WO2015167038A1 - Composition de matériau d'empreinte dentaire ayant des propriétés mécaniques améliorées - Google Patents

Composition de matériau d'empreinte dentaire ayant des propriétés mécaniques améliorées Download PDF

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WO2015167038A1
WO2015167038A1 PCT/KR2014/003762 KR2014003762W WO2015167038A1 WO 2015167038 A1 WO2015167038 A1 WO 2015167038A1 KR 2014003762 W KR2014003762 W KR 2014003762W WO 2015167038 A1 WO2015167038 A1 WO 2015167038A1
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impression material
material composition
cps
organopolysiloxane
filler
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PCT/KR2014/003762
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English (en)
Korean (ko)
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오명환
김영주
이혜옥
김윤기
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(주) 베리콤
오명환
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Priority to PCT/KR2014/003762 priority Critical patent/WO2015167038A1/fr
Publication of WO2015167038A1 publication Critical patent/WO2015167038A1/fr

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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
    • A61K6/896—Polyorganosilicon compounds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/90—Compositions for taking dental impressions

Definitions

  • the present invention relates to a dental impression material composition with improved mechanical properties.
  • the dental impression material is a material used to 'make a pattern', that is, to replicate the oral tissue in the oral cavity, the process requires very precise and meticulous work.
  • high safety is required above all.
  • impression materials can precisely replicate teeth or tissues, have no unpleasant taste, odor, toxicity, irritation and allergic reactions, and need to be stable to proper flow, elasticity and size change. In addition, it must have sufficient mechanical strength to resist tearing or permanent deformation when removed in the oral cavity, and there should be no size change or physical change after disinfection. In addition, the impression material is required to have good compatibility with the model material, to ensure sufficient working time, ease of storage and strong discoloration.
  • Such dental impression materials can be broadly classified into elastic impression materials, inelastic impression materials, and reversible and irreversible impression materials.
  • the elastic impression material is effective in acquiring the impression of teeth or teeth because the oral cavity or the recessed portion can be accurately reproduced in its original form.
  • Such elastic impression materials are mainly classified into hydrocolloid impression materials and rubber impression materials.
  • Such hydrocolloid impression material has sufficient strength and elastic deformation, but since most of the volume is water, it shrinks when water is lost and expands when water is supplied, which affects the size safety of the impression material.
  • the rubber impression material is a precision impression material having excellent elasticity made of synthetic rubber, and is used most frequently because of relatively stable volume change.
  • the rubber impression material may be classified into polysulfide, polyether, condensation silicone, and polyvinyl siloxane according to chemical composition.
  • the addition-polymerization silicone rubber impression material is a material developed to solve the shrinkage of the condensation-polymerization silicone, is odorless, easy to mix, does not color on clothes, and the working time and the curing time are 6 to 8 minutes. It is so short that it can delay the polymerization reaction, it is possible to use the retardant, it has low tear resistance but very little permanent deformation.
  • the addition polymerization type silicone has excellent size stability, so that a duplicate model can be obtained several times in the same impression after making the plaster model.In the case of hydrophilic addition polymerization silicon, it is possible to obtain a precise impression even if the abutment has moisture. As it can flow, it has a feature to prevent the inflow of bubbles.
  • the rubber impression material may be classified into a light body, a regular body, a heavy body, and a putty body according to the consistency of the store.
  • the light body is used for abutment injection
  • the reqular body has a medium fluidity, so it can be used as a monophase or single viscosity technique.
  • Typical examples of reqular bodies include polyethers and addition polymerized silicones. These materials have pseudoplastic properties, i.e., the higher the shear stress on the material, the better the flowability. Properties can be used.
  • the high viscosity is high density and viscosity can not be precise impression acquisition only by the high viscosity impression material composition, it is mainly used as a tray material, putty (putty body) is the dough material of the highest density, This is also used for trays.
  • Such rubber impression materials can be produced by mixing impression materials with different store owners. Generally, the final impression is obtained by combining two store owner impression materials, while the low store owners are used for injecting abutment into a syringe. Larger store occupants are placed in a tray and covered with a syringe material, or used to obtain a double phase.
  • the addition polymerization type polyvinyl siloxane impression material which is showing the most advancement among rubber impression materials, has excellent elastic recovery rate, tear strength, creep characteristics and dimensional stability, high precision, and small size change after curing. It has the advantage of excellent elastic recovery due to short working time and hardening time.
  • the price is relatively expensive, and it is very rigid (rigid), so it is difficult to obtain the impression of the depression.
  • U.S. Patent Nos. 5,661,222, 5,955,513, and 5,830,951 describe a VQM resin having a vinyl group content of 0.16 mmole / g to 0.24 mmole / g of QM resin or vinyl to solve this problem.
  • the technique of increasing the tensile strength by using is proposed.
  • VQM resin when using at least 20% by weight of VQM resin, there is a problem that the economic burden on the consumer may be increased.
  • EP 1475069 discloses an impression material having improved tensile strength by using a silane-treated chain extender and various organopolysiloxane mixtures.
  • the impression material of the European registered patent shows 55 mm to 60 mm larger than the point viscosity value (41 mm to 48 mm) of the light body having the lowest viscosity, and the viscosity is too high to be used as a commercial impression material. There is a low problem.
  • reinforcing synthetic filler is added to improve the physical properties in the production of polyvinylsiloxane dental rubber impression material.
  • fumed silica is mainly used as a reinforcing synthetic filler. Fumed silica is usefully used as an additive for addition polymerization type silicone polymers to enhance strength, control viscosity, and give thixotropy, but due to the fine particle size, problems of fluidity decrease due to viscosity increase, filler cohesion problem and homogeneity The mixing is very difficult and the use content is limited.
  • dental impression materials must meet a variety of physical properties and require the use of inexpensive materials.
  • the patient may complain when the elasticity is insufficient, and when the tear strength and tensile strength are low, the impression material is easily torn, thus making a precise impression.
  • the difficulties of production are still not solved.
  • the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
  • an organic-inorganic hybrid composite made by combining a nano-sized fumed silica and an organopolysiloxane with a modified surface as a dental impression material composition.
  • a nano-sized fumed silica and an organopolysiloxane with a modified surface as a dental impression material composition.
  • it contains it confirmed that it had the outstanding high strength characteristic, such as high elongation and high tear, and came to complete this invention.
  • the dental impression material composition according to the present invention comprises an organopolysiloxane, an organic-inorganic hybrid composite, a filler, a curing agent, a curing retardant, a crosslinking agent and a surfactant, and the organic-inorganic hybrid composite is polyvinyl
  • the organic-inorganic hybrid composite is composed of 5% by weight to 50% by weight based on the total weight of the impression material composition, wherein the organopolysiloxane including vinyl group is graft-polymerized on nano-sized fumed silica dispersed in siloxane. Characterized in that it is included.
  • the dental impression material composition according to the present invention is graft polymerization of organopolysiloxane containing vinyl groups in nano-sized fumed silica dispersed in polyvinylsiloxane in addition to fillers in order to enhance mechanical strength while having appropriate point viscosity.
  • organopolysiloxane containing vinyl groups in nano-sized fumed silica dispersed in polyvinylsiloxane in addition to fillers in order to enhance mechanical strength while having appropriate point viscosity.
  • the organopolysiloxane includes a vinyl group
  • the rubber impression material is manufactured by mixing a low viscosity and a high viscosity, so it is advantageous to control the physical properties of the impression material, the organopolysiloxane including the vinyl group, Monomer having a viscosity of 100 cPs to 1,000 cPs and a vinyl group content of 0.11 mmole / g to 0.40 mmole / g at 25 ° C, a viscosity of 1,000 cPs to 10,000 cPs and a vinyl group content of 0.05 mmole / g to 0.11 at 25 ° C
  • the organopolysiloxane has at least two aliphatic unsaturated hydrocarbon groups in one molecule, a first organopolysiloxane having a viscosity of 10,000 cPs to 100,000 cPs at 25 ° C., and at least two aliphatic unsaturated hydrocarbon groups in one molecule.
  • the first organopolysiloxane exhibits a putty phase at room temperature
  • the second organopolysiloxane exhibits a pasty phase in solution state at high viscosity at room temperature
  • the first and second organopolysiloxanes may have a degree of polymerization of 2,000 or more. have.
  • the first and second organopolysiloxanes may have a molecular chain terminal blocked with a vinyl silyl group.
  • the molecular chain may have a plurality of terminal vinyl groups, and the vinyl group may be included in the molecular chain. Can be.
  • the aliphatic unsaturated hydrocarbon may include a plurality of terminal vinyl groups, or may include a vinyl group in the molecular chain.
  • the molecular chain of the organopolysiloxane may be an alkyl group, a phenyl group, or a tolyl group, more specifically, may be a methyl group, an ethyl group, or a phenyl group.
  • the third organopolysiloxane is a liquid having a lower viscosity at 25 ° C. compared to the first and second organopolysiloxanes, and like the first and second organopolysiloxanes, the molecular chain ends may be sealed with vinyl silyl groups.
  • the molecular chain may have a plurality of terminal vinyl groups, and the vinyl group may be included in the molecular chain.
  • the aliphatic unsaturated hydrocarbon may include a plurality of terminal vinyl groups, or may include a vinyl group in the molecular chain.
  • the molecular chain of the organopolysiloxane may be an alkyl group, a phenyl group, or a tolyl group, more specifically, may be a methyl group, an ethyl group, or a phenyl group.
  • the mixture has a content ratio (weight ratio) of the first organopolysiloxane and the second organopolysiloxane of 0.1: 10 to 10: 0.1, or the first organopolysiloxane.
  • a content ratio of the content of the second organopolysiloxane to the content of the third organopolysiloxane may be 0.1: 10 to 10:10.
  • the fumed silica (distilled silica) constituting the dental impression material composition according to the present invention unlike the conventional silica is produced by firing and then pulverized, the existing silica after heating it under a high temperature, vacuum, and then on a cold surface It is prepared by the method of vapor deposition.
  • the high purity fumed silica produced by the dry method is characterized by small particle size and large surface area.
  • Silica particles themselves have hydrophilic groups and are separated into hydrophilic silicas, but various hydrophobic and reactive silica particles are produced through surface treatment.
  • the fumed silica is agglomerated by silanol groups present on the surface of the silica particles when mixed with the polymer, and even when there is no interaction between the polymer and the silica, phase separation may occur.
  • Typical inorganic silicas are hydrophilic because they are silanol (Si-OH) on the surface. Therefore, in the case where the organic polymer has a hydrophilic group (hydroxyl group (-OH), carboxyl group (-COOH), amino group (-NH 2 ), etc.), the bonding strength between the two materials is improved through silanol and hydrogen bonding of silica.
  • Many organic polymers, which are commercially available, have hydrophobicity, and thus have a disadvantage in that they have less interaction with silica. In order to compensate for these disadvantages, the surface of the silica may be chemically and physically modified to improve the bonding strength between the organic monomer and the silica, thereby producing a uniform organic-inorganic hybrid material.
  • Chemically and physically modifying the surface of the silica means that the surface of the silica is modified by the strong interaction of the silica with the surface modifier.
  • a representative one is a silane coupling agent, and generally has a molecular structure of R-SiA 3 .
  • silane coupling agent A is C 1 -C 5 alkoxy or halogen
  • R is epoxy, styryl, methacryloxy, acryloxy or amino
  • A becomes a silanol (-OH) group through hydrolysis, and the surface is modified through condensation with another silanol (-OH) group on the silica surface. That is, the silane coupling agent serves to impart functional groups capable of polymerization with the organic polymer through hydrolysis upon condensation with moisture and condensation reaction on the surface of silica (see reaction process below).
  • the surface modification method may be used in the traditional blending method and in situ method.
  • a method of mixing a surface modifier and silica with an organic polymer or monomer at the same time is commonly used. This is called in situ reforming.
  • Another method is to surface-modify silica using a silane coupling agent and then mix an organic polymer or monomer. While the former is economical and convenient, it is difficult to obtain a uniform organic-inorganic hybrid material of a desired degree.
  • the latter typical spray method is a method in which a silane coupling agent is added to alcohol and sprayed on silica, dried at room temperature, and then solidified at a high temperature. Therefore, the silane coupling agent is hydrolyzed at room temperature, and then the surface is modified by condensation reaction with silanol groups of silica at high temperature.
  • These surface modified silicas are known to have increased dispersibility to the rubber matrix and to have excellent binding to hydrophobic organic polymers.
  • the main purpose of the surface modification of the silica is to improve the binding force of the silica to the organic polymer in the process of preparing the organic-inorganic hybrid composite.
  • a silane coupling agent can be divided into an alkoxy system and a chlorine system.
  • alkoxy coupling agents especially ethoxy silanes, which are less harmful to the human body, are the mainstream in the industry.
  • the chlorine-based coupling agent has good reactivity, but it is difficult to control the hydrolysis process as well as to cause corrosion and environmental pollution of HCl as a by-product.
  • a silane coupling agent is used to prevent the agglomeration of silica and to increase the interaction with the long organic chain of the polymer to improve the bond between the organic polymer and the silica.
  • the fumed silica forms three-dimensional structural bonds, and when shear force is applied, the mutual bonding of the silica molecules is easily broken, and the fumed silica has a thixotropy property that changes to a liquid sol-like form.
  • the impression material composition may further comprise a QM resin (quadri-functional polysiloxane) to improve the mechanical properties, the QM resin has a viscosity of 6,000 cPs to 10,000 cPs, the vinyl group content of 0.20 mmol / g to 0.21 mmol / g.
  • the QM resin is advantageous in controlling the physical properties of the impression material because the width of the viscosity change of the impression material is not large compared to the organopolysiloxane.
  • the impression material composition may further include an amorphous synthetic filler as a dry reinforcing filler.
  • the amorphous synthetic filler may be selected from the group consisting of at least fumed silica, silica gel, precipitated silica, silica sol, and silicon acid.
  • Dental impression material composition since the synthetic filler is an organic-inorganic hybrid composite containing 30% to 60% by weight based on the total weight of the polyvinylsiloxane may be mixed in a masterbatch form, synthetic filler Can be uniformly dispersed in the polyvinylsiloxane, and thus, a dental impression material composition having excellent high strength properties such as high elongation and high tear can be made.
  • fillers are generally used for strength increase and viscosity adjustment, and fumed silica is also added for the purpose of being used as a thickener.
  • the amorphous synthetic silica is a very light powder of white color, amorphous silicon dioxide.
  • the surface is modified with hexamethyldisilazane (hexamethyldisilazane), and the basic particles are very small, spherical, large surface area, characteristic surface characteristics, and high purity silicon compound with average particle size of 7 nm to 100 nm, small particles Due to the large surface area and the value may be 50 m 2 / g to 300 m 2 / g fumed silica, the fumed silica is in the form of a dispersion dispersed in polyvinylsiloxane, based on the total weight of the impression material 10 wt% to 40 wt% may be included.
  • the impression material composition is an impression material that can have a suitable point viscosity according to the purpose, such as for abutment injection or a tray, in one specific example, the impression material composition may have a consistency of 30 mm to 45 mm.
  • the viscosity of the impression material composition exceeds 45 mm viscosity is low mechanical strength of the impression material may be weak, the impression material may be torn when removing the impression material.
  • the viscosity is less than 30 mm viscosity is too high it may be difficult for the impression material to penetrate to the minute portion of the depression.
  • the dental impression material composition of the present invention has a tear strength of 10 N / mm to 18 N / mm and a tensile strength of 1 N / mm 2 to 6 in order to minimize discomfort of the patient when removing the impression after the impression is made.
  • the filler is included to improve workability before curing or mechanical properties after curing of the dental silicone impression material composition.
  • the filler may be an inorganic filler, or an organic filler, or a mixture of inorganic fillers and organic fillers.
  • the inorganic filler can be, for example, cristobalite, crystalline natural silica, barium aluminum silicate, kaolin, talc, strontium aluminum silicate, glass, barium silicate Glass, strontium silicate glass, borate aluminum silicate glass, phosphate aluminum silicate glass, fluorine aluminosilicate glass, glass beads, calcium silicate, Zeolites including zirconium silicate, sodium aluminum silicate, silicate layer, ceramic microspheres, aluminum trihydrate (ATH), and calcium carbonate, bentonite, molecular sieve ), Alkali metals, alkaline earth metal oxides, hydroxides, Wave tight (apatide), it may be one or more selected from the group consisting of a charged polymer chip, spherical fillers, acid-reactive filler, and nano-zirconia filler.
  • the filler may be included in an amount of 40% to 80% by weight based on the total weight of the impression material composition, in order to have a suitable viscosity and excellent mechanical strength required by the present application, more preferably, 40 based on the total weight of the impression material composition It may be included in the wt% to 70% by weight.
  • the fluidity of the softener before curing can be too large, it is difficult to exhibit sufficient physical properties of the impression material required in the present invention.
  • the filler exceeds 80% by weight, the viscosity of the softener before curing may be too high, making it difficult to perform the softening operation.
  • the surfactant is a nonionic surfactant, sodium lauryl sulfate, monoglyceride sulfate, sodium lauryl sarcosinate, sucrose fatty acid ester, laurin It comprises at least one selected from the group consisting of acid diethanolamide (lauric acid diethanolamide), cured castor oil, polyoxyethylene, trisiloxane ethoxylate, fluorine-based surfactant,
  • the surface tension may be 10 N / m to 30 N / m.
  • the curing agent may act as a catalyst for crosslinking polymerization, and may be, for example, a platinum catalyst such as a chloroplatinic acid, an alcohol-modified chloroplatinic acid, a complex of chloroplatinic acid and an olefin, and more preferably, the platinum-divinyltetra. It may be a methyl disiloxane complex (platinum-divinyltetramethyldisiloxane complex).
  • the curing agent may be in a form in which the platinum-divinyltetramethyldisiloxane complex is dispersed in polydimethylsiloxane at 0.05 wt% to 5 wt% based on the total weight of the dispersion.
  • the curing agent may be included in an amount of 0.05% to 10% by weight based on the total weight of the impression material composition.
  • the curing speed may be slow, and the curing may be further slowed when a small amount of a substance that inhibits the catalytic ability of the platinum catalyst is present.
  • the curing agent exceeds 5% by weight, not only the curing rate is too fast, but also the manufacturing cost may increase.
  • the curing retardant is used to ensure sufficient working time, preferably 1,3,5,7-tetra having a viscosity of 4 to 500 cPs and a vinyl group content of 1.5 mmole / g to 15 mmole / g Vinyl tetramethylcyclotetrasiloxane (1,3,5,7-tetravinyltetramethylcyclotetrasilonxane), and the curing retardant may be included in an amount of 0.01 wt% to 10 wt% based on the total weight of the impression material composition.
  • the crosslinking agent may be an organopolysiloxane including a hydrogen group at the molecular chain terminal, and in detail, the organopolysiloxane including the hydrogen group is substituted with a C 1 -C 3 alkyl group at one molecular terminal.
  • Organo hydrogen polysiloxane containing silicon, and the organohydrogenpolysiloxane may be included in the base paste.
  • the organohydrogenpolysiloxane may serve as a crosslinking agent of a mixture of organopolysiloxanes containing the vinyl group, and silicon substituted with the C 1 -C 3 alkyl group may be present at the molecular chain terminal or side chain, preferably a molecule It may be present at both ends of the chain, the crosslinking agent may be included in 1% by weight to 10% by weight based on the total weight of the impression material composition.
  • the organohydrogenpolysiloxane is polymethylhydrosiloxane, or methylhydro-dimethylsilonic acid having a viscosity of 2 cPs to 10,000 cPs, and a Si-H content of the end group of 0.01 mmol / g to 5.5 mmol / g, or It may be a copolymer of polymethylhydrosiloxane and methylhydro-dimethylsilonic acid (methyl hydro methyl siloxane copolymer), or a mixture of polymethylhydrosiloxane and methylhydro-dimethylsilonic acid, wherein the organohydrogenpolysiloxane includes a vinyl group
  • the organopolysiloxane can be used as a crosslinking agent in the addition reaction using a curing agent.
  • the dental impression material composition may be an addition polymerization type two-component paste in which a base paste and a catalyst paste are mixed, and the content ratio (weight ratio) of the base paste and the catalyst paste is 0.1. : 1 to 1: 0.1 may be.
  • plasticizers, pigments, flavoring agents, viscosity modifiers, etc. may be further added to the dental impression material composition in order to meet the physical properties desired by the manufacturer.
  • 1 is an electron micrograph of fumed silica dispersed in a polyvinylsiloxane polymer
  • FIG. 2 is an electron micrograph of the organic-inorganic hybrid composite including the polyvinylsiloxane in which the fumed silica of FIG. 1 is dispersed.
  • a QM resin of Formula 1 was prepared having a viscosity of 10,000 cPs and a vinyl group content of 0.20 mmol / g.
  • Polydimethylsiloxane of the following Chemical Formula 2 was prepared in which the total vinyl group content was 0.02 to 0.04 mmol / g, 0.06 to 0.11 mmol / g, and 0.14 to 0.4 mmol / g, and both ends of the molecule were substituted with vinyl groups.
  • n is from 1 to 50.
  • the surface of the nano-sized fumed silica (filler) was silane-treated with trimethylsilanol, followed by graft polymerization with polydimethylsilonic acid substituted at a terminal with a vinyl group.
  • An organic-inorganic hybrid composite was prepared having a weight ratio of 30 wt% based on the total weight of the inorganic hybrid composite, a vinyl group content of 0.11 mmol / g to 0.40 mmol / g, and a viscosity of 100 cps.
  • the composition of the base paste and the catalyst paste including the QM resin, vinyl group-substituted polydimethylsiloxane, and organic-inorganic hybrid composites prepared in Preparation Examples 1, 2, and 3, respectively, is shown in Table 2 below.
  • the base paste and the catalyst paste were mixed at 20 ° C. using a mixer to prepare a dental impression material composition.
  • the mixing order was mixed in the order of organic-inorganic hybrid type composite, QM resin, polydimethylsiloxane substituted with vinyl group, filler, crosslinking agent, curing agent, pigment, curing retardant, and surfactant.
  • the polydimethylsiloxane substituted with a vinyl group is a polymer having a viscosity of 100 cPs, a polymer having a vinyl group content of 0.40 mmol / g, a polymer having a viscosity of 1,000 cPs, a polymer having a vinyl group content of 0.11 mmol / g, a polymer having a viscosity of 65,000 cPs, and a vinyl group content of 0.03 mmol / g. It was appropriately selected from the center and used for each composition ratio described below.
  • Crosslinking agent a methylhydro-dimethylsilonic acid copolymer (Crosslinker 210) having a viscosity of 40 mPas represented by Formula 3 and a 4.2 mmol / g Si-H content was used.
  • n 1-50.
  • a platinum-divinyltetramethyldisiloxane complex in which 0.5% by weight of the platinum-divinyltetramethyldisiloxane complex was dispersed in polydimethylsiloxane (Evonik Industries: Catalyst 510) was used.
  • 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane (1,3,5,7-tetravinyltetramethylcyclotetrasilonxae) was used.
  • the other compositions Using 6% by weight of the organic-inorganic hybrid composite and 8% by weight of the QM resin (10,000 cPs), the other compositions have a composition ratio as shown in Table 4 to the impression material composition in the same manner as in Example 1 Was prepared.
  • Impression material composition was prepared in the same manner as in Example 1 to have the same composition ratio.
  • Synthetic polydimethylsiloxane (100 cps) was added 11% by weight without using the organic-inorganic hybrid composite used in Example 1, the other compositions were the same as in Example 1 to have a composition ratio as shown in Table 7 below. Impression material composition was prepared.
  • each paste was filled in a dual type syringe, and the dual type After the tip is attached to the syringe, the gun is mounted on the gun, and the trigger of the gun is pulled so that the base paste and the catalyst paste are mixed and injected at the tip in a 1: 1 ratio, and the mixed paste is cured for a predetermined time.
  • the impression material sample was completed. The following tests were performed to measure the mechanical properties of the impression material samples, and the results are shown in Table 8 below.
  • the impression material composition was placed in a separable metal mold having an internal diameter (12.5 ⁇ 0.05) mm and a height (20 ⁇ 0.2) mm, and the time until appropriate curing at (35 ⁇ 1) ° C. was measured.
  • the scale (H 2 ) was read after 30 seconds after application within 30 seconds in total.
  • the curing time was calculated by substituting the measured values into the following equation.
  • (H 1- H 2 ) is the scale on the last gauge, D is 20 mm as the height of the specimen, and the time when the results of P repeated three times all over 99% was set as the curing time .
  • the measurement of the viscosity of the store was made by raising 0.5 ml of the mixed impression material on the polyethylene film on the glass plate, and then covering the film with another glass plate. After applying a load of 14.7 N for 5 seconds, it was cured at room temperature for 15 minutes, and the average was calculated by measuring the diameters of the long and short axes. Three measurements were made for each group, and the results were calculated.
  • the recovery rate test was performed according to the rubber impression standard ISO 4823: 2000 (Dentistry-Elastomeric impression materials). Specimens were fabricated in the same manner as the compressive strain test and placed on an instrument to measure strain recovery. The instrument was operated to deform the specimen to 6 mm, allowed to relax for 110 seconds after the load was removed, and the scale was recorded. Five specimens were produced for each group and tested.
  • Tear strength indicates the energy required to tear a certain length and was measured according to ASTM D1938 (Standard Test Method for Tear-Propagation Resistance (Trouser Tear) of Plastic Film and Thin Sheeting by a Single-Tear Method).
  • the difference between the distance between the marks just before breaking and the distance of the reference marks is expressed as a percentage of the reference marks distance. and the difference between the gauge length (L 0) before the test indicated a value divided by the gauge length (L 0) before the test as a percentage.
  • Modulus is the ratio of strain to stress, which is the slope in the straight line of the stress-strain curve, and was measured as the strain-stress slope value at the initial 5% when the tear strength was evaluated.
  • the dental impression material composition according to the present invention is a low viscosity resin when the content of the organic-inorganic hybrid composite polymerized with organopolysiloxane containing fumed silica and vinyl group and high viscosity resin is high. Compared to the case where the content of the high, there is no problem of fluidity decrease due to the increase of the viscosity and can prevent the aggregation of the filler, it can be confirmed that the dental impression material composition can be improved mechanical properties.
  • the dental silicone impression material composition according to the present invention is an organic-inorganic hybrid composite (composite) formed by graft polymerization of nano-sized fumed silica and polydimethylsiloxane (PDMS) having vinyl functional groups at its ends. ), It is possible to produce an impression material having excellent mechanical strength by high tear strength and tensile strength.
  • PDMS polydimethylsiloxane

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
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Abstract

La présente invention concerne une composition de matériau d'empreinte dentaire et fournit une composition de matériau d'empreinte dentaire à haute résistance, la composition comprenant un organopolysiloxane, un composite hybride organique-inorganique, une charge, un agent de durcissement, un retardateur de durcissement, un agent de réticulation et un tensioactif, le composite organique-inorganique hybride ayant une structure dans laquelle un organopolysiloxane comprenant un groupe vinyle est polymérisé par greffage sur de la fumée de silice de taille nanométrique dispersé dans du polyvinylsiloxane, et le composite hybride organique-inorganique est contenu en une quantité de 5 % en poids à 50 % en poids sur la base du poids total de la composition de matériau d'empreinte et par conséquent, la composition résout le phénomène d'agglomération d'une charge et résout le problème de la dégradation de la fluidité due à l'augmentation de la viscosité.
PCT/KR2014/003762 2014-04-29 2014-04-29 Composition de matériau d'empreinte dentaire ayant des propriétés mécaniques améliorées WO2015167038A1 (fr)

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WO2023106519A1 (fr) * 2021-12-08 2023-06-15 오스템임플란트 주식회사 Composition de matériau d'empreinte dentaire présentant une excellente propriété de régulation des bulles

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