WO2008068862A1 - 歯科用樹脂系セメント組成物 - Google Patents
歯科用樹脂系セメント組成物 Download PDFInfo
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- WO2008068862A1 WO2008068862A1 PCT/JP2006/324354 JP2006324354W WO2008068862A1 WO 2008068862 A1 WO2008068862 A1 WO 2008068862A1 JP 2006324354 W JP2006324354 W JP 2006324354W WO 2008068862 A1 WO2008068862 A1 WO 2008068862A1
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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
- A61K6/20—Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
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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
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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
- A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- A61K6/893—Polyurethanes
Definitions
- the present invention relates to a dental greaves-based cement composition having excellent operability and a method for controlling flow characteristics.
- the flow characteristics can be easily changed easily in the paste-like composition, and the operability is improved.
- dental cement is used for various purposes such as bonding, temporary bonding, filling, temporary sealing, and lining.
- cement to be used is used to attach prosthetics such as crowns and bridges or restorations such as inlays and onlays when the teeth collapse or are lost due to dental caries.
- the thickness of the cement interposed between the tooth and the metal affects the bonding strength or adhesion strength and solubility of the cement.
- This thickness is called the film thickness, and depends on the temperature, powder / liquid ratio, kneading time, kneading method, particle size, and the like.
- the preferred conditions for dental cement are (1) do not irritate the pulp, (2) good operability, (3) high strength when solidified, (4) low dissolution in saliva, (5) teeth There are adhesiveness in the quality, (6) the color is similar to the tooth quality.
- the dental oil-based cement is a cement prepared by mixing at least two pastes having the same or different composition and containing a polymerizable monomer as a constituent component thereof. Due to the resulting flow characteristics, there was a problem that the operability of the paste used for cement was poor.
- a dental grease-based cement composition for a commercial product is a resin for dental bonding consisting of two pastes. Although it is a cement and has good operability such as paste viscosity after kneading, extractability of dripping paste with a spatula, sagging, paste application to prosthesis, etc., the fluidity between the two pastes is completely In contrast, the mixing property between pastes is poor and the kneading property is poor.
- dental adhesive resin cements composed of two pastes, and the fluidity between the two pastes is very similar. Easy operation and good mixing, but low viscosity, so no thixotropy is felt, paste viscosity during kneading is high and stringiness is strong, and kneading paste with spatula etc. Because it is easy to sag, operability is not good. Furthermore, when an automix container is used, the mixing property in the chip having a mixing element at the tip of the container is good, but paste dripping is likely to occur due to the delay in discharging the paste from the tip of the chip. That is clear.
- the dental oil-based cement composition of other commercially available products is a dual-cure type dental adhesive resin cement consisting of two pastes. It has high viscosity and strong spinnability, which causes stress on the workers. Furthermore, it is difficult to work with kneading paste or immediately using a spatula etc., so it cannot be said that it has good operability as cement.
- Special Table 2002-514211 discloses rheological conditions having excellent operability as a dental composition having improved handling performance, as compared with a dental composition related to a specific composition. However, this is a condition for the restorative filler material, and the definition of operability is different compared to dental cement.
- the excellent handling characteristics of the restoration filler material in Special Table 2002— 514211 show no slump, the force is easily adapted to the cavity specimen, and the contour is easily contoured. It generally does not stick to it and can be used quickly and easily for the restoration of tooth structures.
- “Slump” refers to a phenomenon that flows under the action of gravity. After the dentist is placed in the mouth and contoured, the given shape remains unchanged until the material hardens. It is preferred that the dental restorative filler not slump because it desires to remain.
- the cement composition according to the present invention is an adhesive material, and is different from the operability provided by the publication in which an operation such as detention by placing it in the mouth is necessary.
- “Contouring” refers to the process of shaping the restorative filler material with a dental appliance so that the restorative filler material resembles the natural tooth structure. In order to be easily contoured, the material must have a viscosity high enough to maintain its shape after manipulation with dental instruments.
- the cement composition according to the present invention is an adhesive material, and there is no process for forming a restoration filler material with a dental instrument, and therefore the operability given by the publication is different.
- “Fathering” is a force that refers to the process of making the material into a thin film in order to match the restoration filler material to the natural dental condition.
- the cement composition in the present invention is an adhesive material and is given by the publication. The operability is different.
- Special Table 2001-510146 discloses a dental greaves cement composition with improved handling characteristics and rheological conditions with excellent operability. This is a dental mortar cement material related to a specific composition containing a polymer, which is different from the present invention.
- polymers as handling property improvers generally do not disperse in the preferred greaves used conventionally in dental materials, so that sufficient strength and durability required for dental materials cannot be obtained.
- a polymer ultimately reduces the filler filling amount of inorganic fillers, and preferable properties that depend on an organic filler, such as X-ray impermeability, sustained release of fluorine, high elasticity, and transparency. This is not preferable because it causes a decrease in properties.
- dental oil-based cement is provided as a plurality of pastes, so that the final product is a force for kneading.
- the hardened material is affected by the effects of air bubbles and other factors.
- the physical properties are adversely affected and the operational complexity is significant.
- Patent Document 1 Special Table 2002—514211
- Patent Document 2 Special Table 2001-510146
- Patent Document 3 US6820766
- An object of the present invention is to provide a dental oil-based cement composition having good operability and a method for controlling flow characteristics.
- Dental oleaginous cements based on polymerizable monomers have poor operability and are clinically problematic in terms of working time and technical errors o
- operability is a property related to cement properties, and sensuously is kneading operability, fluidity of the kneaded material, etc.
- the composition of the filler for example, the particle composition, particle shape, particle diameter, particle filling amount, particle surface treatment agent, particle surface treatment method, and the like are further controlled by the resin additive.
- changes in the composition of the filler component in the paste composition may greatly reduce the mechanical properties, optical properties, etc. of the cement cured product that will be the final form.
- the operability of the paste composition is a characteristic that easily changes depending on conditions such as ingredients and blending amount. Therefore, a control method and a composition capable of easily and remarkably changing the flow characteristics of a dental greave-based cement composition have been desired.
- the operability of dental cement paste is a property related to paste properties. Yes, it can be expressed sensuously as characteristic values such as kneading operability and fluidity of the kneaded product.
- the required characteristic values related to operability are “mixing”, “kneading resistance”, “dripping”, and “flow resistance”.
- dental cement is generally provided as a semi-finished product, and this is modified to make a finished product. At that time, kneading is performed, but light mixing at the initial stage of kneading is performed. It is necessary to have good mixability between the liquid and the powder or the paste and the paste.
- Kneading resistance generally means that dental cement needs to be mixed strongly with a spatula on a cement kneading board. This mixing operation is called kneading. Or it means the resistance of cement paste and it is necessary that this kneading resistance is low
- “Sagging” means that the kneaded cement paste is then applied to the restoration using a spatula, etc., and this means that the spatula is forced and does not sag. .
- Flow resistance refers to a complex shape when cement paste is fluidized and the prosthesis is smoothly attached when a cementing operation is performed on the application site after application and filling of the cement to the prosthesis. It is a sense of resistance that can reach the corners and edges of the prosthesis
- the cement material is a “sol” in which the dispersion medium is a liquid particle dispersion composition.
- the “sol” should be in a “gel” state that has lost its fluidity.
- dental oil-based cement is provided as a plurality of pastes, and in the clinical field, a polymerization initiator is contained in the paste so as to be a final product. It is difficult.
- the present inventors have found that a polymerizable monomer composition having a specific blending amount, an inorganic compound, or a filler comprising an organic composite containing an inorganic compound,
- a polymerizable monomer composition having a specific blending amount, an inorganic compound, or a filler comprising an organic composite containing an inorganic compound
- at least two types of pastes containing silica fine particles and having a specific yield viscosity and thixotropy index are used.
- the present invention was completed by finding that a greaves-based cement composition and a method for controlling its flow characteristics were obtained.
- the present invention provides the following.
- Dental oil-based cement composition paste as 100 parts by weight (a) 20-50 parts by weight of polymerizable monomer composition, and (b) 50-80 parts by weight of inorganic compound or mineralized A filler composed of an organic composite containing a compound, and (b) the filler is converted into (c ) 2. 0 ⁇ : LO. A paste containing 0 part by weight of silica fine particles,
- a dental oil-based cement composition wherein the at least two types of pastes are mixed and used.
- Dental oil-based cement composition paste as 100 parts by weight (a) 20-50 parts by weight of polymerizable monomer composition, and (b) 50-80 parts by weight of inorganic compound or mineralized
- a filler comprising an organic composite containing a compound, wherein the (b) filler is a paste containing silica fine particles of 0.0 part by weight of (c) 2.0 to L:
- the dental greaves cement composition according to (1) wherein at least two types of pastes are mixed and used.
- the linear constant curve's proportionality constant ⁇ and the coefficient of determination R 2 are calculated, j8 force is within the range of 1.00-15.00, and R 2 is within the range of 0.5 0 to 1.00.
- Dental oil-based cement composition paste as 100 parts by weight (a) 20-50 weight Part of the polymerizable monomer composition, and (b) 50 to 80 parts by weight of an inorganic compound or a filler composed of an organic composite containing an inorganic compound, and (b) the filler (c) 2.0-: LO. Paste containing 0 part by weight of silica fine particles;
- the paste having the yield viscosity of the paste of (d) is 70 to 4000 [Pa's], and the paste having the same property as in the above is selected and used. And controlling the flow characteristics of the dental oil-based cement composition.
- Dental oil-based cement composition paste as 100 parts by weight (a) 20-50 parts by weight of polymerizable monomer composition, and (b) 50-80 parts by weight of inorganic compound or mineralized A filler comprising an organic composite containing a compound, wherein (b) the filler is converted into (c) 2.0 to L: 0.0 part by weight of silica fine particles;
- each of at least two types of pastes When mixing and using at least two of these as a dental oil-based cement composition, each of at least two types of pastes
- the measurement interval includes the shear rate of 0.1 [ s_1 ] and 10 [ s_1 ], and the logarithm of the shear rate is equidistant from 0.l [ s_1 ] to 10 [ s_1 ] Using 20 measurement points in the range.
- the steady flow viscosity at a shear rate of 0.1 [ s_1 ] is defined as the yield viscosity of the paste.
- the thixotropy index is p [Pa 's], the viscosity when the shear rate is 0.1 [ s_1 ].
- n or more types of pastes are dental oil-based cement compositions characterized in that after mixing, a chemical reaction occurs and hardens.
- the dental greaves-based cement composition of the present invention has excellent operability that satisfies various required characteristics such as “mixing”, “kneading resistance”, “dripping”, and “flow resistance” required in the clinical field.
- kneading is automatically performed in a chip having a mixing element at the tip of the container. Since there is no kneading work as described above, it is necessary to ensure kneading within the chip. In order to eliminate kneading failures, dental cement is desired because it is kneadable.
- “kneading resistance” characteristics are important.
- the “kneading resistance” characteristic correlates with the resistance of the paste during the kneading operation.
- the “kneading resistance” property is inferior, the viscosity of the paste is felt high and stress is given to the worker, and the stringiness is strong and kneading is difficult. Therefore, it takes time to mix well, and the long working time increases the burden on patients and doctors and feels stress. Stress to the doctor can cause technic errors.
- the "flow resistance” characteristic is important.
- the ⁇ flow resistance '' characteristic means that the paste flows during the bonding operation, the prosthesis is smoothly bonded without resistance, and the corners and edges of the complex prosthesis are insufficient. It is a characteristic that spreads without any problems. Due to inappropriate “flow resistance” characteristics, prosthetics are likely to lift. Loss to the patient due to prosthetic lift may cause secondary caries as well as initial loss due to large aesthetics and incompatible occlusion, as well as long-term loss that may cause deterioration of the prosthesis .
- the kneaded cement paste is then applied and filled into the prosthesis using a spatula or the like, but it is necessary that the spatula or the like does not drip.
- the “sag” characteristic in the present invention is important.
- the “sagging” property which is inappropriate for physicians, makes it difficult to remove excess cement after the prosthesis has been installed, which can be lengthy and stressful. When removing excess cement, it is necessary to form a lump without dripping the cement.
- due to inappropriate “sagging” characteristics there is a risk that unpolymerized greaves will come into contact with the oral mucosa and cause allergies due to the paste dripping in the oral cavity.
- the operability is improved. It is easy to improve the flow characteristics of the paste, which correlates with good.
- polymerizable monomer composition (a) a monofunctional or polyfunctional polymerizable monomer generally used as a dental composition can be used.
- monofunctional polymerizable monomers include hydrocarbon esters of methacrylic acid, such as
- Methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, and the like, and acrylates corresponding to these methacrylates, preferably methyl methacrylate are used,
- Monofunctional polymerizable monomers containing a hydroxyl group include 2-hydroxyethyl methacrylate, 2 or 3-hydroxypropinoremetatalylate, 4-hydroxybutinoremethacrylate, diethylene glycol mono Metatalylate, dipropylene glycol monometatalylate, glycidyl metatalylate, tetrahydrofurfuryl metatalylate, allyl metatalylate, etc., and acrylates corresponding to these metatalates, preferably 2-hydroxyethyl methacrylate Talirate is used.
- polyfunctional polymerizable monomer as the bifunctional monomer, as the polymetatalate of the alkane polyol, ethylene glycol dimethacrylate, propylene glycol dimethacrylate, neopentyldaricol dimetatalate, etc. , And acrylates corresponding to these metatalates, preferably ethylene glycol dimetatalate,
- polyoxyalkane polyol polymethacrylate examples include diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, dipropylene glycol dimethacrylate, and the like, and acrylates corresponding to these metatallates, preferably triethylene glycol dimethacrylate.
- a bifunctional metatalylate having a urethane bond obtained by an addition reaction of 1 mol of diisocyanate compound and 2 mol of a hydroxyl group-containing metatalylate such as 2-hydroxychetylmethalate, And the attalates corresponding to these metatarates,
- trimethylolpropane trimetatalylate trimethylolethane trimethacrylate, pentaerythritol trimetatalylate, trimethylol methane trimethacrylate, etc.
- acrylates corresponding to these metatalylates Preferably, trimethylol propane trimetatalylate and the like are used.
- tetrafunctional monomer pentaerythritol tetrametatalylate, tetrafunctional urethane methacrylate, attalylate corresponding to these metatalates and the like are used.
- a pentafunctional or higher monomer may be used.
- These monofunctional or polyfunctional polymerizable monomers can be used alone or in combination of two or more.
- fillers generally used for dental composite materials can be used.
- the inorganic filler silica, aluminum silicate, alumina, zirconium silicate, zirca, titer, various glasses (fluorine glass, borosilicate glass, soda glass, norium glass, norlium Aluminum silica glass, glass containing strontium gallium, glass ceramics, fluoroaluminosilicate glass, and sol-gel synthetic glass), Aerosil (registered trademark), calcium fluoride, strontium fluoride , Calcium carbonate, kaolin, clay, mica, aluminum sulfate, calcium sulfate, barium sulfate, titanium oxide, calcium phosphate, hydroxyapatite, calcium hydroxide, strontium hydroxide, zeolite and the like. Further, agglomerated particles of a plurality of inorganic oxides such as composite inorganic oxide particles as disclosed in JP-A-2001-302429 can also be mentioned.
- Examples of the organic filler include polymethyl methacrylate (PMMA) and polymethacrylate. Examples include chill, polypropyl methacrylate, polybutyl methacrylate, poly (butyl acetate), polyethylene glycol, polypropylene glycol and poly (bull alcohol).
- the organic composite filler the surface of the previous inorganic filler is polymerized and coated with a compound as exemplified by the polymerizable monomer and then pulverized to an appropriate particle size, or preliminarily formed into a polymerizable monomer. Examples thereof include particles obtained by an operation such as emulsion polymerization or suspension polymerization after containing an inorganic filler.
- These fillers are preferably surface-treated with a known titanate coupling agent, aluminate coupling agent or silane coupling agent.
- a known titanate coupling agent aluminate coupling agent or silane coupling agent.
- silane coupling agent include ⁇ -methacryloxypropyltrimethoxysilane, ⁇ -methacryloxypropyl triethoxysilane, and the like.
- ⁇ -methacryloxypropyltrimethoxysilane is used.
- the amount of the (b) filler component used in the present invention is in the range of 50 to 80 parts by weight of the filler component in the paste, and preferably in the range of 55 to 75 parts by weight.
- the amount of the (b) filler component used in the present invention is less than 50 parts by weight of the filler component in the paste, the high strength, high elasticity, and high strength required as a dental cement material are required. X-ray impermeability, low polymerization shrinkage, sustained release of fluorine, etc. are insufficient and inappropriate.
- the amount of the component (b) filler component used in the present invention is more than 80 parts by weight of the filler component in the paste, the paste viscosity is very high and good operability is obtained. It is difficult and inappropriate to obtain.
- the filler used in the present invention contains (c) silica fine particles, and the silica fine particles have a primary particle average particle size of 0.1 to LOONm, preferably, Hydrophobic silica fine particles having an average primary particle size of 10 to 50 nm.
- hydrophobic silica fine particles are fine silica powder surface-treated with a silane coupling agent and Z or modified silicone oil.
- the silica fine powder is treated with the silane coupling agent and Z or modified silicone oil, or at the same time. You may process with a property improvement agent. Hydrophobic that can be used for this
- the improver is an organosilicon compound that reacts or physically adsorbs with fine silica powder, and examples thereof include hexamethyldisilazane, dimethylpolysiloxane, methylchlorosilane, alkyltrialkoxysilane, and dialkyldialkoxysilane.
- the silica fine powder is more preferably force dry silica exemplified by dry silica, silica gel and wet silica.
- silica fine powders dry silica is produced and marketed, for example, by Nippon Aerosil Co., Ltd. under the trade name Aerosil.
- silica powder sold under the trade name such as Cab-0-Sil manufactured by Cabot Corporation of the United States and HDK manufactured by hacker Corporation of Germany can also be used.
- the amount of component of the silica fine particles used in the present invention is in the range of 2.0 to 0.0 parts by weight of the silica fine particle component in the paste-like composition, and the yield viscosity of the paste is 100 to 3000 [ Pa's] and is appropriately blended so that the thixotropy index of the paste is 3.0 or more.
- the dental oil-based cement composition of the present invention includes a polymerizable monomer, a filler, and a polymerization initiator as its constituent components, and other components can be appropriately selected and added.
- an additive component that is, water, an organic solvent, a polymerization inhibitor, a pigment, an antibacterial material, and the like may be appropriately blended depending on the application.
- the polymerization initiator used in the present invention is generally used as a dental composition, and a compound can be used.
- the polymerization initiator is generally classified into a chemical polymerization initiator and a photopolymerization initiator.
- Specific examples of the chemical polymerization initiator include benzoyl peroxide, parachlorobenzoyl peroxide, 2,4-dichlorobenzoyl peroxide, acetylyl peroxide, lauroyl peroxide, tertiary butyl peroxide, Cumene Hyde Mouth Peroki Side, 2, 5 dimethyl hexane 2, 5 Azo compounds are preferably used.
- the amine group is an aryl group.
- a bonded secondary or tertiary amine is preferably used in terms of curing acceleration.
- N, N—dimethyl-P toluidine, N, N dimethylarine, N, N—j8-hydroxyethyl-aline, N, N di (j8-hydroxyethyl) monoline, N, N di (j8-hydroxyethyl) -p toluidine, N-methyl-a-line, N-methyl-p-toluidine and the like are preferred.
- a sulfinate or a borate with the combination of the organic peroxide and the amine compound.
- strong sulfinates include sodium benzenesulfinate, lithium benzenesulfinate, and sodium ptoluenesulfinate.
- borates include trialkylphenol boron, trialkyl (p fluorophenyl) boron (alkyl group). N butyl group, n-octyl group, n-dodecyl group, etc.) sodium salt, lithium salt, potassium salt, magnesium salt, tetrabutyl ammonium salt, tetramethyl ammonium salt and the like.
- organoboron compounds such as tributylborane and tributylborane partial acid oxides that generate radicals by reaction with oxygen and water can also be used as organic metal type polymerization initiators.
- a photosensitizer that generates radicals by light irradiation can be used as the photopolymerization initiator.
- photosensitizers for ultraviolet rays include benzoin compounds such as benzoin, benzoin methyl ether and benzoin ether, benzophenone compounds such as acetoin benzophenone, p-clobenzobenzoneone and p-methoxybenzophenone, Thioxanthone compounds such as thixanthone, 2-cyclothioxanthone, 2-methylthioxanthone, 2-isopropylthioxanthone, 2-methoxythixanthone, 2-hydroxythixanthone, 2,4-jetylthioxanthone, 2,4 diisopropylthixanthone, etc.
- Photosensitizers that initiate polymerization with visible light are harmful to the human body. Since it does not require ultraviolet rays, it is preferably used. Examples of these are benzyl, camphorquinone, ⁇ -naphthinole, acetonaphthene, ⁇ , ⁇ , monodimethoxybenzyl, ⁇ , ⁇ , monodichlorobensylacetyl, pentanedione, 1,2 phenanthrenequinone, 1,4 phenanthrenequinone. 3, 4-phenanthrenequinone, 9, 10 phenanthrenequinone, a-diketones such as naphthoquinone.
- camphor quinone is used.
- a photopolymerization accelerator in combination with the photosensitizer.
- a tertiary amine when used as a photopolymerization accelerator, it is more preferable to use a compound in which a nitrogen atom is directly substituted for an aromatic group.
- Possible photopolymerization accelerators include N, N dimethylaniline, N, N-jetylaniline, N, N di-n-butylaniline, N, N-dibenzylaniline, N, N-dimethyl-p-toluidine, N , N Dimethyl-m-toluidine, N, N Jetyl-p toluidine, p-bromo N, N dimethylaniline, m-chloro-N, N dimethylamino-line, p-dimethylaminobenzaldehyde, p-dimethylaminoacetophenone, p-dimethylaminoben Zoic Acid, p Dimethylaminobenzoic Acid Ethyl Ester, p Dimethylaminobenzoic Acid Amino Ester, N, N Dimethylanthranilic Acid Methyl Ester, N, N-Dihydroxyethyl Nylon, N, N Dihydroxyethyl-p-toluidine
- photopolymerization accelerators include 5-butyl barbituric acid, 1 benzyl 5 barbarbituric acid such as 5-barbarbituric acid, dibutinoretin tin diacetate, dibutinoretin tin dimaleate, dioctinole tin dijima.
- tin compounds such as reate, dioctyl-tin-dilaurate, dibutyl-tin-dilaurate, dioctyl tin-diversate, dioctyl-tin s, s, monobisisooctyl mercaptophosphate, tetramethyl-1,3 diacetoxy distanoxane, etc.
- photopolymerization accelerators at least one kind can be selected and used, and two or more kinds can also be mixed and used.
- the dental oil-based cement is composed of a plurality of compositions, usually two compositions.
- the kneading work is conventionally performed on a kneaded paper, using a spatula, etc.
- recently containers with mixing elements ie automix containers, may be used.
- the composition mode consists of two pastes, and the kneading work is automatically performed in a chip having a mixing element at the tip of the container. This is characterized by the fact that there is no complexity, but it is necessary to perform kneading without fail in the chip. If sufficient kneading is not performed, the high mechanical properties, high V, adhesive properties, etc., which are the characteristics of dental oil-based cement, as described above, cannot be obtained.
- the proportionality constant j8 is obtained by the least square force and is expressed by the following equation (3).
- the coefficient of determination R 2 (sum of squares of estimated values) / (sum of squares of y).
- the coefficient of determination represents the power that the independent variable can explain how much of the dependent variable.
- a low value means that the resulting “estimated curve” has a low predictive ability (Snedecker Cochran (translated by Hatamura, Okuno, Tsumura), “Statistical Method Book 6th Edition”, Iwanami Shoten, 1972 Chapter 6 section 18 “Fitting a straight line through the origin”).
- the coefficient j8 and, R 2 if the viscosity value of 20 points of the first paste and the second paste all exactly the same, that is, when referring to the same flow behavior, the linear approximation curve passing through the origin.
- the proportionality constant j8 and the coefficient of determination R 2 are both 1.
- the dental oil-based cement composition in the present invention includes a polymerizable monomer, a filler, and a polymerization initiator as its constituent components, and other components can be appropriately selected and added.
- an additive component that is, water, an organic solvent, a polymerization inhibitor, a pigment, an antibacterial material, and the like may be appropriately blended depending on the application.
- the polymer is not blended in order to ultimately reduce the filling amount of the inorganic filler.
- preferred properties depending on the inorganic filler such as X-ray impermeability, sustained release of fluorine, high elastic modulus, transparency, and the like are lowered.
- the polymer since the polymer is generally not dispersed in the preferred rosin system conventionally used in dental materials, the strength and durability required for dental materials cannot be sufficiently obtained.
- the method for controlling the flow characteristics of the dental oil-based cement composition of the present invention is as follows. 50 parts by weight of a polymerizable monomer composition, and (b) 50-80 parts by weight of an inorganic compound or a filler composed of an organic composite containing an inorganic compound, the (b) filler In terms of conversion, at least two types of (c) 2. 0-10. 0 parts by weight of silica fine particle paste are mixed and used as a dental greaves-based cement composition. ,
- the paste of (d) has a yield viscosity of 70 to 4000 [Pa's], and the same paste as in (1) above is selected and used.
- polymerizable monomer composition filler and silica fine particles, yield viscosity and thixotropy index are the same as defined above.
- at least two kinds of pastes containing the polymerizable monomer composition, the filler and the silica fine particles of these blending amounts are mixed, and one force yield viscosity of at least two kinds of pastes is 100 to 300.
- a method for controlling the flow characteristics of a greave-based cement composition is provided.
- the method for controlling the flow characteristics of the dental oil-based cement composition of the present invention is as follows: (a) 20 to 50 in terms of 100 parts by weight of the dental oil-based cement composition paste. Parts by weight of a polymerizable monomer composition, and (b) 50-80 parts by weight of an inorganic compound or a filler made of an organic composite containing an inorganic compound, and the (b) filler is the above-mentioned conversion
- the paste has a yield viscosity of 100 to 3000 [Pa's], (e) the thixotropy index of the paste is 3.0 or higher;
- the method of the present invention at least two kinds of pastes containing the polymerizable monomer composition, the filler, and the silica fine particles of these compounding amounts are mixed, and each of the at least two kinds of pastes has a yield viscosity.
- a method of controlling the flow characteristics of a dental greaves-based cement composition that is used by selecting a paste having a 100 to 3000 [Pa's] and a thixotropy index of 3.0 or more.
- the paste in the two types of pastes yield small viscosity paste as a first paste, when the other was a second paste, shear rate 0. l [s _1] and includes 10 [s _ 1], and the logarithm of the shear rate equal intervals For the 20 viscosity values of each paste, determined using 20 measurement points in the range from 0.
- camphorquinone as a photopolymerization initiator was added to the pastes of Example 1 17 and Comparative Example 118 shown in Table 1 and p-dimethylaminobenzoyl ethyl benzoate was used as a photopolymerization accelerator. Part by weight was included.
- an amorphous glass filler having an average particle diameter of 1 ⁇ m and / or 3 ⁇ m which was surface-treated with ⁇ -methacryloxypropyltrimethoxysilane was used as a filler component other than silica fine particles.
- Table 1 shows the blending amounts of the filler components in Examples and Comparative Examples.
- Table 1 shows the blending amounts of the filler components in Examples and Comparative Examples.
- a stress tech rheometer manufactured by Rheologica was used.
- the measurement environment is 23 ° C and atmospheric pressure.
- the measurement interval includes a shear rate of 0.1 [ s_1 ] and 10 [ s_1 ], and the logarithm of the shear rate is equidistant from 0.l [ s_1 ] to 10 [ s_1 ] Using 20 measurement points in the range.
- the steady flow viscosity at a shear rate of 0.1 [ s_1 ] is defined as the yield viscosity of the paste.
- the thixotropy index is p [Pa's], the viscosity at a shear rate of 0.1 [ s_1 ].
- Table 1 shows the yield viscosity and thixotropy index of the paste.
- ⁇ 3 ⁇ 4 means that the cement paste that has been turned into a restoration is then applied using a spatula or the like.
- ⁇ is generally used as a ftf dough cement, and it is treated as a genuine product by adding a hand to it. It is the operability when mixing lightly, and it is judged from the nature of “I'll do a single strike”.
- dental grease-based cements are provided as a plurality of pastes.
- the final form is a plurality of bases.
- Table 3 lists the criteria for the evaluation scale of questionnaire survey 1.
- Experiment No. 17 is a dental oil-based cement composition containing (a) 20 parts by weight of a polymerizable monomer composition component and (b) 80 parts by weight of a filler component.
- Example 1 In Example 1 and Example 2, (d) 2.0 weight of silica fine particle component was added so that the yield viscosity was in the range of 100 to 3000 [Pa's]. And (e) the thixotropy index is selected to be 3.0 or more in the paste composition. ing.
- Examples 7 and 8 were the highest evaluation for all questionnaire items, and had particularly good operability.
- Comparative Example 6-8 which does not satisfy the requirements (a) — (e) at the same time, is poor in operability.
- thixotropy index was selected to be 3.0 or more.
- Silica fine particle component was 2.0 to: LO. 0 parts by weight
- D the yield viscosity is adjusted within the range of 100 to 3000 [Pa ⁇ s].
- Example 11 For Example 11, (c) silica fine particle component was added more in comparison with Examples 9 and 11, and (d) the yield viscosity was relatively high. The “kneading resistance” and “kneading” characteristics were inferior to those of Examples 9 and 12.
- the silica fine particle content was 8.3 to: L 1.5 parts by weight If the amount is relatively large, a decrease in “kneading resistance” and “kneading” characteristics is recognized due to an excessive increase in yield viscosity, and the operability is poor.
- the silica fine particle content is as small as 0.8 part by weight.
- “Sagging” refers to whether or not the kneaded cement paste is then applied and filled into the restoration using a spatula, etc., but at that time, it does not sag from the spatula.
- kneading resistance generally means that dental cement must be mixed strongly with a spatula on a cement kneading board. This mixing operation is called kneading. This means the resistance of the paste, and whether this kneading resistance is low.
- dental cement is provided as a semi-finished product, and this is modified to make a finished product. At that time, kneading is performed. Whether the paste and paste are well kneaded or not.
- Table 4 Assessment scales and corresponding scores [0138] Table 5 shows the criteria for the evaluation scale of Questionnaire 2.
- (d) is small breakdown viscosity of the paste! / to the paste as a first paste, when the other was a second paste, shear rate 0. l [s _ 1] and includes 10 [s _1], and from 0. as the logarithm of the shear rate equal intervals l [s _1], 10 defined by have use the 20 measurement points in the range of [s _1], the 20 viscosity values of each paste
- proportional constant j8 is 1. 00-15 00, the coefficient of determination R 2 0 50:.. Is referred to as requirements when within range of L 00 (!).
- Comparative Examples 17 and 21-22 cannot be said to have good operability. In this case, the requirements (a) — (e) are satisfied, but (1) Not satisfied.
- Test numbers 72-74, 77-78, 80-81, 83-88! / A two-component dental oil system based on the combination of paste 15 and it comparison Describes the results of questionnaire survey 2 and questionnaire survey 3 as operability evaluation of cement composition.
- results of Questionnaire Survey 2 for Comparative Examples 34-36, 39-40, 41-42, 43-48 were all poor, and operability as a dental oil-based cement composition was inappropriate. Met. Furthermore, with regard to Questionnaire Survey 3, the mixing property and Z or ejection properties were poor, and the operability as a dental grease-based cement composition was inappropriate. Therefore, as a two-component dental oil-based cement composition, it is relatively new in terms of operability as a conventional kneading type supply system, but an automix container as a supply system. In spite of that, although it has good operability, it can be determined that it is inappropriate.
- results of Questionnaire Survey 3 in Examples 52-57 are determined to be good, and it can be determined that the automix container as a new supply system also has good operability.
- each paste of the two types of pastes satisfies the requirements (a) — (e), and further satisfies the requirements for the combination of pastes (D simultaneously) There is a need.
- Example 1 Example 1 2 2 2 1 5 Good 1. 18 0. 81 Good Good Good
- Example 15 2-2-2 -2 Defect 92.16 0.21 Defect Defect Defect
- both the first and second pastes satisfy the requirements (a)-(c) and (e) and Combine the pasta in the range of 100 to 3000 [Pa ⁇ s], and 70 to 4000 [P a 's] for the degree (d): 3 ⁇ 4r 3 ⁇ 4 ⁇ , hand »type supply
- As a result of the system operation it was found that good questionnaire results were obtained and that these key systems could be used.
- the dental rosin cement composition having excellent operability, which contributes to shortening the working time, reducing technical errors, etc. by the dental rosin cement composition of the present invention and the method for controlling the flow characteristics thereof, is provided. Can be provided.
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Veterinary Medicine (AREA)
- Plastic & Reconstructive Surgery (AREA)
- Dental Preparations (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/448,049 US20090301346A1 (en) | 2006-12-06 | 2006-12-06 | Dental resin-based cement composition |
DE112006004170T DE112006004170T5 (de) | 2006-12-06 | 2006-12-06 | Zahnzement-Zusammensetzung auf Harzbasis |
JP2008548148A JP5036728B2 (ja) | 2006-12-06 | 2006-12-06 | 歯科用樹脂系セメント組成物 |
PCT/JP2006/324354 WO2008068862A1 (ja) | 2006-12-06 | 2006-12-06 | 歯科用樹脂系セメント組成物 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/324354 WO2008068862A1 (ja) | 2006-12-06 | 2006-12-06 | 歯科用樹脂系セメント組成物 |
Publications (1)
Publication Number | Publication Date |
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WO2008068862A1 true WO2008068862A1 (ja) | 2008-06-12 |
Family
ID=39491781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/324354 WO2008068862A1 (ja) | 2006-12-06 | 2006-12-06 | 歯科用樹脂系セメント組成物 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090301346A1 (ja) |
JP (1) | JP5036728B2 (ja) |
DE (1) | DE112006004170T5 (ja) |
WO (1) | WO2008068862A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010046266A (ja) * | 2008-08-21 | 2010-03-04 | Tokuyama Dental Corp | 歯列矯正用接着材 |
WO2013088921A1 (ja) * | 2011-12-15 | 2013-06-20 | 株式会社トクヤマデンタル | 有機無機複合材、その製造方法、歯科用材料および骨代替材料 |
EP4062895A1 (en) | 2021-03-12 | 2022-09-28 | Shofu Inc. | Dental photocurable composition excellent in operability and storage stability |
US11622916B2 (en) | 2021-03-12 | 2023-04-11 | Shofu Inc. | Photocurable composition excellent in curing depth |
US11779524B2 (en) | 2020-03-16 | 2023-10-10 | Kabushiki Kaisha Shofu | Photopolymerization initiator comprising an aryliodonium salt for dental photocurable compositions |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101228290B1 (ko) | 2010-04-30 | 2013-02-01 | (주) 베리콤 | 요변성과 주형성이 우수한 치과용 복합체 조성물 |
KR20230128855A (ko) * | 2022-02-28 | 2023-09-05 | (주) 베리콤 | 치과용 수복재 조성물 및 그의 제조방법 |
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JPS6183108A (ja) * | 1984-08-02 | 1986-04-26 | ペントロン コ−ポレ−シヨン | 硬化性歯科用修復材 |
JP2005170813A (ja) * | 2003-12-09 | 2005-06-30 | Tokuyama Corp | 歯科用硬化性組成物 |
JP2005523072A (ja) * | 2002-04-18 | 2005-08-04 | スリーエム イノベイティブ プロパティズ カンパニー | 2液型接着剤を用いた歯列矯正ブラケット |
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JPH0627047B2 (ja) * | 1988-12-16 | 1994-04-13 | 而至歯科工業株式会社 | 歯科用グラスアイオノマーセメント組成物 |
US5918772A (en) | 1995-03-13 | 1999-07-06 | Wilhelm A. Keller | Bayonet fastening device for the attachment of an accessory to a multiple component cartridge or dispensing device |
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JP3478521B2 (ja) * | 1997-02-17 | 2003-12-15 | 株式会社トクヤマ | 歯科用軟質裏装材 |
US6506816B1 (en) | 1997-07-17 | 2003-01-14 | 3M Innovative Properties Company | Dental resin cements having improved handling properties |
DE19912251A1 (de) * | 1999-03-18 | 2000-09-21 | Espe Dental Ag | Zweikomponentige Zubereitungen zur Herstellung von zahntechnischen Modellen |
US6183593B1 (en) * | 1999-12-23 | 2001-02-06 | Closure Medical Corporation | 1,1-disubstituted ethylene adhesive compositions containing polydimethylsiloxane |
JP2001302429A (ja) | 2000-04-28 | 2001-10-31 | Shiyoufuu:Kk | 凝集物を含有する歯科用複合組成物 |
US6660784B2 (en) * | 2000-09-26 | 2003-12-09 | Tokuyama Corporation | Dental catalyst for chemical polymerization and use thereof |
EP1471875A1 (en) * | 2002-01-31 | 2004-11-03 | 3M Innovative Properties Company | DENTAL PASTES, DENTAL ARTICLES, AND METHODS |
JP4794201B2 (ja) * | 2005-04-25 | 2011-10-19 | 株式会社松風 | 2ペースト型グラスアイオノマー系セメント |
JP2007091607A (ja) * | 2005-09-27 | 2007-04-12 | Gc Corp | 歯科用ペースト系グラスアイオノマーセメント組成物 |
-
2006
- 2006-12-06 WO PCT/JP2006/324354 patent/WO2008068862A1/ja active Application Filing
- 2006-12-06 US US12/448,049 patent/US20090301346A1/en not_active Abandoned
- 2006-12-06 DE DE112006004170T patent/DE112006004170T5/de not_active Ceased
- 2006-12-06 JP JP2008548148A patent/JP5036728B2/ja active Active
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JPS6183108A (ja) * | 1984-08-02 | 1986-04-26 | ペントロン コ−ポレ−シヨン | 硬化性歯科用修復材 |
JP2005523072A (ja) * | 2002-04-18 | 2005-08-04 | スリーエム イノベイティブ プロパティズ カンパニー | 2液型接着剤を用いた歯列矯正ブラケット |
JP2005170813A (ja) * | 2003-12-09 | 2005-06-30 | Tokuyama Corp | 歯科用硬化性組成物 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010046266A (ja) * | 2008-08-21 | 2010-03-04 | Tokuyama Dental Corp | 歯列矯正用接着材 |
WO2013088921A1 (ja) * | 2011-12-15 | 2013-06-20 | 株式会社トクヤマデンタル | 有機無機複合材、その製造方法、歯科用材料および骨代替材料 |
US9512280B2 (en) | 2011-12-15 | 2016-12-06 | Tokuyama Dental Corporation | Organic/inorganic composite, manufacturing method therefor, dental material, and bone substitute material |
US11779524B2 (en) | 2020-03-16 | 2023-10-10 | Kabushiki Kaisha Shofu | Photopolymerization initiator comprising an aryliodonium salt for dental photocurable compositions |
EP4062895A1 (en) | 2021-03-12 | 2022-09-28 | Shofu Inc. | Dental photocurable composition excellent in operability and storage stability |
US11622916B2 (en) | 2021-03-12 | 2023-04-11 | Shofu Inc. | Photocurable composition excellent in curing depth |
US11622917B2 (en) | 2021-03-12 | 2023-04-11 | Shofu Inc. | Dental photocurable composition containing high soluble photoacid generator |
US11696874B2 (en) | 2021-03-12 | 2023-07-11 | Shofu Inc. | Dental photocurable composition excellent in color tone selectivity |
US12011490B2 (en) | 2021-03-12 | 2024-06-18 | Shofu Inc. | Dental photocurable composition excellent in operability and storage stability |
Also Published As
Publication number | Publication date |
---|---|
JPWO2008068862A1 (ja) | 2010-03-18 |
JP5036728B2 (ja) | 2012-09-26 |
US20090301346A1 (en) | 2009-12-10 |
DE112006004170T5 (de) | 2009-10-15 |
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