressive force around the supporting base material, and the occlusal force of the teeth. Widen the range. for that reason,
Even in the portion around the early contact portions of the upper and lower teeth, where the upper and lower teeth are very close to each other, the microcapsules will be pressed by the supporting base material and broken. As a result, the color range is slightly expanded. Therefore, when a very small contact portion of the upper and lower teeth is printed, it is possible to prevent the inconvenience that the coloring portion is too small to be visually recognized because the printing precision is too high.

The developer 8 in the occlusal sheet according to the second embodiment shown in FIG. 4 is the second support base material 14 obtained by solidifying a rewetting adhesive made of modified starch such as dextrin as a raw material into a film. Of the solid acid 7 adhered almost uniformly on the surface of the same with the same rewetting adhesive as a binder. Further, the color former 6 is composed of the microcapsules 5 similar to those in Example 1, which are adhered onto the layer of the color developer 8 almost uniformly using the binder. The layer of the color former 6 is merely in contact with the first supporting substrate 1 having the surface coated with the release agent 3 and is not adhered thereto. The layer of the pressure-sensitive color developing agent 2 is the second supporting substrate 1
4 is held by being adhered to the supporting base material 1 at its edge (not shown). When this bite sheet is bitten, the microcapsules 5 are broken by the bite pressure due to the early contact portion, the solution 4 of the colorless dye in the microcapsules 5 adheres to the solid acid 7, and at the same time, the second support group is assisted by the moisture adhering to the teeth. The pressure-sensitive color developing agent 2 adheres to the teeth together with the material 14.

Although the first and second embodiments have been described above, the embodiments of the present invention can be variously changed as needed without changing the gist of the invention.

For example, in the occlusal sheets of Examples 1 and 2, the layer of the pressure-sensitive color developing agent 2 is replaced with the layer of the color developing agent 6 and the layer of the developing agent 8 to develop the color on the supporting substrate 1. You may comprise so that it may contact the agent 8. Alternatively, both the colorless dye solution 4 and the solid acid 7 may be microencapsulated, uniformly mixed, combined with a binder, and applied to form a single layer. In addition, an aqueous solution of a water-soluble compound is used as two kinds of substances that bring into contact with each other to cause a color reaction.
There may be a case where a microcapsule in which a condensation polymer is wrapped with a wall material is used, or another silicate, an inorganic salt or an organic compound is used instead of activated clay. Further, the two kinds of substances that come into contact with each other to cause a color reaction are not limited to the solid acid 7 and the colorless dye solution 4, and may be liquids. The substance to be microencapsulated is not limited to liquid. When the colored substance is a liquid, the liquid may be attached to the teeth for marking. Further, the binder for holding the two types of substances that undergo color reaction on the supporting base material 1 is not limited to a solidified substance after coating.

The supporting substrate 1 can be changed to a plastic film, cloth or the like. If the surface of the supporting base material 1 has good releasability, the release agent is unnecessary.

In the occlusal sheet of Example 1, the pressure-sensitive color developing agent 2 was added in order to more securely adhere the pressure-sensitive color developing agent 2 to the teeth.
An adhesive may be applied to the surface of the. A rewetting adhesive may be used as the binder.

Further, in the second embodiment, the layer of the pressure-sensitive color developing agent 2 adhered to the second supporting base material 14 is exposed by adhering the solid acid 17 to the surface of the second supporting base material 14. As the layer of the colorant 8, the microcapsules 5 are adhered to the surface of the first supporting substrate 1 to form the layer of the color former 6, and the layer of the color developer 8 and the layer of the color former 6 are simply brought into contact with each other. The developer 8 and the color developer 6 may be separated from each other. Further, the second supporting base material 14 also includes a material which is not called a rewetting adhesive as long as it has rewetting adhesiveness. In addition, the first support base material and the second support base material are separately prepared, and the second support base material is superposed on one or both surfaces of the first support base material at the time of inspection. It is included in the occlusal sheet of the present invention.

[0022]

When the occlusal sheet of the present invention is bitten by the upper and lower teeth, the pressure-sensitive color developing agent is pressed against the teeth. At the same time, the microcapsules contained in the pressure-sensitive color developing agent are destroyed by occlusal pressure. Then, the two types of substances capable of color reaction, which had been prevented from contacting by the microcapsules until then, came into contact by the destruction of the microcapsules, and as a result, the pressure-sensitive color developing agent was present at the part where the microcapsules were destroyed. To color. When the user stops chewing and opens his mouth, the portion of the pressure-sensitive color developing agent layer that is pressed against the teeth is peeled off from the supporting base material and transferred to the teeth.

Even if the pressure-sensitive color developing agent adheres to the tooth, it does not develop color unless the microcapsules are destroyed by the occlusal pressure. Therefore, the colored portion of the pressure-sensitive color developing agent adhering to the tooth is occlusal. Does not spread to the area where the seat and teeth are in slight contact.

Therefore, by inserting the bite sheet of the present invention between the upper and lower teeth and biting, the early contact portion where the occlusal pressure is unduly increased is limited to a small area at the center of the early contact portion. It is possible to imprint directly on the occlusal surface of teeth much more accurately than conventional carbon paper. Therefore,
By using the occlusal sheet of the present invention, it is possible to easily and accurately diagnose an occlusal abnormal portion that requires cutting of upper and lower teeth.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a model of a part of an occlusal sheet according to a first embodiment.

FIG. 2 is a schematic cross-sectional view showing a state in which the bite sheet according to the first embodiment is biting.

FIG. 3 is a schematic cross-sectional view showing a state in which the mouth is opened after the bite sheet according to the first embodiment is bitten.

FIG. 4 is a cross-sectional view showing a model of a part of an occlusal sheet according to a second embodiment.

[Explanation of symbols]

 1 Supporting Substrate 2 Pressure Sensitive Coloring Agent 3 Release Agent 4 Solution of Colorless Dye 5 Microcapsules 6 Coloring Agent 7 Solid Acid 8 Developer

Claims (1)

[Claims] Microcapsules encapsulating one of the two types of substances that produce a color reaction when contacting each other, and the other of the two types of substances, and by the destruction of the microcapsules An occlusal sheet comprising a layer of a pressure-sensitive color developing agent, which causes substances to come into contact with each other to cause a color reaction, which is releasable on the surface of a supporting substrate.