JP7825962B2 - Dental hydraulic temporary sealing material composition with excellent removability after hardening - Google Patents
Dental hydraulic temporary sealing material composition with excellent removability after hardeningInfo
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Description
本発明は歯科用水硬性仮封材組成物に関するものである。 The present invention relates to a dental hydraulic temporary sealing material composition.
歯科臨床において、根管治療が行われる際、感染歯質を除去した後の経過観察期間や、薬剤の適用期間などに、根管内への食物の混入や治療部位の細菌感染の防止、根管に填入した薬剤の封鎖などを目的として、歯科用水硬性仮封材を窩洞や根管に暫間的に充填する仮封が行われている。 In clinical dentistry, when root canal treatment is performed, temporary sealing is performed by temporarily filling the cavity or root canal with dental hydraulic temporary sealing material during the follow-up period after the removal of infected tooth tissue or during the application of medication, in order to prevent food from entering the root canal or bacterial infection of the treatment area, and to seal off medication that has been placed in the root canal.
歯科用水硬性仮封材は石こう粉末を主成分とするパテ状のペーストであり、窩洞に充填後、口腔内の唾液などの水分と反応して硬化する。仮封期間終了後は、硬化した歯科用水硬性仮封材組成物を破壊して除去する。このような歯科用水硬性仮封材組成物としては、特許文献１、又は２に例示されるものが知られている。 A dental hydraulic temporary sealing material is a putty-like paste whose main component is gypsum powder. After filling a cavity, it hardens by reacting with moisture such as saliva in the oral cavity. After the temporary sealing period ends, the hardened dental hydraulic temporary sealing material composition is destroyed and removed. Examples of such dental hydraulic temporary sealing material compositions are known, such as those exemplified in Patent Documents 1 and 2.
従来の歯科用水硬性仮封材は高い硬化性を付与すると、硬化が過度に進行し、硬化体の強度が高くなりすぎてしまうため、仮封期間終了後に除去が困難になるという問題点があった。この問題に対し、硬化性成分である石こう粉末の配合量を少なくすることで、硬化性を低下させ、硬化後の除去性を改善することは可能であるものの、この方法では硬化が緩慢になり、処置後早期に機能させることができなくなってしまう。加えて、口腔内での耐久性が低下するために封鎖性にも悪影響を与えてしまう。このように、従来の歯科用水硬性仮封材は高い硬化性を有しつつ、優れた硬化後の除去性を発現させることが困難であった。 When conventional dental hydraulic temporary sealing materials are given high curing properties, they harden excessively, resulting in an excessively high strength of the cured body, making them difficult to remove after the temporary sealing period. To address this issue, it is possible to reduce the curing property and improve removability after curing by reducing the amount of gypsum powder, which is the curing component. However, this method slows down the curing and makes it impossible to function immediately after treatment. In addition, durability within the oral cavity is reduced, which adversely affects sealing properties. Thus, it has been difficult for conventional dental hydraulic temporary sealing materials to achieve high curing properties while also exhibiting excellent removability after curing.
本発明は上記事情に鑑みてなされたものであり、高い硬化性を有しつつ、硬化後の除去性に優れる歯科用水硬性仮封材組成物を提供することを課題とする。 The present invention was made in consideration of the above circumstances, and its objective is to provide a dental hydraulic temporary sealing material composition that has high curing properties and excellent removability after curing.
上記課題の解決は以下の本発明によって達成される。即ち、本発明の歯科用水硬性仮封材組成物は比表面積が１．５ｍ２／ｇ以上、及び／又は、細孔容積が０．０１５ｃｃ／ｇ以上である石こう粉末を含むことを特徴とする。 The above-mentioned problems are solved by the present invention as follows. That is, the dental hydraulic temporary sealing material composition of the present invention is characterized by containing a gypsum powder having a specific surface area of 1.5 m 2 /g or more and/or a pore volume of 0.015 cc/g or more.
本発明の歯科用水硬性仮封材組成物の一実施形態としては、前記石こう粉末がβ型半水石こうであることが好ましい。 In one embodiment of the dental hydraulic temporary sealing material composition of the present invention, the gypsum powder is preferably β-type hemihydrate gypsum.
本発明の歯科用水硬性仮封材組成物の他の実施形態としては、前記石こう粉末の５０％粒子径が１μｍ以上であることが好ましい。 In another embodiment of the dental hydraulic temporary sealing material composition of the present invention, it is preferable that the 50% particle size of the gypsum powder is 1 μm or more.
本発明の歯科用水硬性仮封材組成物の他の実施形態としては、有機溶媒、及び樹脂を含むことが好ましい。 In another embodiment of the dental hydraulic temporary sealing material composition of the present invention, it is preferable to include an organic solvent and a resin.
本発明の歯科用水硬性仮封材組成物の他の実施形態としては、組成物全体に対して、石こう粉末を２０～８５質量％、有機溶媒を１０～２５質量％、及び樹脂を３～１５質量％含むことが好ましい。 In another embodiment of the dental hydraulic temporary sealing material composition of the present invention, it is preferable that the composition contains 20 to 85 mass% of gypsum powder, 10 to 25 mass% of an organic solvent, and 3 to 15 mass% of a resin, based on the total mass of the composition.
本発明の歯科用水硬性仮封材組成物の他の実施形態としては、有機溶媒がグリセリン、若しくはその誘導体から選ばれる少なくとも一種であることが好ましい。 In another embodiment of the dental hydraulic temporary sealing material composition of the present invention, it is preferable that the organic solvent is at least one selected from glycerin or its derivatives.
本発明の歯科用水硬性仮封材組成物の他の実施形態としては、樹脂が酢酸ビニル、又は塩化ビニルの単独重合体、又はそれらの共重合体から選ばれる少なくとも一種であることが好ましい。 In another embodiment of the dental hydraulic temporary sealing material composition of the present invention, the resin is preferably at least one selected from a homopolymer of vinyl acetate or vinyl chloride, or a copolymer thereof.
本発明によれば、高い硬化性を有しつつ、硬化後の除去性に優れる歯科用水硬性仮封材組成物を提供することができる。 According to the present invention, it is possible to provide a dental hydraulic temporary sealing material composition that has high curing properties and excellent removability after curing.
本発明の歯科用水硬性仮封材組成物は比表面積が１．５ｍ２／ｇ以上、及び／又は、細孔容積が０．０１５ｃｃ／ｇ以上である成分（１）石こう粉末を含むことを特徴とする。 The dental hydraulic temporary sealing material composition of the present invention is characterized by containing the component (1) gypsum powder having a specific surface area of 1.5 m 2 /g or more and/or a pore volume of 0.015 cc/g or more.
成分（１）石こう粉末は水の存在下で反応・硬化する成分であり、本発明の歯科用水硬性仮封材組成物に硬化性を与える成分である。本発明における成分（１）石こう粉末とは硫酸カルシウム半水和物を意味する。 Component (1) gypsum powder is a component that reacts and hardens in the presence of water, and is a component that imparts hardening properties to the dental hydraulic temporary sealing material composition of the present invention. Component (1) gypsum powder in the present invention means calcium sulfate hemihydrate.
成分（１）石こう粉末は比表面積が１．５ｍ２／ｇ以上、及び／又は、細孔容積が０．０１５ｃｃ／ｇ以上でなければならならず、比表面積が２ｍ２／ｇ以上、及び／又は、細孔容積が０．０２ｃｃ／ｇ以上であることが好ましく、比表面積が４ｍ２／ｇ以上、及び／又は、細孔容積が０．０３ｃｃ／ｇ以上であることが更に好ましい。比表面積が１．５ｍ２／ｇ未満、及び／又は、細孔容積が０．０１５ｃｃ／ｇ未満になると硬化体が硬くなりすぎ、硬化後の除去性が悪くなることがある。 Component (1) gypsum powder must have a specific surface area of 1.5 m 2 /g or more and/or a pore volume of 0.015 cc/g or more, preferably a specific surface area of 2 m 2 /g or more and/or a pore volume of 0.02 cc/g or more, and more preferably a specific surface area of 4 m 2 /g or more and/or a pore volume of 0.03 cc/g or more. If the specific surface area is less than 1.5 m 2 /g and/or the pore volume is less than 0.015 cc/g, the hardened body may become too hard and may be difficult to remove after hardening.
成分（１）石こう粉末の種類、及び製造方法に特に制限はなく、従来より公知のα型半水石こうやβ型半水石こう、若しくはこれらを混合したものを用いることができる。中でも、β型半水石こうを用いることが好ましい。β型半水石こうを用いることで優れた硬化後の除去性をより顕著に発現させることができる。 Component (1) There are no particular restrictions on the type of gypsum powder or the manufacturing method, and conventionally known alpha-type hemihydrate gypsum, beta-type hemihydrate gypsum, or a mixture of these can be used. Of these, beta-type hemihydrate gypsum is preferably used. By using beta-type hemihydrate gypsum, excellent removability after hardening can be more significantly achieved.
成分（１）石こう粉末の５０％粒子径に特に制限はないものの、１μｍ以上であることが好ましく、３０μｍ以上であることが更に好ましい。５０％粒子径を１μｍ以上とすることで、高い硬化性、及び優れた硬化後の除去性をより顕著に発現させることができる。 While there are no particular restrictions on the 50% particle size of component (1) gypsum powder, it is preferably 1 μm or more, and more preferably 30 μm or more. By making the 50% particle size 1 μm or more, high hardening properties and excellent post-hardening removability can be more significantly achieved.
成分（１）石こう粉末の含有量に特に制限はないものの、歯科用水硬性仮封材組成物全体に対して２０～８５質量％の範囲内であることが好ましく、４０～７５質量％の範囲内であることが更に好ましい。成分（１）石こう粉末の含有量を２０質量％以上とすることで、高い硬化性を確実に発現させることができる。また、成分（１）石こう粉末の含有量を８５質量％以下とすることで、優れた硬化後の除去性をより顕著に発現させることができる。 Although there are no particular restrictions on the content of component (1) gypsum powder, it is preferably in the range of 20 to 85 mass% and more preferably in the range of 40 to 75 mass% with respect to the entire dental hydraulic temporary sealing material composition. By setting the content of component (1) gypsum powder to 20 mass% or more, high curing properties can be reliably exhibited. Furthermore, by setting the content of component (1) gypsum powder to 85 mass% or less, excellent removability after curing can be more significantly exhibited.
成分（１）石こう粉末の形状に特に制限はなく、球状、針状、板状、破砕状、鱗片状などの任意の形状のものを用いることができる。 Component (1) There are no particular restrictions on the shape of the gypsum powder, and any shape such as spherical, needle-like, plate-like, crushed, or scaly can be used.
成分（２）有機溶媒は本発明の歯科用水硬性仮封材組成物をペースト化させるための成分である。 Component (2) organic solvent is a component for forming the dental hydraulic temporary sealing material composition of the present invention into a paste.
成分（２）有機溶媒は、成分（１）石こう粉末と反応しないものであれば特に制限はなく、公知の有機溶媒を用いることができる。但し、保存安定性の観点から、揮発性の低い有機溶媒を用いることが好ましい。 Component (2) organic solvent is not particularly limited as long as it does not react with component (1) gypsum powder, and any known organic solvent can be used. However, from the perspective of storage stability, it is preferable to use an organic solvent with low volatility.
成分（２）有機溶媒を具体的に例示すると、メタノール、エタノール、プロパノール、イソプロピルアルコール、イソブチルアルコール、エチレングリコール、低分子量ポリエチレングリコール、グリセリンなどのアルコール、酢酸エチル、酢酸ブチル、グリセリンモノアセテート、グリセリンジアセテート、グリセリントリアセテート、グリセリンモノメタクリレート、グリセリンジメタクリレート、グリセリンモノステアラートなどの脂肪酸エステル、ブタン、ペンタン、ヘキサンなどの脂肪族炭化水素、ベンゼン、トルエン、キシレンなどの芳香族炭化水素、メチルエチルケトン、アセトンなどのケトン、ジエチルエーテルなどのエーテル、ジクロロメタン、クロロホルム、四塩化炭素等のハロゲン化アルキル、ジメチルポリシロキサン、ジビニルジメチルポリシロキサンなどのオルガノポリシロキサン、メチルメタクリレート、エチレングリコールジメタクリレート、ヒドロキシエチルメタクリレートなどのメタクリル酸エステルなどが挙げられるが、これらに限定されるものではない。これらは２種類以上を組合せて使用しても良い。その中でもグリセリン、グリセリンモノアセテート、グリセリンジアセテート、グリセリントリアセテート、グリセリンモノメタクリレート、グリセリンジメタクリレート、グリセリンモノステアラートなどのグリセリン、若しくはその誘導体を用いることが好ましい。 Specific examples of component (2) organic solvents include, but are not limited to, alcohols such as methanol, ethanol, propanol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, low-molecular-weight polyethylene glycol, and glycerin; fatty acid esters such as ethyl acetate, butyl acetate, glycerin monoacetate, glycerin diacetate, glycerin triacetate, glycerin monomethacrylate, glycerin dimethacrylate, and glycerin monostearate; aliphatic hydrocarbons such as butane, pentane, and hexane; aromatic hydrocarbons such as benzene, toluene, and xylene; ketones such as methyl ethyl ketone and acetone; ethers such as diethyl ether; alkyl halides such as dichloromethane, chloroform, and carbon tetrachloride; organopolysiloxanes such as dimethylpolysiloxane and divinyldimethylpolysiloxane; and methacrylic acid esters such as methyl methacrylate, ethylene glycol dimethacrylate, and hydroxyethyl methacrylate. These may be used in combination of two or more types. Among these, it is preferable to use glycerin or its derivatives such as glycerin, glycerin monoacetate, glycerin diacetate, glycerin triacetate, glycerin monomethacrylate, glycerin dimethacrylate, and glycerin monostearate.
成分（２）有機溶媒の含有量に特に制限はないものの、歯科用水硬性仮封材組成物全体に対して１０～２５質量％の範囲内であることが好ましく、１５～２５質量％の範囲内であることが更に好ましい。成分（２）有機溶媒の含有量を１０質量％以上とすることで、本発明の歯科用水硬性仮封材組成物が扱いやすいペースト状となり、良好な操作性を付与することができる。また、成分（２）有機溶媒の含有量を２５質量％以下とすることで、ペーストのベタツキを低減し、良好な操作性を付与することができる。 Although there is no particular limitation on the content of the component (2) organic solvent, it is preferably in the range of 10 to 25 mass% and more preferably in the range of 15 to 25 mass% with respect to the entire dental hydraulic temporary sealing material composition. By setting the content of the component (2) organic solvent to 10 mass% or more, the dental hydraulic temporary sealing material composition of the present invention becomes an easy-to-handle paste, and good operability can be imparted. Furthermore, by setting the content of the component (2) organic solvent to 25 mass% or less, stickiness of the paste can be reduced, and good operability can be imparted.
成分（３）樹脂は本発明の歯科用水硬性仮封材組成物に可塑性を与え、ペーストの操作性を調整するための成分である。 Component (3) resin is a component that imparts plasticity to the dental hydraulic temporary sealing material composition of the present invention and adjusts the workability of the paste.
成分（３）樹脂は成分（２）有機溶媒と相溶するものであれば特に制限はなく、公知の樹脂を用いることができる。 Component (3) resin is not particularly limited as long as it is compatible with component (2) organic solvent, and known resins can be used.
成分（３）樹脂を具体的に例示すると、酢酸ビニル、塩化ビニル、アクリル酸、マレイン酸、フマル酸などの単独重合体、及び共重合体、エチレン酢酸ビニル共重合体などが挙げられるが、これらに限定されるものではない。これらは２種類以上を組合せて使用しても良い。その中でも酢酸ビニル、又は塩化ビニルの単独重合体、又はそれらの共重合体を用いることが好ましい。 Specific examples of component (3) resins include, but are not limited to, homopolymers and copolymers of vinyl acetate, vinyl chloride, acrylic acid, maleic acid, fumaric acid, etc., and ethylene-vinyl acetate copolymers. Two or more of these may be used in combination. Among these, it is preferable to use a homopolymer of vinyl acetate or vinyl chloride, or a copolymer thereof.
成分（３）樹脂の含有量に特に制限はないものの、歯科用水硬性仮封材組成物全体に対して３～１５質量％の範囲内であることが好ましく、５～１０質量％の範囲内であることが更に好ましい。成分（３）樹脂の含有量を３質量％以上とすることで、本発明の歯科用水硬性仮封材組成物に十分な可塑性が付与され、良好な操作性を発現させることができる。また、成分（３）樹脂の含有量を１５質量％以下とすることで、高い硬化性、優れた硬化後の除去性をより顕著に発現させることができる。 Although there is no particular limitation on the content of the component (3) resin, it is preferably in the range of 3 to 15 mass % and more preferably in the range of 5 to 10 mass % with respect to the entire dental hydraulic temporary sealing material composition. By setting the content of the component (3) resin to 3 mass % or more, sufficient plasticity can be imparted to the dental hydraulic temporary sealing material composition of the present invention, and good operability can be exhibited. Furthermore, by setting the content of the component (3) resin to 15 mass % or less, high curability and excellent removability after curing can be more significantly exhibited.
更に、本発明の歯科用水硬性仮封材組成物は本発明の効果を阻害しない範囲において、顔料、染料、反応調整剤、充填材、賦形材、界面活性剤、抗菌剤、イオン放出剤などを添加することができる。 Furthermore, pigments, dyes, reaction adjusters, fillers, excipients, surfactants, antibacterial agents, ion-releasing agents, etc. can be added to the dental hydraulic temporary sealing material composition of the present invention within a range that does not impair the effects of the present invention.
以下に本発明の実施例及び比較例について具体的に説明するが、本発明はこれらの実施例に限定されるものではない。 The following provides a detailed explanation of examples and comparative examples of the present invention, but the present invention is not limited to these examples.
（歯科用水硬性仮封材組成物の調製に用いた成分の詳細）
実施例、及び比較例の歯科用水硬性仮封材組成物の調製に用いた成分を表１に示した。成分（１）石こう粉末の比表面積、及び細孔容積はＱｕａｎｔａｃｈｒｏｍｅ ＩＮＳＴＲＵＭＥＮＴＳ社製ＱＵＡＤＲＡＳＯＲＢ ｅｖｏを用いて測定した。尚、試料の前処理として前記分析機器に付属の設備ＦＬＯＶＡＣ Ｄｅｇａｓｓｅｒにて２００℃で２時間減圧乾燥（Ｄｅｇａｓ処理）を行った。成分（１）石こう粉末、及び充填材の５０％粒子径は日機装社製マイクロトラックＭＴ３３００を用いて測定した。
(Details of components used in preparation of dental hydraulic temporary sealing material composition)
The components used in preparing the dental hydraulic temporary sealing material compositions of Examples and Comparative Examples are shown in Table 1. The specific surface area and pore volume of component (1) gypsum powder were measured using QUADRASORB evo manufactured by Quantachrome Instruments. As a pretreatment of the sample, drying under reduced pressure (degassing treatment) was performed at 200°C for 2 hours using a FLOVAC Degasser attached to the analytical instrument. The 50% particle size of component (1) gypsum powder and the filler was measured using Microtrac MT3300 manufactured by Nikkiso Co., Ltd.
（歯科用水硬性仮封材組成物の調製）
表２に示した配合に従い、各成分を計量し、混練機にて混練することで各実施例、及び比較例の歯科用水硬性仮封材組成物を調製した。実施例、及び比較例に示す歯科用水硬性仮封材組成物の評価方法は次の通りである。
(Preparation of dental hydraulic temporary sealing material composition)
Dental hydraulic temporary sealing material compositions of each Example and Comparative Example were prepared by measuring each component and kneading them with a kneader according to the formulation shown in Table 2. The dental hydraulic temporary sealing material compositions shown in Examples and Comparative Examples were evaluated as follows.
（歯科用水硬性仮封材組成物の硬化性）
実施例、及び比較例に示す歯科用水硬性仮封材組成物を内径１５ｍｍ、高さ３ｍｍの金属リングに満たし、試験片を作製した。これを３７℃の恒温水槽に試験片の底面だけが水に接するように浸漬させ３０分間静置後、恒温水槽から試験片を取り出して水分を除去した。試験片天面から重さ１００ｇｆ、直径１ｍｍのビカー針を静かに下ろし、試験片底面からの硬化層の厚みを測定し、それを硬化性とした。尚、硬化性は０．５ｍｍ以上であれば臨床応用可能であり、０．８ｍｍ以上であれば高い硬化性を有していると判断した。
(Curing property of dental hydraulic temporary sealing material composition)
A metal ring with an inner diameter of 15 mm and a height of 3 mm was filled with the dental hydraulic temporary sealing material composition shown in the Examples and Comparative Examples to prepare a test piece. The test piece was immersed in a thermostatic water bath at 37°C so that only the bottom surface of the test piece was in contact with water, and left to stand for 30 minutes, and then the test piece was taken out of the thermostatic water bath to remove moisture. A Vicat needle with a weight of 100 gf and a diameter of 1 mm was gently lowered from the top surface of the test piece, and the thickness of the cured layer from the bottom surface of the test piece was measured, and this was defined as the curability. Note that if the curability was 0.5 mm or more, it was considered to be clinically applicable, and if it was 0.8 mm or more, it was considered to have high curability.
（歯科用水硬性仮封材組成物の硬化後の除去性）
実施例、及び比較例に示す歯科用水硬性仮封材組成物を、歯牙の模型に形成された模擬窩洞に充填し、模型ごと水中に浸漬させた。室温にて３日間静置後、模型を取り出し、硬化した歯科用水硬性仮封材組成物表面の水分を拭き取った。硬化した組成物を金属製のインスツルメントを用いて模擬窩洞から除去し、硬化後の仮封材除去のシミュレーションを行った。このとき、硬化後の組成物が適度に軟らかく、容易に除去できたものを「Ａ」、やや硬いものの、問題なく除去できたものを「Ｂ」、硬くて除去し辛かったものを「Ｃ」、非常に硬く、除去が困難であったものを「Ｄ」とした。
(Removability of dental hydraulic temporary sealing material composition after hardening)
The dental hydraulic temporary sealing material compositions shown in Examples and Comparative Examples were filled into a simulated cavity formed in a tooth model, and the model was immersed in water. After standing at room temperature for 3 days, the model was taken out, and moisture on the surface of the hardened dental hydraulic temporary sealing material composition was wiped off. The hardened composition was removed from the simulated cavity using a metal instrument, and a simulation of removal of the temporary sealing material after hardening was performed. At this time, the hardened composition was rated as "A" if it was moderately soft and could be easily removed, "B" if it was somewhat hard but could be removed without any problems, "C" if it was hard and difficult to remove, and "D" if it was very hard and difficult to remove.
（実施例、及び比較例の評価結果）
表２に各実施例、及び比較例の歯科用水硬性仮封材組成物の評価結果を示した。
(Evaluation Results of Examples and Comparative Examples)
Table 2 shows the evaluation results of the dental hydraulic temporary sealing material compositions of each Example and Comparative Example.
実施例１は比表面積が１．５ｍ２／ｇ未満、及び細孔容積が０．０１５ｃｃ／ｇ以上である石こう粉末３を用いて調製した組成物である。
実施例１では１．４４ｍｍと高い硬化性を示した。また、硬化後の組成物はやや硬いものの、問題なく除去できた。
実施例２は実施例１における石こう粉末の種類を比表面積が１．５ｍ２／ｇ以上、及び細孔容積が０．０１５ｃｃ／ｇ未満である石こう粉末４として調製した組成物である。
実施例２では１．４１ｍｍと高い硬化性を示した。また、硬化後の組成物はやや硬いものの、問題なく除去できた。
実施例３～１３は実施例１における石こう粉末の種類を比表面積が１．５ｍ２／ｇ以上、及び細孔容積が０．０１５ｃｃ／ｇ以上である石こう粉末５～１５として調製した組成物である。
実施例３では１．３５ｍｍと高い硬化性を示した。また、硬化後の組成物はやや硬いものの、問題なく除去できた。
実施例４～１３では１．３～１．５ｍｍ程度の高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例１４～１９は実施例９における有機溶媒の種類を有機溶媒１～３、５～７として調製した組成物である。
実施例１４～１９では１．３～１．６ｍｍ程度の高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２０、及び２１は実施例９における樹脂の種類を樹脂２、又は３として調製した組成物である。
実施例２０、及び２１では１．４ｍｍ程度の高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２２、及び２３は実施例９における石こう粉末の含有量を少なくし、その他の成分の含有量を多くし、且つ充填材１を配合して調製した組成物である。
実施例２２、及び２３では１．０～１．３ｍｍ程度の高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２４は実施例９における石こう粉末の含有量を少なくし、減少分を充填材１に置き換えて調製した組成物である。
実施例２４では１．４３ｍｍと高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２５、及び２６は実施例９における石こう粉末の含有量を多くし、その他の成分の含有量を少なくし、且つ充填材１を配合して調製した組成物である。
実施例２５、及び２６では１～３ｍｍ程度の高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２７は実施例５における石こう粉末の含有量を少なくし、その他の成分の含有量を多くし、且つ充填材１を配合して調製した組成物である。
実施例２７では０．９１ｍｍと高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２８は実施例５における石こう粉末の含有量を少なくし、減少分を充填材１に置き換えて調製した組成物である。
実施例２８では１．３６ｍｍと高い硬化性を示した。また、硬化後の組成物は適度に軟らかく、容易に除去できた。
実施例２９は実施例５における石こう粉末の含有量を多くし、その他の成分の含有量を少なくし、且つ充填材１を配合して調製した組成物である。
実施例２９では３．０４ｍｍと高い硬化性を示した。また、硬化後の組成物はやや硬いものの、問題なく除去できた。
比較例１は実施例２２における石こう粉末の種類を比表面積が１．５ｍ２／ｇ未満、及び細孔容積が０．０１５ｃｃ／ｇ未満である石こう粉末１として調製した組成物である。
比較例１では０．９４ｍｍと高い硬化性を示したものの、硬化後の組成物は硬くて除去し辛かった。
比較例２は実施例９における石こう粉末の種類を石こう粉末１として調製した組成物である。
比較例２では１．４５ｍｍと高い硬化性を示したものの、硬化後の組成物は硬くて除去し辛かった。
比較例３は実施例２６における石こう粉末の種類を石こう粉末１として調製した組成物である。
比較例３では３．０５ｍｍと高い硬化性を示したものの、硬化後の組成物は非常に硬く、除去が困難であった。
比較例４は実施例９における石こう粉末の種類を比表面積が１．５ｍ２／ｇ未満、及び細孔容積が０．０１５ｃｃ／ｇ未満である石こう粉末２として調製した組成物である。
比較例４では１．３８ｍｍと高い硬化性を示したものの、硬化後の組成物は硬くて除去し辛かった。
Example 1 is a composition prepared using gypsum powder 3 having a specific surface area of less than 1.5 m 2 /g and a pore volume of 0.015 cc/g or more.
In Example 1, high curability was observed, with a thickness of 1.44 mm. Although the composition was somewhat hard after curing, it could be removed without any problems.
Example 2 is a composition prepared by changing the type of gypsum powder in Example 1 to gypsum powder 4 having a specific surface area of 1.5 m 2 /g or more and a pore volume of less than 0.015 cc/g.
In Example 2, the thickness was 1.41 mm, which was a high level of curability. Although the composition was somewhat hard after curing, it could be removed without any problems.
Examples 3 to 13 are compositions prepared by changing the type of gypsum powder in Example 1 to gypsum powders 5 to 15 having a specific surface area of 1.5 m 2 /g or more and a pore volume of 0.015 cc/g or more.
In Example 3, high curability was observed with a thickness of 1.35 mm. Although the composition was somewhat hard after curing, it could be removed without any problems.
High curing properties of about 1.3 to 1.5 mm were observed in Examples 4 to 13. Furthermore, the cured compositions were moderately soft and could be easily removed.
Examples 14 to 19 are compositions prepared by replacing the organic solvents in Example 9 with organic solvents 1 to 3 and 5 to 7.
Examples 14 to 19 showed high curability of about 1.3 to 1.6 mm. Furthermore, the cured compositions were moderately soft and could be easily removed.
Examples 20 and 21 are compositions prepared in the same manner as in Example 9 except that the resin type was changed to Resin 2 or 3.
High curing properties of about 1.4 mm were observed in Examples 20 and 21. Furthermore, the cured compositions were moderately soft and easily removable.
Examples 22 and 23 are compositions prepared by reducing the content of gypsum powder in Example 9, increasing the contents of other components, and blending Filler 1.
High curing properties of about 1.0 to 1.3 mm were observed in Examples 22 and 23. Furthermore, the cured compositions were moderately soft and could be easily removed.
Example 24 is a composition prepared by reducing the content of gypsum powder in Example 9 and replacing the reduced amount with Filler 1.
Example 24 showed high curability with a thickness of 1.43 mm. Furthermore, the composition after curing was moderately soft and could be easily removed.
Examples 25 and 26 are compositions prepared by increasing the content of gypsum powder in Example 9, decreasing the contents of other components, and blending Filler 1.
High curing properties of about 1 to 3 mm were observed in Examples 25 and 26. Furthermore, the cured compositions were moderately soft and could be easily removed.
Example 27 is a composition prepared by reducing the content of gypsum powder in Example 5, increasing the contents of other components, and blending Filler 1.
Example 27 showed high curability with a thickness of 0.91 mm. Furthermore, the composition after curing was moderately soft and could be easily removed.
Example 28 is a composition prepared by reducing the content of gypsum powder in Example 5 and replacing the reduced amount with Filler 1.
Example 28 showed high curability with a thickness of 1.36 mm. Furthermore, the composition after curing was moderately soft and could be easily removed.
Example 29 is a composition prepared by increasing the content of gypsum powder in Example 5, decreasing the contents of other components, and blending Filler 1.
Example 29 showed high curability with a thickness of 3.04 mm. Although the composition was somewhat hard after curing, it could be removed without any problems.
Comparative Example 1 is a composition prepared by changing the type of gypsum powder in Example 22 to gypsum powder 1 having a specific surface area of less than 1.5 m 2 /g and a pore volume of less than 0.015 cc/g.
In Comparative Example 1, high curability was observed with a thickness of 0.94 mm, but the composition after curing was hard and difficult to remove.
Comparative Example 2 is a composition prepared in Example 9 using Gypsum Powder 1 as the type of gypsum powder.
In Comparative Example 2, high curability was observed with a thickness of 1.45 mm, but the composition after curing was hard and difficult to remove.
Comparative Example 3 is a composition prepared in Example 26 using Gypsum Powder 1 as the type of gypsum powder.
In Comparative Example 3, high curability was observed with a thickness of 3.05 mm, but the composition after curing was very hard and difficult to remove.
Comparative Example 4 is a composition prepared in which the type of gypsum powder in Example 9 was changed to gypsum powder 2 having a specific surface area of less than 1.5 m 2 /g and a pore volume of less than 0.015 cc/g.
In Comparative Example 4, the thickness was 1.38 mm, which was a high degree of curability, but the composition after curing was hard and difficult to remove.
本発明によれば、高い硬化性を有しつつ、硬化後の除去性に優れる歯科用水硬性仮封材組成物を提供することができる。
According to the present invention, it is possible to provide a dental hydraulic temporary sealing material composition which has high curability and excellent removability after curing.
Claims (5)
成分（２）有機溶媒 １０～２５質量％、及び
成分（３）樹脂 ３～１５質量％
を含む歯科用水硬性仮封材組成物であって、
前記成分（１）石こう粉末の比表面積が１．５ｍ２／ｇ以上、及び／又は、細孔容積が０．０１５ｃｃ／ｇ以上であり、
前記成分（１）が石こう粉末が硫酸カルシウム半水和物であり、
前記成分（２）有機溶媒がメタノール、エタノール、プロパノール、イソプロピルアルコール、イソブチルアルコール、エチレングリコール、ポリエチレングリコール、グリセリン、酢酸エチル、酢酸ブチル、グリセリンモノアセテート、グリセリンジアセテート、グリセリントリアセテート、グリセリンモノメタクリレート、グリセリンジメタクリレート、グリセリンモノステアラート、ブタン、ペンタン、ヘキサン、ベンゼン、トルエン、キシレン、メチルエチルケトン、アセトン、ジエチルエーテル、ジクロロメタン、クロロホルム、四塩化炭素、ジメチルポリシロキサン、ジビニルジメチルポリシロキサン、メチルメタクリレート、エチレングリコールジメタクリレート、及び、ヒドロキシエチルメタクリレートからなる群より選ばれる少なくとも一種であり、
前記成分（３）樹脂が酢酸ビニル、塩化ビニル、アクリル酸、マレイン酸、及び、フマル酸のいずれかの単独重合体、酢酸ビニル、塩化ビニル、アクリル酸、マレイン酸、及び、フマル酸からなる群より選ばれる２以上の共重合体、並びに、エチレン酢酸ビニル共重合体からなる群より選ばれる少なくとも一種であることを特徴とする歯科用水硬性仮封材組成物。 Ingredients (1) gypsum powder 20-85% by mass,
Component (2) an organic solvent: 10 to 25% by mass, and
Component (3) Resin 3-15% by mass
A dental hydraulic temporary sealing material composition comprising:
The component (1) gypsum powder has a specific surface area of 1.5 m 2 /g or more and/or a pore volume of 0.015 cc/g or more ;
The component (1) is a gypsum powder containing calcium sulfate hemihydrate,
the component (2) organic solvent is at least one selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, polyethylene glycol, glycerin, ethyl acetate, butyl acetate, glycerin monoacetate, glycerin diacetate, glycerin triacetate, glycerin monomethacrylate, glycerin dimethacrylate, glycerin monostearate, butane, pentane, hexane, benzene, toluene, xylene, methyl ethyl ketone, acetone, diethyl ether, dichloromethane, chloroform, carbon tetrachloride, dimethylpolysiloxane, divinyldimethylpolysiloxane, methyl methacrylate, ethylene glycol dimethacrylate, and hydroxyethyl methacrylate;
a dental hydraulic temporary sealing material composition, wherein the component (3) resin is at least one selected from the group consisting of a homopolymer of any one of vinyl acetate, vinyl chloride, acrylic acid, maleic acid, and fumaric acid, a copolymer of two or more selected from the group consisting of vinyl acetate, vinyl chloride, acrylic acid, maleic acid, and fumaric acid, and an ethylene- vinyl acetate copolymer.
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