JP6901540B2 - Oral sheet - Google Patents

Description

The present invention relates to an oral sheet used by being attached to a tooth.

It is known that the deposit of dirt on the surface and inside of the enamel of a tooth causes the tooth to be colored or the entire tooth to be discolored. From the viewpoint of whitening the teeth and improving the appearance of the teeth, a sheet used by being attached to the teeth has been proposed. For example, Patent Document 1 describes a tooth whitening patch that includes a patch for upper teeth and a patch for lower teeth that have different shapes from each other, and these patches have a predetermined width and shape.

Patent Document 2 describes an adhesive composed of a plaster composition on a support having a three-layer structure composed of two spunlace non-woven fabrics and a polyethylene or polypropylene layer having a predetermined thickness interposed between the non-woven fabrics. A patch sheet for teeth or gums on which a layer is formed is described.

Patent Document 3 includes a backing layer having a first area and a second area that generate resistance to axial elongation, and an oral care composition disposed on the backing layer. A strip of material for delivery of an oral care active agent is described in which the backing layer contains a distortable reticulum and provides at least two levels of resistance during use.

Special Table 2006-509036 Japanese Unexamined Patent Publication No. 2010-168370 Special Table 2016-502415

The above-mentioned sheet is used by being attached to the surface of teeth at the time of use. However, during the sticking operation, it may not be possible to know which side the tooth sticking surface was on the sheet, or during the sticking operation, the tooth sticking surface may be touched more than necessary to reduce the effect of application to the teeth. The present inventors have found that there is a problem in the operability of the oral sheet in the above.

Therefore, an object of the present invention relates to providing an intraoral sheet capable of solving the above-mentioned problems of the prior art.

The present invention is an intraoral sheet comprising a tooth-attached sheet and a release sheet for covering a surface of the tooth-attached sheet to be attached to a tooth.
The tooth attachment sheet has a first direction along the dentition and a second direction orthogonal to the first direction, and extends from the main body portion to one of the main body portion and the first direction. It is preferable to have a portion.
It is preferable that the tooth attachment sheet is formed asymmetrically with respect to the center line of the tooth attachment sheet that bisects the total length in the first direction including the extension portion.

According to the present invention, an intraoral sheet having excellent operability during use is provided.

FIG. 1 is a plan view showing an embodiment of an intraoral sheet according to the present invention. FIG. 2 is a cross-sectional view taken along the first direction of the tooth attachment sheet shown in FIG. 3 (a) to 3 (c) are views for explaining how to use the intraoral sheet shown in FIG. 4 (a) to 4 (c) are plan views showing another embodiment of the tooth-attached sheet according to the present invention.

Hereinafter, the present invention will be described based on the preferred embodiment with reference to the drawings. 1 and 2 show an embodiment of the oral sheet of the present invention. The oral sheet 1 of the present embodiment includes a tooth attachment sheet 3 and a release sheet 2 that covers the attachment surface 41 attached to the teeth of the tooth attachment sheet 3. The oral sheet 1 is used by peeling the tooth attachment sheet 3 from the release sheet 2 and attaching the tooth attachment sheet 3 to the teeth. The usage will be described in detail later. In the intraoral sheet 1 of the present embodiment, the tooth attachment sheet 3 and the release sheet 2 are detachably laminated so that the attachment surface 41 of the tooth attachment sheet 3 and the release sheet 2 face each other before use. Has been done. The oral sheet 1 may have a tooth-attached sheet 3 having the same area as the release sheet 2 laminated on the release sheet 2 so as to be peelable, but has a larger area than the release sheet 2 on the release sheet 2. It is preferable that the tooth-sticking sheets 3 having a small size are laminated so as to be peelable.

The tooth sticking sheet 3 has a sticking surface 41 and a back surface 45 which is a surface opposite to the sticking surface 41 (see FIG. 2).

As shown in FIG. 2, the tooth attachment sheet 3 of the present embodiment has a laminated structure in which an action layer 42 forming the attachment surface 41 and a protective layer 44 forming the back surface 45 are laminated.
The working layer 42 preferably contains a functional component that acts on the teeth, gums, and gingiva. The functional component migrates to the tooth, gingiva, and gingiva in a state where the working layer 42 is in contact with the tooth, gingiva, and gingiva, and exhibits the action of the functional component. The working layer 42 may contain a functional component that may act on one or more sites selected from the group consisting of tooth enamel, dentin, gums, and gingiva. As the functional component, those exhibiting various actions such as whitening of teeth, suppression of hyperesthesia caused by cold substances, and prevention of caries and periodontal disease can be used without particular limitation. .. In the present embodiment, the functional component acting on the teeth is contained, but the functional component acting on the gums and gingiva may be contained.

In the present embodiment, the action layer 42 has solubility in saliva. With such a configuration, the transferability of the functional component from the working layer 42 to the tooth can be improved. From the viewpoint of improving the solubility, it is preferable that the working layer 42, that is, the portion forming the sticking surface 41 in the tooth sticking sheet 3 contains a water-soluble polymer.
Examples of the water-soluble polymer include polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl butyral, dextrin, polyethylene oxide, water-soluble nylon, and natural polysaccharides. Examples of natural polysaccharides include sodium alginate, trant gum, guar gum, xanthan gum, gum arabic, carrageenan, galactomannan, gelatin, casein, albumin, pullulan and the like.

From the viewpoint of improving the shape retention of the tooth sticking sheet 3 at the time of use, it is preferable that the tooth sticking sheet 3 has a protective layer 44 having a lower solubility than the working layer 42. With such a configuration, it is possible to prevent the tooth attachment sheet 3 from melting from the back surface 45 in a state where the tooth attachment sheet 3 is attached to the teeth, gums, and gingiva (hereinafter, also referred to as an attachment state). As a result, the transferability of the functional component to the teeth, gums, and gingiva is improved, and the discomfort caused by the dissolution of the tooth-attached sheet 3 in the attached state can be reduced. The high or low solubility is the solubility in saliva, but for convenience, it may be judged by the solubility in physiological saline.

From the viewpoint of desorbing the tooth attachment sheet 3 attached to the tooth as described later, the protective layer 44 preferably contains a polymer that is water-insoluble and has a hydrophilic group. Since such a polymer is water-insoluble, it exhibits hydrophobicity, and because it has a hydrophilic group, it has a property of being dispersible in water or a water-soluble solvent. Examples of the polymer include celluloses such as ethyl cellulose and hydroxypropyl cellulose, polyvinyl acetal, zein (main component of corn protein), acrylic resin such as mannan, casein, nylon and polymethacrylic acid resin, and oxazoline-modified silicone. Be done. These polymers may be used alone or in combination of two or more.
From the viewpoint of easily detaching the tooth-adhesive sheet 3 from the tooth surface after use, for example, a combination of pullulan for the working layer 42 and ethyl cellulose for the protective layer 44 is preferable.

Each of the working layer 42 and the protective layer 44 may contain various other additives in addition to the above-mentioned components. Examples of various other additives include neutralizing agents, plasticizers, surfactants, fragrances and the like.

The peeling sheet 2 is configured so that the tooth attachment sheet 3 can be peeled off. The material for forming the release sheet 2 is not particularly limited, and for example, polyfatty acid ester, polycarbonate, polypropylene, polyethylene, polyester, polyamide, polyamideimide, polyetheretherketone, polyetherimide, polystyrene, polyethylene terephthalate, polyvinyl chloride, nylon resin. , Acrylic resin and other resins, and one of these can be used alone or in combination of two or more.

The oral sheet 1 of the present embodiment includes an upper tooth sheet A which is used as a tooth attachment sheet 3 by being attached to an upper tooth and a lower tooth sheet B which is used by being attached to a lower tooth. have. Hereinafter, unless otherwise specified, the description of the tooth attachment sheet 3 applies to the upper tooth sheet A and the lower tooth sheet B, respectively.

The tooth attachment sheet 3 has a first direction X along the dentition and a second direction Y orthogonal to the first direction X in the attached state. The tooth attachment sheet 3 of the present embodiment has a long shape in the first direction X. The upper tooth sheet A and the lower tooth sheet B of the present embodiment may have different lengths in the first direction X.
The tooth attachment sheet 3 has a main body portion 30 and an extension portion 36 extending from the main body portion 30 in one of the first directions X. The main body portion 30 is a main portion attached to the surface of the tooth. The extension portion 36 is a portion in which the length in the second direction Y is shorter than that of the main body portion 30.

As in the present embodiment, the upper tooth sheet A and the lower tooth sheet B are arranged so that the positions of the main body center line CL2 that bisects the total length of the main body 30 in the first direction X coincide with each other. , It is preferable that they are arranged on the same release sheet 2. The upper tooth sheet A and the lower tooth sheet B may be detachably laminated on the same release sheet 2 as in the present embodiment, or may be detachably laminated on the connected release sheets. It may be laminated so that it can be peeled off by a separate release sheet.

In the present embodiment, the tooth attachment sheet 3 has a first region F to be attached to the front side of the tooth and a second region R to be folded back and attached to the back side of the tooth. In the tooth attachment sheet 3 of the present embodiment, when the first region F is attached to the front side of the tooth and the second region R is folded back at the folding line WL described later, the second region R becomes the tooth. It is affixed to the back side.

The main body portion 30 of the present embodiment may be formed symmetrically with respect to the main body portion center line CL2 that bisects the total length of the main body portion 30 in the first direction X. As in the present embodiment, the upper tooth sheet A and the lower tooth sheet B are centered on the tooth attachment sheet that divides the total length of the first direction X of the tooth attachment sheet 3 including the extension portion 36 into two equal parts. The lines CL1 may be arranged on the same release sheet 2 so that the positions of the lines CL1 coincide with each other.

The tooth attachment sheet 3 is formed asymmetrically with respect to the tooth attachment sheet center line CL1. The oral sheet 1 provided with such a tooth-attaching sheet 3 is excellent in operability at the time of use, and can be easily applied to the surface of teeth. That is, since it is possible to prevent the tooth sticking surface from being known during the sticking operation, it can be accurately applied to the tooth surface. The operability of the intraoral sheet 1 will be described with reference to FIG.

In the method of using the oral sheet 1, first, an operation of peeling the tooth attachment sheet 3 from the release sheet 2 is performed. Since the tooth attachment sheet 3 is formed asymmetrically as described above, the left and right sides and the front and back sides of the oral sheet 1 can be easily distinguished. In addition, the user can intuitively pick the extension portion 36 and easily peel the tooth-attached sheet 3 from the release sheet 2 [see FIG. 3 (a)]. Then, with the extension portion 36 picked up, the tooth attachment sheet 3 can be attached to the surface of the tooth as it is, and the operation of attaching the sheet 3 to the tooth can be easily performed [FIG. 3 (b)). reference〕. In this way, by providing the extending portion 36 as the main portion that comes into contact with the user's fingers or the like, the contact between the working layer 42 of the main body portion 30 and the user's fingers or the like during the peeling operation or the sticking operation is performed. It is suppressed as much as possible, and the functional component in the working layer 42 of the main body 30 can be stably maintained. That is, it is possible to effectively suppress the reduction of the action of the functional component on the working layer 42 of the main body 30. In particular, when the working layer 42 contains a water-soluble polymer, when the tooth attachment sheet 3 is peeled from the release sheet 2, the tooth attachment sheet 3 is dissolved by the water of the fingers and the functional component is reduced. The present inventor has found that there is a risk. Further, by having the extending portion 36, it is possible to prevent the sticking surface from being lost during the sticking operation of the tooth sticking sheet 3, so that the tooth sticking sheet 3 can be accurately applied to the surface of the tooth.
Next, in the tooth attachment sheet 3, the first region F is attached to the front side of the tooth along the dentition. At this time, the extending portion 36 is also attached to the surface of the tooth. Next, the second region R of the tooth attachment sheet 3 is folded back to the back side of the tooth [see FIG. 3C], and the second region R is attached to the back side of the tooth along the dentition to attach the tooth attachment sheet. 3 is attached. After maintaining this sticking state for a predetermined time, the tooth sticking sheet 3 is brushed together with a toothbrush or the like to disintegrate the tooth sticking sheet 3, and then rinsed with water to remove the tooth sticking sheet 3 from the teeth. Let me.

On the other hand, in the conventional oral sheet which is symmetrical with respect to the center line of the tooth-attached sheet and has no extending portion, it is unclear where the user should pick when peeling from the release sheet 2. Is. In addition, the part where the tooth sticking sheet is picked must be changed between the peeling operation and the sticking operation, and the operation tends to be complicated because the tooth sticking sheet must be picked again. Further, by re-picking, the tooth sticking sheets may stick to each other, or the sheets may stick to the user's fingers. By sticking to the surface other than the surface of the tooth, the functional component in the working layer 42 may be reduced, and the action of the functional component may be reduced. Further, if the tooth sticking sheet is symmetrical with respect to its center line, it may not be possible to know which side the sticking surface was during the sticking operation.

From the viewpoint of further improving the operability of the operation of peeling the tooth attachment sheet 3 from the release sheet 2 and the operation of attaching the tooth attachment sheet 3 to the teeth, the dimensions of the tooth attachment sheet 3 are within the following ranges. It is preferable to have.
The length L1 of the extending portion 36 in the first direction X (see FIG. 1) is preferably 3% or more, more preferably 3% or more, based on the total length L (see FIG. 1) of the tooth attachment sheet 3 in the first direction X. 10% or more, more preferably 15% or more, preferably 30% or less, more preferably 25% or less, still more preferably 20% or less, and preferably 3% or more and 30% or less, more preferably 10 % Or more and 25% or less, more preferably 15% or more and 20% or less.
The length L1 (see FIG. 1) of the extending portion 36 in the first direction X is preferably 2.8 mm or more, more preferably 5.6 mm or more, still more preferably 8.4 mm or more, and preferably 20. 4 mm or less, more preferably 17 mm or less, still more preferably 13.6 mm or less, and preferably 2.8 mm or more and 13.6 mm or less, more preferably 5.6 mm or more and 17 mm or less, still more preferably 8.4 mm or more and 13. It is 6 mm or less.
The total length L (see FIG. 1) of the tooth attachment sheet 3 in the first direction X is preferably 22 mm or more, more preferably 38 mm or more, further preferably 55 mm or more, and preferably 112 mm or less, more preferably 91 mm or less. It is more preferably 70 mm or less, preferably 22 mm or more and 112 mm or less, more preferably 38 mm or more and 91 mm or less, and further preferably 55 mm or more and 70 mm or less.

The width W1 (see FIG. 1) of the extending portion 36 is preferably 20% or more, more preferably 30% or more, still more preferably 40% or more with respect to the total width W (see FIG. 1) of the tooth attachment sheet 3. Yes, and more preferably 70% or less, more preferably 60% or less, still more preferably 50% or less, and preferably 20% or more and 70% or less, more preferably 30% or more and 60% or less, still more preferably 40%. More than 50% or less. The width of the extending portion 36 and the total width W of the tooth attachment sheet 3 are the maximum lengths in these second directions Y.

The total length L (see FIG. 1) of the tooth attachment sheet 3 in the first direction X is preferably 120% or more, more preferably 190% or more, and further, with respect to the total width W (see FIG. 1) of the tooth attachment sheet 3. It is preferably 250% or more, preferably 1000% or less, more preferably 650% or less, still more preferably 310% or less, and preferably 120% or more and 1000% or less, more preferably 190% or more and 650% or less. , More preferably 250% or more and 310% or less.

The width W1 (see FIG. 1) of the extending portion 36 is preferably 4.4 mm or more, more preferably 6.6 mm or more, further preferably 8.8 mm or more, and preferably 15.4 mm or less, more preferably. It is 13.2 mm or less, more preferably 11 mm or less, preferably 4.4 mm or more and 15.4 mm or less, more preferably 6.6 mm or more and 13.2 mm or less, still more preferably 8.8 mm or more and 11 mm or less.
The total width W (see FIG. 1) of the tooth attachment sheet 3 is preferably 13 mm or more, more preferably 16 mm or more, still more preferably 20 mm or more, and preferably 35 mm or less, more preferably 32 mm or less, still more preferably 29 mm. It is preferably 13 mm or more and 35 mm or less, more preferably 16 mm or more and 32 mm or less, and further preferably 20 mm or more and 29 mm or less.

It is desirable that the main body 30 of the present embodiment has a long shape in the first direction X.
The length L2 (see FIG. 1) of the main body 30 in the first direction X is preferably 110% or more, more preferably 150% or more, still more preferably 150% or more, based on the total width W of the tooth attachment sheet 3 in the second direction Y. Is 200% or more, preferably 900% or less, more preferably 600% or less, still more preferably 260% or less, and preferably 110% or more and 900% or less, more preferably 150% or more and 600% or less. More preferably, it is 200% or more and 260% or less.
The length L2 (see FIG. 1) of the main body 30 in the first direction X is preferably 20 mm or more, more preferably 30 mm or more, further preferably 40 mm or more, and preferably 100 mm or less, more preferably 80 mm or less. It is more preferably 60 mm or less, preferably 20 mm or more and 100 mm or less, more preferably 30 mm or more and 80 mm or less, and further preferably 40 mm or more and 60 mm or less.

From the viewpoint of further improving the operability and the visibility of the extending portion 36, it is preferable that the extending portion 36 is unevenly arranged in one of the second directions Y in the main body portion 30. With such a configuration, the visibility of the extending portion 36 in the tooth attachment sheet 3 is improved, and when the tooth attachment sheet 3 has the first region F and the second region R, the first region F is attached. The operation and the operation of folding back the second region R can be facilitated.
The extending portion 36 may be formed in the first region F or the second region R, but the first extending portion 36 may be formed in the second region R from the viewpoint of facilitating the operation of folding back the second region R. It is preferably formed in the region F, and more preferably formed on one end side of the first direction X in the first region F.

The tooth attachment sheet 3 of the present embodiment has an extension portion 36 on only one side of the first direction X in the main body portion 30, whereas the tooth attachment sheet 3 has the first direction X in the main body portion 30. It may have extension portions 36 on both sides of the. In order to make the tooth attachment sheet 3 asymmetrical, when the tooth attachment sheet 3 has extension portions 36 on both sides of the first direction X in the main body portion 30, these two extension portions have the extension length and shape thereof. Are not the same. However, from the viewpoint of improving the visibility of the extending portion 36 and facilitating intuitive operation, the tooth attachment sheet 3 does not have the extending portion 36 extending to the other side of the first direction X. Is more preferable.

In the intraoral sheet 1 in FIG. 1, the upper tooth sheet A is arranged so that the first region F is located on the upper side and the second region is located on the lower side, and the lower tooth sheet B is arranged in the first region. It is shown in a state where F is located on the lower side and the second region is located on the upper side. Such an arrangement state corresponds to the arrangement relationship between the upper tooth sheet A and the lower tooth sheet B in the oral cavity, and is preferable in that intuitive operation is facilitated.

In the tooth sheet A above the present embodiment, the extending portion 36 is located on the left side of the first region F when viewed from the tooth attachment sheet 3 side in the above-mentioned arrangement state. When the main body portion 30 has extension portions 36 on both sides of the first direction X, the longer one of the two extension portions 36 in the first direction X or the larger area is the first. It is preferably located on the left side of 1 region F.
In the tooth sheet B under the present embodiment, the extending portion 36 is located on the left side of the first region F when viewed from the tooth attachment sheet 3 side in the above-mentioned arrangement state. When the main body portion 30 has extension portions 36 on both sides of the first direction X, the longer one of the two extension portions 36 in the first direction X or the larger area is the first. It is preferably located on the left side of 1 region F.
As described above, the first region is the arrangement in which the extension portion 36 is located on the left side, or the longer or larger area of the extension portions 36 on both sides of the main body portion 30 in the first direction X. The arrangement located on the left side of F is preferable from the viewpoint of operability when used by a right-handed user. Specifically, when the extension portion 36 is picked with the right hand and the tooth attachment sheet 3 is peeled off, the attachment surface 41 is turned upside down to facilitate the operation of attaching the attachment surface 41 to the front side of the tooth. Can be done.

When used by a left-handed user, the upper tooth sheet A and the lower tooth sheet are used from the viewpoint of turning over the sticking surface 41 to the front side and facilitating the operation of sticking the sticking surface 41 to the front side of the tooth. B preferably has the following arrangement.
The extension portion 36 of the upper tooth sheet A is located on the right side of the first region F when viewed from the tooth attachment sheet 3 side in the above-mentioned arrangement state. When the main body portion 30 has extension portions 36 on both sides of the first direction X, the longer one of the two extension portions 36 or the larger area of the first direction X is the first. It is located on the right side of the area F.
In the lower tooth sheet B, the extension portion 36 is located on the right side of the first region F when viewed from the tooth attachment sheet 3 side in the above-mentioned arrangement state. When the main body portion 30 has extension portions 36 on both sides of the first direction X, the longer one of the two extension portions 36 or the larger area of the first direction X is the first. It is located on the right side of the area F.
Therefore, from the viewpoint of further improving the operability, the upper tooth sheet A and the lower tooth sheet B are releasably laminated on the same or connected release sheet 2 with the first directions aligned. It is preferable that the extending portions 36 are arranged on the same side of the first direction X in the upper tooth sheet A and the lower tooth sheet B. In other words, it is preferable that the extending portion 36 protrudes in the same direction in the upper tooth sheet A and the lower tooth sheet B. Alternatively, when extending portions 36 are provided on both sides of the first direction X in the main body portion 30, both the upper tooth sheet A and the lower tooth sheet B project to both sides of the main body portion 30. Of the extending portions 36, the one having a longer length or a larger area in the first direction X is preferably arranged on the same side of the first direction X.

As described above, the tooth attachment sheet 3 of the present embodiment may have a first region F and a second region R. The tooth attachment sheet 3 of the present embodiment has a constricted portion 31 composed of a pair of recesses recessed inward in the first direction X at both ends of the main body portion 30 in the first direction X. It is preferable that this is a folding guide portion that folds back the second region R. Specifically, when the first region F is attached to the front side of the tooth and the second region R is folded back at the folding line WL passing through the center of the constricted portion 31 in the second direction Y, the second region R is folded back. R is attached to the back side of the tooth. The folding line WL may be a virtual line, or may be formed by a perforation or the like that can induce folding.
When the tooth attachment sheet 3 has the first region F and the second region R, the tooth attachment sheet 3 has both ends of the first direction X in the main body portion 30 from the viewpoint of easily folding back the second region R. It is preferable that the portion has a folding guide portion that folds the second region R along the first direction X. In the present embodiment, the folding guide portion is the above-mentioned constricted portion 31. The concave portion forming the constricted portion 31 can have an arbitrary shape such as a U-shape, a semicircular shape, a polygonal shape such as a triangle, or the like. Further, the folding guide portion may be a pair of notches formed at both ends of the first direction X in the main body 30, and may be formed at either end of the first direction X in the main body 30. It may be a recess or a notch.

Further, from the viewpoint of dividing the second region R into a plurality of regions to improve the ease of folding back, the second region R is a division that divides the second region R into a plurality of regions along the first direction X. It is preferable to have one or more portions. In the present embodiment, the divided portion may be a recess 32 formed in the center of the first direction X in the second region R. The concave portion 32, which is the divided portion, may have an arbitrary shape such as a U-shape, a semicircular shape, a polygonal shape such as a triangle, or the like. Further, the divided portion may be a notch portion over the entire length of the second region R in the second direction Y. The divided portion is preferably formed over the entire length of the second region R in the second direction Y. The total length of the second region Y in the second direction Y is the distance from the outer edge of the second region R in the second direction Y on the outer side of the second direction Y to the folding line WL. The second region R can have one or more divided portions at arbitrary positions in the first direction X. When the second region R has one divided portion, the divided portion is preferably formed in the center of the first direction X in the second region R of the main body portion 30 from the same viewpoint as described above.

The tooth-attached sheet 3 may have different lengths in the first direction X of each of the upper tooth sheet A and the lower tooth sheet B. Since the upper teeth are more easily exposed to the line of sight from others than the lower teeth, it is preferable that the range for beautifying the teeth such as whitening is set wider than that of the lower teeth. From such a viewpoint, the first direction X total length of the upper tooth sheet A is preferably 1.05 times or more, more preferably 1.1 times or more, with respect to the first direction X total length of the lower tooth sheet B. More preferably 1.15 times or more, still more preferably 10 times or less, more preferably 5 times or less, still more preferably 1.25 times or less, and preferably 1.05 times or more and 10 times or less. It is preferably 1.1 times or more and 5 times or less, and more preferably 1.15 times or more and 1.25 times or less. The total length of each of the upper tooth sheet A and the lower tooth sheet B in the first direction X is the maximum length of each of the sheets A and B in the first direction X.

The tooth attachment sheet of the present embodiment preferably has a recess on the surface of the surface to be attached to the tooth. This concave portion is, for example, a concave portion 43 corresponding to the convex portion 21 formed on the release sheet 2, and remains on the surface of the attachment surface 41 of the tooth attachment sheet 3 when the release sheet 2 is peeled off. It's okay. Thereby, with respect to the tooth attachment sheet 3 after being peeled from the release sheet 2, the attachment surface 41 and the back surface 45 can be identified by the recess 43. The convex portion 21 of the release sheet 2 may be uneven due to embossing applied to the surface of the release sheet 2.
From the viewpoint of further improving the distinguishability between the sticking surface 41 and the back surface 45, the depth of the recess 43 formed in the sticking surface 41 is preferably 8 μm or more, more preferably 11 μm or more, still more preferably 15 μm or more. Further, it is preferably 53 μm or less, more preferably 46 μm or less, further preferably 40 μm or less, and preferably 8 μm or more and 53 μm or less, more preferably 11 μm or more and 46 μm or less, still more preferably 15 μm or more and 40 μm or less. The depth of the recess 43 can be measured by the same method as <Measuring method of the thickness of the tooth attachment sheet 3> described later.

From the viewpoint of improving the adhesion of the tooth attachment sheet 3 to irregularities such as the tooth surface and the interdental space, the thickness of the tooth attachment sheet 3 is preferably 35 μm or more, more preferably 50 μm or more, still more preferably 60 μm or more. It is preferably 500 μm or less, more preferably 150 μm or less, still more preferably 70 μm or less, and preferably 35 μm or more and 500 μm or less, more preferably 50 μm or more and 150 μm or less, still more preferably 60 μm or more and 70 μm or less. The thickness of the tooth attachment sheet 3 can be measured by the following method.

<Measuring method of thickness of tooth sticking sheet 3>
The thickness of the tooth attachment sheet 3 can be measured using a digital microscope (for example, VHX-1000 manufactured by KEYENCE). The cut surface of the tooth-attached sheet 3 is observed with no load at a magnification of 20 to 100 times using the digital microscope, and the maximum thickness of the cut surface is measured. The measurement is performed on each cross section obtained by cutting the tooth sticking sheet 3 at arbitrary three places, and the average value of the maximum thicknesses at these three places is taken as the thickness of the tooth sticking sheet 3.

From the viewpoint of improving the operability of attaching the tooth attachment sheet 3 to the teeth, the strain of the tooth attachment sheet 3 at a tensile strength of 20 MPa is preferably 2% or more, more preferably 3% or more, and further. It is preferably 4% or more, and even more preferably 5% or more. The strain of the tooth-attached sheet 3 at a tensile strength of 20 MPa can be measured by the following method.

<Strain measurement method>
The strain of the tooth-attached sheet is measured with a rheometer (manufactured by AntonioPaar, MCR502) with a tensile strength of 20 MPa. Set the sheet to be measured on the jig for measuring strain and measure the strain. The analysis software uses Rheoplus32. A universal extension measurement system (UXF12 / UNI) is used as the measuring jig. The tensile strain when the tensile stress is changed from 1 to 20 MPa in a room temperature environment (about 25 ° C.) is measured. The measurement time is 30 seconds, and the tensile stress is linearly controlled at 1 point / 1 second. The tensile strain indicates the amount of change from the initial length of about 20 mm of the sheet sandwiched between the rotary drum and the fixed drum in%.

The haze value (cloudiness) of the tooth attachment sheet 3 is preferably 80 or less, more preferably 70 or less, and further, from the viewpoint of easily attaching the tooth attachment sheet 3 according to the unevenness of the tooth surface and the teeth. It is preferably 60 or less, and even more preferably 50 or less. The haze value is measured by the following method.

<Measurement method of haze value (cloudiness)>
Measure the haze value (cloudiness) in accordance with the Japanese Industrial Standards plastic product test method (JIS K 7136). The haze value is measured using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., trade name "NDH7000II"). From the measurement results of any three points on the sample, the average value is used as the haze value.

From the viewpoint of facilitating the operation of peeling the tooth sticking sheet 3 from the peeling sheet 2, it is preferable that the tooth sticking sheet 3 and the peeling sheet 2 have different colors.

As described above, the tooth attachment sheet 3 is composed of a water-soluble polymer. From the viewpoint of suppressing moisture absorption of the tooth-attached sheet 3 before use, it is preferable that the oral sheet 1 is individually wrapped with a packaging material. From the same viewpoint as above, it is preferable that the packaging material has a hermetically sealed inside. Such a packaging material is formed by joining one or more sheets by using a known joining method such as ultrasonic sealing, heat sealing, and high frequency sealing. Examples of the material for forming the packaging material include a thermoplastic resin film and a film laminated with a metal thin film such as aluminum.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the oral sheet 1 of the above-described embodiment has a laminated structure in which the tooth attachment sheet 3 is laminated with the action layer 42 and the protective layer 44, but the tooth attachment sheet 3 is formed only from the action layer 42. It may be the one having an additional intermediate layer between the working layer 42 and the protective layer 44.
Further, although the main body portion 30 of the above-described embodiment has a long shape in the first direction X, it does not have to have a long shape in one direction. For example, the main body portion 30 may have a length in the second direction Y corresponding to a length in the tooth height direction or a short length. Further, the main body portion 30 may be substantially square [see FIG. 4 (a)].
Further, the tooth attachment sheet 3 of the above-described embodiment has the first region F and the second region R, but the tooth attachment sheet 3 has only the first region F or the second region R. It may be a thing. For example, the tooth-attached sheet 3 has a main body 30 composed of a portion corresponding to the first region F and one of the first directions X of the main body 30 and the center or one side of the main body 30 in the second direction Y. It may be in the form of having the extension portions 36 which are unevenly arranged in the direction [see FIGS. 4 (b) and 4 (c)].
Further, the oral sheet 1 of the above-described embodiment has an upper tooth sheet A and a lower tooth sheet B, whereas the oral sheet 1 has an upper tooth sheet A or a lower tooth. It may have only the sheet B for use.

<1>
An intraoral sheet comprising a tooth attachment sheet and a release sheet covering the surface of the tooth attachment sheet to be attached to the teeth.
The tooth attachment sheet has a first direction along the dentition and a second direction orthogonal to the first direction, and extends from the main body portion to one of the main body portion and the first direction. Has a part and
The tooth-attached sheet is an intraoral sheet formed asymmetrically with respect to the center line of the tooth-attached sheet that bisects the total length in the first direction including the extending portion.

<2>
The intraoral sheet according to <1>, wherein the tooth-attached sheet has a long shape in the first direction.
<3>
The total length L of the tooth-attached sheet in the first direction is 120% or more, preferably 190% or more, more preferably 250% or more, and preferably 1000% or less, preferably 1000% or less, based on the total width W of the tooth-attached sheet. Is 650% or less, more preferably 310% or less, and 120% or more and 1000% or less, preferably 190% or more and 650% or less, more preferably 250% or more and 310% or less, according to the above <2>. Oral sheet.
<4>
The length L1 of the extending portion in the first direction is 3% or more, preferably 10% or more, more preferably 15% or more, and 30% or more with respect to the total length L of the tooth attachment sheet in the first direction. % Or less, preferably 25% or less, more preferably 20% or less, and 3% or more and 30% or less, preferably 10% or more and 25% or less, more preferably 15% or more and 20% or less. > The intraoral sheet according to any one of <3>.
<5>
The length L1 of the extending portion in the first direction is 2.8 mm or more, preferably 5.6 mm or more, more preferably 8.4 mm or more, and 20.4 mm or less, preferably 17 mm or less, more preferably. The oral sheet according to <4> above, which is 13.6 mm or less, and is 2.8 mm or more and 13.6 mm or less, preferably 5.6 mm or more and 17 mm or less, more preferably 8.4 mm or more and 13.6 mm or less. ..
<6>
The total length L of the tooth attachment sheet in the first direction is 22 mm or more, preferably 38 mm or more, more preferably 55 mm or more, and 112 mm or less, preferably 91 mm or less, more preferably 70 mm or less, and 22 mm or more. The oral sheet according to <4> or <5> above, which is 112 mm or less, preferably 38 mm or more and 91 mm or less, and more preferably 55 mm or more and 70 mm or less.
<7>
The above-mentioned <1> to <6>, wherein the main body portion is formed symmetrically with respect to the center line of the main body portion that divides the total length of the main body portion into two equal parts in the first direction. Oral sheet.
<8>
The intraoral sheet according to any one of <1> to <7>, wherein the main body has a long shape in the first direction.
<9>
The length L2 of the main body in the first direction is 110% or more, preferably 150% or more, more preferably 200% or more, and 900% with respect to the total width W of the tooth attachment sheet in the second direction. Hereinafter, it is preferably 600% or less, more preferably 260% or less, and 110% or more and 900% or less, preferably 150% or more and 600% or less, more preferably 200% or more and 260% or less. Oral sheet described in.
<10>
The length L2 of the main body in the first direction is 20 mm or more, preferably 30 mm or more, more preferably 40 mm or more, and 100 mm or less, preferably 80 mm or less, more preferably 60 mm or less, and 20 mm or more and 100 mm. The intraoral sheet according to <8> or <9>, wherein the sheet is preferably 30 mm or more and 80 mm or less, more preferably 40 mm or more and 60 mm or less.

<11>
The intraoral sheet according to any one of <1> to <10>, wherein the extending portion is unevenly arranged in one of the second directions in the main body portion.
<12>
The width W1 of the extending portion is 20% or more, preferably 30% or more, more preferably 40% or more, and 70% or less, preferably 60% or less, based on the total width W of the tooth attachment sheet. The oral sheet according to <11>, which is more preferably 50% or less, 20% or more and 70% or less, preferably 30% or more and 60% or less, and more preferably 40% or more and 50% or less.
<13>
The width W1 of the extending portion is 4.4 mm or more, preferably 6.6 mm or more, more preferably 8.8 mm or more, and 15.4 mm or less, preferably 13.2 mm or less, more preferably 11 mm or less. The oral sheet according to <12> above, which is 4.4 mm or more and 15.4 mm or less, preferably 6.6 mm or more and 13.2 mm or less, and more preferably 8.8 mm or more and 11 mm or less.
<14>
The total width W of the tooth attachment sheet is 13 mm or more, preferably 16 mm or more, more preferably 20 mm or more, and 35 mm or less, preferably 32 mm or less, more preferably 29 mm or less, and 13 mm or more and 35 mm or less, preferably. The intraoral sheet according to <12> or <13>, wherein is 16 mm or more and 32 mm or less, more preferably 20 mm or more and 29 mm or less.
<15>
The intraoral sheet according to any one of <1> to <14>, which has the extending portions on both sides of the main body portion in the first direction.
<16>
The intraoral sheet according to any one of <1> to <14>, wherein the tooth-attached sheet does not have an extending portion extending to the other side in the first direction.
<17>
The tooth attachment sheet has a first area to be attached to the front side of the tooth and a second area to be folded back and attached to the back side of the tooth.
The intraoral sheet according to any one of <1> to <16>, wherein the extending portion is formed in the first region.
<18>
The tooth-attached sheet has a fold-back guide portion that folds back the second region, and the fold-back guide portion comprises a recess or a notch formed in either end of both ends in the first direction of the main body portion. , The intraoral sheet according to <17>.
<19>
The tooth-attached sheet has, as the folding guide portion, a constricted portion composed of a pair of recesses recessed inward in the first direction at both ends of the main body portion in the first direction. The intraoral sheet according to <18>, wherein the concave portion forming the constricted portion has a U-shape, a semicircular shape, or a polygonal shape.
<20>
The tooth sticking sheet has one or a plurality of divided portions for dividing the second region into a plurality of regions along the first direction, according to any one of <17> to <19>. Oral sheet.

<21>
The intraoral sheet according to <20>, wherein the divided portion is a notch portion over the entire length in the second direction of the second region.
<22>
The intraoral sheet according to <20> or <21>, wherein the divided portion is formed in the center of the second region in the first direction.
<23>
The oral cavity according to <20>, wherein the divided portion is a concave portion formed in the center of the first direction in the second region, and the shape thereof is U-shaped, semicircular, or polygonal. Inner sheet.
<24>
The tooth attachment sheet is an upper tooth sheet used by being attached to an upper tooth.
When the tooth-attached sheet is arranged so that the first region is located on the upper side and the second region is located on the lower side, and the tooth-attached sheet is viewed from the front, the extending portion is the first region. The intraoral sheet according to any one of <17> to <23>, which is located on the left side of the above.
<25>
The tooth attachment sheet is a lower tooth sheet used by being attached to the lower tooth.
When the tooth-attached sheet is arranged so that the first region is located on the lower side and the second region is located on the upper side, and the tooth-attached sheet is viewed from the front, the extending portion is the first region. The intraoral sheet according to any one of <17> to <23>, which is located on the left side of the above.
<26>
As the tooth attachment sheet, the upper tooth sheet used by attaching to the upper tooth and the lower tooth sheet used by attaching to the lower tooth are the same or connected with the first direction aligned. It is affixed to the peeling sheet that has been attached,
The oral sheet according to any one of <1> to <25>, wherein the extending portion is arranged on the same side in the first direction between the upper tooth sheet and the lower tooth sheet. ..
<27>
The intraoral sheet according to <26>, wherein the tooth-attached sheet has different lengths in the first direction of the upper tooth sheet and the lower tooth sheet.
<28>
The total length of the upper tooth sheet in the first direction is 1.05 times or more, preferably 1.1 times or more, more preferably 1.15 times or more the total length of the lower tooth sheet in the first direction. Yes, 10 times or less, preferably 5 times or less, more preferably 1.25 times or less, and 1.05 times or more and 10 times or less, preferably 1.1 times or more and 5 times or less, more preferably 1. The intraoral sheet according to <27>, which is 15 times or more and 1.25 times or less.
<29>
The oral sheet according to any one of <1> to <28>, wherein the tooth attachment sheet forms a surface to be attached to the tooth and includes an action layer containing a functional component acting on the tooth. ..
<30>
The oral sheet according to <29>, wherein the working layer is soluble in saliva.

<31>
The oral sheet according to <30>, wherein the working layer contains a water-soluble polymer.
<32>
The oral cavity according to <31>, wherein the water-soluble polymer is one or more selected from polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl butyral, dextrin, polyethylene oxide, water-soluble nylon, and natural polysaccharides. Sheet.
<33>
The natural polysaccharide is one or more selected from sodium alginate, trant gum, guar gum, xanthan gum, arabic gum, carrageenan, galactomannan, gelatin, casein, albumin, and pullulan, according to <32>. Oral sheet.
<34>
4. The one according to any one of <29> to <33>, wherein the tooth-attached sheet has a laminated structure in which the working layer and a protective layer having a lower solubility than the working layer are laminated. Oral sheet.
<35>
The oral sheet according to <34>, wherein the protective layer contains a polymer that is water-insoluble and has a hydrophilic group.
<36>
The polymer is one or more selected from celluloses, polyvinyl acetals, zeins (main components of corn proteins), mannan, casein, nylon, acrylic resins, and oxazoline-modified silicones.
The celluloses contain one or both of ethyl cellulose and hydroxypropyl cellulose.
The intraoral sheet according to <35>, wherein the acrylic resin contains a polymethacrylic acid resin.
<37>
The oral sheet according to any one of <34> to <36>, wherein the tooth-adhesive sheet is composed of a combination of pullulan as an action layer and ethyl cellulose as a protective layer.
<38>
The intraoral sheet according to any one of <1> to <37>, wherein the tooth-attached sheet has a recess on the surface of the surface of the tooth-attached sheet to be attached to the teeth.
<39>
The release sheet has a convex portion corresponding to the unevenness formed by the embossing applied to the surface thereof.
The intraoral sheet according to <38>, wherein the concave portion corresponds to the convex portion and remains on the surface of the sticking surface of the tooth sticking sheet when the peeling sheet is peeled off.
<40>
The material for forming the release sheet is from polyfatty acid ester, polycarbonate, polypropylene, polyethylene, polyester, polyamide, polyamideimide, polyetheretherketone, polyetherimide, polystyrene, polyethylene terephthalate, polyvinyl chloride, nylon resin, and acrylic resin. The intraoral sheet according to any one of <1> to <39>, which is one or more selected.

<41>
The thickness of the tooth attachment sheet is 35 μm or more, preferably 50 μm or more, more preferably 60 μm or more, and 500 μm or less, preferably 150 μm or less, more preferably 70 μm or less, and 35 μm or more and 500 μm or less, preferably 35 μm or more. The oral sheet according to any one of <1> to <40>, which is 50 μm or more and 150 μm or less, more preferably 60 μm or more and 70 μm or less.
<42>
The tooth-attached sheet has a strain of 2% or more, preferably 3% or more, more preferably 4% or more, still more preferably 5% or more when the tensile strength is 20 MPa. The intraoral sheet according to any one of <41>.
<43>
The haze value (cloudiness) of the tooth-attached sheet is 80 or less, preferably 70 or less, more preferably 60 or less, still more preferably 50 or less, any one of <1> to <42>. The described oral sheet.
<44>
The oral sheet according to any one of <1> to <43>, which is individually wrapped with a packaging material.
<45>
The intraoral sheet according to <44>, wherein the packaging material has a hermetically sealed inside.
<46>
The oral sheet according to <44> or <45>, wherein the packaging material is formed by joining one or more sheets by using an ultrasonic seal, a heat seal, or a high frequency seal. ..

1 Oral sheet 2 Peeling sheet 3 Tooth attachment sheet 30 Main body 36 Main body 36 Extension A Upper tooth sheet B Lower tooth sheet CL1 Tooth attachment sheet Center line CL2 Main body center line F 1st area R 2nd Region X 1st direction Y 2nd direction

Claims (10)

An intraoral sheet comprising a tooth attachment sheet and a release sheet covering the surface of the tooth attachment sheet to be attached to the teeth.
The tooth attachment sheet has a first direction along the dentition and a second direction orthogonal to the first direction, and extends from the main body portion to one of the main body portion and the first direction. Has a part and
The tooth attachment sheet is formed asymmetrically with respect to the center line of the tooth attachment sheet that bisects the total length in the first direction including the extension portion .
When the length along the second direction is expressed as the width, the width of the extending portion is 20% or more and 70% or less with respect to the total width of the tooth attachment sheet.
The length of the extension portion in the first direction is 2.8 mm or more, and the extension portion has a length of 2.8 mm or more.
An intraoral sheet in which the tooth-attached sheet having a smaller area than the release sheet is releasably laminated on the release sheet. It said body portion is formed symmetrically to the entire length of the body portion in the first direction with respect to the body center line bisecting, intraoral sheet according to claim 1. The intraoral sheet according to claim 1 or 2 , wherein the extending portion is unevenly arranged in one of the second directions in the main body portion. The oral sheet according to any one of claims 1 to 3 , wherein the tooth-attached sheet does not have an extending portion extending to the other side in the first direction. The tooth attachment sheet has a first area to be attached to the front side of the tooth and a second area to be folded back and attached to the back side of the tooth.
The intraoral sheet according to any one of claims 1 to 4 , wherein the extending portion is formed in the first region. The tooth attachment sheet is an upper tooth sheet used by being attached to an upper tooth.
When the tooth-attached sheet is arranged so that the first region is located on the upper side and the second region is located on the lower side, and the tooth-attached sheet is viewed from the front, the extending portion is the first region. The intraoral sheet according to claim 5 , which is located on the left side of the. The tooth attachment sheet is a lower tooth sheet used by being attached to the lower tooth.
When the tooth-attached sheet is arranged so that the first region is located on the lower side and the second region is located on the upper side, and the tooth-attached sheet is viewed from the front, the extending portion is the first region. The intraoral sheet according to claim 5 , which is located on the left side of the. As the tooth attachment sheet, the upper tooth sheet used by attaching to the upper tooth and the lower tooth sheet used by attaching to the lower tooth are the same or connected with the first direction aligned. It is attached to the release sheets,
The intraoral sheet according to any one of claims 1 to 7 , wherein the extending portion of the upper tooth sheet and the lower tooth sheet are arranged on the same side in the first direction. The oral sheet according to any one of claims 1 to 8 , wherein the tooth attachment sheet forms a surface to be attached to the tooth and includes an action layer containing a functional component acting on the tooth. The intraoral sheet according to any one of claims 1 to 9 , wherein the tooth-attached sheet has a recess on the surface of the surface of the tooth-attached sheet to be attached to the teeth.

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