JPH04330006A - Dental investment and mold for dental investment - Google Patents
Dental investment and mold for dental investmentInfo
- Publication number
- JPH04330006A JPH04330006A JP3128447A JP12844791A JPH04330006A JP H04330006 A JPH04330006 A JP H04330006A JP 3128447 A JP3128447 A JP 3128447A JP 12844791 A JP12844791 A JP 12844791A JP H04330006 A JPH04330006 A JP H04330006A
- Authority
- JP
- Japan
- Prior art keywords
- dental investment
- mold
- dental
- quartz
- cristobalite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 17
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 15
- 239000010440 gypsum Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 29
- 239000010453 quartz Substances 0.000 claims description 17
- 230000035699 permeability Effects 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 13
- 239000012254 powdered material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- TXTCTCUXLQYGLA-UHFFFAOYSA-L calcium;prop-2-enoate Chemical compound [Ca+2].[O-]C(=O)C=C.[O-]C(=O)C=C TXTCTCUXLQYGLA-UHFFFAOYSA-L 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- 239000005350 fused silica glass Substances 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract 1
- 238000013329 compounding Methods 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 239000011044 quartzite Substances 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000006378 damage Effects 0.000 description 10
- 238000005266 casting Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000956 alloy Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Dental Preparations (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は急速焼成してもクラック
、割れ、破壊等の発生がない歯科用埋没材鋳型を安価に
提供できる歯科用埋没材およびこの歯科用埋没材を用い
て成形した歯科用埋没材鋳型に関するものである。[Industrial Application Field] The present invention is directed to a dental investment material that can inexpensively provide a dental investment mold that does not cause cracks, cracks, or destruction even after rapid firing, and molds made using this dental investment material. This invention relates to a dental investment mold.
【０００２】0002
【従来の技術】従来の歯科用埋没材鋳型を成形する歯科
用埋没材としては、焼石膏にクリストバライトを加配し
た石膏ークリストバライト系埋没材と、焼石膏に石英を
加配した石膏ー石英系埋没材とが広く使用されている。[Prior Art] Conventional dental investment materials for molding dental investment molds include a gypsum-cristobalite type investing material made by adding cristobalite to calcined gypsum, and a gypsum-quartz type investing material made by adding quartz to calcined gypsum. is widely used.
【０００３】ところで、この種歯科用埋没材鋳型はワッ
クス歯型を用いて成形後加熱・脱ロウ処理して得られる
中空体であるが、これを用いて鋳造品を得るにはこれを
焼成温度７００ ℃程度の指定焼成温度で焼成して中空
部に鋳造用合金材料を注入するので、この焼成工程で鋳
型にクラック、割れ、破壊等が発生しないように室温程
度の低温より徐々に指定焼成温度まで昇温させていた。
このため、昇温に長時間を要するとともに次の鋳造をす
るには焼成炉の温度を常温近くまで降温する必要があり
、ロスタイムが大きく作業効率が極めて悪いという問題
点があった。また、急加熱ができないので急を要する場
合には対応できないという問題点や、焼成炉の昇降温の
サイクルが激しいので損傷が著しく焼成炉の寿命が短く
なるという問題点もあった。By the way, this type of dental investment mold is a hollow body obtained by heating and dewaxing after molding using a wax tooth mold. Since the casting alloy material is injected into the hollow part after firing at a specified firing temperature of about 700 degrees Celsius, the specified firing temperature is gradually increased from a low temperature of about room temperature to prevent the mold from cracking, splitting, or breaking during this firing process. The temperature was raised to For this reason, it takes a long time to raise the temperature, and in order to perform the next casting, it is necessary to lower the temperature of the kiln to near room temperature, resulting in a problem of large loss time and extremely low work efficiency. Further, there are also problems in that rapid heating is not possible, so it cannot be used in urgent cases, and that the heating and cooling cycles of the firing furnace are intense, resulting in significant damage and shortening the life of the firing furnace.
【０００４】0004
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、急加熱による昇温を行っても
クラック、割れ、破壊等の発生がなくて鋳造時間の大巾
な短縮ができるうえに急を要する場合にも即座に対応し
て鋳型を成形することができ、更には一回の鋳造処理毎
に焼成炉を常温まで降温する必要もなく優れた作業効率
を付与することができる歯科用埋没材鋳型を簡単に提供
できる歯科用埋没材およびこの歯科用埋没材を用いて成
形した歯科用埋没材鋳型を提供することを目的として完
成されたものである。[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems, and eliminates the occurrence of cracks, cracks, destruction, etc. even when the temperature is increased by rapid heating, and the casting time is greatly reduced. In addition to being able to quickly respond to urgent needs, molds can be formed immediately, and there is no need to lower the temperature of the kiln to room temperature after each casting process, resulting in excellent work efficiency. The present invention was completed with the aim of providing a dental investment material that can easily provide a dental investment material mold that can be used as a dental investment material, and a dental investment material mold formed using this dental investment material.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明は、焼石膏、クリストバライト、石
英の各粉状物を主成分としてこれに通気度増大用成分を
添加したことを特徴とする歯科用埋没材を第１の発明と
し、焼石膏、クリストバライト、石英の各粉状物を主成
分としてこれに通気度増大用成分を添加した歯科用埋没
材よりなり、通気度が０．０４ｃｍ／分以上であること
を特徴とする歯科用埋没材鋳型を第２の発明とするもの
である。[Means for Solving the Problems] The present invention, which has been made to solve the above-mentioned problems, consists of powdered materials of calcined gypsum, cristobalite, and quartz as main components, to which a component for increasing air permeability is added. The first invention is a dental investment material characterized by a dental investment material containing powdered materials of calcined gypsum, cristobalite, and quartz as the main components, to which an ingredient for increasing air permeability is added, and has an air permeability of 0. A second invention provides a dental investment mold characterized in that the speed is .04 cm/min or more.
【０００６】本発明において主成分となる焼石膏、クリ
ストバライト、石英のうち焼石膏はバインダーとして用
いられ、クリストバライト、石英は耐火材料としてもち
いられるものであるが、バインダーとしての焼石膏に耐
火材料としてクリストバライトと石英を共に添加するこ
とによって初めて焼成時における熱膨脹が有効に分散さ
れるもので、これにより従来できなかった急加熱が可能
となる。なお、耐火材料であるクリストバライトおよび
石英はいずれも平均粒径が５〜１５μ程度の紛状物とし
て前記バインダーである焼石膏との混合が均一かつ容易
に行えるよう調整されている。また、焼石膏、クリスト
バライト、石英の各粉状物はいずれも２０重量％以上配
合されるものであり、いずれかが２０重量％に満たない
場合には熱膨脹の十分な分散が行われ難く、急加熱した
場合にクラック、割れ、破壊等を発生させるおそれが生
じる。Among the main components of the present invention, calcined gypsum, cristobalite, and quartz, calcined gypsum is used as a binder, and cristobalite and quartz are used as fire-resistant materials. By adding both silica and quartz, the thermal expansion during firing can be effectively dispersed, and this makes it possible to heat rapidly, which was previously impossible. The refractory materials cristobalite and quartz are both prepared in the form of powder with an average particle diameter of about 5 to 15 microns so that they can be mixed uniformly and easily with the binder, calcined gypsum. In addition, the powdered materials of calcined gypsum, cristobalite, and quartz are all blended in an amount of 20% by weight or more, and if the content of any of them is less than 20% by weight, sufficient dispersion of thermal expansion is difficult to take place, resulting in rapid When heated, there is a risk of cracking, splitting, destruction, etc.
【０００７】また、主成分である焼石膏、クリストバラ
イト、石英の各粉状物に添加される通気度増大用成分は
、急加熱した場合の焼成時における未反応または遊離し
てくる水分の蒸発に伴う水蒸気圧力を有効に透過させる
よう鋳型に十分な通気度を付与するためのもので、これ
により急加熱した場合に前記水蒸気圧力によるクラック
、割れ、破壊等の発生はさらに有効に防止される。通気
度増大用成分としてはアクリル酸カルシウム、硫酸カリ
ウム、塩化ナトリウム等の無機塩類あるいは熔融石英粉
末、ムライト粉末、アルミナ粉末等の耐火材料粉末から
選ばれた１種または２種以上のものが用いられ、前記主
成分に対して例えば１０重量％程度以下の割合で添加さ
れる。また、通気度増大用成分として耐火材料粉末を用
いる場合には、クリストバライトおよび石英の平均粒径
よりも大きな例えば２０〜３０μ程度の平均粒径のもの
を用いることが好ましい。[0007] In addition, the air permeability increasing components added to the powdered materials of calcined gypsum, cristobalite, and quartz, which are the main components, help evaporate unreacted or liberated water during firing when heated rapidly. This is to give the mold sufficient air permeability to effectively transmit the accompanying water vapor pressure, and this further effectively prevents the occurrence of cracks, cracks, destruction, etc. due to the water vapor pressure when rapidly heated. As the air permeability increasing component, one or more components selected from inorganic salts such as calcium acrylate, potassium sulfate, and sodium chloride, and refractory material powders such as fused quartz powder, mullite powder, and alumina powder are used. , is added in a proportion of, for example, about 10% by weight or less based on the main component. Further, when using a refractory material powder as the air permeability increasing component, it is preferable to use powder with an average particle size of about 20 to 30 microns, which is larger than the average particle size of cristobalite and quartz.
【０００８】しかして、歯科用埋没材を用いて歯科用埋
没材鋳型を製造するには、例えば、歯科用埋没材１００
重量部に対して水２０〜４０重量部を添加して十分に混
練し、これによりワックス歯型を埋没して得られるもの
であり、また、このようにして成形された歯科用埋没材
鋳型は脱ロウ処理により形成された中空部に鋳造用合金
材料を注入してクラウン、ブリッジ等の所定の鋳造品を
得ることは従来のものと変わることはないが、本発明で
の歯科用埋没材鋳型は、焼成時において焼成開始温度を
いきなり３５０ ℃以上として指定焼成温度である例え
ば７００ ℃まで急速に昇温してもクラック、割れ、破
壊等の発生がない。その理由は歯科用埋没材がバインダ
ーとしての焼石膏に加えて耐火材料としてのクリストバ
ライトおよび石英の両方を合わせ配合して主成分として
あるので、焼成時における熱膨張を有効に分散させるこ
とができ、更には、通気度増大用成分も添加されている
ので水分の蒸発に伴う水蒸気圧力を有効に透過させるこ
とができ、従って、例えば図１に示されるように焼成開
始温度をいきなり３５０ ℃（折線Ａで図示）として焼
成を行って折線Ｂで図示したように焼成開始温度を５０
０ ℃とすることも、更には直線Ｃで図示したように焼
成開始温度を７００ ℃としてよく、従来の常温から焼
成を開始する曲線Ｓに比べて飛躍的に焼成時間の短縮化
を実現できることとなる。[0008] Therefore, in order to manufacture a dental investment mold using a dental investment material, for example, a dental investment material 100
It is obtained by adding 20 to 40 parts by weight of water to the parts by weight, thoroughly kneading the mixture, and embedding a wax tooth mold therein, and the dental investment material mold formed in this way is Injecting a casting alloy material into the hollow part formed by the dewaxing process to obtain a predetermined cast product such as a crown or bridge is the same as in the conventional method, but the dental investment mold of the present invention During firing, even if the firing start temperature is suddenly set to 350°C or higher and the temperature is rapidly raised to the designated firing temperature, for example, 700°C, no cracks, splits, or destruction occur. The reason for this is that dental investment materials are mainly composed of calcined gypsum as a binder and cristobalite and quartz as fire-resistant materials, so they can effectively disperse thermal expansion during firing. Furthermore, since a component for increasing air permeability is also added, it is possible to effectively transmit the water vapor pressure caused by the evaporation of water. Therefore, for example, as shown in FIG. ), and the firing start temperature was set at 50°C as shown by broken line B.
It is also possible to set the firing temperature to 0 °C, or even to 700 °C as shown by straight line C, and it is possible to dramatically shorten the firing time compared to the conventional curve S in which firing starts from room temperature. Become.
【０００９】以上のようにして得られた歯科用埋没材鋳
型は、通気度が０．０４ｃｍ／分以上であって焼成工程
における水蒸気圧力を有効に透過することができ、焼成
後においてもクラック、割れ、破壊等の発生がなく、し
かも、鋳型の表面性状も極めて滑沢で優れたものである
。なお、前記の通気度はテストピースを載置した通気台
の両端に差圧計と水を貯めた容器とを連通させ、該容器
からの単位時間当たりの排出水量と差圧から次式、通気
度（ｃｍ／分）＝〔排出水量（ｃｍ３ ）×テストピー
ス高さ（ｃｍ）〕／〔テストピース断面積（ｃｍ２ ）
×差圧（ｃｍ）×時間（分）〕によって計算されるもの
である。The dental investment mold obtained as described above has an air permeability of 0.04 cm/min or more and can effectively transmit water vapor pressure during the firing process, and even after firing, there are no cracks or There is no occurrence of cracking or destruction, and the surface quality of the mold is extremely smooth and excellent. The above air permeability can be calculated by connecting a differential pressure gauge with a container containing water at both ends of the ventilation table on which the test piece is placed, and using the amount of water discharged from the container per unit time and the differential pressure, the air permeability can be calculated using the following formula: (cm/min) = [Discharged water volume (cm3) x Test piece height (cm)] / [Test piece cross-sectional area (cm2)
x differential pressure (cm) x time (minutes)].
【００１０】0010
【実施例】表１に示されるように、焼石膏、クリストバ
ライト、石英を主成分とした基本配合の歯科用埋没材１
００重量部に対して、通気度増大用成分５重量部を添加
して混水量を３３％とした混練物に、ワックス歯型を埋
没して歯科用埋没材鋳型を成形した。その後、この歯科
用埋没材鋳型を焼成開始温度を５００ ℃として７００
℃まで急加熱し、ワックス歯型が流出して形成された
中空部内に鋳造用合金材料を注入して所定の鋳造品を得
た。得られた歯科用埋没材鋳型にはいずれもクラック、
割れ、破壊等がなく、しかも、型の表面性状も極めて滑
沢で優れたものであり、品質の高い鋳造品を成形するこ
とができた。[Example] As shown in Table 1, dental investment material 1 with the basic composition of calcined gypsum, cristobalite, and quartz as main components.
A dental investment material mold was formed by embedding a wax tooth pattern in a kneaded material containing 5 parts by weight of an air permeability increasing component to 00 parts by weight to make the water content 33%. Thereafter, this dental investment mold was heated to 700°C with a firing starting temperature of 500°C.
It was rapidly heated to ℃, and a casting alloy material was injected into the hollow space formed by the wax tooth pattern flowing out, thereby obtaining a predetermined cast product. All of the dental investment molds obtained had cracks,
There were no cracks or breaks, and the surface of the mold was extremely smooth and excellent, making it possible to mold a high-quality cast product.
【表１】[Table 1]
【００１１】[0011]
【発明の効果】以上の説明からも明らかなように、第１
の発明においては、急加熱による昇温を行ってもクラッ
ク、割れ、破壊等の発生がない歯科用埋没材鋳型を常法
により簡単に成形できるものであり、また、第２の発明
は急加熱による昇温を行ってもクラック、割れ、破壊等
の発生がないので、急速に焼成することができて鋳造時
間の大巾な短縮ができるとともに急を要する場合にも即
座に対応でき、また、焼成開始温度が高温であるため一
回の鋳造処理毎に焼成炉を常温まで降温する必要もなく
て作業効率を高めるとともに省エネルギー上の効果もあ
り、また、第２の発明の歯科用埋没材鋳型による鋳造品
はクラック、割れ、破壊等の発生がないので表面性状が
滑沢で品質の優れたものとなるなど多くの利点がある。
よって、本発明は従来の問題点を一掃した歯科用埋没材
および歯科用埋没材鋳型として産業の発展に寄与すると
ころは極めて大である。[Effect of the invention] As is clear from the above explanation, the first
In the second invention, it is possible to easily mold a dental investment mold by a conventional method that does not cause cracks, cracks, destruction, etc. even when the temperature is increased by rapid heating. Since there are no cracks, cracks, or destruction even when the temperature is raised by Since the firing start temperature is high, there is no need to lower the temperature of the firing furnace to room temperature after each casting process, which increases work efficiency and has the effect of saving energy.Furthermore, the dental investment mold of the second invention Cast products produced by this method have many advantages, such as no cracking, splitting, or destruction, resulting in a smooth surface and superior quality. Therefore, the present invention greatly contributes to the development of industry as a dental investment material and a dental investment material mold that have eliminated the problems of the conventional art.
【図１】焼成工程における昇温カーブを示すグラフであ
る。FIG. 1 is a graph showing a temperature increase curve in a firing process.
Claims (5)
粉状物を主成分としてこれに通気度増大用成分を添加し
たことを特徴とする歯科用埋没材。1. A dental investment material comprising powdered materials of calcined gypsum, cristobalite, and quartz as main components, to which an ingredient for increasing air permeability is added.
粉状物がいずれも２０重量％以上配合されている請求項
１に記載の歯科用埋没材。2. The dental investment material according to claim 1, wherein each powder of calcined gypsum, cristobalite, and quartz is blended in an amount of 20% by weight or more.
ウム、硫酸カリウム、塩化ナトリウム等の無機塩類ある
いは熔融石英粉末、ムライト粉末、アルミナ粉末等の耐
火材料粉末から選ばれた１種または２種以上のものであ
る請求項１または請求項２に記載の歯科用埋没材。3. The air permeability increasing component is one or more selected from inorganic salts such as calcium acrylate, potassium sulfate, and sodium chloride, and refractory material powders such as fused quartz powder, mullite powder, and alumina powder. The dental investment material according to claim 1 or 2, which is a dental investment material.
ライトおよび石英の平均粒径よりも大きい請求項３に記
載の歯科用埋没材。4. The dental investment material according to claim 3, wherein the average particle size of the refractory material powder is larger than the average particle size of cristobalite and quartz.
粉状物を主成分としてこれに通気度増大用成分を添加し
た歯科用埋没材よりなり、通気度が０．０４ｃｍ／分以
上であることを特徴とする歯科用埋没材鋳型。5. A dental investment material consisting of powdered materials of calcined gypsum, cristobalite, and quartz as the main components and an ingredient for increasing air permeability added thereto, and having an air permeability of 0.04 cm/min or more. Characteristic dental investment mold.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3128447A JPH07103006B2 (en) | 1991-04-30 | 1991-04-30 | Dental investment material and dental investment mold |
| US07/866,901 US5373891A (en) | 1991-04-30 | 1992-04-06 | Investment material and mold for dental use and burnout thereof |
| DE69212059T DE69212059T2 (en) | 1991-04-30 | 1992-04-14 | Dental investment and casting mold and method for firing the same |
| EP92106431A EP0511546B1 (en) | 1991-04-30 | 1992-04-14 | Investment material and mold for dental use and burnout thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3128447A JPH07103006B2 (en) | 1991-04-30 | 1991-04-30 | Dental investment material and dental investment mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04330006A true JPH04330006A (en) | 1992-11-18 |
| JPH07103006B2 JPH07103006B2 (en) | 1995-11-08 |
Family
ID=14984946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3128447A Expired - Fee Related JPH07103006B2 (en) | 1991-04-30 | 1991-04-30 | Dental investment material and dental investment mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07103006B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040020621A (en) * | 2002-08-31 | 2004-03-09 | 김경남 | Gypsum-bonded investment using alpha type gypsum |
| KR100864717B1 (en) * | 2007-04-18 | 2008-10-23 | 주식회사 삼우 | Gypsum type investment agent for investment casting |
| WO2013161643A1 (en) * | 2012-04-27 | 2013-10-31 | 吉野石膏株式会社 | Gypsum-based embedding material composition for casting |
| US9718121B2 (en) | 2012-06-18 | 2017-08-01 | Yoshino Gypsum Co., Ltd. | Casting investment composition and casting process using same |
| EP3693099A4 (en) * | 2017-10-05 | 2021-02-17 | Yoshino Gypsum Co., Ltd. | Gypsum-based investment material composition for casting, and method for manufacturing gypsum-based investment material composition for casting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954653A (en) * | 1982-08-13 | 1984-03-29 | 而至歯科工業株式会社 | Gypsum composition for laying false tooth |
| JPS61193741A (en) * | 1985-02-22 | 1986-08-28 | Haidentaru Service Kk | Investment casting material for dental purpose |
| JPS63141906A (en) * | 1986-12-03 | 1988-06-14 | G C Dental Ind Corp | Embedding material for dental molding |
| JPH02223505A (en) * | 1988-11-24 | 1990-09-05 | Jishi Toushi Kogyo Kk | Gypsum composition for dental use |
-
1991
- 1991-04-30 JP JP3128447A patent/JPH07103006B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5954653A (en) * | 1982-08-13 | 1984-03-29 | 而至歯科工業株式会社 | Gypsum composition for laying false tooth |
| JPS61193741A (en) * | 1985-02-22 | 1986-08-28 | Haidentaru Service Kk | Investment casting material for dental purpose |
| JPS63141906A (en) * | 1986-12-03 | 1988-06-14 | G C Dental Ind Corp | Embedding material for dental molding |
| JPH02223505A (en) * | 1988-11-24 | 1990-09-05 | Jishi Toushi Kogyo Kk | Gypsum composition for dental use |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040020621A (en) * | 2002-08-31 | 2004-03-09 | 김경남 | Gypsum-bonded investment using alpha type gypsum |
| KR100864717B1 (en) * | 2007-04-18 | 2008-10-23 | 주식회사 삼우 | Gypsum type investment agent for investment casting |
| WO2013161643A1 (en) * | 2012-04-27 | 2013-10-31 | 吉野石膏株式会社 | Gypsum-based embedding material composition for casting |
| JPWO2013161643A1 (en) * | 2012-04-27 | 2015-12-24 | 吉野石膏株式会社 | Investment composition for gypsum casting |
| US9834480B2 (en) | 2012-04-27 | 2017-12-05 | Yoshino Gypsum Co., Ltd. | Gypsum-based embedding material composition for casting |
| US9718121B2 (en) | 2012-06-18 | 2017-08-01 | Yoshino Gypsum Co., Ltd. | Casting investment composition and casting process using same |
| EP3693099A4 (en) * | 2017-10-05 | 2021-02-17 | Yoshino Gypsum Co., Ltd. | Gypsum-based investment material composition for casting, and method for manufacturing gypsum-based investment material composition for casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07103006B2 (en) | 1995-11-08 |
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