JP2017114783A - Impression material - Google Patents

Abstract

An impression material including an alginate-based substrate and a curing material, which enables good operability as well as good impression accuracy.
An impression material comprising an alginate-based substrate and a curing material, wherein the curing material comprises a poorly water-soluble liquid compound and a polyether of a poorly water-soluble liquid compound / 50/50 to 98/2. Impression material, including the polyether mass ratio.
[Selection figure] None

Description

  The present disclosure relates to impression materials, and more particularly to dental impression materials.

  Conventionally, as a dental impression material, an alginate-based impression material that is a hydrocolloid impression material has been widely used. The alginate-based impression material is usually prepared by kneading a base paste containing an alginate and a curing material paste containing a curing agent with an automixer. The impression material is required to adjust the consistency and the time required for taking an impression (that is, the curing time) to an appropriate range.

  Patent Document 1 is composed of a main material paste mainly composed of 1 to 20% by weight of alginate and water, a liquid component that does not react with calcium sulfate, and a hardener paste mainly composed of 10 to 60% by weight of calcium sulfate. Paste-like alginate impression material, the main material paste contains substantially no powdery filler, 0.01-5% by weight of sodium or potassium carbonate as a retarder, color ginnan, pullulan, guard run , Xanthan gum, gellan gum, pectin, konjac glucomannan, xyloglucan, guar gum, gum arabic, locust bean gum and 0.01-15% by weight of a polysaccharide, As a retarder, 0.01 to 10% by weight of sodium or potassium phosphate, 0.5 to polybutene A paste-like dental alginate impression material composition characterized by containing 30% by weight is described.

  Patent Document 2 discloses calcium sulfate, a water-soluble solvent having an oil-water partition coefficient of -1.00 to -0.01 measured in accordance with the method described in JIS Z 7260-107: 2000, and nonionic surface activity. A dental alginate impression material curing agent paste comprising at least an agent and a thickener is described.

JP 2006-273720 A JP 2014-205653 A

  An object of the present invention is to provide an impression material including an alginate-based substrate and a curing material, which enables good operability as well as good impression accuracy.

  One aspect of the present disclosure is an impression material that includes an alginate-based substrate and a curing material, and the curing material contains a hardly water-soluble liquid compound and a polyether at a difficulty of about 50/50 to about 98/2. An impression material comprising a water-soluble liquid compound / polyether mass ratio is provided.

  One embodiment of the present invention can provide an impression material including an alginate-based substrate and a curing material, which enables good operability as well as good impression accuracy.

  One embodiment of the present disclosure is an impression material including an alginate-based substrate (hereinafter, also simply referred to as a substrate) and a curing material, and the curing material includes a poorly water-soluble liquid compound and a polyether. An impression material comprising a poorly water-soluble liquid compound / polyether mass ratio of about 50/50 to about 98/2.

<Alginate base material>
As the alginate-based substrate included in the impression material of the present disclosure, substrates having various compositions including alginate can be used. In a typical embodiment, the alginate-based substrate is pasty. In a typical embodiment, the alginate-based substrate includes an alginate, water, a curing retarder, and a filler, and further includes at least one selected from a surfactant, a preservative, a fragrance, and the like as optional components. Including.

  Alginate functions as a gelling agent. Examples of the alginate include sodium alginate, potassium alginate, ammonium alginate, triethanolamine alginate and the like, and may be one kind or a combination of two or more kinds. Sodium alginate and potassium alginate are preferable from the viewpoint of easy acquisition and handling and good physical properties to the impression material, and it is more preferable to use both sodium alginate and potassium alginate.

  In a preferred embodiment, the amount of alginate in 100% by weight of the alginate-based substrate is from about 1 to about 10% by weight. The amount is preferably about 2% by mass or more, or about 3% by mass or more, preferably about 8% by mass or less, or about 7% by mass or less, from the viewpoint of giving good physical properties to the impression material. .

  The water may be purified water, deionized water or the like. In a preferred embodiment, the amount of water in 100% by weight of the alginate-based substrate is from about 50 to about 90% by weight. The amount is preferably about 55% by mass from the viewpoint of preventing the viscosity of the base material from becoming too high and facilitating the kneading of the base material and the curing material and the application of the impression material (ie impression collection). Above, or about 60% by mass or more, avoiding the viscosity of the base material being too low, making it easy to knead the base material with the curing material and apply the impression material, and further improve the physical properties of the impression material In view of the above, it is preferably about 85% by mass or less, or about 80% by mass or less.

  As the curing retarder, filler, and surfactant in the substrate, the same materials as those exemplified below for the curing material can be used.

  In a preferred embodiment, the amount of cure retarder in 100% by weight alginate-based substrate is from about 0.10 to about 5.0% by weight. The amount is preferably about 0.20% by mass or more, or about 0.30% by mass or more, from the viewpoint of favorably securing the operation time at the time of impression collection by avoiding the curing of the impression material too fast. From the viewpoint of good curing of the impression material, it is preferably about 4.5% by mass or less, or about 4.0% by mass or less.

  In a preferred embodiment, the amount of filler in 100% by weight of the alginate-based substrate is from about 10 to about 40% by weight. The amount is preferably about 12% by mass or more, or about 15% by mass or more from the viewpoint of improving the physical properties of the impression material, and from the viewpoint of ensuring a satisfactory content of other components of the base material. Preferably, it is about 38 mass% or less, or about 35 mass% or less.

  In a preferred embodiment, the amount of surfactant in 100% by weight of the alginate-based substrate is from about 0.10 to about 5.0% by weight. The amount is preferably about 0.15% by mass or more, or about 0.20% by mass from the viewpoint of obtaining good storage stability by avoiding separation of the hydrophobic component and the hydrophilic component in the substrate. From the viewpoint of ensuring a satisfactory content of other components of the base material, it is preferably about 4.5% by mass or less, or about 4.0% by mass or less.

  Examples of the preservative include methyl paraoxybenzoate, propyl paraoxybenzoate, and the like. In a preferred embodiment, the amount of preservative in 100% by weight of the alginate-based substrate is from about 0.01 to about 1.0% by weight.

  Examples of the fragrances include peppermint flavor and apple flavor. In a preferred embodiment, the amount of perfume in 100% by weight of the alginate-based substrate is from about 0.01 to about 1.0% by weight.

<Curing material>
In the impression material of the present disclosure, the curing material includes both a poorly water-soluble liquid compound and a polyether. Accordingly, the hardener of the present disclosure is typically a paste. The poorly water-soluble liquid compound can function as a hydrophobic solvent, and the polyether can function as a hydrophilic solvent. If the viscosity of the hardener is too low, it is difficult to knead the base material with the hardener. Use a poorly water-soluble liquid compound and polyether together (that is, they coexist in the hardener). Thus, when the base material and the curing material are kneaded, good operability can be achieved so that the impression material does not sag from the kneading device (by imparting an appropriate viscosity to the curing material). At the same time, good impression accuracy of the impression material (by the low surface roughness of the impression material) can be achieved. In a typical embodiment, the curing material includes a poorly water-soluble liquid compound, a polyether, a gelling agent, a surface modifier, and a curing retarder, and optionally includes a surfactant, a colorant, and a filler. 1 type or more chosen from etc. is included.

  In the present disclosure, the “slightly water-soluble liquid compound” means a compound that has a solubility in 100 g of water at 20 ° C. of 5 g or less and is liquid at room temperature (generally 20 ° C.). Examples of the hardly water-soluble liquid compound include hydrocarbons, alcohols, phenols, fatty acids or esters thereof, hydrophobic polymers, and the like.

  As hydrocarbons, aliphatic chain hydrocarbons such as hexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, kerosene, 2,7-dimethyloctane, 1-octene; and cycloheptane, And alicyclic hydrocarbons such as cyclononane. The hydrocarbon can be a hydrocarbon mixture such as liquid paraffin.

  Examples of the alcohol include saturated aliphatic alcohols such as 1-hexanol and 1-octanol; unsaturated aliphatic alcohols such as citronellol and oleyl alcohol; and aromatic alcohols such as benzyl alcohol. Examples of phenols include cresol.

  Examples of fatty acids or esters thereof include saturated fatty acids such as hexanoic acid and octanoic acid; unsaturated fatty acids such as oleic acid and linoleic acid; and fatty acid esters such as ethyl octoate, dibutyl phthalate, and oleic acid glyceride.

  Examples of the hydrophobic polymer include polysiloxane.

  Among these, liquid paraffin is preferable from the viewpoints of good hydrophobicity, easy availability and handling, safety to living bodies, and the like.

  In a preferred embodiment, the amount of the poorly water-soluble liquid compound in 100% by mass of the curing material is about 10% by mass to about 50% by mass. The amount is preferably about 13% by mass or more, about 15% by mass or more, about 18% from the viewpoint of obtaining a good effect of increasing the viscosity of the curing material and facilitating the kneading of the base material and the curing material. % Of mass% or more, about 20 mass% or more, about 23 mass% or more, about 26 mass% or more, or about 30 mass% or more in view of obtaining good storage stability of the cured material, and other components of the cured material From the standpoint of ensuring a satisfactory content ratio, it is preferably about 47% by mass or less, about 43% by mass or less, or about 40% by mass or less, or about 37% by mass or less.

  Examples of the polyether include linear or branched polyether, and polyalkylene glycol is preferable. Examples of the polyalkylene glycol include polyethylene glycol and polypropylene glycol, and among them, polyethylene glycol is preferable in terms of excellent hydrophilicity.

  In a preferred embodiment, the molecular weight of the polyether is from about 200 to about 800. The molecular weight is preferably about 250 or more, or about 350 or more from the viewpoint of securing good affinity between the polyether in the cured material and other components and obtaining good impression accuracy. From the viewpoint of achieving accuracy, it is preferably about 700 or less, or about 600 or less. The said molecular weight intends the weight average molecular weight measured by gel permeation chromatography (GPC method).

  In a preferred embodiment, the amount of polyether in 100% by weight of the curing material is about 0.10 to about 30% by weight. The amount is preferably about 0.50% by mass or more, or about 1% by mass or more from the viewpoint of obtaining good impression accuracy, and from the viewpoint of ensuring a satisfactory content of other components of the curing material, Preferably, it is about 20 mass% or less, about 19 mass% or less, about 15 mass% or less, or about 8 mass% or less.

  In the cured material, the hardly water-soluble liquid compound / polyether mass ratio is about 50/50 to about 98/2. The mass ratio is about 50/50 or more, preferably about 72/28 or more, or about 89 from the viewpoint of facilitating kneading between the base material and the curing material by sufficiently increasing the viscosity of the curing material. / 11 or more. The mass ratio is about 98/2 or less, preferably about 97.5 / 2.5 or less, or about 97/3 or less from the viewpoint of obtaining good impression accuracy.

  As the gelling agent, generally a divalent or higher valent metal compound can be used. Specific examples include calcium sulfate (for example, calcium sulfate hemihydrate, calcium sulfate anhydrous, calcium sulfate dihydrate), magnesium sulfate, and the like. Among these, calcium sulfate hemihydrate is preferable in terms of obtaining good curability.

  In a preferred embodiment, the amount of gelling agent in 100% by weight of the curing material is about 20 to about 70% by weight. The amount is preferably about 30% by mass or more, or about 40% by mass or more, or about 45% by mass or more from the viewpoint of obtaining good curability, and preferably from the viewpoint of obtaining good physical properties of the impression material. Is about 60% by weight or less, about 55% by weight or less, or about 50% by weight or less.

  The surface modifier has the effect of making the surface of the impression material smoother and improving the impression accuracy. Examples of the surface modifier include inorganic fluoride compounds such as potassium potassium fluoride and potassium silicofluoride, and metal oxides such as magnesium oxide and zinc oxide. Among these, potassium titanium fluoride is preferable from the viewpoint of improving impression accuracy. In a preferred embodiment, the amount of the surface modifier in 100% by mass of the curing material is about 0.5 to about 30% by mass, or about 1 to about 27% by mass, about 5 to about 5% from the viewpoint of obtaining good impression accuracy. About 24 wt%, or about 9 to about 18 wt%.

  Curing retarders include alkali metal phosphates (eg, trisodium phosphate, tripotassium phosphate, sodium pyrophosphate, sodium tripolyphosphate, etc.), alkali metal oxalates (eg, sodium oxalate, potassium oxalate, etc.) And alkali metal carbonates (for example, sodium carbonate, potassium carbonate, etc.). Among these, sodium pyrophosphate decahydrate is preferable from the viewpoint of easy handling.

  In a preferred embodiment, the amount of cure retardant in 100% by weight of the curing material is from about 0.1 to about 10% by weight. The amount is preferably about 0.5% by mass or more, or about 0.8% by mass or more, from the viewpoint of avoiding the curing of the impression material too fast and ensuring a good operation time during impression collection. From the viewpoint of good curing of the impression material, it is preferably about 8% by mass or less, or about 5% by mass or less.

  Surfactants include anionic surfactants (eg alkyl sulfonates, alkyl benzene sulfonates, alkyl ether carboxylates, etc.), cationic surfactants (eg alkyl amine salts, quaternary ammonium salts, etc.), amphoteric Surfactants (such as aminocarboxylates), and nonionic surfactants (such as polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene-polyoxypropylene block polymers, polyoxyethylene glycerin fatty acid esters, Polyoxyglycerin fatty acid ester, sorbitan fatty acid ester, sucrose ester, polyoxydiethylene alkylamine, block polymer of polysiloxanes and polyoxyethylenes, etc.).

  In a preferred embodiment, the amount of surfactant in 100% by weight of the curing material is from about 0.1 to about 10% by weight. The amount is preferably about 0.5% by mass or more, or about 0.8% by mass from the viewpoint of obtaining good storage stability by avoiding separation of the hydrophobic component and the hydrophilic component in the cured material. From the viewpoint of ensuring a satisfactory content of other components of the curing material, it is preferably about 8% by mass or less, or about 5% by mass or less.

  Examples of the colorant include Red No. 226. In a preferred embodiment, the amount of colorant in 100% by weight of the curing material is from about 0.01 to about 1.0% by weight.

  Examples of the filler include diatomaceous earth, silica, alumina and the like. In a preferred embodiment, the amount of filler in 100% by weight of the hardener is from about 1 to about 40% by weight. The amount is preferably about 2% by mass or more, or about 5% by mass or more from the viewpoint of increasing the viscosity of the curing material and improving the physical properties of the impression material, and contains other components of the curing material. From the viewpoint of ensuring a good rate, it is preferably about 20% by mass or less, or about 8% by mass or less.

  In a particularly preferred embodiment, the curing material comprises a hardly water-soluble liquid compound: about 18 to about 37% by weight, polyether: about 1 to about 19% by weight, gelling agent: about 40 to about 55% by weight, and surface modification Agent: about 9 to about 18% by weight.

  In a preferred embodiment, the cured material has a viscosity of about 300,000 to about 5,000,000 mPa · s as measured with a JISZ 8803 single cylinder rotational viscometer. The viscosity is preferably about 300,000 mPa · s or more from the viewpoint of improving the operability of the impression material so that the impression material does not sag from the kneading device when the base material and the curing material are kneaded. Or about 500,000 mPa · s or more, or about 600,000 mPa · s or more, and in one embodiment, about 5,000,000 mPa · s or less, or about 3,000,000 mPa · s or less, or about 2 , 000,000 mPa · s or less.

<Manufacture of base material, curing material and impression material>
A base material and a hardening | curing material can each be manufactured by the method of mixing a compounding component with a well-known stirring mixer, for example. As a stirring mixer, a ball mill, a ribbon mixer, a kneader, an internal mixer, a screw kneader, a Henschel mixer, a universal mixer, a Ladige mixer, a butterfly mixer, and the like can be used. The impression material of the present disclosure can be provided as a combination of a base material manufactured as described above and a curing material. In a typical embodiment, the base material and the curing material are each provided in a state of being enclosed in a package, and these packages are mounted on a known automatic kneader so that the base material and the curing material are in a predetermined ratio. By automatic kneading, an impression material paste is provided.

  Hereinafter, although an example is given and the exemplary mode of the present invention is further explained, the present invention is not limited to these examples.

<Preparation of alginate base material>
2198.1 g of purified water, 2.9 g of methyl paraoxybenzoate, 1.5 g of propyl paraoxybenzoate, 23.8 g of sodium pyrophosphate decahydrate, 0.8 g of peppermint flavor, 12.5 g of polyoxyethylene Sorbitan monolaurate, 68.3 g sodium alginate, 68.4 g potassium alginate, 446.5 g diatomaceous earth, and 178.3 g silicon dioxide are weighed and mixed using a planetary mixer, and the composition shown in Table 1 A ratio alginate base paste (base 1) was prepared.

<Preparation of curing material>
The compounding components shown in Table 2 were weighed and mixed with a planetary mixer to prepare pastes of curing materials 1-13.

<Preparation of impression material>
The base paste and the curing material paste prepared as described above were mixed with a pentamix 3 impression material automatic kneader (manufactured by 3M Japan). The mixing was performed at a mass ratio of 5: 1 between the base paste and the curing material paste.

<Evaluation>
The following evaluation was performed about the hardening material and the impression material. The results are shown in Tables 2 and 3.

1. Curing Material Viscosity The viscosity of the obtained curing material paste was measured using a single cylindrical rotational viscometer (Brookfield Model DVII) in accordance with JISZ 8803.

2. Impression accuracy (surface roughness (Ra))
Using the obtained impression material, an impression was taken in accordance with the method described in “Compatibility with gypsum” of JIS T 6505: 2005 “Dental alginate impression material”, and then the plaster ( Co., Ltd., product name New Pla Stone II) was injected, and the surface roughness (Ra) of the resulting plaster model was measured with a surface roughness measuring machine (Surfcom 1500DX3, manufactured by Tokyo Seimitsu Co., Ltd.).

3. Hardening material drooping The curing material paste and base material paste are set in the Pentamix 3 impression material automatic kneader, kneaded by the automatic kneader and discharged from the nozzle to the impression tray, and the impression material does not drip from the nozzle. Whether it was visually confirmed or not was evaluated according to the following evaluation criteria.
○: No dripping ×: Dripping occurs

4). Liquid / Solid Separation of Curing Material The presence or absence of separation of the liquid component immediately after preparation of the curing material paste was visually confirmed and evaluated based on the following evaluation criteria.
○: No liquid separation from the hardener paste and no aggregation of solids Δ: Some liquid separation from the hardener paste and solids aggregation x: Liquid separation from the hardener paste or solids aggregation

5. Compatibility of impression material and gypsum After using the obtained impression material, an impression was collected in accordance with the method described in “Compatibility with gypsum” of JIS T 6505: 2005 “Dental alginate impression material”. Hard gypsum (product name New Pla Stone II, manufactured by GC Corporation) is injected into the impression surface, and the presence or absence of the impression material is visually confirmed on the obtained plaster model. Based on the following evaluation criteria evaluated.
○: No impression material attached ×: Impression material attached

Details of the blending components are as follows.
Liquid paraffin: “162-00477”, available from Wako Pure Chemical Industries, Ltd. Polyethylene glycol (PEG400): “07B2G8”, available from Daiichi Kogyo Seiyaku Co., Ltd. Polyethylene glycol (PEG300): Toho Chemical Co., Ltd. Tripropylene glycol available from: “TPG-H”, available from Adeka Corporation POE (4) (6) sorbitan monooleate: “TO-106V”, available from Nippon Surfactant Kogyo Co., Ltd .: potassium potassium fluoride: “8126781”, available from Morita Chemical Co., Ltd. Sodium pyrophosphate decahydrate: “192-03035”, available from Wako Pure Chemical Industries, Ltd. Magnesium oxide: “6274650”, available from Ako Kasei Co., Ltd. Zinc oxide: “860903330”, obtained from Yoshida Pharmaceutical Co., Ltd. Noh Red No. 226: Kishi available from Kasei Co., Ltd.

  As shown in Table 3, in each example using the curable material according to the present disclosure, there is no liquid / solid separation of the curable material, the sag of the impression material, the impression accuracy, and the compatibility between the impression material and gypsum are all good Met. On the other hand, Comparative Example 1 using only a poorly water-soluble liquid compound as a solvent for the curing material has poor impression accuracy, Comparative Example 2 using only polyether as the solvent for the curing material, and Comparative Examples 3 and 5 using only tripropylene glycol. In this case, liquid / solid separation occurred, the dampening property of the curing material and the compatibility with gypsum were poor, and the impression accuracy was poor in Comparative Example 4 using a hardly water-soluble liquid compound and tripropylene glycol as the solvent of the curing material.

  The impression material of the present disclosure is suitably used as a dental impression material.

Claims (4)

  An impression material comprising an alginate-based substrate and a curing material, wherein the curing material comprises a hardly water-soluble liquid compound and a polyether, a hardly water-soluble liquid compound / polyether mass ratio of 50/50 to 98/2. Including impression material.   The impression material according to claim 1 whose viscosity of said hardening material measured with a JISZ8803 single cylinder type rotation viscometer is 300,000-5,000,000 mPa * s. The curing material is
Slightly water-soluble liquid compound: 18 to 37% by mass,
Polyether: 1 to 19% by mass,
Gelling agent: 40-55% by mass, and surface modifier: 9-18% by mass,
The impression material according to claim 1, comprising:   The impression material according to claim 3, wherein the surface modifier contains potassium titanium fluoride.