JP2952388B2 - Separating agent for dental photopolymerization resin - Google Patents

Separating agent for dental photopolymerization resin

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Publication number
JP2952388B2
JP2952388B2 JP2189871A JP18987190A JP2952388B2 JP 2952388 B2 JP2952388 B2 JP 2952388B2 JP 2189871 A JP2189871 A JP 2189871A JP 18987190 A JP18987190 A JP 18987190A JP 2952388 B2 JP2952388 B2 JP 2952388B2
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Japan
Prior art keywords
weight
parts
separating agent
dental
resin
Prior art date
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Expired - Fee Related
Application number
JP2189871A
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Japanese (ja)
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JPH0475652A (en
Inventor
彰二 中村
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Shofu Inc
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Shofu Inc
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  • Dental Prosthetics (AREA)
  • Dental Preparations (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、石膏模型に塗布乾燥することにより、石膏
模型の色調による光の吸収に起因する重合の遅延作用を
防ぐことを目的とする、歯科光重合樹脂用分離剤に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention aims to prevent a delay effect of polymerization caused by light absorption by a color tone of a gypsum model by coating and drying on a gypsum model. The present invention relates to a separating agent for a dental photopolymerizable resin.

(従来の技術) 従来、石膏型と樹脂のための離型材料としては、光重
合においてもパラフィン、ステアリン酸等のワックス状
のもの、ポリビニルアルコール、アルギン酸ソーダ等の
水溶液、酢酸繊維素のアセトン溶液、酢酸ビニル−塩化
ビニル共重合物、ポリエチレン等のエマルジョン重合物
などが使用されているが、その他にも最近重合防止剤
(重合禁止剤)を含ませたもの(特開平1−136653)な
どが提案されている。
(Prior art) Conventionally, mold release materials for gypsum molds and resins include waxy materials such as paraffin and stearic acid, aqueous solutions such as polyvinyl alcohol and sodium alginate, and acetone solutions of cellulose acetate even in photopolymerization. , Vinyl acetate-vinyl chloride copolymers, emulsion polymers such as polyethylene, and the like, and recently, those containing a polymerization inhibitor (polymerization inhibitor) (JP-A-1-136653). Proposed.

しかしながら、これらの分離膜は塗布乾燥後通常透明
又は半透明であるから石膏型の色調を直接反映し、多く
の石膏が技工上の理由から黄色、緑色、青色等に着色さ
れているため、光重合に際し照射光が一部吸収され、模
型に接した樹脂部分の重合が阻害され、硬化の不均一が
起こり、十分な強度が得られなかった。また、重合禁止
剤を含ませた分離剤組成物については、分離剤との接触
面での重合禁止作用が加算され、顕著にその現象が現れ
た。
However, since these separation membranes are usually transparent or translucent after coating and drying, they directly reflect the color of the gypsum mold, and many gypsum are colored yellow, green, blue, etc. for technical reasons. Irradiation light was partially absorbed during the polymerization, polymerization of the resin portion in contact with the model was inhibited, and uneven curing occurred, resulting in insufficient strength. In addition, for the separating agent composition containing the polymerization inhibitor, the effect of inhibiting the polymerization at the contact surface with the separating agent was added, and the phenomenon was remarkable.

このような、硬化不良は後熱処理で強度の回復を計る
ことは困難で、最後まで成型品の強度に影響を及ぼし、
歯科修復物としての強度の確保が困難となる問題点、及
び硬化の不均一に起因すると思われるクラック発生等の
問題点があった。
Such poor curing is difficult to recover the strength by post heat treatment, and affects the strength of the molded product until the end,
There are problems that it is difficult to secure the strength as a dental restoration, and cracks that are considered to be caused by uneven curing.

すなわち歯科治療において、例えばレジンインレーや
レジンクラウンの場合のように、治療を要する患部の印
象をとり、その印象に石膏を用いて患部の形状を再現し
た模型を製作する。その模型上で患者が正常な機能を回
復できるように、歯科光重合樹脂を適用して光重合した
硬化成型品を直接又は後熱処理をして一段と性能を向上
させて、患部に歯科用接着剤を用いて装着することで治
療を行うことがある。石膏模型に歯科用樹脂を適用する
とき、石膏は多孔質であり、歯科用樹脂との離型性は全
くないので、あらかじめ離型処理を行う必要がある。こ
の離型処理として従来より、高分子結合剤又は高分子造
膜剤の造膜性を利用する分離剤を塗布乾燥する手法がと
られていた。
That is, in dental treatment, as in the case of, for example, a resin inlay or a resin crown, an impression of an affected area requiring treatment is taken, and a plaster is used for the impression to produce a model reproducing the shape of the affected area. Applying a dental photopolymerization resin directly or post-heat-treating the cured molded product by applying a dental photopolymerization resin to further improve the performance so that the patient can recover the normal function on the model, further improving the performance, and applying a dental adhesive to the affected area The treatment may be performed by wearing the device. When applying the dental resin to the gypsum model, the gypsum is porous and has no releasability from the dental resin, so it is necessary to perform a release treatment in advance. Conventionally, as this release treatment, a method of applying and drying a separating agent utilizing the film forming property of a polymer binder or a polymer film forming agent has been adopted.

一方、石膏模型の石膏は歯科技工操作の理由から、白
色石膏を用いることは少なく、黄色、青色、緑色等に着
色したものが好んで使用されている現状である。従っ
て、このような石膏型に、歯科光重合樹脂を適用し、光
照射を行っても模型の色調の影響を受け、通常無着色品
の5〜7割程度の硬度の成型品しか得られない。また、
このような成型品を後熱処理をしても、期待するほどの
硬度の上昇は認められず、6〜8割程度の硬度の成型
品、すなわち強度の低い成型品しか得られない問題点が
あった。
On the other hand, as the plaster of the plaster model, white plaster is rarely used because of the operation of the dental technics, and the plaster colored in yellow, blue, green or the like is currently used. Therefore, even if a dental photopolymerization resin is applied to such a gypsum mold and light irradiation is performed, it is affected by the color tone of the model, and only a molded product having a hardness of about 50 to 70% of that of an uncolored product is normally obtained. . Also,
Even if such a molded product is subjected to post-heat treatment, the increase in hardness as expected is not recognized, and there is a problem that only a molded product having a hardness of about 60 to 80%, that is, a molded product with low strength, can be obtained. Was.

このような成型品が患部に歯科用接着剤を介して、患
部に装着されると、成型品自体の強度不足による咬合圧
等の外力による割れや欠けが生じたり、接着層及び成型
品内部に残存する不均一な歪みが原因すると思われるク
ラックなどが生じたりする。これらの欠陥から唾液が進
入し、やがて二次う蝕の原因となりかねない。
When such a molded article is attached to the affected area via a dental adhesive, the molded article itself may be cracked or chipped due to external force such as occlusal pressure due to insufficient strength of the molded article itself, or may be formed inside the adhesive layer and the molded article. Cracks and the like that are considered to be caused by the remaining non-uniform distortion may occur. Saliva can enter from these defects and eventually cause secondary caries.

(発明が解決しようとする問題点) 本発明の目的は、前記の問題点を解決することにあ
り、石膏模型に塗布乾燥後、石膏型より成型品を取り出
した後も、樹脂の硬化不良及び不均一を起こさないよう
な分離剤を提供することにある。
(Problems to be Solved by the Invention) An object of the present invention is to solve the above-mentioned problems, and after coating and drying on a gypsum model, and after taking out a molded product from a gypsum mold, poor curing of resin and An object of the present invention is to provide a separating agent that does not cause nonuniformity.

(課題を解決するための手段) 本発明は上記の目的を達成するため鋭意研究を重ねた
結果、本発明者により光反射性顔料を加えることが、こ
の目的に適合することを見いだし、この発明に到達し
た。
(Means for Solving the Problems) As a result of intensive studies to achieve the above object, the present invention has found that the addition of a light-reflective pigment by the present inventor is suitable for this purpose. Reached.

本発明で用いる高分子結合剤又は高分子造膜剤は、水
溶性、油溶性であることを問わない。すなわち水溶性で
は、ポリビニルアルコール、ポリアクリル酸ソーダ、ポ
リエチレンオキシド等の合成品、ビスコース、メチルセ
ルロース、エチルセルロース、カルボキシメチルセルロ
ース、カルボキシエチルセルロース、カルボキシメチル
澱粉等の半合成品、澱粉、アルギン酸ソーダ、アラビヤ
ゴム、ゼラチン等の天然品があげられる。油溶性では、
ポリ酢酸ビニル、ポリ塩化ビニル、ポリスチロール、ポ
リメチル(メタ)アクリレート等及びこれらの共重合物
である熱可塑性合成高分子、ニトロセルロース、酢酸セ
ルロース等の半合成品、セラック、松脂、ガッターパー
チャ、コーパル等の天然品があげられる。
The polymer binder or polymer film-forming agent used in the present invention may be water-soluble or oil-soluble. That is, in the case of water-soluble, synthetic products such as polyvinyl alcohol, sodium polyacrylate, polyethylene oxide, etc., semi-synthetic products such as viscose, methylcellulose, ethylcellulose, carboxymethylcellulose, carboxyethylcellulose, carboxymethylstarch, starch, sodium alginate, arabic gum, gelatin And other natural products. With oil solubility,
Polyvinyl acetate, polyvinyl chloride, polystyrene, polymethyl (meth) acrylate, etc. and their synthetic thermoplastic synthetic polymers, nitrocellulose, cellulose acetate and other semi-synthetic products, shellac, pine resin, gutter percha, copal And other natural products.

本発明で用いる光反射性顔料としては、酸化チタン、
酸化亜鉛、酸化ジルコニウム、硫酸バリウム、アルミニ
ウム金属粉等主に白色系の顔料があげられるが、高分子
結合剤又は高分子造膜剤及び溶媒により規制される屈折
率の差が0.5以上あることが望ましい。両者の屈折率の
差が0.5以下に接近すると透明性がでてきたり、ある屈
折率の範囲で緑色に着色したりすることが知られている
ので、十分にこれらの材料と屈折率が離れている酸化チ
タンが最も望ましい。
As the light reflective pigment used in the present invention, titanium oxide,
Although mainly white pigments such as zinc oxide, zirconium oxide, barium sulfate, and aluminum metal powder are used, the difference in refractive index regulated by the polymer binder or polymer film forming agent and the solvent may be 0.5 or more. desirable. It is known that when the difference between the two refractive indices approaches 0.5 or less, transparency occurs or the material is colored green in a certain refractive index range. Titanium oxide is most desirable.

本発明に用いられる溶媒としては、水、アセトン、エ
チルアルコール、イソプロピルアルコール、メチルエチ
ルケトン、酢酸エチル、酢酸ブチル、四塩化炭素、クロ
ロホルム、ベンゼン、トルエン等を高分子結合剤又は高
分子造膜剤に合わせ適宜選択使用すればよい。
As a solvent used in the present invention, water, acetone, ethyl alcohol, isopropyl alcohol, methyl ethyl ketone, ethyl acetate, butyl acetate, carbon tetrachloride, chloroform, benzene, toluene, etc. are combined with a polymer binder or a polymer film-forming agent. It may be appropriately selected and used.

なお、本発明の分離剤には必要に応じ、光反射を防げ
ない無機又は有機の微粉末すなわち粒子径が1mμより10
μm、好ましくは3mμより5μmの範囲の二酸化けい素
(シリカ)、アルミナ、炭酸カルシウム、炭酸マグネシ
ウム、ケイ酸マグネシウム、ケイ酸カルシウム等の無機
粉末、ポリメチルメタクリレート、ポリスチロール、ポ
リ塩化ビニル等の有機粉末を50重量%以下で使用され
る。このような、粉末の使用により分離剤の粘度を上げ
たり、揺変性の付与を計り、石膏模型に塗布する場合、
応々に発生している模型の凹部を埋め平滑面とすること
が容易となる。
Incidentally, the separating agent of the present invention, if necessary, an inorganic or organic fine powder that cannot prevent light reflection, that is, a particle diameter of 1 mμ to 10
Inorganic powders such as silicon dioxide (silica), alumina, calcium carbonate, magnesium carbonate, magnesium silicate, calcium silicate, etc., and organic materials such as polymethyl methacrylate, polystyrene, polyvinyl chloride, etc. The powder is used in less than 50% by weight. When the viscosity of the separating agent is increased by the use of such a powder or the thixotropic property is measured and applied to a gypsum model,
It becomes easy to fill the concave portion of the model which is occurring appropriately and make it a smooth surface.

(発明の効果) 前述のように、本発明にかかる分離剤は従来の分離剤
と塗布乾燥の手間は何ら変わるところがなく、容易に造
膜することができ、石膏型の色による光の吸収を排除
し、樹脂の硬化に対する遅延作用が起こらず、むしろ光
の反射や散乱による促進作用により、表面層と底面層の
硬化反応の差が縮まり、後処理工程における熱処理によ
る後硬化が能率的に行える効果がある。
(Effect of the Invention) As described above, the separation agent according to the present invention can be easily formed into a film without any change in the time required for application and drying as compared with the conventional separation agent, and absorbs light due to the color of the plaster mold. Eliminates the effect of retarding the curing of the resin. Rather, the effect of reflection and scattering of light promotes the difference in the curing reaction between the surface layer and the bottom layer. This allows efficient post-curing by heat treatment in the post-treatment process. effective.

(実施例) 以下実施例により、本発明を更に詳細に説明するが、
本発明はこれらの実施例に限定されるものではない。
(Examples) Hereinafter, the present invention will be described in more detail with reference to Examples.
The present invention is not limited to these examples.

なお、実施例及び比較例に用いた硬化の判定方法は、
石膏型(試料の大きさ:深さ2mm、直径4mm)に分離剤を
塗布乾燥し(その膜厚さは15±3μmのものを選択使用
した)歯科光重合用樹脂(株式会社 松風製「ライトフ
ィルCRインレーコンポジット」)を充填し、可視光線照
射器(株式会社 松風製「デイライトランプII」)を30
秒照射後試料を取り出し、ヌープ硬度計で表面(照射
面)及び底面(石膏型接触面)の2点を測定した。石膏
型は黄色及び緑色の石膏型を使用した。更にこれらの試
料を120℃10分間熱処理して各々硬度を測定した。
In addition, the method of judging the curing used in the examples and comparative examples,
Gypsum mold (sample size: depth 2mm, diameter 4mm), apply a separating agent and dry it (select the film thickness of 15 ± 3μm). Dental photopolymerization resin (Matsufu “Light” Fill CR Inlay Composite ") and install a visible light irradiator (Matsufu" Daylight Lamp II ") for 30
After irradiation for 2 seconds, the sample was taken out, and two points of a surface (irradiated surface) and a bottom surface (gypsum type contact surface) were measured with a Knoop hardness meter. As the plaster mold, yellow and green plaster molds were used. Further, these samples were heat-treated at 120 ° C. for 10 minutes, and the hardness was measured.

比較例1 ポリエチレンオキサイド(分子量約50万):2重量部、
水:65重量部、エチルアルコール:14重量部、イソプロピ
ルアルコール:14重量部、グリセリン:4重量部、アエロ
ジル200〔日本アエロジル株式会社製シリカ(以下同
様)〕:1重量部をコロイドミルを通して均質な分散液と
し、石膏模型に塗布乾燥して使用した。結果を表1に示
す。
Comparative Example 1 Polyethylene oxide (molecular weight: about 500,000): 2 parts by weight,
Water: 65 parts by weight, ethyl alcohol: 14 parts by weight, isopropyl alcohol: 14 parts by weight, glycerin: 4 parts by weight, Aerosil 200 [silica manufactured by Nippon Aerosil Co., Ltd. (the same applies hereinafter)): 1 part by weight was homogenized through a colloid mill. It was used as a dispersion, applied to a plaster model and dried. Table 1 shows the results.

実施例1、2 比較例1の配合物100重量部に対し酸化チタンを30重
量部加えたものを実施例1、50重量部加えたものを実施
例2とし、比較例1と同様に製造し、石膏模型に適用し
た。結果を表1に示す。
Examples 1 and 2 Example 1 was obtained by adding 30 parts by weight of titanium oxide to 100 parts by weight of the compound of Comparative Example 1, and Example 2 was obtained by adding 50 parts by weight. , Applied to a plaster model. Table 1 shows the results.

比較例2 酢酸セルロース:4重量部、エチルアルコール:7重量
部、ベンゼン:10重量部、アセトン:25重量部、シクロヘ
キサノン:47重量部、メチルエチルケトン:7重量部の配
合で溶解し、石膏模型に塗布乾燥して使用した。結果を
表1に示す。
Comparative Example 2 Cellulose acetate: 4 parts by weight, ethyl alcohol: 7 parts by weight, benzene: 10 parts by weight, acetone: 25 parts by weight, cyclohexanone: 47 parts by weight, methyl ethyl ketone: 7 parts by weight were dissolved and applied to a gypsum model. Used after drying. Table 1 shows the results.

実施例3、4 比較例2の配合物100重量部に対し酸化チタンを30重
量部アエロジル200を1重量部加えたものを実施例3と
し、酸化チタンを50重量部、アエロジル200を1重量部
加えたものを実施例4とし、各々コロイドミルを通して
均一な分散液とし、石膏模型に塗布乾燥して使用した。
結果を表1に示す。
Examples 3 and 4 30 parts by weight of titanium oxide and 1 part by weight of Aerosil 200 were added to 100 parts by weight of the compound of Comparative Example 2, and the result was Example 3. 50 parts by weight of titanium oxide and 1 part by weight of Aerosil 200 were used. The addition was made into Example 4, and each was made into a uniform dispersion through a colloid mill, applied to a plaster model, and dried.
Table 1 shows the results.

比較例3 酢酸ビニル系エマルジョン(樹脂50、水50):30重量
部、水:70重量部の配合で稀釈後、石膏型に塗布乾燥し
て使用した。結果を表2に示す。
Comparative Example 3 A vinyl acetate emulsion (resin 50, water 50): 30 parts by weight and water: 70 parts by weight were diluted, applied to a plaster mold, and dried. Table 2 shows the results.

実施例5、6 比較例3の配合物100重量部に、酸化チタン:10重量
部、炭酸カルシウム(沈降性):10重量部を加えたもの
を実施例5、酸化チタン:20重量部、炭酸カルシウム
(沈降性):20部を加えたものを実施例6として、各々
コロイドミルを通して均一な分散液とし、石膏型に塗布
乾燥して使用した。結果を表2に示す。
Examples 5 and 6 To 100 parts by weight of the blend of Comparative Example 3, 10 parts by weight of titanium oxide and 10 parts by weight of calcium carbonate (sedimentation property) were added. Calcium (precipitating): A dispersion obtained by adding 20 parts of Example 6 was used as a uniform dispersion liquid through a colloid mill, applied to a gypsum mold, and dried. Table 2 shows the results.

比較例4 酢酸ビニル−塩化ビニル共重合物(ビニライトVYHH:
ビニライト社製):10重量部、DOPジオクチルフタレー
ト:10重量部、メチルエチルケトン:80重量部を完全に溶
解し、石膏模型に塗布乾燥して使用した。結果を表2に
示す。
Comparative Example 4 Vinyl acetate-vinyl chloride copolymer (vinylite VYHH:
Vinylite): 10 parts by weight, DOP dioctyl phthalate: 10 parts by weight, and methyl ethyl ketone: 80 parts by weight were completely dissolved, applied to a plaster model and dried for use. Table 2 shows the results.

実施例7、8 比較例4の配合物100重量部に酸化チタン:20部を加え
たものを実施例7、酸化チタン40部を加えたものを実施
例8とし、コロイドミルを通して均一な分散液とした。
石膏型に塗布乾燥して用いた。結果を表2に示す。
Examples 7 and 8 A mixture obtained by adding 20 parts by weight of titanium oxide to 100 parts by weight of the compound of Comparative Example 4 is referred to as Example 7, and a mixture obtained by adding 40 parts by weight of titanium oxide is referred to as Example 8. And
It was applied to a plaster mold and dried before use. Table 2 shows the results.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】下記成分 (a) 高分子結合剤又は高分子造膜剤、 (b) 光反射性顔料及び (c) 溶剤、 を主成分として含む組成物を特徴とする、歯科光重合樹
脂用分離剤。
1. A dental photopolymerizable resin characterized by comprising a composition containing the following components as main components: (a) a polymer binder or a polymer film-forming agent; (b) a light-reflective pigment; and (c) a solvent. For separating agent.
【請求項2】光反射性顔料と高分子結合剤又は高分子造
膜剤及び溶剤の屈折率の差が0.5以上である請求項1記
載の歯科光重合樹脂用分離剤。
2. The separating agent for a dental photopolymerizable resin according to claim 1, wherein the difference between the refractive indices of the light reflective pigment, the polymer binder or the polymer film forming agent and the solvent is 0.5 or more.
【請求項3】光反射性顔料が酸化チタンである請求項1
乃至2の歯科光重合樹脂用分離剤。
3. The light-reflective pigment is titanium oxide.
And 2) a separating agent for a dental photopolymerizable resin.
JP2189871A 1990-07-18 1990-07-18 Separating agent for dental photopolymerization resin Expired - Fee Related JP2952388B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2189871A JP2952388B2 (en) 1990-07-18 1990-07-18 Separating agent for dental photopolymerization resin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2189871A JP2952388B2 (en) 1990-07-18 1990-07-18 Separating agent for dental photopolymerization resin

Publications (2)

Publication Number Publication Date
JPH0475652A JPH0475652A (en) 1992-03-10
JP2952388B2 true JP2952388B2 (en) 1999-09-27

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Family Applications (1)

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JP2189871A Expired - Fee Related JP2952388B2 (en) 1990-07-18 1990-07-18 Separating agent for dental photopolymerization resin

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6305936B1 (en) * 1997-02-19 2001-10-23 Ultradent Products, Inc. Polymerizable isolation barriers with reduced polymerization strength and methods for forming and using such barriers
DE19959255C1 (en) * 1999-12-09 2001-06-21 Heraeus Kulzer Gmbh & Co Kg Dental isolating material, useful e.g. in the production of dental prostheses, comprises water, alcohol and polyvinyl alcohol
DE19959514C1 (en) * 1999-12-09 2001-08-30 Heraeus Kulzer Gmbh & Co Kg Dental investment material

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Publication number Publication date
JPH0475652A (en) 1992-03-10

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