WO2011121966A1 - 1液型の歯科用接着材組成物 - Google Patents
1液型の歯科用接着材組成物 Download PDFInfo
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- WO2011121966A1 WO2011121966A1 PCT/JP2011/001792 JP2011001792W WO2011121966A1 WO 2011121966 A1 WO2011121966 A1 WO 2011121966A1 JP 2011001792 W JP2011001792 W JP 2011001792W WO 2011121966 A1 WO2011121966 A1 WO 2011121966A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
- A61K6/62—Photochemical radical initiators
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
Definitions
- the present invention relates to a composition containing a polymerizable monomer used as a one-pack type dental adhesive. More specifically, the present invention relates to a one-pack type dental adhesive composition used for bonding dental materials and dental restorative materials such as a dental composite resin, a dental compomer, and a dental resin cement.
- a dental adhesive When filling a dental restoration with a restoration, a dental adhesive is usually used.
- a dental adhesive When such a dental adhesive is applied to dentin, especially dentin, the decalcification action dissolves the dentin surface with an acidic component, and the penetration action penetrates the monomer component into the dentin collagen layer. It is important that the monomer component that has penetrated solidifies and forms a hybrid layer with collagen (hereinafter sometimes referred to as a “resin-impregnated layer”).
- Patent Document 1 discloses an aromatic third monomer having a hydrophobic acidic group, a water-soluble polymerizable monomer, water, a photopolymerization initiator, and an electron-withdrawing group. Characterized in that it comprises a primary amine, a crosslinkable polymerizable monomer, and a basic compound that should react with a part of the hydrophobic acidic group-containing polymerizable monomer to form a water-soluble salt.
- a one-part dental adhesive composition is described. According to this, it is said that a high adhesiveness can be expressed without performing a pretreatment on the tooth and a composition excellent in storage stability can be obtained.
- this dental adhesive composition is excellent in initial adhesiveness, the adhesive layer and the resin-impregnated layer may deteriorate due to water absorption, and there is room for improvement in long-term adhesion durability.
- Patent Document 2 discloses an adhesive composition for biomaterials containing a polymerizable monomer having a fluorocarbon group. This document describes that a cured product obtained by polymerizing a polymerizable monomer having a fluorocarbon group is excellent in water absorption and dimensional stability. Furthermore, a mixed composition of a polymer powder obtained by polymerizing a polymerizable monomer having a fluorocarbon group, a polymerizable monomer having a fluorocarbon group, a polymerizable monomer having an acidic group, and a polymerization initiator is There is also a description that it is excellent in adhesiveness.
- Patent Document 3 discloses a polymerizable monomer having a fluorocarbon group and two or more polymerizable groups, and a hydrophilic polymerizable property.
- a composition comprising a monomer and a polymerization initiator is disclosed. According to this document, this composition can be polymerized and cured in a short period of time, and exhibits excellent water repellency and coloration resistance, but is well-familiar with the tooth substance and adhesive, and obtains excellent adhesiveness. It is described that it can.
- the present invention provides a one-component dental adhesive that exhibits excellent adhesion and adhesion durability to dentin (particularly dentin), has high environmental light stability, and is uniformly mixed with each component.
- An object is to provide a composition.
- the present invention includes a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the following general formula (1), water (C), and a polymerization initiator ( D), and the content of the polymerizable monomer (A) having an acidic group is 5.5 to 35 parts by weight out of 100 parts by weight of the total amount of the polymerizable monomers. It is an adhesive material composition.
- R 1 represents a hydrogen atom or a methyl group
- Rf represents a fluoroalkyl group having 1 to 20 carbon atoms.
- the content of the polymerizable monomer (B) having a fluorocarbon group is preferably 0.5 to 10 parts by weight out of 100 parts by weight of the total amount of polymerizable monomers.
- the one-component dental adhesive composition of the present invention comprises a polymerizable monomer (E) containing one polymerizable group and one or more hydroxyl groups within 100 parts by weight of the total amount of polymerizable monomers. It is preferable to further contain 10 to 50 parts by weight.
- the one-pack type dental adhesive composition of the present invention further contains a polymerizable monomer (F) containing two polymerizable groups and two hydroxyl groups represented by the following general formula (2). Is preferred.
- the content of the polymerizable monomer (F) is preferably 5 to 20 parts by weight out of 100 parts by weight of the total amount of the polymerizable monomers.
- R 2 and R 3 each independently represent a hydrogen atom or a methyl group, and n represents an integer of 1 to 5.
- the one-pack type dental adhesive composition of the present invention has a crosslinkable property other than the polymerizable monomer (F) containing two polymerizable groups and two hydroxyl groups represented by the general formula (2).
- the polymerizable monomer (G) is preferably further contained in an amount of 20 to 60 parts by weight out of 100 parts by weight of the total amount of the polymerizable monomers.
- the content of the polymerization initiator (D) is preferably 0.001 to 20 parts by weight with respect to 100 parts by weight of the total amount of polymerizable monomers.
- the polymerization initiator (D) is preferably a bisacylphosphine oxide represented by the following general formula (3).
- R 4 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an acyl group or an acyloxy group
- R 5 to R 14 each independently represents a hydrogen atom, a halogen atom, Represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an acyl group, or an acyloxy group.
- the one-component dental adhesive composition of the present invention preferably contains an organic solvent (H).
- the one-pack type dental adhesive composition of the present invention preferably contains a polymerization accelerator (I).
- the one-component dental adhesive composition of the present invention preferably contains a filler (J).
- a one-component dental adhesive composition having high environmental light stability can be obtained. Accordingly, when the dental adhesive composition of the present invention is used, it is possible to sufficiently ensure the operation allowance time and the tooth treatment time required for decalcification and penetration.
- the dental adhesive composition of the present invention exhibits excellent adhesiveness and adhesion durability to a tooth (particularly dentin), and is useful for adhesion between a tooth and a dental restorative material. Furthermore, since each component is uniformly mixed, the dental composition of this invention does not require the operation of mixing each component uniformly at the time of use, so it can be used easily.
- the one-component dental adhesive composition of the present invention includes a polymerizable monomer (A) having an acidic group, a polymerizable monomer (B) having a fluorocarbon group represented by the general formula (1), Water (C) and a polymerization initiator (D) are contained as essential components. First, these essential components will be described.
- Polymerizable monomer having acidic group (A)
- the polymerizable monomer (A) having an acidic group has an acid etching effect and a primer treatment effect, and is a component that imparts a decalcifying action and a penetrating action to the composition.
- the polymerizable monomer (A) having an acidic group can be polymerized and imparts a curing action.
- the composition contains the polymerizable monomer (A) having an acidic group, it can function as a one-pack type dental adhesive, and adhesion to the tooth and adhesion durability are improved.
- the polymerizable monomer (A) having an acidic group can be used alone or in combination of two or more.
- the polymerizable monomer (A) having an acidic group is not particularly limited, but a monofunctional polymerizable monomer having one carboxyl group or its acid anhydride group in the molecule, and a plurality of monomers in the molecule.
- Monofunctional polymerizable monomer having a carboxyl group or an acid anhydride group thereof, monofunctional polymerizable monomer having a phosphinyl group or phosphono group in the molecule referred to as a monofunctional radical polymerizable phosphate ester
- Examples of monofunctional polymerizable monomers having one carboxyl group or acid anhydride group in the molecule include (meth) acrylic acid, N- (meth) acryloylglycine, N- (meth) acryloyl asparagine Acid, 2- (meth) acryloyloxyethyl hydrogen succinate, 2- (meth) acryloyloxyethyl hydrogen phthalate, 2- (meth) acryloyloxyethyl hydrogen maleate, O- (meth) acryloyl tyrosine, N- ( (Meth) acryloyl tyrosine, N- (meth) acryloylphenylalanine, N- (meth) acryloyl-p-aminobenzoic acid, N- (meth) acryloyl-o-aminobenzoic acid, p-vinylbenzoic acid, 2- (meth) Acryloyloxybenzoic acid, 3- (meth) acryl
- Examples of monofunctional polymerizable monomers having a plurality of carboxyl groups or acid anhydride groups in the molecule include 11- (meth) acryloyloxyundecane-1,1-dicarboxylic acid, 10- (meth) acryloyl Oxydecane-1,1-dicarboxylic acid, 12- (meth) acryloyl oxide decane-1,1-dicarboxylic acid, 6- (meth) acryloyloxyhexane-1,1-dicarboxylic acid, 2- (meth) acryloyloxyethyl -3′-methacryloyloxy-2 ′-(3,4-dicarboxybenzoyloxy) propyl succinate, 4- (meth) acryloyloxyethyl trimellitate anhydride, 4- (meth) acryloyloxyethyl trimellitate, 4- (meth) acryloyloxybutyl trimellitate, 4- (meth) acrylic Royloxyhe
- Examples of monofunctional polymerizable monomers having a phosphinyl group or phosphono group in the molecule include 2- (meth) acryloyloxyethyl dihydrogen phosphate, 2- (meth) acryloyloxyethyl phenyl hydrogen phosphate, 10 -(Meth) acryloyloxydecyl dihydrogen phosphate, 6- (meth) acryloyloxyhexyl dihydrogen phosphate, 2- (meth) acryloyloxyethyl-2-bromoethyl hydrogen phosphate, 2- (meth) acrylamidoethyldi Examples thereof include hydrogen phosphate and 6- (meth) acryloyloxyhexylphosphonoacetate.
- monofunctional polymerizable monomers having an acidic group such as 2- (meth) acrylamido-2-methylpropanesulfonic acid, 10-sulfodecyl (meth) acrylate, etc. And other monomers.
- the polymerizable monomer (A) having an acidic group is blended in an amount of 5.5 to 35 parts by weight out of 100 parts by weight of the total amount of the polymerizable monomers.
- the compounding amount of the polymerizable monomer (A) having an acidic group is less than 5.5 parts by weight, the acid etching effect and the primer treatment effect are not sufficiently obtained, and preferably 7 parts by weight or more.
- the compounding amount of the polymerizable monomer (A) having an acidic group exceeds 35 parts by weight, the composition becomes non-uniform, and it is necessary to shake the container containing the adhesive before applying the adhesive. Therefore, the convenience that is an advantage of the one-pack type adhesive is impaired. Furthermore, sufficient curability cannot be obtained, and the water absorption of the cured product may increase, leading to a decrease in adhesion durability.
- the total amount of the polymerizable monomer means a monomer component that is polymerized by the polymerization initiator (D), that is, a polymerizable monomer (A) having an acidic group, and a polymerization having a fluorocarbon group.
- Polymerizable monomer (B) having a fluorocarbon group having a fluorocarbon group
- the polymerizable monomer (B) having a fluorocarbon group represented by the following general formula (1) imparts curability to the composition, improves the water absorption and dimensional stability of the cured product, and adheres to the composition. It is a component that improves durability.
- the polymerizable monomers having a fluorocarbon group the polymerizable monomer (B) having a fluorocarbon group represented by the following general formula (1) is used as a polymerizable monomer having an acidic group with the above specific blending amount ( By combining with A) and water (C), the ambient light stability, adhesion and adhesion durability of the composition are improved in a well-balanced manner.
- Rf is a fluoroalkyl group having 1 to 20 carbon atoms, preferably 1 to 10 carbon atoms, more preferably 1 to 5 carbon atoms.
- the number of fluorine atoms that the fluoroalkyl group has is not particularly limited as long as the hydrogen atom of the alkyl group is substituted with at least one fluorine atom, and part or all of the hydrogen atoms of the alkyl group are fluorine atoms. May be substituted.
- R 1 represents a hydrogen atom or a methyl group, and a methyl group is preferable from the viewpoint of irritation to the living body when the polymerizable site is eliminated.
- the polymerizable monomer (B) having a fluorocarbon group can be used alone or in combination of two or more.
- Examples of the polymerizable monomer (B) having a fluorocarbon group include trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate, pentafluoropropyl (meth) acrylate, octafluoropentyl (meth) acrylate, hepta Examples include decafluorononyl (meth) acrylate.
- the blending amount of the polymerizable monomer (B) having a fluorocarbon group is not particularly limited. However, if the blending amount of the polymerizable monomer (B) is too small, the adhesion durability due to the polymerizable monomer (B) is reduced. The improvement effect may not be obtained. Moreover, there exists a possibility that coloring resistance may fall. On the other hand, when there are too many compounding quantities, the decalcification effect
- Water (C) is a component that improves the adhesiveness and adhesion durability of the composition to the tooth. As water (C), it is preferable not to contain the impurity which has a bad influence, and distilled water or ion-exchange water is preferable.
- the water (C) may be used alone or as a mixed solvent of water (C) and an organic solvent (H) described later.
- the blending amount of water (C) is preferably 5 to 500 parts by weight with respect to 100 parts by weight of the total amount of polymerizable monomers. When the blending amount is less than 5 parts by weight, the ambient light stability may be lowered, and the penetrability of the polymerizable monomer into the dentin collagen layer may be insufficient, and the adhesive strength may be lowered. There is.
- the blending amount of water (C) is more preferably 7 parts by weight or more, further preferably 8 parts by weight or more, and most preferably 10 parts by weight or more.
- the blending amount of water (C) exceeds 500 parts by weight, the polymerizability of the polymerizable monomer is lowered, the adhesion strength is lowered and the adhesion durability is lowered and the uniformity of the composition is reduced. There is a risk of damage.
- the blending amount of water (C) is more preferably 100 parts by weight or less.
- Polymerization initiator (D) The polymerization initiator (D) is a component that accelerates polymerization and curing of the composition.
- the polymerization initiator (D) can be selected from polymerization initiators used in the general industry, and among them, polymerization initiators used for dental applications are preferably used. In particular, polymerization initiators for photopolymerization and chemical polymerization are used singly or in appropriate combination of two or more.
- Photopolymerization initiators include (bis) acylphosphine oxides, water-soluble acylphosphine oxides, thioxanthones or quaternary ammonium salts of thioxanthones, ketals, ⁇ -diketones, coumarins, anthraquinones, benzoin alkyls Examples include ether compounds and ⁇ -aminoketone compounds.
- photopolymerization initiators it is preferable to use at least one selected from the group consisting of (bis) acylphosphine oxides and salts thereof, ⁇ -diketones, and coumarin compounds.
- a composition having excellent photocurability in the visible and near-ultraviolet regions and having sufficient photocurability can be obtained using any light source such as a halogen lamp, a light emitting diode (LED), or a xenon lamp.
- Acylphosphine oxides used as the photopolymerization initiator include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,6-dimethoxybenzoyldiphenylphosphine oxide, 2,6-dichlorobenzoyldiphenylphosphine oxide, 2, 4,6-trimethylbenzoylmethoxyphenylphosphine oxide, 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide, 2,3,5,6-tetramethylbenzoyldiphenylphosphine oxide, benzoyldi- (2,6-dimethylphenyl) phosphonate Etc.
- bisacylphosphine oxides used as the photopolymerization initiator include bisacylphosphine oxides represented by the following general formula (3).
- R 4 represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an acyl group, or an acyloxy group
- R 5 to R 14 each independently represent a hydrogen atom, a halogen atom, an alkyl group, A group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an acyl group, or an acyloxy group;
- the alkyl group represented by R 4 to R 14 is preferably an alkyl group having 1 to 10 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a cyclopropyl group, an n-butyl group, Isobutyl group, sec-butyl group, tert-butyl group, cyclobutyl group, n-pentyl group, isopentyl group, neopentyl group, tert-pentyl group, 2,4,4-trimethylpentyl group, cyclopentyl group, n-hexyl group, Examples include isohexyl group, cyclohexyl group, n-heptyl group, cycloheptanyl group, n-octyl group, 2-ethylhexyl group, cyclooctanyl group, n-nonyl group,
- the alkenyl group represented by R 4 to R 14 is preferably an alkenyl group having 2 to 10 carbon atoms.
- a vinyl group, an allyl group, a methylvinyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a cyclo A propenyl group, a cyclobutenyl group, a cyclopentenyl group, a cyclohexenyl group and the like can be mentioned.
- the alkynyl group represented by R 4 to R 14 is preferably an alkynyl group having 2 to 10 carbon atoms.
- the aryl group represented by R 4 to R 14 is preferably an aryl group having 6 to 30 carbon atoms, such as a phenyl group, o-tolyl group, m-tolyl group, p-tolyl group, xylyl group, mesityl group. , A naphthyl group, an anthracenyl group, and the like. These aryl groups may further contain an alkyl group, an alkoxy group, an alkenyl group, or an alkynyl group.
- an alkoxy group having 1 to 10 carbon atoms is preferable, and examples thereof include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, a cyclopropyloxy group, an n- Examples thereof include a butoxy group, an isobutoxy group, a sec-butoxy group, a tert-butoxy group, a cyclobutoxy group, and a cyclohexyloxy group.
- the acyl group represented by R 4 to R 14 is preferably an acyl group having 1 to 10 carbon atoms.
- acyl group having 1 to 10 carbon atoms For example, formyl group; acetyl group, propionyl group, butyryl group, isobutyryl group, valeryl group, pivaloyl group, hexanoyl Group, heptanoyl group, octanoyl group, decenoyl group, etc., C2-C10 alkylcarbonyl group; benzoyl group, etc., C7-C9 arylcarbonyl group; benzylcarbonyl group, etc., C8-C10 arylalkylcarbonyl group Groups and the like.
- the acyloxy group represented by R 4 to R 14 is preferably an acyloxy group having 1 to 10 carbon atoms, and examples thereof include a group in which one oxygen atom is bonded to the above group exemplified as the acyl group.
- Examples of the halogen atom represented by R 5 to R 14 include a fluorine atom, a chlorine atom, a bromine atom, etc. Among them, a chlorine atom is preferable.
- R 4 is preferably an alkyl group or an aryl group.
- R 5 to R 14 are preferably a hydrogen atom, a halogen atom, an alkyl group, or an alkoxy group.
- bisacylphosphine oxide represented by the formula (3) include, for example, bis- (2,6-dichlorobenzoyl) phenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -2,5-dimethyl.
- Phenylphosphine oxide bis- (2,6-dichlorobenzoyl) -4-propylphenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -1-naphthylphosphine oxide, bis- (2,6-dimethoxybenzoyl) phenyl Phosphine oxide, bis- (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis- (2,6-dimethoxybenzoyl) -2,5-dimethylphenylphosphine oxide, bis- (2, 4,6-trimethylbenzoyl) E cycloalkenyl phosphine oxide, and the like (2,5,6-trimethylbenzoyl) -2,4,4-trimethylpentyl phosphine oxide.
- Examples of the ⁇ -diketone used as the photopolymerization initiator include diacetyl, dibenzyl, camphorquinone, 2,3-pentadione, 2,3-octadione, 9,10-phenanthrenequinone, 4,4′- Examples thereof include oxybenzyl and acenaphthenequinone.
- camphorquinone is particularly preferable from the viewpoint of having a maximum absorption wavelength in the visible light region.
- Examples of coumarin compounds used as the photopolymerization initiator include 3,3′-carbonylbis (7-diethylamino) coumarin, 3- (4-methoxybenzoyl) coumarin, 3-chenoylcoumarin, and 3-benzoyl-5.
- bisacylphosphine oxide represented by the general formula (3) is particularly preferable because the adhesiveness of the composition is particularly excellent.
- an organic peroxide is preferably used as the chemical polymerization initiator.
- the organic peroxide used for said chemical polymerization initiator is not specifically limited, A well-known thing can be used.
- Typical organic peroxides include ketone peroxide, hydroperoxide, diacyl peroxide, dialkyl peroxide, peroxyketal, peroxyester, peroxydicarbonate, and the like. Specific examples of these organic peroxides include those described in International Publication No. 2008/089777 pamphlet.
- the blending amount of the polymerization initiator (D) is not particularly limited, but from the viewpoint of curability and the like of the resulting composition, it is 0.001 to 20 parts by weight with respect to 100 parts by weight of the total amount of polymerizable monomers. preferable.
- the blending amount of the polymerization initiator (D) is less than 0.001 part by weight, the polymerization does not proceed sufficiently and there is a risk of causing a decrease in adhesive strength, and more preferably 0.01 part by weight or more. .
- the blending amount of the polymerization initiator (D) exceeds 20 parts by weight, if the polymerization performance of the polymerization initiator itself is low, sufficient adhesive strength may not be obtained, and further from the composition Is more preferably 10 parts by weight or less, and even more preferably 5 parts by weight or less.
- Polymerizable monomer (E) containing one polymerizable group and one or more hydroxyl groups The composition of the present invention preferably contains a polymerizable monomer (E) having one polymerizable group and one or more hydroxyl groups.
- the polymerizable monomer (E) is a component that has one or more hydroxyl groups and thus has good hydrophilicity, improves the penetrating action of the composition, improves the adhesion, and contributes to the uniformity of the composition. is there.
- radical polymerization becomes possible and copolymerization with other polymerizable monomers becomes possible.
- the polymerizable monomer (E) having one polymerizable group and one or more hydroxyl groups is not particularly limited, and the polymerizable group of the polymerizable monomer (E) is a polymerizable monomer ( A group capable of radical copolymerization with the polymerizable group of A) and (B) is preferable. From the viewpoint of easy radical polymerization, the polymerizable group of the polymerizable monomer (E) is preferably a (meth) acryl group or a (meth) acrylamide group.
- the polymerizable monomer (E) is used as a component of the dental adhesive composition, since the oral cavity is a moist environment, the polymerizable group may be detached by hydrolysis or the like. In consideration of the irritation to the living body of the detached polymerizable group, the polymerizable group of the polymerizable monomer (E) is preferably a methacryl group or a methacrylamide group.
- the polymerizable monomer (E) can be used alone or in appropriate combination of two or more.
- examples of the polymerizable monomer (E) include 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 10 -Hydroxydecyl (meth) acrylate, propylene glycol mono (meth) acrylate, glycerol mono (meth) acrylate, erythritol mono (meth) acrylate, N-methylol (meth) acrylamide, N-hydroxyethyl (meth) acrylamide, N, N -(Dihydroxyethyl) (meth) acrylamide and the like.
- 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meta) are preferred from the viewpoint of improving the penetration of dentin into the collagen layer.
- Acrylate, glycerol mono (meth) acrylate, erythritol mono (meth) acrylate preferably, particularly preferably 2-hydroxyethyl methacrylate.
- the blending amount of the polymerizable monomer (E) is not particularly limited, but if the blending amount of the polymerizable monomer (E) is too small, an effect of improving the penetrating action by the polymerizable monomer (E) is obtained. There is a possibility that it cannot be maintained, the uniformity of the composition cannot be maintained, and the adhesive strength may be reduced. On the other hand, when there are too many compounding quantities, sufficient sclerosis
- Polymerizable monomer (F) containing two polymerizable groups and two hydroxyl groups The composition of the present invention preferably contains a polymerizable monomer (F) containing two polymerizable groups represented by the general formula (2) and two hydroxyl groups.
- the polymerizable monomer (F) has crosslinkability because it contains two polymerizable groups, and has high hydrophilicity because it contains two hydroxyl groups. Accordingly, the polymerizable monomer (F) is a component that increases the penetration of the composition into the dentin collagen layer and at the same time increases the mechanical strength of the resin-impregnated layer and improves the adhesion durability. Furthermore, since the polymerizable monomer (F) has an ethylene glycol unit as a spacer structure, it can impart appropriate flexibility to the cured product.
- R 2 and R 3 each independently represent a hydrogen atom or a methyl group, and a methyl group is preferred from the viewpoint of irritation to the living body when the polymerizable moiety is eliminated.
- n represents an integer of 1 to 5, preferably an integer of 1 to 3, and n is 1 (that is, 1,2-bis [3- (meth) acryloyloxy-2-hydroxypropoxy] ethane ) Is more preferable.
- the polymerizable monomer (F) can be used alone or in combination of two or more.
- the blending amount of the polymerizable monomer (F) is not particularly limited, but if the blending amount of the polymerizable monomer (F) is too small, the penetrating action, mechanical strength, and adhesion durability due to the polymerizable monomer (F). There is a possibility that the effect of improving the property cannot be obtained. On the other hand, when there are too many compounding quantities, there exists a possibility that the de-ashing and osmosis
- Crosslinkable polymerizable monomer (G) The composition of the present invention comprises a crosslinkable polymerizable monomer (G) other than the polymerizable monomer (F) containing two polymerizable groups and two hydroxyl groups represented by the general formula (2). ) Is preferably contained.
- the composition containing the crosslinkable polymerizable monomer (G) has advantages such as further improvement in adhesive strength.
- the crosslinkable polymerizable monomer (G) can be used alone or in appropriate combination of two or more. Although it does not specifically limit as a crosslinkable polymerizable monomer (G), An aromatic compound type bifunctional polymerizable monomer, an aliphatic compound type bifunctional polymerizable monomer, trifunctionality The above polymerizable monomers are exemplified. Note that “bifunctional” and “trifunctional” mean that the polymerizable monomer has two and three polymerizable groups, respectively.
- aromatic compound-based bifunctional polymerizable monomers examples include 2,2-bis ((meth) acryloyloxyphenyl) propane, 2,2-bis [4- (3- (meth) acryloyloxy) -2-hydroxypropoxyphenyl] propane (commonly referred to as “Bis-GMA”), 2,2-bis (4- (meth) acryloyloxyethoxyphenyl) propane, 2,2-bis (4- (meth) acryloyloxypolyethoxy) Phenyl) propane, 2,2-bis (4- (meth) acryloyloxydiethoxyphenyl) propane, 2,2-bis (4- (meth) acryloyloxytriethoxyphenyl) propane, 2,2-bis (4- (Meth) acryloyloxytetraethoxyphenyl) propane, 2,2-bis (4- (meth) acryloyloxypentaeth Cyphenyl) propane, 2,2-bis (4- (meth) acryloyloxydipropoxy
- Examples of aliphatic compound-based bifunctional polymerizable monomers include glycerol di (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, propylene Glycol di (meth) acrylate, butylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, 1,3-butanediol di (meth) acrylate, 1,5-pentanediol Di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,10-decanediol di (meth) acrylate, and 2,2,4-trimethylhexamethylenebis (2-carbamoyloxyethyl) di Methacrylate (commonly known as "UDMA”), and the like.
- trifunctional or higher polymerizable monomers examples include trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, trimethylolmethane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, Pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, N, N- (2,2,4-trimethylhexamethylene) And bis [2- (aminocarboxy) propane-1,3-diol] tetramethacrylate, 1,7-diaacryloyloxy-2,2,6,6-tetraacryloyloxymethyl-4-oxyheptane, and the like. .
- crosslinkable polymerizable monomer (G) examples include 2,2-bis [4- (3- (meth) acryloyloxy) -2-hydroxypropoxyphenyl] propane, 2,2-bis ( 4- (meth) acryloyloxyethoxyphenyl) propane, 2,2-bis (4- (meth) acryloyloxypolyethoxyphenyl) propane, 2,2-bis (4- (meth) acryloyloxypropoxyphenyl) propane, 2 , 4-Trimethylhexamethylenebis (2-carbamoyloxyethyl) dimethacrylate, triethylene glycol di (meth) acrylate, and glycerol di (meth) acrylate are preferred, and 2,2-bis [4- (3- (meth) acryloyl Oxy) -2-hydroxypropoxyphenyl] propane, 2,4-trimethyl Hexamethylene bis (2-carbamoyloxyethyl) dimethacrylate, triethylene glycol di (meth) acrylate
- the blending amount of the crosslinkable polymerizable monomer (G) is not particularly limited, but if the blending amount of the polymerizable monomer (G) is too small, the effect of improving the adhesive strength by the polymerizable monomer (G). May not be obtained. On the other hand, if the amount is too large, penetration of dentin into the collagen layer may be insufficient, and high adhesive strength may not be obtained, and the uniformity of the composition may be impaired. Therefore, the compounding amount of the polymerizable monomer (F) is preferably 20 to 60 parts by weight, more preferably 25 to 55 parts by weight, out of 100 parts by weight of the total amount of the polymerizable monomers. .
- Organic solvent (H) The composition of the present invention may contain an organic solvent (H) in order to improve the solubility of the polymerizable monomer and obtain a uniform composition.
- An organic solvent (H) can be used individually or in combination of 2 or more types as appropriate.
- Examples of the organic solvent (H) include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-methyl-2-propanol, acetone, methyl ethyl ketone, tetrahydrofuran, diethyl ether, diisopropyl ether, hexane, toluene, chloroform, Examples include ethyl acetate and butyl acetate.
- the organic solvent (H) is preferably a water-soluble organic solvent in consideration of both safety to the living body and ease of removal based on volatility. Specifically, ethanol, 2- Propanol, 2-methyl-2-propanol, acetone, and tetrahydrofuran are preferably used.
- the blending amount of the organic solvent (H) is not particularly limited, and is preferably 1 to 1000 parts by weight, and more preferably 5 to 200 parts by weight with respect to 100 parts by weight of the total amount of polymerizable monomers.
- Polymerization accelerator (I) In a preferred embodiment, a polymerization accelerator (I) is used.
- the polymerization accelerator (I) used in the present invention includes amines, sulfinic acid and its salts, borate compounds, barbituric acid derivatives, triazine compounds, copper compounds, tin compounds, vanadium compounds, halogen compounds, aldehydes, thiols. Compound, sulfite, bisulfite, thiourea compound and the like can be mentioned.
- the amines used as the polymerization accelerator (I) are classified into aliphatic amines and aromatic amines.
- the aliphatic amine include primary aliphatic amines such as n-butylamine, n-hexylamine and n-octylamine; secondary aliphatic amines such as diisopropylamine, dibutylamine and N-methylethanolamine; N-methyldiethanolamine, N-ethyldiethanolamine, Nn-butyldiethanolamine, N-lauryldiethanolamine, 2- (dimethylamino) ethyl methacrylate, N-methyldiethanolamine dimethacrylate, N-ethyldiethanolamine dimethacrylate, triethanolamine monomethacrylate , Tertiary fats such as triethanolamine dimethacrylate, triethanolamine trimethacrylate, triethanolamine, trimethylamine, triethylamine, tributylamine Amine
- aromatic amine examples include N, N-bis (2-hydroxyethyl) -3,5-dimethylaniline, N, N-di (2-hydroxyethyl) -p-toluidine, and N, N-bis. (2-hydroxyethyl) -3,4-dimethylaniline, N, N-bis (2-hydroxyethyl) -4-ethylaniline, N, N-bis (2-hydroxyethyl) -4-isopropylaniline, N, N-bis (2-hydroxyethyl) -4-t-butylaniline, N, N-bis (2-hydroxyethyl) -3,5-di-isopropylaniline, N, N-bis (2-hydroxyethyl)- 3,5-di-t-butylaniline, N, N-dimethylaniline, N, N-dimethyl-p-toluidine, N, N-dimethyl-m-toluidine, N, N-diethyl
- sulfinic acid and its salts include those described in International Publication No. 2008/089777 pamphlet.
- the compounding quantity of the polymerization accelerator (I) used for this invention is not specifically limited, From viewpoints, such as sclerosis
- the amount of the polymerization accelerator (I) exceeds 30 parts by weight, if the polymerization performance of the polymerization initiator itself is low, there is a possibility that sufficient adhesive strength may not be obtained, and further from the composition Therefore, the amount is more preferably 20 parts by weight or less.
- the composition of the present invention may contain a filler (J).
- a filler Such fillers are generally roughly classified into organic fillers, inorganic fillers, and organic-inorganic composite fillers.
- the organic filler material include polymethyl methacrylate, polyethyl methacrylate, methyl methacrylate-ethyl methacrylate copolymer, cross-linked polymethyl methacrylate, cross-linked polyethyl methacrylate, polyamide, polyvinyl chloride, and polystyrene.
- the shape of the organic filler is not particularly limited, and the particle size of the filler can be appropriately selected and used. From the viewpoint of handling properties and mechanical strength of the resulting composition, the average particle size of the organic filler is preferably 0.001 to 50 ⁇ m, and more preferably 0.001 to 10 ⁇ m.
- Inorganic filler materials include quartz, silica, alumina, silica-titania, silica-titania-barium oxide, silica-zirconia, silica-alumina, lanthanum glass, borosilicate glass, soda glass, barium glass, strontium glass, and glass ceramic. , Aluminosilicate glass, barium boroaluminosilicate glass, strontium boroaluminosilicate glass, fluoroaluminosilicate glass, calcium fluoroaluminosilicate glass, strontium fluoroaluminosilicate glass, barium fluoroaluminosilicate glass, strontium calcium fluoroaluminosilicate glass, etc. .
- the shape of the inorganic filler is not particularly limited, and the particle diameter of the filler can be appropriately selected and used. From the viewpoint of handling property and mechanical strength of the resulting composition, the average particle size of the inorganic filler is preferably 0.001 to 50 ⁇ m, and more preferably 0.001 to 10 ⁇ m.
- the shape of the inorganic filler includes an amorphous filler and a spherical filler. From the viewpoint of improving the mechanical strength of the composition, it is preferable to use a spherical filler as the inorganic filler.
- the spherical filler is a particle diameter in a direction perpendicular to the maximum diameter, in which a photograph of the filler is taken with a scanning electron microscope (hereinafter abbreviated as SEM), and the particles observed in the unit field of view are rounded. Is a filler having an average homogeneity of 0.6 or more divided by its maximum diameter.
- the average particle diameter of the spherical filler is preferably 0.001 to 5 ⁇ m.
- the filling rate of the spherical filler in the composition is lowered, and the mechanical strength may be lowered.
- the average particle diameter exceeds 5 ⁇ m, the surface area of the spherical filler is reduced, and a cured product having high mechanical strength may not be obtained.
- the inorganic filler may be used after surface treatment with a known surface treatment agent such as a silane coupling agent as necessary.
- a known surface treatment agent such as a silane coupling agent
- the surface treatment agent include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltrichlorosilane, vinyltri ( ⁇ -methoxyethoxy) silane, ⁇ -methacryloyloxypropyltrimethoxysilane, 11-methacryloyloxyundecyltrimethoxysilane.
- the organic-inorganic composite filler used in the present invention is obtained by previously adding a monomer compound to the above-described inorganic filler, forming a paste, polymerizing, and pulverizing.
- a monomer compound for example, TMPT filler (trimethylolpropane methacrylate and silica filler mixed and polymerized and then pulverized) can be used.
- the shape of the organic-inorganic composite filler is not particularly limited, and the particle diameter of the filler can be appropriately selected and used. From the viewpoint of handling properties and mechanical strength of the resulting composition, the average particle size of the organic-inorganic composite filler is preferably 0.001 to 50 ⁇ m, and more preferably 0.001 to 10 ⁇ m.
- an inorganic filler having a primary particle diameter of 0.001 to 5 ⁇ m is preferable, and a silica filler having a primary particle diameter of 0.001 to 0.1 ⁇ m is more preferable.
- the blending amount of the filler (J) used in the present invention is not particularly limited, and is preferably 1 to 100 parts by weight, and more preferably 3 to 50 parts by weight with respect to 100 parts by weight of the total amount of polymerizable monomers.
- the filler (J) is blended, the filler (J) is dissolved in each other at 25 ° C. It means a state in which it is dispersed and present in a one-pack type dental adhesive without separation and settling.
- the composition of the present invention may further contain a fluorine ion releasing substance.
- a fluorine ion releasing substance By blending a fluorine ion-releasing substance, a composition capable of imparting acid resistance to the tooth is obtained.
- the fluorine ion releasing substance include metal fluorides such as sodium fluoride, potassium fluoride, sodium monofluorophosphate, lithium fluoride, ytterbium fluoride, and the like.
- composition of the present invention may contain a pH adjuster, a polymerization inhibitor, an ultraviolet absorber, a thickener, a colorant, an antibacterial agent, a fragrance and the like as long as the effects of the present invention are not impaired. .
- the dental adhesive composition of the present invention is a one-pack type, and the composition can be stored in one container.
- the one-component dental adhesive composition of the present invention can be produced by mixing each component by a known method.
- the one-pack type dental adhesive composition of the present invention can be used, for example, when bonding dental materials and dental restorative materials such as dental composite resins, dental compomers, and dental resin cements. At this time, it can be used as a one-step type adhesive. That is, the one-component dental adhesive composition of the present invention can be directly applied to the tooth without using a pretreatment agent such as an etching material, a primer, or a self-etching primer.
- a pretreatment agent such as an etching material, a primer, or a self-etching primer.
- the one-pack type dental adhesive composition of the present invention has high environmental light stability, and can sufficiently ensure the operation allowance time and the tooth treatment time required for decalcification and penetration.
- the one-pack type dental adhesive composition of the present invention exhibits excellent adhesion and adhesion durability with respect to dentin (particularly dentin).
- the one-component dental composition of the present invention can be used easily because each component is uniformly mixed, so that the operation of uniformly mixing each component at the time of use is unnecessary.
- the one-pack type dental adhesive composition of the present invention has low water absorption of the cured product and high coloration resistance.
- MDP 10-methacryloyloxydecyl dihydrogen phosphate
- 4-META 4-methacryloyloxyethyl trimellitate
- 6-MHPA 6-methacryloyloxyhexyl phosphonoacetate
- HEMA 2-hydroxyethyl methacrylate
- 4FMA tetrafluoropropyl methacrylate
- GEDMA 1,2-bis (3-methacryloyloxy-2-hydroxypropoxy) ethane
- Bis-GMA 2,2-bis [4- (3-methacryloyloxy) -2-hydroxypropoxyphenyl] propane UDMA: 2,2 , 4-Trimethylhexamethylenebis (2-carbamoyloxyethyl) dimethacrylate
- TEGDMA Triethylene glycol dimethacrylate GDMA: Glycerol dimethacrylate
- TMDPO 2,4,6-trimethylbenzoyldiphenylphosphine oxide
- BAPO Bis (2,4,6 -Trimethylbenzoyl) phenylphosphine oxide
- CQ camphorquinone
- PDE ethyl p- (N, N-dimethylamino) benzoate
- DEPT N, N-di (2-hydroxyethyl) -p-toluidine
- T A triethanolamine inorganic filler 1: Nippon Aerosil
- Adhesion test (1) The lip surface of bovine mandibular anterior teeth was polished with # 80 silicon carbide paper (Nihon Kenshi Co., Ltd.) under running water to obtain a sample in which the flat surface of dentin was exposed. The obtained sample was further polished with # 1000 silicon carbide paper (manufactured by Nihon Kenshi) under running water. After polishing, the surface water was dried by air blowing. An adhesive tape having a round hole with a diameter of 3 mm and having a thickness of about 150 ⁇ m was attached to the smooth surface after drying to define the adhesion area.
- the above-prepared one-part adhesive was applied in the above-described round hole with a brush, left for 10 seconds, and then air-blowed on the surface to dry the applied one-part adhesive until the fluidity disappeared. Subsequently, the applied one-part adhesive was cured by light irradiation for 10 seconds with a dental visible light irradiator “JET Light 3000” (manufactured by J. Morita USA).
- the surface of the cured product of the obtained one-component adhesive is filled with a composite resin for dental filling (trade name “Clearfill AP-X” (registered trademark) manufactured by Kuraray Medical Co., Ltd.), and a release film (polyester) is used. Covered. Subsequently, a glass slide was placed on the release film and pressed to smooth the coated surface of the composite resin. Subsequently, the composite resin was irradiated with light using the irradiator “JET Light 3000” for 20 seconds through the release film to cure the composite resin.
- a composite resin for dental filling trade name “Clearfill AP-X” (registered trademark) manufactured by Kuraray Medical Co., Ltd.
- a release film polyester
- a stainless steel cylindrical rod (diameter 7 mm, length 2) using a commercially available dental resin cement (trade name “Panavia 21” manufactured by Kuraray Medical Co., Ltd.) on the surface of the cured product of the obtained dental filling composite resin. 0.5 cm) was bonded to one end face (circular cross section). After bonding, the sample was allowed to stand at room temperature for 30 minutes and then immersed in distilled water. A total of 10 samples for adhesion test were prepared and allowed to stand in a thermostat maintained at 37 ° C. for 24 hours. For five of the ten samples, the adhesive strength was measured immediately after standing for 24 hours in order to evaluate the initial adhesive strength.
- the adhesive strength was further increased after 4000 cycles of one cycle of the step of alternately immersing in cold water at 4 ° C. and hot water at 60 ° C. for 1 minute. It was measured.
- the tensile bond strength of the above sample for the adhesion test was measured with a universal testing machine (manufactured by Shimadzu Corporation) with the crosshead speed set to 2 mm / min, and the average value was taken as the tensile bond strength.
- Adhesion test (2) The center of the human third molar crown was cut perpendicular to the tooth axis using a precision low-speed cutter “Isomet 5000” (Buehler) to obtain a sample in which the flat surface of dentin was exposed. .
- the obtained sample was polished with # 600 silicon carbide paper (Nihon Kenshi Co., Ltd.) under water injection.
- the surface water is dried by air blowing, and the produced one-component adhesive is applied with a brush and left for 10 seconds, and then the surface is air-blown to apply the applied one-component adhesive. Dry until free of fluidity.
- the applied one-part adhesive was cured by light irradiation for 10 seconds with a dental visible light irradiator “JET Light 3000” (manufactured by J. Morita USA).
- a composite resin for dental filling (trade name “Clearfill AP-X” (registered trademark), manufactured by Kuraray Medical Co., Ltd.) is raised to a thickness of 1 mm on the surface of the cured product of the obtained one-component adhesive, and the irradiator Using “JET Light 3000”, light irradiation was performed for 20 seconds to cure the composite resin. Further, the composite resin was laminated at a thickness of 2 mm and irradiated with light, and this was repeated twice, so that the laminate thickness of the composite resin was 5 mm and immersed in distilled water.
- a total of two samples for adhesion test were prepared and allowed to stand for 24 hours in a thermostat maintained at 37 ° C. For one of them, in order to evaluate the adhesive strength at the initial stage of adhesion, the test piece was cut out and the adhesion strength was measured immediately after standing for 24 hours. For the remaining one, in order to evaluate the adhesion durability, the sample was embedded in a brass cup using an epoxy resin, and then a load of 8 kg was applied 100,000 times using a line felter type testing machine. Granted. After loading, a sample was taken out from the cup, a test piece was cut out, and the adhesive strength was measured.
- a section having a thickness of 1.0 mm was cut in the major axis direction under water injection using the precision low-speed cutter “Isomet 5000”. Subsequently, the section was cut out with a width of 1.0 mm so that the deposition area was about 1 mm 2, and 10 to 20 stick-shaped test pieces were produced.
- the obtained stick-shaped test piece is fixed to a jig using a model repair agent “Model Repair II Blue” (distributor: Dentsu Ply Sankin), and a small desktop testing machine “EZ Test” (manufactured by Shimadzu Corporation)
- the crosshead speed was set to 1 mm / min to measure the adhesive strength, and the average value of the stick-shaped test pieces was defined as the micro tensile adhesive strength.
- the unpolymerized portion of the obtained cured product was wiped off and immersed in water, and immersed in a thermostat at 37 ° C. for 24 hours.
- the cured product was taken out, wiped off moisture, and the weight of the cured product was measured (weight A).
- the mixture was cooled to room temperature in a desiccator containing silica gel, and the weight was measured (weight B).
- Coloring resistance test Turmeric (0.005 g) [manufactured by Gaban Co., Ltd.] was placed in distilled water (100 mL) to prepare a yellow turmeric suspension.
- the cured product of the one-pack type adhesive prepared by the same method as in the water absorption test was immersed in it. After being stored in a thermostat at 37 ° C. for 18 hours, the cured product was taken out, washed with running water for 1 minute, and then the degree of coloring of the cured product was visually observed.
- Environmental light stability test Take 1 drop (approx. 20 mg) of the above-mentioned 1-component adhesive on a mixing dish, leave it under a dental light adjusted to illuminance of 8,000 lux for a specified time, scoop up the sample with a brush, and gel The presence or absence of a form was confirmed. The measurement was performed at intervals of 10 seconds, and the longest time during which no gel-like material was observed was defined as the operation allowance time.
- the one-component dental adhesive composition of the present invention has high adhesion strength and fine tensile adhesion strength to dentin, good uniformity, and high environmental light stability. In addition, it was found that the water absorption and coloring of the bonded cured product are small.
- Comparative Example 1 that does not contain a polymerizable monomer (B) having a fluorocarbon group is superior in terms of adhesion, uniformity, and ambient light stability, but has a high water absorption rate of the bonded cured product and a thermal cycle load. It was found that the adhesion strength to the later dentin was inferior and the degree of coloring was large. Further, in Comparative Example 2 not containing water (C), the deashing and penetrating actions are inferior, so the adhesive strength is low, and the ratio of the polymerizable monomer in the composition is increased, so the ambient light stability is low. I understood.
- Comparative Example 3 having a small amount of the polymerizable monomer (A) having an acidic group has a low adhesion strength because of its poor decalcification action.
- Comparative Example 4 in which there are many polymerizable monomers (A) having an acidic group, the compatibility of the polymerizable monomer, water (C), and organic solvent (H) is reduced, resulting in a non-uniform composition. Furthermore, since the curability is poor, it has been found that the adhesiveness is decreased, the water absorption of the cured product is increased, and coloring is caused.
- Comparative Example 5 in which DPEPA19F was blended in place of the polymerizable monomer (B) having a fluorocarbon group, the compatibility of the polymerizable monomer with water (C) and the organic solvent (H) was reduced, resulting in unevenness. In addition, the composition was inferior in penetrating action due to the hydrophobic strength of DPEPA19F, resulting in a decrease in adhesive strength.
- the one-pack type dental adhesive composition of the present invention is useful for bonding dental materials and dental restorative materials such as dental composite resins, dental compomers, and dental resin cements.
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Abstract
Description
酸性基を有する重合性単量体(A)は、酸エッチング効果及びプライマー処理効果を有しており、組成物に脱灰作用及び浸透作用を与える成分である。また、酸性基を有する重合性単量体(A)は、重合可能であり、硬化作用も付与する。組成物が酸性基を有する重合性単量体(A)を含有することにより、1液型の歯科用接着材として機能することができ、また歯質に対する接着性と接着耐久性が向上する。
下記一般式(1)で表されるフルオロカーボン基を有する重合性単量体(B)は、組成物に硬化性を与え、また組成物の硬化物の吸水率及び寸法安定性を改善し、接着耐久性を向上させる成分である。フルオロカーボン基を有する重合性単量体の中でも下記一般式(1)で表されるフルオロカーボン基を有する重合性単量体(B)を、上記特定配合量の酸性基を有する重合性単量体(A)及び水(C)と組み合わせることにより、組成物の環境光安定性、接着性及び接着耐久性がバランスよく高くなる。
水(C)は、組成物の歯質に対する接着性と接着耐久性を向上させる成分である。水(C)としては、悪影響を及ぼすような不純物を含有していないことが好ましく、蒸留水又はイオン交換水が好ましい。上記水(C)は単独で用いてもよいし、水(C)と後述の有機溶媒(H)の混合溶媒として用いてもよい。
重合開始剤(D)は、組成物の重合硬化を促進する成分である。重合開始剤(D)は、一般工業界で使用されている重合開始剤から選択して使用でき、中でも歯科用途に用いられている重合開始剤が好ましく用いられる。特に、光重合及び化学重合の重合開始剤が、単独で又は2種以上適宜組み合わせて使用される。
本発明の組成物は、1個の重合性基と1個以上の水酸基とを有する重合性単量体(E)を含有してなることが好ましい。重合性単量体(E)は、水酸基を1個以上有するため親水性が良好であり、組成物の浸透作用を向上させ、接着性を向上させ、組成物の均一性にも貢献する成分である。重合性単量体(E)が1個の重合性基を有することによりラジカル重合が可能となるとともに、他の重合性単量体との共重合が可能となる。1個の重合性基と1個以上の水酸基とを有する重合性単量体(E)としては特に限定されず、重合性単量体(E)の重合性基は、重合性単量体(A)及び(B)の重合性基とラジカル共重合可能な基であることが好ましい。ラジカル重合が容易である観点からは、重合性単量体(E)の重合性基は(メタ)アクリル基、又は(メタ)アクリルアミド基が好ましい。重合性単量体(E)は歯科用接着材組成物の成分として用いられるが、口腔内は湿潤な環境であるため、加水分解などにより重合性基が脱離するおそれがある。脱離した重合性基の生体への刺激性を考慮した場合、重合性単量体(E)の重合性基は、メタクリル基、又はメタクリルアミド基であることが好ましい。
本発明の組成物は、上記一般式(2)で表される2個の重合性基と2個の水酸基を含む重合性単量体(F)を含有することが好ましい。
本発明の組成物は、前記一般式(2)で表される2個の重合性基と2個の水酸基を含む重合性単量体(F)以外の架橋性の重合性単量体(G)を含有してなることが好ましい。架橋性の重合性単量体(G)を含む組成物は、接着強さがさらに向上する等の利点を有する。
本発明の組成物は、重合性単量体の溶解性を向上させ、均一な組成物を得るために、有機溶媒(H)を含んでいてもよい。有機溶媒(H)は、単独で又は2種以上適宜組み合わせて使用することができる。有機溶媒(H)としては、メタノール、エタノール、1-プロパノール、2-プロパノール、1-ブタノール、2-メチル-2-プロパノール、アセトン、メチルエチルケトン、テトラヒドロフラン、ジエチルエーテル、ジイソプロピルエーテル、ヘキサン、トルエン、クロロホルム、酢酸エチル、酢酸ブチル等が挙げられる。これらの中でも、生体に対する安全性と、揮発性に基づく除去の容易さの双方を勘案した場合、有機溶媒(H)が水溶性有機溶媒であることが好ましく、具体的には、エタノール、2-プロパノール、2-メチル-2-プロパノール、アセトン、及びテトラヒドロフランが好ましく用いられる。前記有機溶媒(H)の配合量は特に限定されず、重合性単量体の全量100重量部に対して、1~1000重量部が好ましく、5~200重量部がより好ましい。
好ましい実施態様では、重合促進剤(I)が用いられる。本発明に用いられる重合促進剤(I)としては、アミン類、スルフィン酸及びその塩、ボレート化合物、バルビツール酸誘導体、トリアジン化合物、銅化合物、スズ化合物、バナジウム化合物、ハロゲン化合物、アルデヒド類、チオール化合物、亜硫酸塩、亜硫酸水素塩、チオ尿素化合物などが挙げられる。
本発明の組成物は、フィラー(J)を含有していてもよい。このようなフィラーは、通常、有機フィラー、無機フィラー及び有機-無機複合フィラーに大別される。有機フィラーの素材としては、例えばポリメタクリル酸メチル、ポリメタクリル酸エチル、メタクリル酸メチル-メタクリル酸エチル共重合体、架橋型ポリメタクリル酸メチル、架橋型ポリメタクリル酸エチル、ポリアミド、ポリ塩化ビニル、ポリスチレン、クロロプレンゴム、ニトリルゴム、エチレン-酢酸ビニル共重合体、スチレン-ブタジエン共重合体、アクリロニトリル-スチレン共重合体、アクリロニトリル-スチレン-ブタジエン共重合体等が挙げられ、これらは単独で又は2種以上の混合物として用いることができる。有機フィラーの形状は特に限定されず、フィラーの粒子径を適宜選択して使用することができる。得られる組成物のハンドリング性及び機械強度などの観点から、前記有機フィラーの平均粒子径は、0.001~50μmであることが好ましく、0.001~10μmであることがより好ましい。
本発明の組成物は、さらにフッ素イオン放出性物質を含んでいてもよい。フッ素イオン放出性物質を配合することによって、歯質に耐酸性を付与することができる組成物が得られる。かかるフッ素イオン放出性物質としては、フッ化ナトリウム、フッ化カリウム、モノフルオロリン酸ナトリウム、フッ化リチウム、フッ化イッテルビウム等の金属フッ化物類等を挙げることができる。
4-META:4-メタクリロイルオキシエチルトリメリテート
6-MHPA:6-メタクリロイルオキシヘキシルホスホノアセテート
HEMA:2-ヒドロキシエチルメタクリレート
4FMA:テトラフルオロプロピルメタクリレート
Bis-GMA:2,2-ビス〔4-(3-メタクリロイルオキシ)-2-ヒドロキシプロポキシフェニル〕プロパン
UDMA:2,2,4-トリメチルヘキサメチレンビス(2-カルバモイルオキシエチル)ジメタクリレート
TEGDMA:トリエチレングリコールジメタクリレート
GDMA:グリセロールジメタクリレート
TMDPO:2,4,6-トリメチルベンゾイルジフェニルホスフィンオキサイド
BAPO:ビス(2,4,6-トリメチルベンゾイル)フェニルホスフィンオキサイド
CQ:カンファーキノン
PDE:p-(N,N-ジメチルアミノ)安息香酸エチル
DEPT:N,N-ジ(2-ヒドロキシエチル)-p-トルイジン
TTA:トリエタノールアミン
無機フィラー1:日本アエロジル社製「R972」
表1~3に記載の各成分を常温下で混合して1液型歯科用接着材組成物を作製した。これらの組成物を用い、後述の方法に従って、接着性試験(1)、接着性試験(2)、均一性評価、吸水性試験、耐着色試験及び環境光安定性試験を行った。組成及び評価結果を表1~3に示す。
ウシ下顎前歯の唇面を流水下にて#80シリコン・カーバイド紙(日本研紙社製)で研磨して、象牙質の平坦面を露出させたサンプルを得た。得られたサンプルを流水下にて#1000のシリコン・カーバイド紙(日本研紙社製)でさらに研磨した。研磨終了後、表面の水をエアブローすることで乾燥した。乾燥後の平滑面に、直径3mmの丸穴を有する厚さ約150μmの粘着テープを貼着し、接着面積を規定した。
ヒト第三大臼歯歯冠部中央を精密低速切断機「アイソメット5000」(Buehler社製)を用いて歯軸に対して垂直に切断して、象牙質の平坦面を露出させたサンプルを得た。得られたサンプルを注水下にて#600のシリコン・カーバイド紙(日本研紙社製)で研磨した。
各成分を常温下で混合後、25℃で10分間静置し、1液型歯科用接着材の各成分が分離または沈降することなく、均一に分散しているかどうかを目視にて評価した。1液型歯科用接着材に含まれる重合性単量体、溶媒、重合開始剤、及び重合促進剤が相互に溶解しており、フィラーを配合した場合には該フィラーが分離、沈降することなく1液型歯科用接着材中に分散して存在しているものを均一とした。
前記1液型接着材にエアーを噴き付け、重量変化がなくなるまで水や有機溶媒を除去し、硬化物作製用サンプルを得た。得られたサンプルを、ポリエステル製フィルムを載置したスライドガラス上に置いたテフロン(登録商標)型(直径10mm、厚さ1mm)に入れ、上からポリエステル製フィルムを置いて、さらにガラス板を用いて軽く押し当てた。その上から前記照射器「JETライト3000」を用いて10秒間光照射を行った後、裏返して同様に10秒間光照射を行ってサンプルを硬化させ、1液型接着材の硬化物を得た。
吸水率=(重量A-重量B)÷重量B×100 (%)
ターメリック(0.005g)〔(株)ギャバン製〕を蒸留水(100mL)の中に入れ、黄色のターメリック懸濁液を作製した。その中に、前記吸水性試験と同様の方法で作製した1液型接着材の硬化物を浸漬した。37℃の恒温機に18時間保管した後、硬化物を取り出し、流水で1分間洗浄した後、硬化物の着色の度合いを目視にて観察した。
前記1液型接着材1滴(約20mg)を混和皿上に採取し、照度8,000ルクスに調整したデンタルライト下に所定時間放置した後、サンプルを筆ですくい上げ、ゲル状物の有無を確認した。測定は10秒間隔で行い、ゲル状物が認められなかった最長の時間を操作余裕時間とした。
Claims (11)
- 前記フルオロカーボン基を有する重合性単量体(B)の含有量が、重合性単量体の全量100重量部の内、0.5~10重量部である請求項1に記載の1液型歯科用接着材組成物。
- 1個の重合性基と1個以上の水酸基を含む重合性単量体(E)を、重合性単量体の全量100重量部の内、10~50重量部さらに含有する請求項1に記載の1液型歯科用接着材組成物。
- 前記重合性単量体(F)の含有量が、重合性単量体の全量100重量部の内、5~20重量部である請求項4に記載の1液型歯科用接着材組成物。
- 前記重合開始剤(D)の含有量が、重合性単量体の全量100重量部に対して、0.001~20重量部である請求項1に記載の1液型歯科用接着材組成物。
- 有機溶媒(H)を含む請求項1に記載の1液型歯科用接着材組成物。
- 重合促進剤(I)を含む請求項1に記載の1液型歯科用接着材組成物。
- フィラー(J)を含む請求項1に記載の1液型歯科用接着材組成物。
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US13/636,167 US9271901B2 (en) | 2010-03-30 | 2011-03-25 | One-part dental adhesive composition |
EP11762215.9A EP2554155B1 (en) | 2010-03-30 | 2011-03-25 | One-pack dental adhesive material composition |
CN201180016281.4A CN102811695B (zh) | 2010-03-30 | 2011-03-25 | 单组份型牙科用粘接材料组合物 |
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JP2018168099A (ja) * | 2017-03-30 | 2018-11-01 | 株式会社ジーシー | 歯科用プライマー及び歯科用補綴物接着用キット |
WO2024043291A1 (ja) * | 2022-08-25 | 2024-02-29 | クラレノリタケデンタル株式会社 | 歯科用接着性組成物 |
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GB201503644D0 (en) * | 2015-03-04 | 2015-04-15 | Johnson Matthey Plc | Tracer and method |
WO2018118962A1 (en) * | 2016-12-20 | 2018-06-28 | 3M Innovative Properties Company | Fluorinated anionic polymers and compositions including them |
CN106726623B (zh) * | 2016-12-28 | 2020-12-04 | 日照沪鸽生物材料有限公司 | 用于牙体修复具有氟离子释放特性的单组分光固化复合材料及其应用 |
CN111714781B (zh) * | 2020-06-24 | 2022-08-05 | 北京夏禾科技有限公司 | 一种牙齿美白组合及其使用方法 |
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EP2554155A4 (en) | 2013-12-25 |
JP4860788B2 (ja) | 2012-01-25 |
US20130012615A1 (en) | 2013-01-10 |
EP2554155B1 (en) | 2020-08-05 |
JPWO2011121966A1 (ja) | 2013-07-04 |
CN102811695B (zh) | 2015-01-07 |
CN102811695A (zh) | 2012-12-05 |
EP2554155A1 (en) | 2013-02-06 |
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