Dental demonstration kit

Abstract

To provide a demonstration kit for dentistry which can easily evaluate the compatibility of color tones of restoration materials for dentistry.SOLUTION: The demonstration kit for dentistry includes at least two artificial teeth for restoration with missing parts and at least one prosthesis material formed of a restoration material for dentistry. The missing parts of the at least two artificial teeth for restoration are each a removal part (W) to which a prosthesis material can be attached or from which a prosthesis material can be removed. The prosthesis material has a removal part (Z) which can be attached to the artificial teeth for restoration or can be removed from the artificial teeth for restoration in a surface facing the removal part (W). The prosthesis material has a shape which can be engaged with the removal part (W) in the removal part (Z). A plurality of restoration samples formed by engaging the prosthesis material and the artificial teeth for restoration with each other are different from each other.SELECTED DRAWING: None

Description

[Technical Field]

[0001] This invention relates to a dental demonstration kit. [Background technology]

[0002] Dental curable compositions, consisting of polymerizable monomers, inorganic fillers, and polymerization initiators, are widely used as materials for repairing tooth defects or cavities. Before the advent of dental composite resins, amalgam and gold alloys were used as dental hardening compositions for filling caries. However, in recent years, improvements in the mechanical strength and adhesion to teeth of dental restorative materials have led to their use not only in front teeth but also in molars and other areas subjected to high occlusal pressure. Currently, the majority of filling treatments are performed using dental restorative materials. Dental restorative materials used include dental composite resins and dental mill blanks.

[0003] Dental composite resin is a type of material used in dental treatment to repair teeth damaged by decay or fracture, especially when the decayed portion is minimal. It has rapidly gained popularity because it is inexpensive and can relatively easily achieve a color similar to natural teeth. Restorations using dental composite resin are called direct restorations and are rapidly gaining popularity because they require less tooth structure to be removed, can achieve a color similar to natural teeth, and are easy to perform. Furthermore, in recent years, due to improvements in mechanical strength and adhesion to teeth, dental composite resin is being used not only for the restoration of anterior teeth but also for posterior teeth, which are subjected to high occlusal pressure.

[0004] On the other hand, if there is a large amount of caries, the amount of tooth structure removed increases, making it difficult and complicated to build up dental composite resin in the defective area formed during dental treatment. Therefore, indirect restorations using ceramic inlays / onlays, metal inlays / onlays, CAD / CAM inlays / onlays, etc., are chosen. In recent years, among indirect restorations, CAD / CAM systems have become widespread, which design prosthetics such as inlays and onlays using computers and then fabricate them by cutting them with milling equipment. Dental mill blanks are used as the material to be cut in these CAD / CAM systems. Dental restorative materials manufactured from dental mill blanks possess sufficient mechanical strength to be replaceable with natural teeth.

[0005] In recent years, there has been an increasing demand for dental restorative materials, including dental composite resins and dental mill blanks, that offer highly aesthetic restorations that closely resemble natural teeth. To perform highly aesthetic restorative treatment, it is necessary to determine the color (hue and shade) of the tooth to be restored (sometimes called "shade taking") and select a dental restorative material that matches the determined color. In this case, the restoration is often performed using a single color of dental restorative material, but in order to perform highly aesthetic restorations that faithfully reproduce the color variations depending on the part of the tooth, multiple dental restorative materials of different colors may be layered together.

[0006] The shade taking described above is generally performed using a color swatch called a shade guide. There are various types of shade guides, each designed to facilitate color determination, with differences in the number of color swatches and the configuration of the holders used to hold them. The shade guide consists of samples of 16 different colors (an index consisting of a combination of hue and a mixed index of lightness and saturation, or an index that considers hue, lightness, and saturation. Hereinafter, colors specified by such an index will also be referred to as "shades"). The most widely used is the "VITA Classical Shade Guide" (product name) manufactured by VITA Corporation, which allows the color of the restoration to be determined by comparing the shade guide with the color of the restoration site of the tooth in the oral cavity and the surrounding teeth (Patent Document 1). Dental restorative materials are also often available in the 16 shades mentioned above.

[0007] Also, the above shade guide is used as a method for checking the shade of dental restorative materials. Since dental restorative materials may have slightly different colors depending on the type, manufacturer, and lot even if they are of the same shade, in order to perform accurate shade taking, a method of using a shade guide for each dental restorative material to determine the shade of the dental restorative material is adopted.

[0008] On the other hand, in recent years, dental composite resins have been developed that can repair a wide range of colored teeth to have an appearance similar to natural teeth with a single type of dental composite resin without performing complicated shade taking or selecting the shade of composite resin. For example, when measuring a prosthesis composed of a cured product of a dental composite resin and a dental mill blank on a white background using a spectrocolorimeter, it has been found that the spectroreflectance is substantially constant in a certain wavelength range, so that the prosthesis composed of the cured product of the dental composite resin and the dental mill blank exhibits good color tone compatibility (hereinafter sometimes simply referred to as "color tone compatibility") with natural teeth of a wide range of color tones (Patent Document 2). As a result, it is possible to perform a highly aesthetic direct restoration that is indistinguishable from natural teeth and is compatible with the surrounding dentin. In particular, for cases where there are cavities at the bottom such as Class I / II / V, a single shade of dental restorative material shows good color tone compatibility with natural teeth of a wide range of color tones.

[0009] And a demonstration instrument for understanding the characteristics of a dental composite resin showing color tone compatibility has been developed (Patent Document 3). As a result, the excellent characteristics of dental composite resins having good color tone compatibility for a wide range of color tones can be understood.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

[0011] As shown in Patent Document 2, in recent years, dental restorative materials exhibiting higher color matching than conventional materials have been developed. However, when using a shade guide, since the shade guide is planar, when considering clinical use in which a prosthesis obtained by processing the dental restorative material is applied to a tooth defect, the characteristic of color matching, in which the dental restorative material transmits and reflects the surrounding color, cannot be expressed because there is no tooth structure surrounding the area to be applied. Therefore, the characteristics of dental composite resins that exhibit color matching cannot be visually understood.

[0012] Furthermore, in the demonstration device for direct restoration disclosed in Patent Document 3, the composite resin (curable composition) is filled into the defective area before hardening, and polymerized and hardened to integrate the prosthesis and the restorative artificial tooth. As a result, the prosthesis obtained after hardening adheres to the wall surface of the defective area, making it difficult to remove the prosthesis. Therefore, the color matching that can be confirmed with this demonstration device was limited to only one time.

[0013] In this case, by preparing multiple restorative artificial teeth, it is possible to compare dental composite resins that do not have color matching with dental composite resins that do have color matching, and to understand the color matching of dental composite resins that exhibit color matching. However, it was found that the demonstration device, which hardens after filling the defective area of ​​the restorative artificial tooth with the dental composite resin composition, cannot be used in indirect restoration methods that utilize prostheses that have polymerized and hardened to the desired shape before being filled into the defective area. Therefore, regarding dental composite resins, which possess color compatibility by allowing the surrounding color to pass through and reflect, and thus adapt to a wide range of shades, the visual demonstration did not demonstrate how the color changes before and after application to the missing tooth area. For the reasons stated above, Patent Document 3 did not suggest at all a demonstration instrument that could easily evaluate the color compatibility of dental restorative materials in indirect restorative methods.

[0014] Therefore, the present invention aims to provide a dental demonstration kit that allows for easy evaluation of the color tone of dental restorative materials. [Means for solving the problem]

[0015] As a result of diligent research, the inventors have found that the above problem can be solved by using a dental demonstration kit comprising two or more restorative artificial teeth with defects formed thereon and one or more prostheses made from dental restorative materials, wherein the prostheses and the restorative artificial teeth have attachment / detachment parts, and have thus completed the present invention.

[0016] In other words, the present invention encompasses the following inventions. [1] Includes two or more artificial teeth for restoration with missing parts, and one or more prostheses made of dental restorative materials, The missing portion of each of the two or more artificial teeth for restoration is a removable portion (W) from which the prosthesis can be attached and detached. The prosthesis has a removable portion (Z) on a surface facing the removable portion (W) that can be attached to the artificial tooth for restoration, The prosthesis has a shape that allows it to be fitted into the attachment portion (W) at the attachment portion (Z), A dental demonstration kit comprising multiple restoration samples, each consisting of a prosthesis and a restorative artificial tooth, which are all different from one another. [2] The dental demonstration kit according to [1], wherein the plurality of restoration samples are comprised of any of (i), (ii), or (iii) below. (i) Two or more of the restorative artificial teeth have different shades from each other; or (ii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having different shades; or (iii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having the same color tone. [3] The dental demonstration kit according to [2], which satisfies condition (i) or (ii) above, and wherein the shape of the missing portion of the two or more restorative artificial teeth is the same or substantially the same. [4] A dental demonstration kit according to [2] that satisfies condition (i) or (iii) above, wherein the shape of the missing portion of the two or more restorative artificial teeth is different. [5] A dental demonstration kit according to any one of [2] to [4], wherein the condition (i) above is met and the shades of the restorative artificial tooth are two or more selected from the group consisting of A1, A2, A3, A3.5, A4, B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, and D4. [6] A dental demonstration kit as described in any of [1] to [5], further comprising a coating agent. [7] The dental demonstration kit according to [6], wherein the coating agent contains a polymerization initiator, and the content of the polymerization initiator is 1000 ppm by mass or less. [8] The dental demonstration kit according to [6] or [7], wherein the coating agent contains a polymerizable monomer, and the content of the polymerizable monomer is 10,000 ppm by mass or less. [9] A dental demonstration kit according to any one of [6] to [8], wherein the transparency of the coating agent is ΔL10 or greater.

[10] The dental demonstration kit according to [6], wherein the coating agent is a dental color matching material or water.

[11] The dental demonstration kit described in

[10] , wherein the L*a*b* color system of the dental color matching material is within the following range. L* / w=70.0~110.0, a* / w=-5.0~15.0, and b* / w=-5.0~40.0

[12] A dental demonstration kit according to any one of [1] to

[11] , comprising only a restorative artificial tooth having the detachable portion (W) and a prosthesis having the detachable portion (Z).

[13] A dental demonstration kit according to any one of [1] to

[12] , wherein the dental restorative material is a dental mill blank or a dental composite resin.

[14] A dental demonstration kit according to any one of [1] to

[13] , wherein the missing portion of the restorative artificial tooth is a Class II cavity.

[15] A method for evaluating the color of dental restorative materials, In any of the dental demonstration kits described in [1] to

[14] , A step of preparing a first restoration sample by fitting together the detachable portion (W-1) of the first restorative artificial tooth and the detachable portion (Z) of the prosthesis. Steps to remove the prosthesis from the first restoration sample, A step of preparing a second restoration sample by fitting together the detachable portion (W-2) of the second restorative artificial tooth with the detachable portion (Z) of the prosthesis, and This includes a step of comparing the color of the first restoration sample with the color of the second restoration sample. Methods for evaluating the color of dental restorative materials.

[16] The evaluation method according to

[15] , wherein in a dental demonstration kit, two or more of the restorative artificial teeth have different shades from each other.

[17] The evaluation method according to

[15] or

[16] , wherein the detachable part (W-1) and the detachable part (Z), and / or the detachable part (W-2) and the detachable part (Z), are fitted together via a coating agent. [Effects of the Invention]

[0017] According to the present invention, a dental demonstration kit is available that allows for easy evaluation of the color tone of dental restorative materials. Furthermore, according to the present invention, a dental demonstration kit can be provided that allows for easy evaluation of the color compatibility of dental restorative materials. Furthermore, according to the present invention, by repeatedly attaching and removing a prosthesis made of dental restorative material, it is possible to repeatedly check the color of the prosthesis before and after applying it to the missing portion of the restorative artificial tooth. Therefore, in indirect restoration methods, the color compatibility of the dental restorative material, which allows it to transmit and reflect the surrounding color and adapt to a wide range of shades, can be easily and repeatedly confirmed visually. [Brief explanation of the drawing]

[0018] [Figure 1] This shows the morphological classification of the missing tooth portion for restorative artificial teeth. [Figure 2] This represents one embodiment of a dental demonstration kit according to the present invention. [Figure 3] This is a photograph of one prosthesis and one corresponding restorative artificial tooth used in the dental demonstration kit according to the present invention. [Figure 4] This is a photograph of a restorative sample obtained using the dental demonstration kit according to the present invention. [Modes for carrying out the invention]

[0019] The present invention will be described in detail below. In this specification, the upper and lower limits of numerical ranges (content of each component, values ​​calculated from each component, and physical properties, etc.) can be combined as appropriate. In this specification, "color compatibility" means that when a prosthesis made of dental restorative material is fitted to an object to which a restorative artificial tooth, tooth structure, or other prosthesis is applied, the prosthesis gradually absorbs and incorporates the color tone of the object, and as the incorporated color tone is perceived by the observer's vision, the color tone of the prosthesis appears to change transitionally at the boundary between the object and the prosthesis, thus being able to adapt to a wide range of colors of the object. In other words, "color compatibility" refers to the property that, when a prosthesis is fitted to an object, the color of the prosthesis changes in accordance with the color tone of the object, or appears to change through the viewer's vision, to adapt to that color tone. In this specification, "defect" refers to cavities included in the GV Black classification shown in Figures 1A to 1E (Class I to Class V cavities); cavities not included in the GV Black classification; or defects of other shapes. Furthermore, "defect" corresponds to a removable portion (W) to which a prosthesis can be attached or removed. In this specification, "restorative sample" means, for example, one obtained by attaching the detachable portion (Z) of a prosthesis made from dental restorative material to the missing portion (detachable portion (W)) of a restorative artificial tooth having a missing portion, as shown in Figure 4. Furthermore, in this specification, "shade" means a color specified by an index consisting of a combination of hue and a mixed index of lightness and saturation, or a color specified by an index that takes hue, lightness and saturation into consideration, and refers to the symbols in the "VITA Classical Shade Guide" manufactured by VITA.

[0020] The dental demonstration kit of the present invention includes two or more restorative artificial teeth having a missing portion, and one or more prostheses made of dental restorative material. Each of the two or more artificial teeth for restoration has a removable portion (W) from which the prosthesis can be attached and detached. The prosthesis has a removable portion (Z) on a surface facing the removable portion (W) that can be attached to the artificial tooth for restoration, The prosthesis has a shape that allows it to be fitted into the attachment portion (W) at the attachment portion (Z), Multiple restoration samples, formed by fitting the aforementioned prosthesis and the aforementioned artificial teeth for restoration, are all different from one another. "Multiple restoration samples are different from each other" means that two or more restoration samples differ in appearance, including their color tone.

[0021] In the demonstration kit of the present invention, when a prosthesis is attached to a restorative artificial tooth, the prosthesis gradually absorbs the color tone of the restorative artificial tooth, and the color tone is reflected so that, to the observer's eye, the color tone of the boundary between the restorative artificial tooth and the prosthesis changes transitionally. Therefore, if the observer cannot perceive the aforementioned color change through their eyes, it can be said that the prosthesis made of dental restorative material does not have color compatibility. Furthermore, when a color-compatible prosthesis is used, when the prosthesis is removed, the absorption of the color tone of the restorative artificial tooth gradually disappears, and it begins to absorb room light. When it is removed and placed on a table, it will exhibit the color tone of the prosthesis on the table. The color changes before, during, and after insertion and removal of such prostheses, making it easier to understand the color match (preferably color compatibility) between the prosthesis and the restorative artificial tooth. Furthermore, if a prosthesis made of dental restorative material does not have color compatibility, the aforementioned color change cannot be perceived by the observer through vision. Therefore, by comparing it with the color change when a prosthesis made of dental restorative material does have color compatibility, it is possible to easily evaluate and recognize that the dental restorative material does not have color compatibility. Therefore, the demonstration kit of the present invention allows for easy evaluation of whether or not a prosthesis made of dental restorative material has color compatibility.

[0022] In the dental demonstration kit of the present invention, it is preferable that the multiple restorative samples are composed of any of the following (i), (ii), or (iii) such that the multiple restorative samples are different from each other. (i) Two or more of the restorative artificial teeth have different shades from each other; (ii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having different shades; or (iii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having the same color tone. In the dental demonstration kit of the present invention, the case in which condition (i) two or more of the restorative artificial teeth have different shades from each other is referred to as the "first embodiment." Furthermore, as a dental demonstration kit of the present invention, the case in which condition (ii) two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having different shades, is referred to as the "second embodiment." Furthermore, the case in which condition (ii) two or more of the restorative artificial teeth have the same shade and the kit includes two or more prostheses having the same color tone is referred to as the "third embodiment." In the dental demonstration kit of the present invention, unless otherwise specified as "first embodiment," "second embodiment," or "third embodiment," the following applies to all embodiments.

[0023] <Dental restorative materials> There are no particular limitations on the dental restorative materials included in the dental demonstration kit of the present invention; various dental materials can be used. Specifically, various resin materials can be used, including dental composite resins such as composite resins for filling carious cavities, composite resins for core buildup, and composite resins for crowns; denture base resins), denture base relining materials, impression materials, resin cements, luting materials such as resin-added glass ionomer cements, fissure sealing materials, dental mill blanks, temporary crowns, and artificial tooth materials. Among these, the dental restorative material of the present invention is preferably a resin material because it has high aesthetics and excellent mechanical strength, more preferably a resin material with an inorganic filler content of 50% by mass or more, and even more preferably a dental mill blank or dental composite resin.

[0024] [Dental mill blanks] The dental mill blank according to the present invention is not particularly limited and may be a commercially available one or one with a known composition. For example, the composition of the dental mill blank may include a polymerizable monomer (A), a polymerization initiator (B), an inorganic filler (C), and a coloring agent (D).

[0025] There are no particular restrictions on the polymerizable monomer (A) used in the dental mill blank of the present invention. Known polymerizable monomers used in dental curable compositions can be used, and radical polymerizable monomers can be used in particular. The radical polymerizable monomer is preferably an ester of an unsaturated carboxylic acid or a (meth)acrylamide derivative, more preferably a (meth)acrylic acid ester or a (meth)acrylamide derivative, and even more preferably a (meth)acrylic acid ester. Polymerizable monomer (A) may be used alone or in combination of two or more types. In this specification, the term "(meth)acrylic" is used to encompass both methacrylic and acrylic. Furthermore, "(meth)acrylic monomer" is used to encompass both (meth)acrylic acid esters and (meth)acrylamide derivatives. Examples of (meth)acrylic acid esters and (meth)acrylamide derivatives are shown below.

[0026] • Monofunctional (meth)acrylic acid esters and (meth)acrylamide derivatives For example, methyl (meth)acrylate, isobutyl (meth)acrylate, benzyl (meth)acrylate, dodecyl (meth)acrylate, 2-(N,N-dimethylamino)ethyl (meth)acrylate, 2,3-dibromopropyl (meth)acrylate, 3-(meth)acryloyloxypropyltrimethoxysilane, 11-(meth)acryloyloxyundecyltrimethoxysilane, 2-hydroxyethyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate T, 10-hydroxydecyl (meth)acrylate, propylene glycol mono(meth)acrylate, glycerin mono(meth)acrylate, erythritol mono(meth)acrylate, phenoxyethylene glycol (meth)acrylate, isobornyl (meth)acrylate, 3-phenoxybenzyl (meth)acrylate, N-methylol (meth)acrylamide, N-hydroxyethyl (meth)acrylamide, N,N-bis(hydroxyethyl)(meth)acrylamide, N,N-dimethyl (meth)acrylamide, N,N-diethyl (meth)acrylamide, N,N-di-n-propyl(meth)acrylamide, N-ethyl-N-methyl(meth)acrylamide, (meth)acryloylmorpholine, (meth)acryloyloxide decylpyridinium bromide, (meth)acryloyloxide decylpyridinium chloride, (meth)acryloyloxyhexadecylpyridinium bromide, (meth)acryloyloxyhexadecylpyridinium chloride, ethoxylated-o-phenylphenol(meth)acrylate, ethoxylated-m-phenylphenol(meth)acrylate, ethoxylated-p-phenylphenol(meth) Examples include acrylates, propoxylated-o-phenylphenol (meth)acrylate, propoxylated-m-phenylphenol (meth)acrylate, propoxylated-p-phenylphenol (meth)acrylate, o-phenoxybenzyl (meth)acrylate, m-phenoxybenzyl (meth)acrylate, p-phenoxybenzyl (meth)acrylate, 2-(o-phenoxyphenyl)ethyl (meth)acrylate, 2-(m-phenoxyphenyl)ethyl (meth)acrylate, and 2-(p-phenoxyphenyl)ethyl (meth)acrylate.

[0027] • Bifunctional (meth)acrylic acid esters Examples include aromatic bifunctional (meth)acrylic acid esters and aliphatic bifunctional (meth)acrylic acid esters.

[0028] Examples of aromatic, bifunctional (meth)acrylic acid esters include 2,2-bis((meth)acryloyloxyphenyl)propane, 2,2-bis[4-(3-acryloyloxy-2-hydroxypropoxy)phenyl]propane, 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl]propane (commonly known as Bis-GMA), 2,2-bis(4-(meth)acryloyloxypolyethoxyphenyl)propane, 2-(4-(meth)acryloyloxydiethoxyphenyl)-2-(4-(meth)acryloyloxyethoxyphenyl)propane, 2,2- Examples include bis(4-(meth)acryloyloxypropoxyphenyl)propane, 2,2-bis(4-(meth)acryloyloxyisopropoxyphenyl)propane, 2,2-bis(4-(meth)acryloyloxydipropoxyphenyl)propane, 2-(4-(meth)acryloyloxydipropoxyphenyl)-2-(4-(meth)acryloyloxytriethoxyphenyl)propane, 9,9-bis[4-(2-(meth)acryloyloxyethoxy)phenyl]fluorene, 9,9-bis[4-(2-(meth)acryloyloxypolyethoxy)phenyl]fluorene, diphenylbis[3-(meth)acryloyloxypropyl]silane, and methylphenylbis[3-(meth)acryloyloxypropyl]silane.

[0029] Examples of aliphatic difunctional (meth)acrylic acid esters include glycerol di(meth)acrylate, ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate (commonly known as 3G), propylene glycol di(meth)acrylate, butylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 1,3-butanediol di(meth)acrylate, 1,5-pentanediol di(meth)acrylate, and 1,6-hexanediol di(meth)acrylate. Examples include acrylate, 1,10-decanediol di(meth)acrylate, 1,12-dodecanediol di(meth)acrylate, 1,2-bis(3-(meth)acryloyloxy-2-hydroxypropyloxy)ethane, tricyclodecanedimethanol di(meth)acrylate, 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl) diacrylate, 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl) dimethacrylate (commonly known as UDMA), and dicyclohexylbis[3-(meth)acryloyloxypropyl]silane.

[0030] Among the above-mentioned bifunctional (meth)acrylic acid esters, 2,2-bis[4-(3-acryloyloxy-2-hydroxypropoxy)phenyl]propane, 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (Bis-GMA), 2,2-bis(4-(meth)acryloyloxypolyethoxyphenyl)propane (average number of moles of ethyleneoxy groups added: 1-30), and triethylene glycol diacrylate are selected from the viewpoint of improving the mechanical strength of the resulting cured product. Triethylene glycol dimethacrylate (3G), 1,10-decanediol di(meth)acrylate, 1,12-dodecanediol di(meth)acrylate, 1,2-bis(3-(meth)acryloyloxy-2-hydroxypropyloxy)ethane, tricyclodecanedimethanol di(meth)acrylate, 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl) diacrylate, 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl) dimethacrylate More preferably, bis(UDMA), 2,2-bis[4-(3-methacryloyloxy-2-hydroxypropoxy)phenyl]propane (Bis-GMA), 2,2-bis(4-methacryloyloxypolyethoxyphenyl)propane (average number of moles of ethyleneoxy groups added: 1-30), triethylene glycol dimethacrylate (3G), 1,10-decanediol dimethacrylate, 1,12-dodecanediol dimethacrylate, 1,2-bis(3-methacryloyloxy-2-hydroxypropyloxy Ethane, tricyclodecanedimethanol dimethacrylate, and 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl)dimethacrylate (UDMA) are more preferred, and 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane (Bis-GMA), 2,2-bis(4-methacryloyloxypolyethoxyphenyl)propane (average number of moles of ethyleneoxy groups added: 2.6), and triethylene glycol dimethacrylate (3G) are particularly preferred.

[0031] • Trifunctional or more (meth)acrylic acid esters Examples include trimethylolpropane tri(meth)acrylate, trimethylolethane tri(meth)acrylate, trimethylolmethane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tri(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, N,N'-(2,2,4-trimethylhexamethylene)bis[2-(aminocarboxy)propane-1,3-diol]tetra(meth)acrylate, and 1,7-di(meth)acryloyloxy-2,2,6,6-tetra(meth)acryloyloxymethyl-4-oxaheptane.

[0032] Furthermore, as the polymerizable monomer (A), oligomers and polymers having radical polymerizable groups such as (meth)acrylic acid ester groups can also be suitably used. For example, polymerizable prepolymers described in Japanese Patent Publication No. 50-42696, unsaturated urethane oligomers described in Japanese Patent Publication No. 2011-144121, polyfunctional acrylate compounds described in Japanese Patent Publication No. 2006-510583, and prepolymers described in Japanese Patent Publication No. WO2020 / 122192 can be used.

[0033] There are no particular restrictions on the polymerization initiator (B) used in the dental mill blank of the present invention; it can be selected from polymerization initiators used in general industry, and among them, polymerization initiators used in dental applications are preferred. Photopolymerization initiators and chemical polymerization initiators are particularly preferred as polymerization initiators (B). Polymerization initiators (B) may be used individually or in combination of two or more as appropriate.

[0034] The inorganic filling material (C) used in the dental mill blank of the present invention is not particularly limited and mainly consists of various types of glass and silica, and may contain heavy metals, boron, aluminum oxides, etc. as needed. One type of inorganic filling material (C) may be used alone, or two or more types may be used in combination. In this specification, "main component" refers to the component that is present in the largest quantity. The content of the main component may be 20% by mass or more, and may also be 30% by mass or more, 40% by mass or more, 50% by mass or more, 60% by mass or more, or 70% by mass or more.

[0035] There are no particular restrictions on the coloring agent (D) used in the dental mill blank of the present invention, and any inorganic pigment and / or organic pigment can be used without restriction depending on the desired color tone of the dental mill blank. The coloring agent (D) may be used alone or in combination of two or more types.

[0036] The inorganic filler (C) used in the dental mill blank of the present invention can be pre-treated with a known silane compound such as a silane coupling agent to adjust its affinity with polymerizable monomers, thereby obtaining a composition with excellent handling properties as a dental material. Any known silane compound can be used without restriction.

[0037] There are no particular limitations on the method for manufacturing dental mill blanks according to the present invention, and they may be manufactured using known manufacturing methods. Specifically, a method is mentioned in which an inorganic filler molded body, which is obtained by press-molding an inorganic filler, is brought into contact with a polymerizable monomer-containing composition, and the polymerizable monomer is polymerized and cured, as this allows for more efficient acquisition of dental mill blanks having desired physical properties. Furthermore, it can be obtained by blending and mixing each component in predetermined amounts. There are no particular restrictions on the order of blending; each component may be blended all at once, or blended in two or more separate steps. In addition, the components may be mixed or kneaded as needed, or degassed, such as by vacuum degassing. One method involves filling the obtained dental curable composition into a single container and polymerizing and curing it.

[0038] [Dental Composite Resin] The dental composite resin according to the present invention is not particularly limited and may be a commercially available product or one with a known composition. For example, the composition of the dental composite resin may include a polymerizable monomer (A), a polymerization initiator (B), an inorganic filler (C), and a coloring agent (D).

[0039] The polymerizable monomer (A) used in the dental composite resin of the present invention is not particularly limited, and any polymerizable monomer known for use in dental curing compositions can be used, with radical polymerizable monomers being particularly preferred. As the polymerizable monomer (A) used in dental composite resin, the polymerizable monomer (A) exemplified above as used in dental mill blanks may be used.

[0040] There are no particular restrictions on the polymerization initiator (B) used in the dental composite resin of the present invention; it can be selected from polymerization initiators used in general industry, and among them, polymerization initiators used in dental applications are preferred. Photopolymerization initiators and chemical polymerization initiators are particularly preferred as polymerization initiators (B). Polymerization initiators (B) may be used individually or in combination of two or more as appropriate.

[0041] The inorganic filler (C) used in the dental composite resin of the present invention is not particularly limited and mainly consists of various types of glass and silica, and may contain heavy metals, boron, aluminum oxides, etc. as needed. One type of inorganic filler (C) may be used alone, or two or more types may be used in combination.

[0042] There are no particular limitations on the coloring agent (D) used in the dental composite resin of the present invention, and either inorganic pigments and / or organic pigments can be used without limitation depending on the desired color tone of the dental composite resin.

[0043] The inorganic filler material (C) of the dental composite resin of the present invention, when pre-surface-treated with a known silane compound such as a silane coupling agent, allows for adjustment of its affinity with polymerizable monomers, resulting in a composition with excellent handling properties as a dental material. Any known silane compound can be used without limitation.

[0044] There are no particular restrictions on the method for producing dental composite resin according to the present invention, and it can be produced by known manufacturing methods. Specifically, it can be produced by blending each component in predetermined amounts and mixing them. There are no particular restrictions on the order of blending, and each component may be blended all at once, or it may be blended in two or more separate steps. Furthermore, the components may be mixed or kneaded as needed, or degassed using methods such as vacuum degassing. The resulting dental composite resin composition can be filled into a single container (such as a syringe) to create a single-component (single-paste) dental composite resin.

[0045] In one embodiment, the dental demonstration kit of the present invention can be used to evaluate whether or not it has color compatibility when it is unknown whether or not it has color compatibility. The first or third embodiment can be used to evaluate whether or not it has color compatibility. In other embodiments, the dental demonstration kit of the present invention can be used to emphasize the color matching of a prosthesis when it is known that the prosthesis has color matching properties. The first, second, or third embodiments can be used to emphasize color matching. When it is known that a prosthesis has color matching properties and the purpose is to visually emphasize such color matching, a suitable example is a dental demonstration kit in which the dental restorative material used for the prosthesis is a color-matching dental curable composition. As described above, the dental curable composition used as the material for the prosthesis in the dental demonstration kit of the present invention can be used even when the color compatibility is unknown, and can be selected according to the purpose of use, so it is not particularly limited.

[0046] Examples of dental curable compositions that can be used as materials for prostheses in embodiments used to emphasize the color matching of prostheses are given below. Dental curable compositions having color compatibility are not particularly limited as long as they have color compatibility, but examples include the composition described in International Publication No. 2022-092193. Specifically, a dental curable composition having color compatibility is a dental curable composition comprising a polymerizable monomer (A), a filler (B), a polymerization initiator (C), and a coloring agent (D), The ratio R of the spectral reflectance at wavelengths of 650 nm, 700 nm, and 750 nm to the spectral reflectance at wavelength 600 nm when a 1.0 mm thick cured product of the dental hardening composition is measured on a white background using a spectrophotometer. 650 / 600 , R 700 / 600 , and R 750 / 600 Examples of dental hardening compositions include those in the range of 97% to 103%.

[0047] The ratio of spectral reflectances can be evaluated using a spectrophotometer (SE6000, manufactured by Nippon Denshoku Industries Ltd., light source: D65 / 2, measurement window: φ6 mm) with a standard white plate placed behind a 1 mm thick dental hardening composition, measuring the spectral reflectance for wavelengths from 380 to 780 nm. Furthermore, in the aforementioned color-matching dental curable composition, it is preferable that the contrast ratio defined by the following formula (1) in a cured product with a thickness of 1.0 mm satisfies 0.35 to 0.65. Contrast ratio = Y b / Y w (1) (Here, Y b This represents the Y value of the XYZ color system measured against a black background, Y w (This represents the Y value of the XYZ color system measured against a white background.) The contrast ratio can be calculated by measuring the Y value of the tristimulus of a cured dental hardening composition with a thickness of 1 mm using a spectrophotometer against a black and white background. Furthermore, in the aforementioned color-matching dental curable composition, it is preferable that the light diffusivity LD, defined by the following formula (2), in a cured product with a thickness of 0.25 mm satisfies 0.0001 to 0.99. LD = (I5 / cos5°) / I0(2) The light diffusivity LD can be calculated by preparing a cured product of a dental hardening composition with dimensions of φ30 mm × thickness of 0.25 mm, measuring the luminous intensity distribution of transmitted light from -90° to +90° using a goniophotometer (Murakami Color Technology Laboratory Co., Ltd., GP-200) at an incident light angle of 0°, and calculating the light diffusivity LD according to equation (2).

[0048] As the polymerizable monomer (A) used in a dental curable composition having color compatibility, the polymerizable monomer (A) exemplified above, which is used in dental mill blanks, may be used. The inorganic filler (C) used in a dental curable composition having color compatibility preferably contains inorganic fine particles (inorganic primary particles) with an average particle size of 0.05 to 1 μm, more preferably contains inorganic fine particles of 0.08 to 0.9 μm, and even more preferably contains inorganic fine particles of 0.1 to 0.8 μm. Furthermore, the inorganic filler (C) used in the dental hardening composition having color compatibility preferably contains inorganic aggregated particles formed by the aggregation of the inorganic primary particles. The average particle diameter of the inorganic filler (C) can be determined by laser diffraction scattering method or electron microscope observation of particles. The laser diffraction scattering method can be measured on a volume basis using ethanol or an aqueous solution of 0.2% sodium hexametaphosphate as a dispersion medium by, for example, a laser diffraction type particle size distribution measuring device (such as "SALD-2300" manufactured by Shimadzu Corporation). Particularly, the laser diffraction scattering method is convenient for measuring particle diameters of 0.1 μm or more. For electron microscope observation, a scanning electron microscope (such as SU3500, SU3800, S-4000, etc. manufactured by Hitachi High-Technologies Corporation) can be used. Specifically, for electron microscope observation, for example, an electron micrograph of the particles is taken, and the particle diameters of the particles (200 or more) observed within the unit visual field of the photograph can be calculated by measuring using image analysis type particle size distribution measurement software (Mac-View (manufactured by Mount Tech Co., Ltd.)). Furthermore, the specific surface area of the inorganic aggregated particles is preferably 10 m 2 / g or more, more preferably 15 m 2 / g or more, still more preferably 18 m 2 / g or more, particularly preferably 20 m 2 / g or more. Also, the specific surface area of the inorganic aggregated particles is preferably 300 m 2 / g or less, more preferably 250 m 2 / g or less, still more preferably 200 m 2 / g or less, particularly preferably 190 m 2 / g or less, and may even be 170 m 2 / g or less, and further may even be 150 m 2 / g or less. The specific surface area of the inorganic aggregated particles can be determined by the BET method. Specifically, for example, it can be measured using a specific surface area measuring device (such as the "BELSORP-mini" series manufactured by Microtrac·BEL Corporation). There is no particular limitation on the method for producing the dental curable composition having the color tone compatibility. Similar to the method for producing the dental composite resin, it can be prepared by a known production method, and the production method described in International Publication No. 2022-092193 can also be used.

[0049] <Prosthetic devices> The prosthesis of the present invention is not particularly limited and can be made from various dental restorative materials. Specifically, the prostheses of the present invention can be made from various resin materials (dental composite resins such as composite resin for filling carious cavities, composite resin for core buildup, and composite resin for crowns; denture base resins), hardened denture base relining materials, hardened impression materials, hardened luting materials such as resin cement and resin-added glass ionomer cement, hardened dental fissure sealing materials, machined dental mill blanks using CAD / CAM systems, machined temporary crowns, machined artificial tooth materials, and so on. Among these, the prosthesis of the present invention is preferably made from a resin material because it has high aesthetics and excellent mechanical strength, more preferably from a resin material having an inorganic filling material content of 50% by mass, and even more preferably a product machined using a CAD / CAM system from a dental mill blank, or a cured product of dental composite resin.

[0050] The dental demonstration kit of the present invention includes one or more of the aforementioned prostheses. By including one or more prostheses having a shape that can be fitted into the missing portion (removable portion (W)) of a restorative artificial tooth, the color matching of the prosthesis can be easily evaluated by attaching the prosthesis to the missing portion of the restorative artificial tooth to form a restoration sample. The number of prostheses included in the dental demonstration kit of the present invention is preferably 1 to 10, more preferably 1 to 8, and even more preferably 1 to 5, from the viewpoint of good operability during observation, ease of comparing the colors of each prosthesis, and ease of handling. In the first embodiment, by attaching it to restorative artificial teeth having different shades, it is possible to easily confirm that it matches the color tone of any of the restorative artificial teeth and that it has color compatibility.

[0051] The shape of the prosthesis is not particularly limited as long as it has a shape that can be fitted into the missing portion of the restorative artificial tooth. Specifically, the prosthesis has a removable portion (Z) on a surface facing the removable portion (W) of the restorative artificial tooth, which can be attached to and detached from the restorative artificial tooth when the prosthesis is fitted into the missing portion (removable portion (W)) of the restorative artificial tooth.

[0052] The attachment / detachment portion (Z) of the prosthesis can be manufactured by machining (cutting and / or grinding, etc.) so that it can be fitted into the missing portion of the restorative artificial tooth. The machining method is not particularly limited, and known methods can be used. For machining, commercially available dental CAD / CAM machines, polishing equipment, etc., can be used. For example, a prosthesis can be manufactured by scanning the structural information of the missing portion of a restorative artificial tooth that will interlock with it, using a scanner, and then using a CAD / CAM machine to cut and shape the prosthesis so that it can interlock with the missing portion based on the obtained scan data, and polishing it as needed. Furthermore, a gap may be provided between the attachment / detachment portion (W) of the restorative artificial tooth and the attachment / detachment portion (Z) of the prosthesis to facilitate removal after the prosthesis has been fitted into the missing portion (attachment / detachment portion (W)) of the restorative artificial tooth. By placing the coating agent described below in the aforementioned gap, the color tone at the boundary between the restorative artificial tooth and the prosthesis appears to change gradually, making it easier to emphasize the color compatibility of the prosthesis. For example, in Figures 1A to 1E, a coating agent may be applied to the gap 10 (or the wall surface 10 of the defective portion) in the defective portion 20 of the restorative artificial tooth 10. The aforementioned gap can be measured as the thickness of the coating.

[0053] As described above, the shape of the prosthesis is such that it has a removable portion (Z) on the surface facing the removable portion (W) that can be attached to the restorative artificial tooth. There are no particular restrictions on the shape and size of the occlusal surface of the prosthesis (the surface opposite to the surface facing the removable portion (W) of the restorative artificial tooth), however, from the viewpoint of being able to restore the occlusal surface to its original shape and observe it, it is preferable that it be the same as the shape and size of the original occlusal surface of the restorative artificial tooth before the defect was formed.

[0054] There are no particular restrictions on the surface characteristics of the occlusal surface of the prosthesis, but from the viewpoint of simulating indirect restorations using inlays / onlays in general dental treatment, it is preferable that the surface characteristics be those achieved by machining using a dental CAD / CAM system. If necessary, cutting and polishing to the desired surface characteristics may be performed using carbide burs, diamond burs, polishing brushes, or buffs.

[0055] There are no particular restrictions on the shade of the aforementioned prosthesis, but since it is made from dental restorative materials, the shade will be determined by the shade of the dental restorative material. It is preferable to use a shade commonly used in dental restorative materials, as this allows for a more realistic simulation of indirect restorations.

[0056] When there are two or more of the aforementioned prostheses, there are no particular restrictions on the shape and size of the prostheses. However, from the viewpoint of suitability for comparison, it is preferable that the size of each prosthesis be within the range of 90-100% identical in volume ratio between the prostheses. When observing prosthetics that are being compared to each other, it is easier to observe the accurate color tone if they are the same volume. Therefore, it is more preferable that the volume ratio is within the range of 93-100% identical, and even more preferable that it is within the range of 95-100% identical.

[0057] There are no particular restrictions on the color of the prostheses when there are two or more prostheses, but the color can be appropriately determined for each embodiment in order to facilitate visual comparison, depending on the purpose of evaluating (determining) whether or not there is color compatibility, or to emphasize known color compatibility. For example, when using two or more prostheses made of dental restorative materials, and the shades of the two or more restorative artificial teeth are different, it is preferable that the prostheses be the same in color and type, as they can be placed side by side and compared simultaneously in different shades, eliminating the need to change the prostheses and making it easier to emphasize color matching. Furthermore, when using two or more prosthetic devices made of dental restorative materials, and the shades of the two or more restorative artificial teeth are different, it is preferable to use different types of prosthetic devices from the perspective of evaluating whether or not the color matches. In the first embodiment, in order to enhance the effect of color matching, the prosthesis may include two or more prostheses made of dental restorative material, and the two or more artificial teeth for restoration may have different shades and different shapes of the missing parts.

[0058] <Restorative artificial teeth> The materials and internal structure of the restorative artificial teeth included in the dental demonstration kit of the present invention are not particularly limited, but it is preferable to use those having a multilayer structure such as a dentin layer and an enamel layer, from the viewpoint of having an internal structure similar to that of a natural tooth and enabling more precise evaluation of color matching. Furthermore, when having dentists who lack experience using color-matching dental restorative materials perform simulated indirect restorations to check their results, it is preferable to use acrylic resin teeth from a cost perspective.

[0059] Restorative artificial teeth may be anterior teeth, posterior teeth, or other types, but from the standpoint of suitability for comparison, it is preferable that their shape and size be consistent among the restorative artificial teeth being compared. From the viewpoint of enabling more precise evaluation of color matching, the size (thickness, height, and width) of the restorative artificial tooth is preferably the same as or substantially the same as that of a natural tooth. "Substantially identical in size to a natural tooth" means that the thickness, height, and width are within ±3.0 mm of those of a natural tooth. The size (thickness, height, and width) of the restorative artificial tooth can be set as needed to be within ±2.0 mm, ±1.5 mm, ±1.0 mm, ±1.0 mm, ±0.5 mm, etc., relative to the thickness, height, and width of the natural tooth. For a restorative artificial tooth to be substantially identical in thickness, height, and width to a natural tooth, the difference between the thickness, height, and width of a natural tooth and the thickness, height, and width of the restorative artificial tooth is less than 10%, preferably less than 5%, more preferably less than 3%, and even more preferably less than 1%. The term "different" for the missing portions of two or more restorative artificial teeth means that they differ beyond the scope of "substantially identical" as described above, and are not particularly limited as long as they differ in thickness, height, or width. Furthermore, even if the thickness, height, and width are the same, if the location and / or number of missing portions differ, the missing portions of two or more restorative artificial teeth can be said to be different.

[0060] There are no particular restrictions on the shape and size of the missing portion of a restorative artificial tooth, but from the viewpoint of suitability for comparison, it is preferable that the volume ratio of the missing portions of the restorative artificial teeth being compared is within the range of 90-100%. When observing restorative artificial teeth that are being compared to each other, it is easier to observe the accurate color tone if they have the same volume. Therefore, it is more preferable that the volume ratio is within the range of 93-100% identical, and even more preferable that it is within the range of 95-100% identical. One preferred embodiment is a dental demonstration kit in which the shapes of the missing portions of multiple restorative artificial teeth are identical or substantially identical. As mentioned above, the fact that the shape of the missing portion of multiple restorative artificial teeth is substantially identical means that the shape and size of the missing portion are within the range of 90-100% identical in terms of volume ratio. The number of missing parts of a restorative artificial tooth is not limited as long as the prosthesis can interlock with the attachment / detachment portion (Z) on the surface facing the attachment / detachment portion (W) of the restorative artificial tooth, and may be one or two or more. In one preferred embodiment, the number of missing parts of the restorative artificial tooth is one. The number of missing teeth in the restorative artificial teeth can be changed according to the number of prosthetics included in the dental demonstration kit.

[0061] The shape of the missing tooth portion of a restorative artificial tooth can be appropriately selected according to the purpose, but it is preferable to select from the general classification of missing tooth morphologies, which are Class I to Class V cavities. Figure 1 shows the classification of cavity morphologies. Figure 1A represents a restorative artificial tooth 30 with a Class I cavity. Figure 1B represents a restorative artificial tooth 30 with a Class II cavity. Figure 1C represents a restorative artificial tooth 30 with a Class III cavity. Figure 1D represents a restorative artificial tooth 30 with a Class IV cavity. Figure 1E represents a restorative artificial tooth 30 with a Class V cavity. In one preferred embodiment, the defect is preferably limited to a pit or fissure or includes the interproximal surface of a tooth, more preferably includes the interproximal surface of an anterior or posterior tooth, and even more preferably is a Class II cavity, from the viewpoint of simulating treatment in general dental treatment.

[0062] The location and size of the missing portion in restorative artificial teeth can be determined as appropriate depending on the purpose. For example, in a Class II OD cavity (Occlusal Distal cavity), when the restorative artificial tooth of the dental demonstration kit of the present invention is placed on a horizontal surface with its bottom surface (cervical side) facing downwards, it is preferable to form a cavity that is concave, measuring 1 to 10 mm vertically, 1 to 10 mm horizontally, and 1 to 5 mm deep, starting from the center or approximately the center of the occlusal surface of the restorative artificial tooth when viewed from directly above. It is more preferable to form a cavity that is concave, measuring 2 to 6 mm vertically, 2 to 6 mm horizontally, and 2 to 4 mm deep. Furthermore, in a Class II MOD cavity, when the restorative artificial tooth of the demonstration kit of the present invention is placed on a horizontal surface with its bottom face down, and the occlusal surface of the restorative artificial tooth is viewed from directly above, it is preferable to form a concave shape extending from the side of the margin to the side of the opposite margin, with dimensions of 10-15 mm in length, 1-10 mm in width, and 1-5 mm in depth. It is more preferable to form a concave shape with dimensions of 10-13 mm in length, 2-6 mm in width, and 2-4 mm in depth.

[0063] The number of restorative artificial teeth included in the dental demonstration kit of the present invention is preferably 2 to 10, more preferably 2 to 8, and even more preferably 2 to 5, from the viewpoint of good operability during observation, ease of comparing the colors of each prosthesis, and ease of handling.

[0064] Restorative artificial teeth have no particular restrictions on materials, and various dental materials can be used. The materials used for restorative artificial teeth can specifically include various resin materials (dental composite resins such as composite resin for filling carious cavities, composite resin for core buildup, and composite resin for crowns; denture base resins), denture base relining materials, impression materials, luting materials such as resin cement and resin-added glass ionomer cement, fissure sealing materials, dental mill blanks, temporary crowns, and artificial tooth materials (for example, porcelain teeth made from feldspar, silica, and / or clay (for example, porcelain teeth made from porcelain containing feldspar and silica); resin teeth made from synthetic resins (for example, acrylic resin teeth, etc.); hard resin teeth made from hard synthetic resins, etc.)). Restorative artificial teeth may be commercially available. Examples of commercially available products include hard resin teeth (product name "GC ZenOpal," manufactured by GC Corporation). The missing portion of a restorative artificial tooth can be created by machining (cutting and / or grinding, etc.) a restorative artificial tooth that does not have a missing portion before processing. The machining method is not particularly limited, and known methods can be used. For machining, commercially available dental CAD / CAM machines, polishing equipment, etc., can be used.

[0065] <First Embodiment> In the first embodiment, the shades of the restorative artificial teeth included in the demonstration kit of the present invention are different from each other, in order to enable efficient determination of the color tone of dental restorative materials and to determine whether or not the prosthesis has color compatibility.

[0066] In the first embodiment of the demonstration kit of the present invention, it is preferable to include one prosthesis made of a single-color dental restorative material and two or more restorative artificial teeth of different shades. As a result, when the same prosthesis is fitted into two or more different shades (for example, B1 and A3.5), if the prosthesis has color compatibility, the color of the prosthesis will appear to change transitionally at the boundary with the restorative tooth, regardless of which restorative tooth's attachment / detachment portion (W) it is fitted into. This makes it easier to determine whether or not there is color compatibility, and thus makes the performance of color compatibility more visually understandable. In the demonstration kit of the present invention, it is preferable that the formation position, shape, and size of the defect in the restorative artificial tooth are the same for all restorative artificial teeth.

[0067] In the first embodiment, the shades of the plurality of restorative artificial teeth are preferably two or more shades selected from the group consisting of A1, A2, A3, A3.5, A4, B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, and D4, satisfying condition (i) above, in order to reproduce the color tones of the "VITA Classical Shade Guide" manufactured by VITA Corporation used in actual dental treatment.

[0068] There are no particular restrictions on how the multiple reconstructive artificial teeth are arranged when observed; they may be placed randomly, arranged in any order the observer desires, or arranged in a line. The demonstration kit of the present invention includes a display plate (flat plate), on which the restorative artificial teeth can be placed as described above. From the standpoint of facilitating observation, it is preferable to select a brightness permutation order from highest to lowest brightness in the following order: B1→A1→B2→D2→A2→C1→C2→D4→A3→D3→B3→A3.5→B4→C3→A4→C4, and arrange them in a single line.

[0069] <Detachable part> The detachable parts are structural components of the prosthesis and the restorative artificial tooth, respectively. The detachable portion (W) of the restorative artificial tooth is the surface of the missing tooth portion of the restorative artificial tooth, and is the part to which the prosthesis can be attached and detached. The detachable portion (W) is not particularly limited as long as it can interlock with the prosthesis, and may include the wall surface 10 of the missing tooth portion in Figure 1B. The attachment / detachment portion (Z) of the prosthesis is the surface that faces the surface of the missing portion when it is attached to the artificial tooth for restoration.

[0070] There are no particular restrictions on the shape of the attachment / detachment portion of the aforementioned restorative artificial tooth, and it may be cut and polished to a desired shape as needed. From the viewpoint of being able to simulate the cutting of carious parts in general dental treatment, it is preferable that the shape be created by cutting using a carbide bur or diamond bur.

[0071] There are no particular restrictions on the shape and size of the attachment / detachment portion (Z) of the prosthesis. From the viewpoint of being able to be attached to the missing portion of the restorative artificial tooth, it is preferable that it be within the range of 90-100% identical to the shape and size of the missing portion of the restorative artificial tooth, more preferably within the range of 93-100% identical, and even more preferably within the range of 95-100% identical.

[0072] The attachment and detachment of the prosthesis and the restorative artificial tooth is preferably achieved by physical interlocking, surface tension using an adhesive liquid, or adhesion using various one-touch connectors or one-touch joints. Among these, physical interlocking and retention by surface tension using an adhesive liquid are particularly preferred because they offer good operability and do not interfere with the observation of the color of the prosthesis.

[0073] <Repair Sample> The restoration sample is prepared in a removable state by attaching the prosthesis to the missing portion (removable portion (W)) of the restorative artificial tooth via a removable portion (Z) on the surface facing the removable portion (W). There are no particular restrictions on the gap between the attachment / detachment portion (Z) of the prosthesis and the attachment / detachment portion (W) of the restorative artificial tooth within the restorative sample. However, it is preferable to have a coating agent present in the gap, as it reflects the tooth color of the bottom surface of the missing area and is more suitable for observing color matching.

[0074] The shape and thickness of the gap between the attachment / detachment portion (Z) of the prosthesis and the attachment / detachment portion (W) of the restorative artificial tooth within the restorative sample are factors that influence the shape and size of the attachment / detachment portion (Z) of the prosthesis and the shape and size of the attachment / detachment portion (W) of the restorative artificial tooth. When preparing the prosthesis and the restorative artificial tooth, measuring the shape and thickness of the gap between the attachment points of the prosthesis and the restorative artificial tooth beforehand allows for determining the shape and thickness of the coating material in the restorative sample during subsequent indirect restorations.

[0075] There are no particular restrictions on the means of measuring the shape and thickness of the gap between the attachment / detachment area of ​​the prosthesis and the attachment / detachment area of ​​the restorative artificial tooth within the restoration sample, and general measurement methods may be used. Among these, X-ray projection, optical coherence tomography (OCT), ultrasound examination, and impressions using plaster are recommended as they allow for non-invasive assessment of the internal structure.

[0076] In particular, molding using plaster is preferred because it allows for accurate measurement of the shape and thickness of the coating agent of the present invention. Specifically, the gap between the attachment and detachment parts of the prosthesis and the restorative artificial tooth is sufficiently filled with plaster, and the shape and thickness of the plaster are measured after removal, thereby determining the shape and thickness of the coating agent. The average thickness of the coating agent in the restorative samples in this study is a factor that affects the thickness of the gap when the attachment points of the prosthesis and the restorative artificial tooth are fitted together, and can be considered as the thickness of the aforementioned gap. The average thickness of the coating agent in the restoration sample is not particularly limited, but it should not be thicker than the depth of the missing portion of the artificial tooth for restoration. Furthermore, from the viewpoint of confirming the color tone of the prosthesis itself, it is preferably 0.001 mm to 2 mm, more preferably 0.005 mm to 1.5 mm, and even more preferably 0.01 mm to 0.8 mm. If the average thickness of the coating material in the restoration sample exceeds 2 mm, the color of the bottom surface of the missing portion of the artificial tooth and the color of the coating material will be more prominent than the color of the prosthesis, making it unsuitable from the standpoint of confirming the color of the prosthesis. The average thickness of the coating material within the restoration sample can be considered as the thickness of the gap between the attachment / detachment area of ​​the prosthesis and the attachment / detachment area of ​​the restorative artificial tooth within the restoration sample. The method for measuring the average thickness of the coating agent in the repair sample is as described in the examples below.

[0077] The demonstration kit of the present invention preferably consists only of a restorative artificial tooth having the detachable portion (W) and a prosthesis having the detachable portion (Z), but it may also include coating agents and the like, as long as they do not hinder the effects of the present invention.

[0078] <Coating agent> In one embodiment, the dental demonstration kit of the present invention preferably includes a coating agent because it improves the color reflection of the restorative artificial tooth. If the dental demonstration kit includes a coating agent, it is preferable to apply the coating agent sufficiently to the attachment / detachment portion (W) of the restorative artificial tooth and / or the attachment / detachment portion (Z) of the prosthesis, with the aim of ensuring a tight seal between the attachment / detachment portion of the prosthesis and the coating agent, and between the coating agent and the attachment / detachment portion of the restorative artificial tooth, then attach the attachment / detachment portions together, remove any excess coating agent, and then observe the prosthesis.

[0079] There are no particular restrictions on the coating agent; general materials may be used, or commercially available products may be used. The aforementioned coating agent is preferable to have high transparency because it reflects the tooth color of the bottom surface of the defect and is suitable for observation. The coating agent is preferably water, colored water, glycerin, grease, fluorine / silicone oil release agent, non-silicone oil release agent, or dental color matching material. It is more preferably a non-volatile solvent, and even more preferably a dental color matching material or water, because it offers high aesthetics and excellent handling properties.

[0080] The coating agent is not particularly limited, and in some embodiments, it may be a dental curable composition comprising a polymerizable monomer, a polymerization initiator, and a filler, and optionally a coloring agent. When the coating agent contains polymerizable monomers, the content of polymerization initiators in the coating agent is preferably 1000 ppm by mass or less. In particular, once the prosthesis and the restorative artificial tooth are bonded together, they cannot be removed, making it impossible to evaluate the color match. Therefore, it is more preferable that the content be 500 ppm by mass or less, and even more preferable that it be 100 ppm by mass or less.

[0081] Examples of polymerization initiators include organic peroxides and / or inorganic peroxides. Examples of organic peroxides include well-known ones without particular limitations. Representative organic peroxides include hydroperoxides, peroxyesters, ketone peroxides, peroxyketals, dialkylperoxides, diacylperoxides, and peroxydicarbonates.

[0082] Inorganic peroxides are not particularly limited and include all known types. Representative inorganic peroxides include peroxodisulfates and peroxodiphosphates. Specific examples include sodium peroxodisulfate, potassium peroxodisulfate, aluminum peroxodisulfate, and ammonium peroxodisulfate.

[0083] There are no particular restrictions on the coating agent, but if the coating agent contains polymerizable monomers, the content of polymerizable monomers in the coating agent is preferably 10,000 ppm by mass or less. In particular, if the attachment and detachment parts of the prosthesis and the restorative artificial tooth are bonded together, they cannot be removed and the color matching cannot be evaluated, so it is more preferable that the content be 1,000 ppm by mass or less, and even more preferable that it be 100 ppm by mass or less.

[0084] The polymerizable monomers mentioned above are not particularly limited and include those known. Examples include polymerizable monomers used in dental curing compositions, and in particular, radical polymerizable monomers.

[0085] There are no particular restrictions on the coating agent, but if the coating agent contains a polymerizable monomer and a polymerization initiator, it is preferable that the content of the polymerization initiator is 1,000 ppm by mass or less and the content of the polymerizable monomer is 10,000 ppm by mass or less. In particular, if the attachment and detachment parts of the prosthesis and the restorative artificial tooth are bonded together, it becomes impossible to remove them and evaluate the color match. Therefore, it is more preferable that the polymerization initiator content is 500 ppm by mass or less and the polymerizable monomer content is 1000 ppm by mass or less, and even more preferable that the polymerization initiator content is 100 ppm by mass or less and the polymerizable monomer content is 100 ppm by mass or less.

[0086] There are no particular restrictions on the transparency ΔL at a thickness of 1.0 mm of the coating agent, but it is preferably 10 to 60, more preferably 11 to 58, and even more preferably 12 to 55, as it makes it easier to reflect the bottom surface of the missing portion of the restorative artificial tooth. Transparency ΔL was measured by forming a coating layer with a thickness of 1.0 mm and placing a standard white plate behind (below) the coating layer. * a * b * Lightness (L) in a color system * / w) and L measured with a standard black plate placed behind (below) the coating layer. * a * b* Lightness (L) in a color system * It can be calculated as the difference (absolute value) from / b). The method for measuring transparency ΔL is specifically as described in the examples below.

[0087] In the demonstration kit of the present invention, the coating agent is an optional component. One embodiment is a demonstration kit that does not include a coating agent. Because the demonstration kit of the present invention does not contain a coating agent, the operation of applying a coating agent is unnecessary, making color evaluation easier.

[0088] The aforementioned coating agent, which is a dental color matching confirmation material, is not particularly limited and may consist of a known composition, be manufactured by a known manufacturing method, or be a commercially available product. Known dental color matching materials include, for example, those with compositions described in Japanese Patent Publication No. 2007-137851, Japanese Patent Publication No. 2010-143851, Japanese Patent Publication No. 2011-132185, etc. Examples of commercially available products include the "Panavia (registered trademark) V5 Try-in Paste" series (manufactured by Kuraray Noritake Dental Co., Ltd.). Examples of dental color matching materials include those whose composition contains a polyhydric alcohol as the main component (e.g., glycerin, polyethylene glycol, propylene glycol, polypropylene glycol, etc.), a filler, and a coloring agent. The content of these components is not particularly limited, as long as it is within a range that provides effectiveness as a dental color matching material.

[0089] The type of filling material used for dental color matching confirmation is not particularly limited, and known inorganic and / or organic filling materials can be used.

[0090] Inorganic filling materials for dental color matching include silicon dioxide (quartz, glass, silica, etc.), alumina, ceramics, diatomaceous earth, kaolin, clay minerals such as montmorillonite, activated clay, synthetic zeolite, mica, calcium phosphate, and barium sulfate. Among these, colloidal silica and alumina are preferred. Preferred colloidal silica includes silica with small particle size obtained by spray pyrolysis, such as the product name "Aerosil (registered trademark)" of Nippon Aerosil Co., Ltd.; silica sol obtained by wet processes; and monodisperse silica obtained by sol-gel processes. Furthermore, inorganic pigments such as titanium dioxide and red iron oxide may be used as at least a portion of the filler.

[0091] Examples of organic fillers used for dental color matching include polymethyl methacrylate, polyethyl methacrylate, polymers of polyfunctional methacrylates, polyamides, polystyrene, polyvinyl chloride, chloroprene rubber, nitrile rubber, and styrene-butadiene rubber.

[0092] When inorganic fillers used as dental color matching materials are pre-treated with known silane compounds such as silane coupling agents, their affinity with glycerin can be adjusted, resulting in a composition with excellent handling properties as a dental material. Any known silane compound can be used without restriction.

[0093] There are no particular restrictions on the coloring agents used in dental color matching materials; inorganic pigments and / or organic pigments can be used without restriction, depending on the desired color tone of the dental color matching material.

[0094] There are no particular restrictions on the method for producing the dental color matching confirmation material according to the present invention, and it may be produced by known manufacturing methods. Specifically, it can be obtained by blending and mixing each component in predetermined amounts. There are no particular restrictions on the order of blending, and each component may be blended all at once, or blended in two or more separate steps. Furthermore, the materials may be mixed or kneaded as needed, or degassed using methods such as vacuum degassing. The resulting dental curable composition can be filled into a single container (such as a syringe) to create a single-component (single-paste) dental color matching material.

[0095] There are no particular restrictions on the L*a*b* color system for dental color matching materials with a thickness of 1.0 mm; any value is acceptable. When observing, it is preferable that L* / w = 70.0 to 110.0, a* / w = -5.0 to 15.0, and b* / w = -5.0 to 40.0, as this allows for a better reproduction of the natural tooth color and makes it easier to evaluate color matching. It is more preferable that L* / w = 73.0 to 100.0, a* / w = -4.5 to 14.0, and b* / w = 0.0 to 37.0, and it is even more preferable that L* / w = 75.0 to 90.0, a* / w = -4.0 to 13.0, and b* / w = 5.0 to 35.0, as this allows for a higher degree of reproduction of the natural tooth color.

[0096] Another embodiment of the present invention is a method for evaluating the color of dental restorative materials, In any of the aforementioned dental demonstration kits, A step of preparing a first restoration sample by fitting together the detachable portion (W-1) of the first restorative artificial tooth and the detachable portion (Z) of the prosthesis. Steps to remove the prosthesis from the first restoration sample, A step of preparing a second restoration sample by fitting together the detachable portion (W-2) of the second restorative artificial tooth with the detachable portion (Z) of the prosthesis, and This includes a step of comparing the color of the first restoration sample with the color of the second restoration sample. One example is a method for evaluating the color of dental restorative materials.

[0097] In the method for evaluating the color of the dental restorative material, it is preferable that two or more of the restorative artificial teeth have different shades from each other, from the standpoint of evaluating whether or not the color of the dental restorative material is compatible. The aforementioned method for evaluating the color of dental restorative materials allows for a simple evaluation of whether or not a dental restorative material has color compatibility.

[0098] In the method for evaluating the color of the dental restorative material, the detachable part (W-1) and the detachable part (Z), and / or the detachable part (W-2) and the detachable part (Z) may be fitted together via a coating agent. The method of applying the coating agent is not particularly limited. In the method for evaluating the color of the dental restorative material, the number of restorative artificial teeth is preferably 2 to 10, more preferably 2 to 8, and even more preferably 2 to 5, from the viewpoint of good maneuverability during observation, ease of comparing the colors of each prosthesis, and ease of handling. Furthermore, in the method for evaluating the color of dental restorative materials, the number of prostheses is preferably 1 to 10, more preferably 1 to 8, and even more preferably 1 to 5, from the viewpoint of good operability during observation and ease of comparing the colors of each prosthesis, making it easier to evaluate whether or not the color matches. In one preferred embodiment, a method for evaluating the color of dental restorative materials is provided, in which the dental demonstration kit includes one prosthesis.

[0099] In the step of comparing the color of the first restoration sample with the color of the second restoration sample, the method of comparing the colors is not particularly limited and may be done visually, or the colors of the first and second restoration samples may be measured with a colorimeter and compared. Color can be measured using known measuring devices (e.g., spectrophotometers, spectrophotometers, etc.). Furthermore, the method of comparing the colors is not particularly limited as long as the first and second restored samples are compared using the same criteria, and may be either spectrophotometric or direct reading of stimulus values. For example, using a dental colorimeter (product name "Crystaleye", manufactured by Olympus Corporation), the L*a*b* color system (JIS Z 8781-4:2013 Colorimetry - Part IV: CIE 1976 L*a*b* color space) (L* ,a * ,b * As a result, the color (brightness, saturation, etc.) of the original restorative artificial tooth before the missing portion is formed, and the color (brightness, saturation, etc.) of the restorative artificial tooth with a color-matched prosthesis fitted to it are measured, and the color difference (ΔE) can be calculated from the measurement results. From this difference, it is also possible to evaluate whether or not the color of the prosthesis is a good match.

[0100] <Second Embodiment> In a second embodiment, the demonstration kit of the present invention includes two or more restorative artificial teeth having the same shade, and two or more prostheses having different shades. In the second embodiment, it is preferable that the prosthesis includes one or more prostheses made of dental restorative materials that have color matching properties and one or more prostheses made of dental restorative materials that do not have color matching properties, in order to make it easier to emphasize color matching. In the second embodiment, by demonstrating the lack of color compatibility using a prosthesis made of a dental restorative material that does not have color compatibility, it becomes easier to emphasize the color compatibility of dental restorative materials that do have color compatibility. By creating restoration samples by fitting prostheses made from dental restorative materials with and without color matching properties onto artificial teeth of the same shade, it becomes clear that those with color matching properties have a completely different appearance and a transitional color tone, making it easier to emphasize the difference caused by the presence or absence of color matching. In the second embodiment, as described above, when preparing a restoration sample, it is preferable that the defective portions of two or more restoration artificial teeth be identical in terms of formation position, shape, and size, in order to make it easier to visually understand the differences due to the presence or absence of color matching. On the other hand, in the second embodiment, since the color matching does not depend on the shape of the missing portion, the shape of the missing portion of the restorative artificial tooth may be different. Unless otherwise specified, the rest of the system is the same as that described in the first embodiment.

[0101] <Third Embodiment> In the third embodiment, the demonstration kit of the present invention includes two or more of the restorative artificial teeth having the same shade, and the kit includes two or more prostheses having the same color tone. In a third embodiment of the demonstration kit of the present invention, it is preferable to have two or more prostheses made of a single-color dental restorative material and two or more restorative artificial teeth having the same shade and having different shapes of missing teeth. Prosthetic restorations are fabricated from dental restorative materials of the same shade, each corresponding to a different tooth defect. For example, when using two restorative artificial teeth of the same shade but with different tooth defects, two types of prosthetic restorations are fabricated, each with a shape that can fit into the tooth defect of the respective artificial tooth. The resulting prosthetic restorations can be fitted into the tooth defects of the artificial teeth, visually demonstrating that color matching does not depend on the shape of the tooth defect; that is, the color appears to change even when the shape of the tooth defect is different. In the third embodiment, the shapes of the missing portions of two or more restorative artificial teeth may be different, as this enhances the effect of color matching. Unless otherwise specified, the rest of the system is the same as that described in the first embodiment.

[0102] The present invention includes embodiments that combine some or all of the above configurations in various ways, within the scope of the technical idea of ​​the present invention, as long as they achieve the effects of the present invention. [Examples]

[0103] The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0104] (Polymerizable monomer (A)) UDMA: 2,2,4-trimethylhexamethylenebis(2-carbamoyloxyethyl) dimethacrylate (manufactured by Kyoeisha Chemical Co., Ltd.) 3G: Triethylene glycol dimethacrylate (manufactured by Shin-Nakamura Chemical Industry Co., Ltd.)

[0105] (Polymerization initiator (B)) THP: 1,1,3,3-Tetramethylbutyl hydroperoxide (manufactured by NOF Corporation)

[0106] (Inorganic filler (C)) The inorganic filler (C) used was obtained from the manufacturing example described below.

[0107] [Manufacturing of inorganic filler (c-1)] 100 parts by mass of commercially available barium glass (GM27884 UF2.0, manufactured by Schott, average particle size: 2.0 μm, refractive index: 1.53), 1.2 parts by mass of 3-methacryloyloxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd.), 0.15 parts by mass of acetic acid, 5 parts by mass of distilled water, and 170 parts by mass of ethanol were placed in a three-necked flask and stirred at room temperature for 1 hour. After distilling off the ethanol under reduced pressure, the mixture was vacuum dried at 40°C for 16 hours, and then heated at 90°C for 3 hours to obtain an inorganic filler (c-1) with a surface treatment layer.

[0108] (Coloring agent (D)) Titanium dioxide, iron black (black iron oxide), yellow iron oxide, red iron oxide

[0109] (Monomer composition) [Production of monomer composition (m-1)] 60 parts by mass of UMDA and 40 parts by mass of 3G were prepared as polymerizable monomer (A), and 1 part by mass of THP was prepared as polymerization initiator (B). The THP was dissolved in a mixture of UMDA and 3G to prepare monomer composition (m-1).

[0110] (Dental restorative materials) As a dental restorative material, a dental mill blank (U-1) obtained in the manufacturing example below was used. In addition, commercially available resin blocks or dental composite resins were used as dental restorative materials.

[0111] [Example of manufacturing dental mill blank (U-1)] Dental mill blanks were prepared by mixing and kneading the materials and proportions listed in Table 1 at room temperature (23°C) in the dark, and then vacuum degassing the resulting homogenized mixture to prepare a dental hardening composition. A dental curable composition was filled into a rectangular, concave container with internal dimensions of 15 mm x 15 mm and a depth of 20 mm. This container was then fixed in the chamber of an autoclave, and the chamber was purged 12 times with 99.9% nitrogen gas at 0.15 MPa. Subsequently, the pressure was increased to 0.4 MPa with nitrogen gas, and the temperature inside the chamber was raised to 130°C immediately after the pressurization was completed. The mixture was then held at 130°C for 60 minutes to polymerize and harden, thereby obtaining a dental mill blank (U-1).

[0112] [Table 1]

[0113] [Commercially available product] • Dental mill blank (product name "Katana® Avencia® Block 2", A2LT, 14L size, manufactured by Kuraray Noritake Dental Co., Ltd., L* / w=79.72, a* / w=1.67, b* / w=26.64, ΔL=14.11) • Dental composite resin 1 (product name "Clearfil® Majesty® ES-2 Universal", L* / w=84.36, a* / w=2.21, b* / w=22.76, ΔL=18.34, manufactured by Kuraray Noritake Dental Co., Ltd.) • Dental composite resin 2 (product name "Clearfil (registered trademark) Majesty (registered trademark) ES-2 A2", L* / w=85.15, a* / w=1.93, b* / w=24.40, ΔL=16.37, manufactured by Kuraray Noritake Dental Co., Ltd.) These measurement results will be described later [lightness (L * / w), chromaticity index (a * / w, b * / w), transparency (ΔL * This value was measured using the method described in [Calculation of )].

[0114] (Topical agent) As the coating agent, the dental color matching material (t-1) obtained in the manufacturing example below was used. In addition, commercially available dental color matching materials were used as is.

[0115] [Manufacturing example of dental color matching material (t-1)] Dental color matching material (t-1) was obtained by mixing and kneading a dental color matching material (product name "Panavia® V5 Try-in Paste (Clear)", manufactured by Kuraray Noritake Dental Co., Ltd.) and Japanese Pharmacopoeia concentrated glycerin (manufactured by Kao Corporation) in a 1:2 ratio, homogenizing the mixture, and then vacuum degassing it.

[0116] [Commercially available dental color matching materials] t-CL: (Product name "Panavia (registered trademark) V5 Try-in Paste (Clear)", manufactured by Kuraray Noritake Dental Co., Ltd.) t-UN: (Product name: Panavia (registered trademark) V5 Try-in Paste (Universal), manufactured by Kuraray Noritake Dental Co., Ltd.) t-BR: (Product name: Panavia (registered trademark) V5 Try-in Paste (Brown), manufactured by Kuraray Noritake Dental Co., Ltd.) t-BL: (Product name "Panavia (registered trademark) V5 Try-in Paste (Bleach)", manufactured by Kuraray Noritake Dental Co., Ltd.)

[0117] [Lightness (L * / w), chromaticity index (a * / w, b * / w), transparency (ΔL * ) Calculation] The lightness and chromaticity of coating agents and dental restorative materials were evaluated using the above-mentioned spectrophotometer (SE6000, manufactured by Nippon Denshoku Industries Ltd., light source: D65 / 2, measurement window: φ6 mm) based on the ratio of spectral reflectance. (1) Topical agent The coating agents were evaluated as follows: Specifically, a 1.0 mm thick round spacer was placed on top of a round cover glass, an appropriate amount of coating agent was applied, and a round cover glass was placed on top of the coating agent and pressed down. A standard white plate was placed behind the round cover glass with the coating agent sandwiched in it. In that state, the center, L * a * b * Lightness (L) in a color system * / w), and chromaticity index (a * / w, b * The wattage ( / w) was measured (n=1). Next, with the standard black board placed behind the round cover glass with the coating agent sandwiched in it, L * a * b * Lightness (L) in a color system * We measured (n=1) / b). The obtained L * / w and L * Transparency (ΔL) from the difference between / b * ) was calculated. (2) Dental mill blanks Dental mill blanks were milled to a thickness of 1 mm, polished to a mirror finish on both sides, and the hardened material was measured for brightness, chromaticity index, and transparency in the same manner as described above. The measurement results are shown in Table 1 for the various physical properties. (3) Dental composite resin The dental composite resin was filled into a stainless steel mold (φ10mm x 1mm thick), sandwiched between cover glass, and while under pressure, cured by irradiating both sides with LED light curing equipment (α-Light V, manufactured by Morita Manufacturing Co., Ltd., peak wavelength: (violet) 400-408nm, (blue) 465-475nm) for 45 seconds each. The cured material was removed from the mold, and its brightness, chromaticity index, and transparency were measured in the same manner as described above. The measurement results for dental composite resin 1 and dental composite resin 1 are as described above.

[0118] [Measurement of the average thickness of the coating between the prosthesis and the restorative artificial tooth] The average thickness of the coating agent between the prosthesis and the restorative artificial tooth was determined by pouring plaster into the space between the attachment / detachment area of ​​the restorative artificial tooth and the attachment / detachment area of ​​the prosthesis, and then measuring the size of the resulting plaster mold. Specifically, dental ultra-hard gypsum (product name "M-Lock Peach," manufactured by Morita Corporation) was applied to the attachment and detachment area of ​​the restorative artificial tooth, the prosthesis was attached, any excess gypsum was wiped off, and it was left to stand for one hour. Subsequently, the prosthesis was removed and the hardened plaster was taken out. The thickness of this plaster was measured at 10 random locations using a micrometer (product name "Digimatic Point Micrometer", tip angle: 15°, Mitutoyo Corporation), and the average value was taken as the average thickness of the coating between the prosthesis and the restorative artificial tooth. The average thickness of the coating can be considered as the thickness of the space in the gap when the attachment points of the prosthesis and the restorative artificial tooth are fitted together (the shortest distance between the prosthesis and the restorative artificial tooth).

[0119] Tests X and Y described below were performed using the kits obtained in each example and comparative example. The results are shown in Tables 2-4. [Exam X] The difference in color between the color of the prosthesis attached to the missing tooth area and the color of the restorative artificial tooth was visually confirmed. Ten dental professionals were asked to examine this color difference and choose one of two answers to the question, "Was there a transitional change in color at the boundary between the prosthesis and each restorative artificial tooth?" [X-1: It was possible to determine whether the color tone had changed or not.] [X-2: It was not possible to determine whether the color tone was changing transitionally.]

[0120] Regarding the above evaluation items, it is preferable that 6 / 10 or more respondents answered [X-1] that they were able to determine whether or not there was a transitional change in color tone, more preferably 8 / 10 or more, and even more preferably 10 / 10.

[0121] [Test Y] The difference in color tone (color difference) was visually confirmed when comparing the color tone of the prosthesis with that of the artificial tooth attached (restorative sample state) and the color tone of the prosthesis on a black table after it was removed. Ten dental professionals were asked to observe the color difference at this time and to select one of the following two answers to the question, "Does the color of the prosthesis change between the color within each restorative artificial tooth and the color on the table, and is it a color that is compatible with a wide range of shades?" [Y-1: It was determined that the color tone was either compatible with a wide range of color tones or not compatible with a wide range of color tones.] [Y-2: It was not possible to determine whether the color tone was compatible with a wide range of other colors.] Regarding the above evaluation items, it is preferable that 6 / 10 or more of the respondents answered [Y-1], indicating that they were able to determine the presence or absence of a color tone that is compatible with a wide range of color tones, more preferably 8 / 10 or more, and even more preferably 10 / 10.

[0122] [Evaluation as a demonstration kit] Based on the evaluation results of [Test X] and [Test Y] above, the following indicators were used to determine the number of people who selected X-2 and Y-2. A: The number of people who selected X-2 and Y-2 is 2 or less for both. B: Other than A and C C: The number of people who selected either X-2 or Y-2 is 5 or more; or, evaluation is impossible because the prosthetic teeth cannot be fitted to the attachment / detachment parts of each prosthetic tooth or cannot be removed from the attachment / detachment parts of each prosthetic tooth. Regarding the above judgment results, for a demonstration kit, it is preferable that the result be "A" or "B" and more preferable that it be "A" in order to enable efficient judgment of the color tone of dental restorative materials (including emphasis on known color compatibility and / or evaluation of the presence or absence of color compatibility).

[0123] [Example 1] Hard resin teeth in shades B1 and A3.5 (product name "GC ZenOpal", molar #6 (size: mandibular 1 form, 4 sizes, PL16), manufactured by GC Corporation) were used as restorative artificial teeth. Class II OD cavities measuring 4.0 mm vertically x 6.0 mm horizontally x 3.0 mm deep were created in each case, with the same size and position of the missing portion, and a removable portion was fabricated. To allow them to be fitted into the detachable portions of the restorative artificial teeth of shades B1 and A3.5, which have cavities formed therein, prostheses for B1 (B1-U1-1) and A3.5 (A3.5-U1-1), respectively, were fabricated from a dental mill blank (U-1) using a dental CAD / CAM machine (product name "DWX-51D", manufactured by Roland DG Corporation). Using a dental laboratory electric handpiece (product name "Maxima 80", manufactured by Argofile Japan Co., Ltd.), sprues were cut using dental grinding equipment (product name "Matsukaze Carborundum Point HP", model: 11, manufactured by Matsukaze Co., Ltd.), and the sprue marks were smoothed using dental grinding equipment (product name "Matsukaze Carborundum Point HP", model: 13, manufactured by Matsukaze Co., Ltd.). Furthermore, the shape of the attachment / detachment area of ​​the prosthesis was modified, and then the occlusal surface was polished. The occlusal surface was polished using the following method. The occlusal surface was polished using a dental rubber abrasive (product name "EVE Universal White", product number: H4, manufactured by Sandental Co., Ltd.). The dental rubber abrasive was then replaced with a dental polishing tool (product name "Abbott Robinson Bristol Brush No. 11 Soft", manufactured by Buffalo Dental Manufacturing Co., Ltd. (US)). Abrasive particles of dental polishing material (product name "Porseny Haydn", manufactured by Tokyo Dental Materials Co., Ltd.) were applied to the tip of the brush, and the surface was polished with the brush fitted with these abrasive particles to achieve a glossy finish. The dental demonstration kit was manufactured in the manner described above. Next, a dental color matching material (product name "Panavia® V5 Try-in Paste (Clear)", manufactured by Kuraray Noritake Dental Co., Ltd.) was applied to the attachment / detachment area of ​​the Shade B1 restorative artificial tooth, and the B1 prosthesis was attached to create the first restorative sample. Any excess dental color matching material that overflowed from the attachment / detachment area was wiped away. For the first restoration sample, Figure 3A and Figure 3B show photographs of the restorative prosthesis with a Class II OD cavity before the B1 prosthesis was attached to the restorative prosthesis, and a photograph of the B1 prosthesis, respectively. Figure 4 shows a photograph of the first restoration sample after the B1 prosthesis has been attached to the restorative artificial tooth. Next, a dental color matching material (product name "Panavia® V5 Try-in Paste (Universal)", manufactured by Kuraray Noritake Dental Co., Ltd.) was applied to the attachment / detachment area of ​​the A3.5 restorative artificial tooth, and the A3.5 prosthesis was attached to create a second restorative sample. Then, tests X and Y described above were performed using each of the fabricated prostheses and restorative artificial teeth.

[0124] [Example 2] Using the same method as in Example 1, a dental mill blank (U-1) was used to fabricate a prosthesis that could be used for both B1 and A3.5 (B1 and A3.5). A dental demonstration kit was prepared in the same manner as in Example 1, except that the prosthesis was changed to a prosthesis for both B1 and A3.5 (B1 and A3.5), and tests X and Y were conducted. Specifically, the dental color matching material listed in Table 1 was applied to the attachment / detachment area of ​​a shade B1 restorative artificial tooth, and the B1 / A3.5 prosthesis was attached to create the first restorative sample. Any excess dental color matching material that overflowed from the attachment / detachment area was wiped away. Next, the prosthesis for B1 and A3.5 was removed, washed with water, and the dental color matching material described in Table 1 was applied to the attachment / detachment area of ​​the A3.5 restorative artificial tooth. The prosthesis for B1 and A3.5 was then attached to create a second restorative sample. The above tests X and Y were performed using each of the fabricated prostheses and restorative artificial teeth.

[0125] [Example 3] Dental demonstration kits were prepared in the same manner as in Example 1, except that the missing portion of the restorative artificial tooth was changed from a Class II OD cavity to a Class I cavity (location: center, diameter: 4 mm, depth: 3 mm), and the prosthesis was changed to a B1 prosthesis (B1-U1-2) and an A3.5 prosthesis (A3.5-U1-2) having a removable portion that can be fitted into the removable portion of the restorative artificial teeth B1 and A3.5 where the aforementioned cavities were formed. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0126] [Example 4] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental color matching material was changed to the one listed in Table 1. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0127] [Example 5] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental color matching material was changed to the one listed in Table 1. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0128] [Example 6] A dental demonstration kit was prepared in the same manner as in Example 1, except that the prosthesis for B1 (B1-U1-1) used in Example 1 was replaced with the prosthesis below (B1-U1-3), and the prosthesis for A3.5 (A3.5-U1-1) was replaced with the prosthesis below (A3.5-U1-3). The prosthesis (B1-U-3) was fabricated by using a dental laboratory electric handpiece (product name "Maxima 80", manufactured by Argofile Japan Co., Ltd.) to cut the attachment surface of the prosthesis (B1-U1-1) with dental grinding equipment (product name "Shofu Carborundum Point HP", model: 11, manufactured by Shofu Co., Ltd.) to cut the thickness in a range of approximately 0.5 to 1.0 mm by visual inspection. The prosthesis (A3.5-U1-3) was similarly fabricated by machining the attachment surface of the prosthesis (A3.5-U1-1). The dental demonstration kit obtained was used to perform the above tests X and Y.

[0129] [Example 7] Except for the purpose of varying the thickness of the coating layer in the restoration sample, the entire surface of the attachment / detachment portion of the prosthesis (the surface facing the missing portion of the restorative artificial tooth) was visually cut to a thickness of approximately 1.0 to 1.5 mm, and the restorative prosthesis for B1 (B1-U1-4) and the restorative prosthesis for A3.5 (A3.5-U1-4) were prepared in the same manner as in Example 6. A dental demonstration kit was prepared in the same manner as in Example 1, except that the prostheses were changed to these. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0130] [Example 8] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental color matching material was changed to the one listed in Table 1. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0131] [Example 9] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental color matching material was replaced with water. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0132] [Example 10] A dental demonstration kit was prepared in the same manner as in Example 1, except that dental color matching material was not used. Tests X and Y described above were performed using the obtained dental demonstration kit.

[0133] [Example 11] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental mill blank (U-1) was replaced with one of the dental restorative materials listed in Table 3, and the prostheses were changed to prostheses (B1-Ave-A2) and prostheses (A3.5-Ave-A2). The above tests X and Y were performed using the obtained dental demonstration kit. Prostheses (B1-Ave-A2) and (A3.5-Ave-A2) were fabricated in the same manner as in the examples, except that the dental mill blank (U-1) was replaced with the dental restorative material listed in Table 3.

[0134] [Example 12] A dental demonstration kit was prepared in the same manner as in Example 1, except that the dental restorative material was changed to dental composite resin 1, and the prostheses were changed to B1 prostheses (B1-ES2-1) and A3.5 prostheses (A3.5-ES2-1), and tests X and Y were performed. Specifically, high-vacuum grease (manufactured by DuPont-Toray Specialty Materials Co., Ltd.) was applied to the defective areas of the restorative artificial teeth in shades B1 and A3.5 where defects had been formed. Dental composite resin 1 was then built up on each, and the surface shape of the restorative artificial tooth was formed by pressing it with a mold of the restorative artificial tooth that had been previously made using silicone impression material (Memozil® 2, manufactured by Kulzer Japan). The surface was then irradiated for 10 seconds with a dental visible light curing unit (product name "PenCure 2000," manufactured by Morita Manufacturing Co., Ltd.), and then the mold was removed and irradiated for another 10 seconds. After that, the filled dental composite resin 1 was removed, the restorative artificial tooth and the hardened material were washed with water, the hardened material was polished and buffed in the same manner as in Example 1, and a dental demonstration kit was prepared. A dental demonstration kit was prepared using the same method as in Example 1, and tests X and Y described above were performed.

[0135] [Example 13] Except for changing the dental restorative materials to those listed in Table 4 and changing the prostheses to B1 prostheses (B1-ES2-A2) and A3.5 prostheses (A3.5-ES2-A2), a dental demonstration kit was prepared in the same manner as in Example 12, and tests X and Y described above were performed.

[0136] [Example 14] A dental demonstration kit was prepared in the same manner as in Example 12, except that dental color matching materials were not used, and tests X and Y described above were performed.

[0137] [Example 15] A dental demonstration kit was prepared in the same manner as in Example 1, except that the restorative artificial tooth for shade A3.5 was changed from an OD cavity to a Class II MOD cavity (location: central, 4.0 mm vertical x 11.0 mm horizontal x 3.0 mm deep) as the missing portion, and one prosthesis was changed to an A3.5 prosthesis (A3.5-U1-3) corresponding to the said restorative artificial tooth. The aforementioned A3.5 prosthesis (A3.5-U1-3) was fabricated to fit into the removable portion of the A3.5 restorative artificial tooth in which the Class II MOD cavity was formed. The dental demonstration kit obtained was used to perform the above tests X and Y.

[0138] [Example 16] A dental demonstration kit was prepared in the same manner as in Example 1, except that the restorative artificial tooth of shade A3.5 was changed to a restorative artificial tooth of shade B1, the missing portion of the shade B1 restorative artificial tooth was changed to a Class II MOD cavity (location: center, 4.0 mm vertical x 11.0 mm horizontal x 3.0 mm deep), and one prosthesis was changed to a B1 prosthesis (B1-U1-3) corresponding to the restorative artificial tooth. The B1 prosthesis (B1-U1-3) was fabricated to fit into the removable portion of the restorative artificial tooth of B1 in which the Class II MOD cavity was formed. The dental demonstration kit obtained was used to perform the above tests X and Y.

[0139] [Example 17] A dental demonstration kit was prepared in the same manner as in Example 1, except that the restorative artificial tooth in shade A3.5 was changed to a restorative artificial tooth in shade B1, and the prosthesis for A3.5 (A3.5-U1-1) was changed to the prosthesis for B1 (B1-Ave-A2) used in Example 11. The dental demonstration kit obtained was used to perform the above tests X and Y.

[0140] [Comparative Example 1] In the dental demonstration kit, a prosthesis similar to that in Example 1 was prepared, except that a shade guide (product name "VITA Classical Shade Guide", shade: B1 / A3.5, manufactured by VITA) was used instead of a restorative artificial tooth, and the following tests were performed. First, a B1 shade prosthesis (B1-U1-1) was placed on the tooth surface of the B1 shade guide, and the difference in color between the prosthesis and the shade guide was visually confirmed. Subsequently, the same visual confirmation of the difference in color between the A3.5 shade guide and the A3.5 shade prosthesis (A3.5-U1-1) was performed. Ten dental professionals were asked to examine this color difference and to select one of two possible answers to the question, "Was there a transitional change in color tone at the boundary between the prosthesis and each shade guide?" [X-1: It was possible to determine whether the color tone had changed or not.] [X-2: It was not possible to determine whether the color tone was changing transitionally.]

[0141] Regarding the above evaluation items, it is preferable that 6 / 10 or more respondents answered [X-1] that they were able to determine whether or not there was a transitional change in color tone, more preferably 8 / 10 or more, and even more preferably 10 / 10. In Comparative Example 1, since no restorative artificial teeth were used, the above evaluation was considered equivalent to the evaluation of Test X in the Example. Next, the B1 shade prosthesis (B1-U-1) was placed on the occlusal surface of the B1 shade guide, and the colors were compared. Then, the B1 shade guide and the B1 shade prosthesis (B1-U-1) were placed side by side on a black table, and the colors were compared. The difference (color difference) between the color of the prosthesis when placed on the occlusal surface of the shade guide and the color of the prosthesis when placed side by side on the black table was then checked. Subsequently, the difference in color (color difference) between the A3.5 shade guide and the A3.5 shade prosthesis (A3.5-U-1) was similarly checked visually. Ten dental professionals were asked to observe the color difference at this time and to answer the question, "Does the color of the prosthesis change between when it is adjacent to each shade guide and when it is on the table, and is it a color that is compatible with a wide range of shades?" They were given the following two answer options and asked to choose one. [Y-1: It was determined that the color tone was either compatible with a wide range of color tones or not compatible with a wide range of color tones.] [Y-2: It was not possible to determine whether the color tone was compatible with a wide range of other colors.]

[0142] Regarding the above evaluation items, it is preferable that 6 / 10 or more of the respondents answered [Y-1], indicating that they were able to determine the presence or absence of a color tone that is compatible with a wide range of color tones, more preferably 8 / 10 or more, and even more preferably 10 / 10. In Comparative Example 1, since it lacked a detachable part, the restorative artificial tooth and prosthesis could not be attached or detached. Therefore, the above evaluation was treated as equivalent to Test Y in Example. The evaluation as a demonstration kit was performed in the same manner as in Example 1.

[0143] [Comparative Example 2] Similar to Example 1, restorative artificial teeth in shades B1 and A3.5 were fabricated, respectively. Using a dental etching material (product name "K Etchant GEL," manufactured by Kuraray Noritake Dental Co., Ltd.), etching was performed on the defective areas of the restorative artificial teeth according to the method recommended by the supplier. Next, using dental adhesive (product name "Clearfil® Universal Bond Quick ER," manufactured by Kuraray Noritake Dental Co., Ltd.), bonding was performed on each missing tooth according to the method recommended by the manufacturer, and the area was irradiated for 10 seconds in normal mode using a dental visible light curing unit (product name "PenCure 2000," manufactured by Morita Corporation). After that, dental composite resin 1 was built up on each missing tooth, and the surface shape of the restorative artificial tooth was formed by pressing it with a mold of the restorative artificial tooth that had been previously made using silicone impression material (MemoZil® 2, manufactured by Kulzer Japan), and the area was irradiated for 10 seconds using a dental visible light curing unit (product name "PenCure 2000," manufactured by Morita Manufacturing Co., Ltd.), and then the mold was removed and irradiated for another 10 seconds to obtain a hardened product. The resulting hardened material was polished and buffed in the same manner as in Example 1 to create B1 and A3.5 restoration samples in which the restorative artificial tooth and prosthesis were integrated. Then, Test X was carried out in the same manner as in Example 1. After that, a prosthesis identical in shape to the prosthesis in the B1 sample was fabricated, and the color tone of the prosthesis was checked when it was placed on a black table. The difference (color difference) between that color tone and the color tone of the prosthesis in the B1 sample was then checked. Ten dental professionals were asked to observe the color difference at this time, and for the question in Test Y, "Does the color of the prosthesis change between the color within each restorative artificial tooth and the color on the table, and is it a color that is compatible with a wide range of shades?", they were given the following two answer options and asked to choose one. [Y-1: It was determined that the color tone was either compatible with a wide range of color tones or not compatible with a wide range of color tones.] [Y-2: It was not possible to determine whether the color tone was compatible with a wide range of other colors.]

[0144] Regarding the above evaluation items, it is preferable that 6 / 10 or more of the respondents answered [Y-1] that they were able to determine whether or not there was a color tone that was compatible with a wide range of color tones, more preferably 8 / 10 or more, and even more preferably 10 / 10. In Comparative Example 2, which corresponds to Patent Document 1, it was not possible to attach and detach the restorative artificial tooth and prosthesis, and therefore Test Y could not be evaluated. Thus, the above evaluation was compared with the example, using the evaluation equivalent to Test Y in Example 1. The evaluation as a demonstration kit was performed in the same manner as in Example 1.

[0145] [Comparative Example 3] For restorative purposes, hard resin teeth in shades B1 and A3.5 (product name "GC ZenOpal", molar #6 (size: mandibular 1 form, 4 sizes, PL16), manufactured by GC Corporation) were used as is. Using a dental CAD / CAM machine (product name "DWX-51D", manufactured by Roland DG Corporation), we fabricated B1-sized prostheses (B1-Ur) and A3.5-sized prostheses (A3.5-Ur), both rectangular prisms measuring 4.0 mm in length, 6.0 mm in width, and 3.0 mm in depth, from a dental mill blank (U-1). First, the B1 prosthesis was placed on the occlusal surface of the B1 restorative artificial tooth, and the colors of each were compared to visually confirm the difference in color between the prosthesis and the restorative artificial tooth. Subsequently, the same visual confirmation of the difference in color between the A3.5 restorative artificial tooth and the A3.5 prosthesis was performed. Ten dental professionals were asked to examine this color difference and choose one of two answers to the question, "Was there a transitional change in color at the boundary between the prosthesis and each restorative artificial tooth?" [X-1: It was possible to determine whether the color tone had changed or not.] [X-2: It was not possible to determine whether the color tone was changing transitionally.]

[0146] Regarding the above evaluation items, it is preferable for the kit to be able to judge whether or not there was a transitional change in color tone if 6 / 10 or more people answered [X-1], more preferably if 8 / 10 or more, and even more preferably if 10 / 10. In Comparative Example 3, since the restorative artificial tooth and prosthesis did not have a detachable part, the above evaluation was treated as equivalent to Test X in Example 1.

[0147] Next, the B1 prosthesis was placed on the occlusal surface of the B1 restorative artificial tooth, and the difference in color between them was visually confirmed. Then, the B1 restorative artificial tooth and the B1 prosthesis were placed side by side on a black table, and the difference in color between them was visually confirmed. This process was repeated to check the difference (color difference) between the color of the B1 prosthesis when it was placed on the occlusal surface of the B1 restorative artificial tooth and the color of the B1 prosthesis when it was placed side by side on a black table. Subsequently, the same color difference was checked for the A3.5 restorative artificial tooth and the A3.5 prosthesis. Ten dental professionals were asked to observe the color difference at this time and to select one of the following two answers to the question, "Does the color of the prosthesis change between when it is adjacent to each restorative artificial tooth and when it is on the table, and is it a color that is compatible with a wide range of shades?" [Y-1: It was determined that the color tone was either compatible with a wide range of color tones or not compatible with a wide range of color tones.] [Y-2: It was not possible to determine whether the color tone was compatible with a wide range of other colors.]

[0148] Regarding the above evaluation items, it is preferable for a kit to judge the presence or absence of a color tone that is compatible with a wide range of colors if 6 / 10 or more people answered [Y-1], more preferably if 8 / 10 or more people answered [Y-1], and even more preferably if 10 / 10 people answered [Y-1]. In Comparative Example 3, the restorative artificial tooth and prosthesis did not have a detachable part, and therefore, evaluation of Test Y could not be performed. Thus, the above evaluation was compared with the example, treating it as equivalent to the evaluation of Test Y in Example 1. The evaluation as a demonstration kit was performed in the same manner as in Example 1.

[0149] [Table 2]

[0150] [Table 3]

[0151] [Table 4]

[0152] Tables 2-4 show that many dental professionals were able to understand each evaluation item well using the demonstration kit of the present invention. Therefore, it was found that the present invention is a demonstration kit that enables efficient color determination of dental restorative materials. Furthermore, it was confirmed that the demonstration kit of the present invention is useful for determining whether or not dental restorative materials have color compatibility. Furthermore, as shown in Table 4, in Comparative Example 1, for tests X and Y, the prosthesis and shade guide kit did not allow for the insertion of the prosthesis and the simulation of indirect restoration, making it impossible to determine the color match. As shown in Table 4, in Comparative Example 2, it was impossible to remove the prosthesis and the restorative artificial tooth for Test Y. Therefore, it was not possible to compare the colors without imagining the color of the prosthesis when it was removed, and thus color compatibility could not be judged. As shown in Table 4, in Comparative Example 3, for tests X and Y, the prosthesis and restorative artificial tooth did not have a removable part, making it impossible to insert the prosthesis and perform a simulated indirect restoration. Therefore, it was not possible to compare the color change when the prosthesis was fitted, and thus color compatibility could not be determined.

[0153] As described above, in the examples, it was possible to distinguish between cases with and without color compatibility by using the demonstration kit of the present invention. Therefore, as a variation of the embodiment, it can be inferred that even in an embodiment in which the demonstration kit of the present invention includes two or more prostheses having the same shade but different color tones (for example, different in terms of whether or not they are color-matched), it is possible to evaluate whether one of the prostheses is color-matched and the other is not. [Explanation of Symbols]

[0154] 10. Wall surface of gap or missing part 20 Defective area 30 Restorative artificial teeth

Claims

1. The product includes two or more artificial teeth for restorative purposes that have missing parts, one or more prostheses made of dental restorative materials, and a coating agent. The coating agent is a dental curable composition comprising (1) water, (2) a dental color matching material, or (3) a polymerizable monomer, a polymerization initiator, and a filler, and optionally a coloring agent. The aforementioned dental color matching material comprises a polyhydric alcohol, a filler, and a coloring agent. The content of the aforementioned polyhydric alcohol is 40% by mass or more. The content of the polymerization initiator in the dental curable composition is 1,000 ppm by mass or less, and the content of the polymerizable monomer is 10,000 ppm by mass or less. The missing portion of two or more of the aforementioned restorative artificial teeth is a removable portion (W) from which the prosthesis can be attached and detached. The prosthesis has a detachable portion (Z) on a surface facing the detachable portion (W) that can be attached to the artificial tooth for restoration, The prosthesis has a shape that allows it to be fitted into the attachment portion (W) at the attachment portion (Z), A dental demonstration kit comprising multiple restoration samples, each consisting of a prosthesis and a restorative artificial tooth, which are all different from one another.

2. The dental demonstration kit according to claim 1, wherein the plurality of restoration samples are composed of any of (i), (ii), or (iii) below. (i) Two or more of the restorative artificial teeth have different shades from each other; or (ii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having different shades; or (iii) Two or more of the restorative artificial teeth have the same shade, and the kit includes two or more prostheses having the same color tone.

3. The dental demonstration kit according to claim 2, which satisfies condition (i) or (ii) above, and wherein the shape of the missing portion of the two or more restorative artificial teeth is the same or substantially the same.

4. A dental demonstration kit according to claim 2, which satisfies condition (i) or (iii) above, wherein the shapes of the missing portions of the two or more restorative artificial teeth are different.

5. The dental demonstration kit according to claim 2, which satisfies condition (i) above, wherein the shades of the restorative artificial teeth are two or more selected from the group consisting of A1, A2, A3, A3.5, A4, B1, B2, B3, B4, C1, C2, C3, C4, D2, D3, and D4.

6. The dental demonstration kit according to claim 1, wherein the transparency of the coating agent is ΔL10 or greater.

7. The dental demonstration kit according to claim 1, wherein the L*a*b* color system of the dental color matching material is within the following range. L* / w=70.0~110.0, a* / w=-5.0~15.0, and b* / w=-5.0~40.0

8. A dental demonstration kit according to claim 1, comprising only a restorative artificial tooth having the detachable portion (W) and a prosthesis having the detachable portion (Z).

9. The dental demonstration kit according to claim 1, wherein the dental restorative material is a dental mill blank or a dental composite resin.

10. The dental demonstration kit according to claim 1, wherein the missing portion of the reconstructive artificial tooth is a Class II cavity.

11. A method for evaluating the color of dental restorative materials, In the dental demonstration kit described in claim 1, A step of preparing a first restoration sample by fitting together the detachable portion (W-1) of the first restorative artificial tooth and the detachable portion (Z) of the prosthesis, Steps to remove the prosthesis from the first restoration sample, A step of preparing a second restoration sample by fitting together the detachable portion (W-2) of the second restorative artificial tooth with the detachable portion (Z) of the prosthesis, and This includes a step of comparing the color of the first restoration sample with the color of the second restoration sample. The detachable part (W-1) and the detachable part (Z), and / or the detachable part (W-2) and the detachable part (Z), are fitted together via a coating agent. The coating agent is a dental curable composition comprising (1) water, (2) a dental color matching material, or (3) a polymerizable monomer, a polymerization initiator, and a filler, and optionally a coloring agent. The aforementioned dental color matching material comprises a polyhydric alcohol, a filler, and a coloring agent. The content of the aforementioned polyhydric alcohol is 40% by mass or more. The content of the polymerization initiator in the dental curable composition is 1,000 ppm by mass or less, and the content of the polymerizable monomer is 10,000 ppm by mass or less. Methods for evaluating the color of dental restorative materials.

12. The evaluation method according to claim 11, wherein two or more of the restorative artificial teeth in the dental demonstration kit have different shades from each other.

13. The evaluation method according to claim 11 or 12, wherein the detachable part (W-1) and the detachable part (Z), and / or the detachable part (W-2) and the detachable part (Z), are fitted together via a coating agent.

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