Dental compatibility test material composition

Abstract

To provide a fit checking material composition for dental use which facilitates checking of a fitting state.SOLUTION: Provided is a fit checking material composition for dental use containing a first paste and a second paste, wherein the consistency at 23°C of the mixed product 35 seconds after mixing the first paste and the second paste is 37 to 43 mm.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a dental compatibility test material composition. [Background technology]

[0002] Fit test materials are widely used in dental treatment. They are applied to the inner surface of a dental prosthesis, which is then placed in the oral cavity where the prosthesis will be fitted, and then removed. If there is poor contact between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa, the inner surface of the dental prosthesis will be in strong contact with the abutment tooth or oral mucosa in some areas, resulting in a thinner film of fit test material on the inner surface of the dental prosthesis than in other areas. By polishing the areas where the fit test material is thinner, the partial fit of the dental prosthesis can be improved.

[0003] Patent Document 1 discloses a paste for examining overpressure areas of a denture base, which is composed of polydiorganosiloxane, a pigment, and a water-soluble polymer powder (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 2650060 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional dental compatibility test materials have a problem in terms of ease of checking compatibility.

[0006] An object of the present invention is to provide a dental compatibility test material that makes it easy to confirm compatibility. [Means for solving the problem]

[0007] One aspect of the present invention is a dental compatibility test material composition comprising a first paste and a second paste, Mix for 20 seconds at 23±1°C, and then start mixing.The consistency of the kneaded product at 23°C after 35 seconds is 37 mm or more and 43 mm or less. and contains an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons per molecule, an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to silicon atoms per molecule, a silicone-soluble platinum compound, and an inorganic filler. A dental compatibility test material composition. [Effects of the Invention]

[0008] According to one aspect of the present invention, a dental compatibility test material that makes it easy to confirm compatibility can be provided. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described.

[0010] The dental compatibility test material composition of this embodiment includes a first paste and a second paste. In this specification, the dental compatibility test material refers to a material for measuring the compatibility of the inner surface of a dental prosthesis with an abutment tooth or the oral mucosa.

[0011] The first paste can function as a catalyst paste in the dental compatibility test material composition. The second paste can function as a base paste in the dental compatibility test material composition. The dental compatibility test material composition of this embodiment is obtained as a kneaded product by kneading the first paste and the second paste.

[0012] The blending ratio of the first paste and the second paste is optional, but for example, in the dental compatibility test material composition, the mass ratio is 8:2 to 2:8, preferably 7:3 to 3:7, and more preferably 6:4 to 4:6.

[0013] In the dental compatibility test material composition of this embodiment, the consistency of the kneaded product obtained by kneading the first paste and the second paste is 37 mm or more and 43 mm or less, preferably 38 mm or more and 42 mm or less, and more preferably 38 mm or more and 41 mm or less. Here, the consistency refers to the consistency of the kneaded product at 23°C 35 seconds after kneading the first paste and the second paste.

[0014] In the dental compatibility test material composition of this embodiment, the consistency of the kneaded product of the first paste and the second paste is 37 mm or more and 43 mm or less, so that the kneaded product can be prevented from easily flowing on the inner surface of the dental prosthesis. Therefore, the dental compatibility test material composition of this embodiment allows the kneaded product to spread evenly between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa, making it easier to confirm the compatibility.

[0015] Furthermore, in the dental compatibility test material composition of this embodiment, the consistency of the kneaded product of the first paste and the second paste is 37 mm or more and 43 mm or less, which can suppress a decrease in the extrusion property of the kneaded product using a dispenser or the like and a poor kneading feel of the paste. Therefore, the dental compatibility test material composition of this embodiment is easy to handle.

[0016] The viscosity of each of the first paste and the second paste before mixing is preferably 20,000 mPa·s or more and 60,000 mPa·s or less, more preferably 21,000 mPa·s or more and 55,000 mPa·s or less, and even more preferably 22,000 mPa·s or more and 50,000 mPa·s or less. In this specification, viscosity refers to the viscosity at 23°C at a shear rate of 100 (1 / sec).

[0017] In the dental compatibility test material composition of this embodiment, the viscosity of the first paste and the second paste before kneading is 20,000 mPa·s or more and 60,000 mPa·s or less, which further prevents the kneaded material from easily flowing on the inner surface of the dental prosthesis. Therefore, the dental compatibility test material composition of this embodiment makes it easier for the kneaded material to spread evenly between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa, making it easier to check the compatibility of the inner surface of the dental prosthesis.

[0018] Furthermore, in the dental compatibility test material composition of this embodiment, the viscosity of the first paste and the second paste before mixing is 20,000 mPa·s or more and 60,000 mPa·s or less, so that the mixed mixture that has hardened on the inner surface of the dental prosthesis is less likely to tear when peeled off. Therefore, the dental compatibility test material composition of this embodiment makes it easy to remove the mixed mixture from the inner surface of the dental prosthesis after confirming the compatibility of the inner surface of the dental prosthesis.

[0019] The composition of the dental compatibility test material composition according to this embodiment is not particularly limited, but may be, for example, an addition type silicone composition, which contains a silicone composition different from a condensation type silicone composition.

[0020] The addition type silicone composition is not particularly limited, but includes, for example, an organopolysiloxane, an organohydrogenpolysiloxane, a silicone-soluble platinum compound, and an inorganic filler.

[0021] [Organopolysiloxane] The organopolysiloxane is not particularly limited, but is preferably an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups in one molecule, and more preferably an organopolysiloxane having an alkenyl group.

[0022] The organopolysiloxane having an alkenyl group has the average composition formula R 1 a SiO (4-a) / 2 (In the formula, R 1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, preferably 1 to 8 carbon atoms, a is 1.95 to 2.05, preferably 2.00 to 2.02, and a R 1 Of these, 0.0001 to 20 mol %, preferably 0.001 to 10 mol %, and more preferably 0.01 to 5 mol % are alkenyl groups having 2 to 8 carbon atoms, preferably 2 to 6 carbon atoms.) It is preferable that the formula be represented by the following formula:

[0023] where R 1Examples of the monovalent hydrocarbon group in the formula (I) include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, cyclohexyl, octyl, nonyl, and decyl; aryl groups such as phenyl, tolyl, xylyl, and naphthyl; aralkyl groups such as benzyl, phenylethyl, and phenylpropyl; and alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, hexenyl, cyclohexenyl, and octenyl.

[0024] R 1 Examples of the substituent in include a halogen atom such as a fluorine atom, a bromine atom, or a chlorine atom, and a cyano group.

[0025] Examples of the alkyl group substituted with a substituent include a chloromethyl group, a chloropropyl group, a bromoethyl group, a trifluoropropyl group, and a cyanoethyl group.

[0026] The alkenyl group may be bonded to a terminal silicon atom or to a silicon atom other than the terminal silicon atom, but is preferably bonded to silicon atoms at both terminals.

[0027] R other than alkenyl group 1 is preferably a methyl group or a phenyl group.

[0028] Here, the organopolysiloxane having an alkenyl group is an organopolysiloxane having an M unit (RSiO 1 / 2 ) and D units (R2SiO), but T units (RSiO 3 / 2 ) may further comprise.

[0029] The organopolysiloxane having an alkenyl group may be either a homopolymer or a copolymer.

[0030] Examples of organopolysiloxanes having alkenyl groups include dimethylpolysiloxanes end-blocked at both ends with vinyldimethylsiloxy groups, dimethylpolysiloxanes end-blocked at both ends with methyldivinylsiloxy groups, dimethylsiloxane (80 mol%)-methylphenylsiloxane (20 mol%) copolymers end-blocked at both ends with vinyldimethylsiloxy groups, dimethylsiloxane (80 mol%)-diphenylsiloxane (20 mol%) copolymers end-blocked at both ends with vinyldimethylsiloxy groups, dimethylsiloxane (90 mol%)-diphenylsiloxane (10 mol%) copolymers end-blocked at both ends with vinyldimethylsiloxy groups, and dimethylsiloxane-vinylmethylsiloxane copolymers end-blocked at both ends with trimethylsiloxy groups.

[0031] Two or more types of organopolysiloxanes having alkenyl groups may be used in combination.

[0032] Among these, the alkenyl group-containing organopolysiloxane is preferably a dimethylpolysiloxane in which both ends are blocked with vinyldimethylsiloxy groups.

[0033] The viscosity of the organopolysiloxane (viscosity at 23°C at a shear rate of 100 (1 / sec)) is preferably 7,500 mPa·s or more and 16,000 mPa·s or less, more preferably 8,000 mPa·s or more and 15,500 mPa·s or less, and even more preferably 8,500 mPa·s or more and 15,000 mPa·s or less.

[0034] When the viscosity of the organopolysiloxane is 7,500 mPa·s or more and 16,000 mPa·s or less, the viscosity of each of the first paste and the second paste before mixing can be adjusted to 20,000 mPa·s or more and 60,000 mPa·s or less. This makes it possible to provide a dental compatibility test material composition that facilitates checking the compatibility of the inner surface of a dental prosthesis and allows the mixed material to be easily removed from the inner surface of the dental prosthesis after checking the compatibility of the inner surface of the dental prosthesis.

[0035] The content of organopolysiloxane in the dental compatibility test material composition is arbitrary, but is, for example, 45% by mass or more and 80% by mass or less, preferably 50% by mass or more and 75% by mass or less, and more preferably 55% by mass or more and 70% by mass or less.

[0036] The organopolysiloxane is preferably contained in both the first paste and the second paste. In this case, the organopolysiloxane is composed of a first component contained in the first paste and a second component contained in the second paste, and the content of the first component in the first paste is preferably 30% by mass or more and 50% by mass or less, more preferably 35% by mass or more and 48% by mass or less, and even more preferably 40% by mass or more and 45% by mass or less.

[0037] The content of the second component in the second paste of organopolysiloxane is preferably 50% by mass or more and 95% by mass or less, more preferably 60% by mass or more and 93% by mass or less, and even more preferably 70% by mass or more and 90% by mass or less.

[0038] Furthermore, in the dental compatibility test material composition containing the first paste and the second paste, the organopolysiloxane preferably has a mass ratio of the second component to the first component of 1.1 or more, more preferably 1.3 or more, and even more preferably 1.4 or more.

[0039] The upper limit of the mass ratio of the second component to the first component is not particularly limited, but from the viewpoint of hardening the mixture of the first paste and the second paste to an extent that it can function as a dental compatibility test material, the mass ratio of the second component to the first component may be 2.1 or less.

[0040] [Organohydrogenpolysiloxane] The organohydrogenpolysiloxane undergoes a hydrosilylation reaction with the organopolysiloxane having an aliphatic unsaturated hydrocarbon, thereby hardening the dental compatibility test material composition. The organohydrogenpolysiloxane is not particularly limited, but is preferably an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to silicon atoms in one molecule.

[0041] Organohydrogenpolysiloxane has the average composition formula R 2 b H c SiO (4-b-c) / 2 (In the formula, R 2 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, b is 0.7 to 2.1, c is 0.001 to 1.0, and b+c is 0.8 to 3.0. It is preferable that the formula be represented by the following formula:

[0042] The number of hydrosilyl groups contained in the organohydrogenpolysiloxane is preferably 2 to 300, more preferably 3 to 200, and even more preferably 4 to 100.

[0043] where R 2 represents R in organopolysiloxane having alkenyl groups. 1 However, it is preferable that the copolymer does not have an aliphatic unsaturated bond.

[0044] Examples of organohydrogenpolysiloxanes include 1,1,3,3-tetramethyldisiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane, methylhydrogencyclopolysiloxane, methylhydrogensiloxane-dimethylsiloxane cyclic copolymer, tris(dimethylhydrogensiloxy)methylsilane, tris(dimethylhydrogensiloxy)phenylsilane, methylhydrogenpolysiloxanes both ends of which are blocked with trimethylsiloxy groups, dimethylsiloxane-methylhydrogensiloxane copolymers both ends of which are blocked with trimethylsiloxy groups, Dimethylpolysiloxane end-blocked with dimethylhydrogensiloxy groups, dimethylsiloxane-methylhydrogensiloxane copolymer end-blocked with dimethylhydrogensiloxy groups, methylhydrogenpolysiloxane end-blocked with dimethylhydrogensiloxy groups, methylhydrogensiloxane-diphenylsiloxane copolymer end-blocked with trimethylsiloxy groups, methylhydrogensiloxane-diphenylsiloxane-dimethylsiloxane copolymer end-blocked with trimethylsiloxy groups, (CH3)2HSiO 1 / 2 Units and SiO 4 / 2 A copolymer consisting of (CH3)2HSiO units 1 / 2 Units and SiO 4 / 2 Units and (C6H5)SiO 3 / 2 Copolymers having units are also examples.

[0045] The organohydrogenpolysiloxane may be linear, cyclic, or branched.

[0046] The number of silicon atoms contained in the organohydrogenpolysiloxane is preferably 2 to 1,000, more preferably 3 to 300, and even more preferably 4 to 100.

[0047] Two or more types of organohydrogenpolysiloxanes may be used in combination.

[0048] Of these, organohydrogenpolysiloxanes are preferably those having at least three hydrogen atoms directly bonded to silicon atoms per molecule, and more preferably dimethylsiloxane-methylhydrogensiloxane copolymers in which both ends are blocked with trimethylsiloxy groups.

[0049] The organohydrogenpolysiloxane preferably has a content of hydrogen atoms bonded to silicon atoms of 20% by mass or more and 80% by mass or less, more preferably 25% by mass or more and 70% by mass or less, and even more preferably 30% by mass or more and 60% by mass or less.

[0050] The viscosity of the organohydrogenpolysiloxane (viscosity at 23°C at a shear rate of 100 (1 / sec)) is preferably from 5 mPa·s to 500 mPa·s, more preferably from 5 mPa·s to 300 mPa·s, and even more preferably from 5 mPa·s to 200 mPa·s.

[0051] The content of organohydrogenpolysiloxane in the dental compatibility test material composition is arbitrary, but may be, for example, 0.1% by mass or more and 10% by mass or less, preferably 1% by mass or more and 8% by mass or less, and more preferably 2% by mass or more and 5% by mass or less.

[0052] The organohydrogenpolysiloxane is preferably contained in the second paste, in which case the content of the organohydrogenpolysiloxane in the second paste is preferably from 1 to 20% by mass, more preferably from 2 to 15% by mass, and even more preferably from 3 to 10% by mass.

[0053] When the organopolysiloxane is an organopolysiloxane having alkenyl groups, the molar ratio of hydrosilyl groups in the organohydrogenpolysiloxane to alkenyl groups in the organopolysiloxane having alkenyl groups is preferably 0.1 to 4.0.

[0054] [Silicone-soluble platinum compound] Silicone-soluble platinum compounds are hydrosilylation catalysts.

[0055] Examples of the hydrosilylation catalyst include platinum-based catalysts such as platinum black, platinic chloride, chloroplatinic acid, reaction products of chloroplatinic acid with monohydric alcohols, complexes of chloroplatinic acid with olefins, and platinum group metal catalysts such as platinum bisacetoacetate, palladium-based catalysts, and rhodium-based catalysts.

[0056] Two or more hydrosilylation catalysts may be used in combination.

[0057] The content of the silicone-soluble platinum compound in the dental compatibility test material composition is arbitrary, but is, for example, 0.01% by mass or more and 10% by mass or less, preferably 0.1% by mass or more and 8% by mass or less, and more preferably 0.1% by mass or more and 5% by mass or less.

[0058] The silicone-soluble platinum compound is preferably contained in the first paste, and in this case, the content of the silicone-soluble platinum compound in the first paste is preferably 0.05% by mass to 10% by mass, more preferably 0.1% by mass to 15% by mass, and even more preferably 0.1% by mass to 10% by mass.

[0059] [Inorganic filler] The inorganic filler is not particularly limited, and examples thereof include fumed silica particles, wet silica particles, crystalline silica particles, carbon black, red iron oxide particles, cerium oxide particles, titanium oxide particles, calcium carbonate particles, aluminum hydroxide particles, and titanate ester particles.

[0060] Two or more inorganic fillers may be used in combination.

[0061] The content of inorganic filler in the dental compatibility test material composition is arbitrary, but is, for example, 10% by mass or more and 70% by mass or less, preferably 15% by mass or more and 60% by mass or less, and more preferably 20% by mass or more and 50% by mass or less.

[0062] The inorganic filler is preferably contained in both the first paste and the second paste. In this case, the content of the inorganic filler in the first paste is preferably 1% by mass to 70% by mass, more preferably 3% by mass to 70% by mass, and even more preferably 5% by mass to 70% by mass. The content of the inorganic filler in the second paste is preferably 1% by mass to 70% by mass, more preferably 3% by mass to 60% by mass, and even more preferably 5% by mass to 50% by mass.

[0063] The dental compatibility test material composition according to this embodiment may further contain various silicone resins, silicone oils, nonionic surfactants, pigments, etc., within the range that does not impair its properties.

[0064] [Silicone oil] The silicone oil is not particularly limited, but examples thereof include methylphenylpolysiloxane and dimethylpolysiloxane.

[0065] The content of silicone oil in the dental compatibility test material composition is arbitrary, but may be, for example, 0.1% by mass or more and 20% by mass or less, preferably 0.3% by mass or more and 15% by mass or less, and more preferably 0.5% by mass or more and 10% by mass or less.

[0066] The silicone oil is preferably contained in the first paste, and in this case, the content of the silicone oil in the first paste is preferably 0.1% by mass or more and 25% by mass or less, more preferably 0.5% by mass or more and 20% by mass or less, and even more preferably 1% by mass or more and 15% by mass or less.

[0067] [Nonionic surfactants] A nonionic surfactant can be added as desired, but is preferably added in order to improve the hydrophilicity of the mixture of the first paste and the second paste, and to make it easier for the mixture to spread evenly between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa.

[0068] The nonionic surfactant is not particularly limited, but examples thereof include silicone surfactants, hydrocarbon surfactants (e.g., polyoxyethylene alkyl ethers), fluorocarbon surfactants, polyethylene glycol-polypropylene glycol block copolymers, etc. Among these, silicone surfactants and hydrocarbon surfactants are preferred as nonionic surfactants.

[0069] Commercially available silicone surfactants include, for example, KF-351A, KF945, KF640, KF642, KF643, and KF644 (all manufactured by Shin-Etsu Chemical Co., Ltd.).

[0070] Commercially available hydrocarbon surfactants include, for example, Naroacty (registered trademark) CL40, CL50, CL70, and CL90, and Sannonic (registered trademark) SS30, SS50, SS70, and SS90 (all manufactured by Sanyo Chemical Industries, Ltd.).

[0071] Two or more types of nonionic surfactants may be used in combination.

[0072] The content of the nonionic surfactant in the dental compatibility test material composition is arbitrary, but may be, for example, 0.01% by mass or more and 3% by mass or less, preferably 0.1% by mass or more and 2% by mass or less, and more preferably 0.1% by mass or more and 1% by mass or less.

[0073] The nonionic surfactant is preferably contained in the second paste, and in this case, the content of the nonionic surfactant in the second paste is preferably 0.1% by mass or more and 5% by mass or less, more preferably 0.1% by mass or more and 3% by mass or less, and even more preferably 0.5% by mass or more and 2% by mass or less.

[0074] [Pigment] The pigment is not particularly limited, but a white pigment is preferably used. Examples of the white pigment include titanium oxide, aluminum oxide, zirconium oxide, a mixture of titanium oxide and vinyl polysiloxane, a mixture of titanium oxide, aluminum oxide and vinyl polysiloxane, and a mixture of zirconium oxide and vinyl polysiloxane. These white pigments are blended into the dental compatibility test material composition as a pigment paste.

[0075] Two or more pigments may be used in combination.

[0076] The content of pigment in the dental compatibility test material composition is arbitrary, but may be, for example, 0.01% by mass or more and 3% by mass or less, preferably 0.1% by mass or more and 2% by mass or less, and more preferably 0.5% by mass or more and 1.5% by mass or less.

[0077] The pigment is preferably contained in the first paste, and in this case, the content of the pigment in the first paste is preferably 0.1% by mass to 10% by mass, more preferably 0.5% by mass to 5% by mass, and even more preferably 1% by mass to 3% by mass.

[0078] The use of such pigments makes it easy to visually check a wide range of thickness differences, and in particular makes it easy to visually check the compatibility of dental prostheses made of ceramics.

[0079] As described above, the dental compatibility test material composition of this embodiment contains an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons per molecule, an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to silicon atoms per molecule, a silicone-soluble platinum compound, and an inorganic filler.

[0080] As a result, the dental compatibility test material composition of this embodiment can adjust the consistency of the kneaded product at 23°C 35 seconds after kneading the first paste and the second paste to 37 mm or more and 43 mm or less. Therefore, according to this embodiment, it is possible to provide a dental compatibility test material composition that is easy to handle because the kneaded product spreads evenly between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa, making it easy to check compatibility and suppressing a decrease in the extrusion ability of the kneaded product and poor kneading feel of the paste.

[0081] Furthermore, the viscosity of the dental compatibility test material composition of this embodiment at 23°C at a shear rate of 100 (1 / sec) can be adjusted to 20,000 mPa·s or more and 60,000 mPa·s or less for both the first paste and the second paste. Therefore, the dental compatibility test material composition of this embodiment can provide a dental compatibility test material composition that makes it easy to confirm the compatibility of the inner surface of a dental prosthesis and that allows the kneaded material to be easily removed from the inner surface of the dental prosthesis after the compatibility has been confirmed.

[0082] Furthermore, as described above, the dental compatibility test material composition of this embodiment preferably comprises an organopolysiloxane comprising a first component contained in the first paste and a second component contained in the second paste, and the mass ratio of the second component to the first component is 1.1 or more. This allows the dental compatibility test material composition of this embodiment to spread more uniformly as a kneaded mixture between the inner surface of the dental prosthesis and the abutment tooth or oral mucosa, making it easier to confirm the compatibility of the inner surface of the dental prosthesis.

[0083] [Method of using dental compatibility test material composition] The dental compatibility test material composition of this embodiment is preferably used as a two-component composition in which the silicone-soluble platinum compound and the organohydrogenpolysiloxane are separated.

[0084] As an example, a mixture of a first agent (first paste) containing a silicone-soluble platinum compound and a second agent (second paste) containing an organohydrogenpolysiloxane is applied to the inner surface of a dental prosthesis, and the dental prosthesis is then attached to an abutment tooth or oral mucosa and left at room temperature or heated to 50 to 200°C. [Example]

[0085] Examples of the present invention will be described below, but the present invention is not limited to these examples. In the following, numerical values ​​without units or "parts" are based on mass (% by mass) unless otherwise specified.

[0086] (Examples 1 to 6, Comparative Examples 1 to 5) The first and second pastes were prepared in the amounts [parts by mass] shown in Table 1, and the first and second pastes were mixed in a 1:1 ratio to prepare dental compatibility test materials, which were then evaluated. The preparation conditions and evaluation results are shown in Table 1.

[0087] The details of each component in Table 1 are as follows:

[0088] Methylphenylpolysiloxane: KF50-100cs (Shin-Etsu Silicone Co., Ltd.) Crystalline silica: Crystallite (registered trademark) VX-S (manufactured by Tatsumori Co., Ltd.) Fusible silica: Fuslex E2 (Tatsumori Co., Ltd.) Hydrophobic fumed silica: Aerosil (registered trademark) RX-200 (Aerosil RX-200 (manufactured by Nippon Aerosil Co., Ltd.) Polyoxyethylene alkyl ether: Naroacty (registered trademark) CL-40 (manufactured by Sanyo Chemical Industries, Ltd.)

[0089] <Viscosity test> A viscometer (RE-85U, manufactured by Toki Sangyo Co., Ltd.) was used for the test. Measurements were carried out using constant temperature water at 23°C. The cone rotor number used for evaluation was 3° x R7.7. Measurements were carried out at a shear rate of 100 (1 / sec).

[0090] <Consistency test> The consistency was measured according to JIS T 6513-2019, with the mixing time set to 20 seconds and the load applied 35 seconds after the start of mixing. The measurement environment was a room temperature of 23±1°C and a humidity of 50±10%.

[0091] <Conformity test> An impression of the upper jaw was taken and a plaster model was made. A self-polymerizing resin (Unifast Lab Type B No. 8 Live Pink, manufactured by GC Corporation) was applied to the plaster model so as to cover the palate, creating a false denture. The fitting test materials of the examples and comparative examples were then applied to the false denture and pressed against the palate of the plaster model.

[0092] However, to simulate the wetness of the oral cavity, the plaster cast was immersed in water before pressing. Finally, the fitting test material was allowed to harden, then removed and evaluated. The areas where the color of the false denture was visible were determined to be the areas in contact.

[0093] The evaluation criteria for the compatibility test are as follows: A and B are evaluated as good, and C is evaluated as bad. A. When only the contact site is properly detected B. When areas other than the contact area are also slightly thinner C. When the contact site cannot be detected properly

[0094] <Removability test> After the compatibility test, the hardened kneaded material was removed and its removability was evaluated. The evaluation criteria are as follows. A and B were evaluated as good, and C was evaluated as bad. A: It was removed in one piece and there were no chips. B: The piece was removed in one piece, but there was a small chip. C. If it cannot be removed in one piece, or if it can be removed, it breaks into pieces in places.

[0095] <Wettability test> A contact angle meter (DM-501, manufactured by Kyowa Interface Science Co., Ltd.) was used for the test, and distilled water was used as the measurement solution. Distilled water was dropped onto the kneaded product 3 minutes after the end of kneading. In this test, the contact angle was measured 30 seconds after the drop. The lower the contact angle, the higher the wettability (higher hydrophilicity) was evaluated.

[0096] <Extrusion test> The extrusion from the 5 mm diameter tube and the extrusion from the cartridge dispenser were evaluated sensorily. The evaluation criteria are as follows: A and B were evaluated as good, and C was evaluated as bad. A: Even those with weak grip strength can push it out very easily. B. Easy to push out even for those with weak grip strength C. Heavy extrusion

[0097] [Table 1]

[0098] As can be seen from Table 1, compositions in which the consistency of the kneaded product at 23°C 35 seconds after mixing the first paste and the second paste was 37 mm or more and 43 mm or less, and the viscosity at 23°C at a shear rate of 100 (1 / sec) was 20,000 mPa·s or more and 60,000 mPa·s or less for both the first paste and the second paste, showed good results in the compatibility test, removability test, and extrusion test, and were highly hydrophilic (Examples 1 to 6).

[0099] In contrast, compositions that did not satisfy the condition that the consistency of the kneaded product at 23°C 35 seconds after kneading the first paste and the second paste was 37 mm or more and 43 mm or less, and / or the condition that both the first paste and the second paste were 20,000 mPa·s or more and 60,000 mPa·s or less, showed poor results in at least one of the compatibility test, removability test, and extrusion test (Comparative Examples 1 to 5).

[0100] Among these, the compositions with a viscosity of less than 20,000 mPa·s for both the first paste and the second paste were found to have low hydrophilicity (Comparative Examples 1 and 2).

[0101] Although the embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

Claims

1. A dental compatibility test material composition comprising a first paste and a second paste, The first paste and the second paste are kneaded at 23 ± 1 ° C. for 20 seconds, and the consistency of the kneaded product at 23 ° C. 35 seconds after the start of kneading is 37 mm or more and 43 mm or less, The composition contains an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons per molecule, an organohydrogenpolysiloxane having at least three hydrogen atoms directly bonded to silicon atoms per molecule, a silicone-soluble platinum compound, and an inorganic filler. Dental compatibility test material composition.

2. The viscosity at 23°C at a shear rate of 100 (1 / sec) of both the first paste and the second paste is 20,000 mPa·s or more and 60,000 mPa·s or less. The dental compatibility test material composition according to claim 1 .

3. the organopolysiloxane comprises a first component contained in the first paste and a second component contained in the second paste, The mass ratio of the second component to the first component is 1.1 or more. The dental compatibility test material composition according to claim 1 or 2.

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