JPH0253503B2 - - Google Patents
Info
- Publication number
- JPH0253503B2 JPH0253503B2 JP59187527A JP18752784A JPH0253503B2 JP H0253503 B2 JPH0253503 B2 JP H0253503B2 JP 59187527 A JP59187527 A JP 59187527A JP 18752784 A JP18752784 A JP 18752784A JP H0253503 B2 JPH0253503 B2 JP H0253503B2
- Authority
- JP
- Japan
- Prior art keywords
- less
- metal
- liquid metal
- metal alloy
- dental
- 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.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 18
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 238000004898 kneading Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 5
- 229910052738 indium Inorganic materials 0.000 claims description 3
- 229910001092 metal group alloy Inorganic materials 0.000 claims 3
- 229910000807 Ga alloy Inorganic materials 0.000 claims 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 7
- 229910000497 Amalgam Inorganic materials 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 239000006023 eutectic alloy Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 229910001316 Ag alloy Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- 229910000645 Hg alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- -1 Sn and Zn Chemical class 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003564 dental alloy Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Dental Preparations (AREA)
Description
〔産業上の利用分野〕
本発明は、Ga系液体金属と金属粉末とを混合
練和して用いる歯科用金属練成充填材に関する。
〔従来の技術〕
歯科用金属練成充填材としては永年にわたつて
水銀に銀合金粉末を混合練和するアマルガムが使
用されてきている。すなわち、液体金属である水
銀と所定の成分組成の銀系合金粉末の各々を所定
量混合練和して得たアマルガムを患者の歯の窩洞
部に充填するもので、充填後に合金化反応の進行
によつて硬化して咬合に耐えることができるよう
になるもので、鋳造用の他の歯科用合金に比べて
準備や取扱の点で作業性に優れるために現在まで
使用されてきた。
〔発明が解決しようとする問題点〕
しかし、上記の従来技術は水銀を用いているた
めに、その有害性から患者や取扱者に対する毒性
および環境汚染の問題が社会的に高まつてきた。
そこで、水銀系のアマルガムを用いない歯科修
復用の金属練成充填材として、水銀に代わる液体
金属としてGa単体またはGaを主体としたGa−
Sn共晶合金、Ga−In共晶合金、Ga−Zn共晶合金
等の二元合金あるいはそれ等の組み合わせによる
Ga系合金を用い、金属粉末には、Au、Ag、Cu、
SnおよびZn等の単一金属の粉末あるいはAu合金
やAg合金等の合金の粉末を用いてこれらの液体
金属と金属粉末の組み合わせによる混合練和物を
対象とした基礎的研究がなされている。しかしな
がら、水銀系のアマルガムに比べて取扱や歯科修
復材としての種々の特性が未だ不十分であり実用
化には到つていない。
〔問題点を解決する為の手段〕
本発明は、液体金属として、Sn1〜13.5wt%と
InまたはZn1〜45wt%および残をGaとし、
金属粉末として、Cu30wt%以下、In25wt%以
下、Zn15wt%以下およびPd25wt%以下からなる
群から選ばれた2種以上とSn35wt%以下および
残をAgとし、
上記金属粉末1に対して質量比で上記液体金属
を1.5以下の割合で組み合わせることを特徴とす
る。
ここで、液体金属は、Sn1〜13.5wt%とInまた
はZn1〜45wt%および残をGaの三元合金とする
ことにより、常温で液体状態を保つことができる
ことになる。
しかし、Sn1wt%未満、InもしくはZnが1wt%
未満あるいは45wt%を超えると常温で液体状態
が保ちにくい傾向になる。また、Snが13.5wt%
を超えると練和したときの硬化反応が遅滞する不
都合が生じる。
つぎに、金属粉末は、上記液体金属と練和して
得られる練和物が実用に供し得るような歯科理工
学的諸性質を有するものとするために、Agおよ
びSn35wt%以下の二元素の他にCu30wt%以下、
In25wt%以下、Zn15wt%以下、Pd25wt%以下の
内の2種以上の元素を加えた四元以上の合金とし
たが、これら四元以上の合金粉末はいずれも上記
の液体金属と所定の比率で組み合わせて練和する
ことにより、良好な練和硬化物が得られることに
なる。
しかしながら、Snが35wt%を越える場合には
練和物の硬化反応の遅滞が顕著になり、Cuは練
和物の機械強度を増すには都合が良いが、30wt
%を越えると硬化反応の遅滞が顕著になる。In、
Znは各々の上限の組成を越える場合には練和物
の脆性が増して機械的強度の低下をきたす。Pd
は練和物の硬化反応促進上は都合は良いが、その
上限の組成を越える場合には練和物の硬化の際の
寸法増加が大きくなる問題がある。
また、練和の際に組み合わせる液体金属と合金
粉末との比率を質量比で1:1.5以下としたのは
液体金属の比率が1.5を越える場合には練和物の
硬化反応の遅延が大きくなるという問題が生じる
ためである。
〔実施例〕
以下に本発明の実施例を第1表に示す。
[Industrial Field of Application] The present invention relates to a dental metal filling material that is used by mixing and kneading a Ga-based liquid metal and a metal powder. [Prior Art] Amalgam, which is a mixture of mercury and silver alloy powder, has been used as a dental metal filling material for many years. In other words, the amalgam obtained by mixing and kneading a predetermined amount of liquid metal mercury and silver-based alloy powder with a predetermined composition is filled into the cavity of a patient's tooth, and the alloying reaction progresses after filling. It hardens to withstand occlusion, and has been used until now because it is easier to prepare and handle than other dental alloys for casting. [Problems to be Solved by the Invention] However, since the above-mentioned conventional technology uses mercury, problems of toxicity to patients and handlers and environmental pollution have increased socially due to its toxicity. Therefore, as a metal wrought filling material for dental restorations that does not use mercury-based amalgam, Ga alone or Ga-based liquid metal can be used as an alternative to mercury.
By binary alloys such as Sn eutectic alloy, Ga-In eutectic alloy, Ga-Zn eutectic alloy, or a combination thereof.
A Ga-based alloy is used, and the metal powder includes Au, Ag, Cu,
Fundamental research has been carried out using powders of single metals such as Sn and Zn, or powders of alloys such as Au alloys and Ag alloys, targeting mixed kneaded products made by combining these liquid metals and metal powders. However, compared to mercury-based amalgam, it still has insufficient handling and various properties as a dental restorative material, and has not been put into practical use. [Means for solving the problems] The present invention uses 1 to 13.5 wt% Sn as a liquid metal.
In or Zn1 to 45wt% and the balance is Ga, and the metal powder is two or more selected from the group consisting of Cu30wt% or less, In25wt% or less, Zn15wt% or less, and Pd25wt% or less, Sn35wt% or less, and the balance Ag. , characterized in that the liquid metal is combined with the metal powder 1 at a mass ratio of 1.5 or less. Here, the liquid metal can be kept in a liquid state at room temperature by using a ternary alloy of 1 to 13.5 wt% Sn, 1 to 45 wt% In or Zn, and the balance Ga. However, Sn is less than 1wt%, In or Zn is 1wt%
If it is less than 45wt% or more than 45wt%, it tends to be difficult to maintain a liquid state at room temperature. Also, Sn is 13.5wt%
If it exceeds this amount, there will be an inconvenience that the curing reaction during kneading will be delayed. Next, the metal powder contains two elements of Ag and Sn of 35wt% or less in order to make the kneaded product obtained by kneading with the liquid metal have various dental science and engineering properties that can be put to practical use. In addition, Cu30wt% or less,
This is a quaternary or higher alloy containing two or more of the following elements: In25wt% or less, Zn15wt% or less, and Pd25wt% or less.All of these quaternary or higher alloy powders are mixed with the liquid metal in a predetermined ratio. By combining and kneading, a good kneaded and cured product can be obtained. However, when Sn exceeds 35wt%, the curing reaction of the kneaded product is significantly delayed, and Cu is convenient for increasing the mechanical strength of the kneaded product, but at 30wt%
%, the curing reaction will be significantly delayed. In,
When the composition of Zn exceeds each upper limit, the brittleness of the kneaded product increases and the mechanical strength decreases. Pd
Although this is convenient for accelerating the curing reaction of the kneaded product, if the upper limit of the composition is exceeded, there is a problem in that the size of the kneaded product increases greatly when it is cured. In addition, the ratio of the liquid metal and alloy powder to be combined during kneading was set to be less than 1:1.5 in mass ratio because if the ratio of liquid metal exceeds 1.5, the curing reaction of the kneaded product will be delayed. This is because the following problem arises. [Examples] Examples of the present invention are shown in Table 1 below.
【表】
上記各成分組成の金属粉末はアトマイズ法によ
り製造し、所定の篩にて篩別した後、200℃で1
時間熱処理して調整した。
この合金粉末に液体金属を加えてアマルガムミ
キサーで約10秒間機械練和した。
以上の練和物についてJIST6109のテスト法に
準拠してダイヤメトラル引張強度、寸法変化量お
よびクリープ等の理工学的諸特性を測定した。
また、耐変色性試験はJIST6108の規定に準拠
して行つた。
以上の結果および合金粉末と液体金属の配合量
は第2表に示した通りである。[Table] The metal powders with the above component compositions were manufactured by the atomization method, and after being sieved with a specified sieve, they were heated at 200℃ for 1
Adjusted by heat treatment. Liquid metal was added to this alloy powder and mechanically kneaded for about 10 seconds using an amalgam mixer. Various scientific and engineering properties such as diametral tensile strength, dimensional change, and creep were measured for the above kneaded product in accordance with the test method of JIST6109. Further, the color fastness test was conducted in accordance with the regulations of JIST6108. The above results and the blending amounts of alloy powder and liquid metal are shown in Table 2.
【表】
ダイヤメトラル引張強度、寸法変化量およびク
リープの上記測定結果はJIS規格値と照合したと
ころすべてこれ等をほぼ満足した。
また、耐変色性試験の結果もJIST6108による
規格を満足した。
〔発明の効果〕
以上詳細に説明した本発明によると、その理工
学的特性はJIS規格値をほぼ満しており、耐変色
性も良好である。
さらに、水銀系のアマルガムのような毒性は一
切なく、環境汚染の心配もない。[Table] The above measurement results of diametral tensile strength, dimensional change, and creep were compared with JIS standard values, and all of them almost satisfied these. In addition, the results of the color fastness test also satisfied the standards according to JIST6108. [Effects of the Invention] According to the present invention described in detail above, its scientific and engineering properties almost satisfy the JIS standard values, and its color fastness is also good. Furthermore, unlike mercury-based amalgam, it is not toxic at all and there is no need to worry about environmental pollution.
Claims (1)
て練成して用いる歯科用金属練成充填材におい
て、 液体金属合金を、Sn1〜13.5wt%と、Inまたは
Zn1〜45%wtおよび残をGaとする合金とし、 金属合金粉末を、Cu30wt%以下、In25wt%以
下、Zn15wt%以下およびPd25wt%以下からなる
群から選ばれた2種以上とSn35wt%以下および
残をAgとする合金とし、 上記金属合金粉末1に対して質量比で上記液体
金属合金を1.5以下の割合で組み合わせることを
特徴とする歯科用金属練成充填材。[Claims] 1. A dental metal wrought filling material used by kneading a combination of a liquid metal alloy and a metal alloy powder, the liquid metal alloy containing 1 to 13.5 wt% of Sn, and In or
An alloy containing 1 to 45%wt of Zn and the balance of Ga, and metal alloy powder is mixed with two or more selected from the group consisting of 30wt% or less of Cu, 25wt% or less of In, 15wt% or less of Zn, and 25wt% or less of Pd, and 35wt% or less of Sn and the remainder. A dental metal wrought filling material, characterized in that the above-mentioned liquid metal alloy is combined with the above-mentioned metal alloy powder 1 in a mass ratio of 1.5 or less.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59187527A JPS6167744A (en) | 1984-09-07 | 1984-09-07 | Dental kneading and restoring metallic material |
DE8585107631T DE3580075D1 (en) | 1984-09-07 | 1985-06-20 | GALLIUM ALLOY FOR DENTAL MATERIAL. |
US06/746,883 US4659384A (en) | 1984-09-07 | 1985-06-20 | Gallium alloy for dental restorations |
EP85107631A EP0173806B1 (en) | 1984-09-07 | 1985-06-20 | Gallium alloy for dental restorations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59187527A JPS6167744A (en) | 1984-09-07 | 1984-09-07 | Dental kneading and restoring metallic material |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62279282A Division JPS63153235A (en) | 1987-11-06 | 1987-11-06 | Dental metallic kneading filler |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6167744A JPS6167744A (en) | 1986-04-07 |
JPH0253503B2 true JPH0253503B2 (en) | 1990-11-16 |
Family
ID=16207641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59187527A Granted JPS6167744A (en) | 1984-09-07 | 1984-09-07 | Dental kneading and restoring metallic material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6167744A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH046132U (en) * | 1990-04-26 | 1992-01-21 | ||
JPH0561563U (en) * | 1991-08-15 | 1993-08-13 | 株式会社コガネイ | Cylinder tube and cylinder device using the same |
JPH07233802A (en) * | 1994-02-21 | 1995-09-05 | Ckd Corp | Cylinder |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5017092A (en) * | 1973-06-20 | 1975-02-22 | ||
JPS5060421A (en) * | 1973-09-29 | 1975-05-24 | ||
JPS59187530A (en) * | 1983-04-07 | 1984-10-24 | 凸版印刷株式会社 | Device for automatically pasting sample |
-
1984
- 1984-09-07 JP JP59187527A patent/JPS6167744A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5017092A (en) * | 1973-06-20 | 1975-02-22 | ||
JPS5060421A (en) * | 1973-09-29 | 1975-05-24 | ||
JPS59187530A (en) * | 1983-04-07 | 1984-10-24 | 凸版印刷株式会社 | Device for automatically pasting sample |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH046132U (en) * | 1990-04-26 | 1992-01-21 | ||
JPH0561563U (en) * | 1991-08-15 | 1993-08-13 | 株式会社コガネイ | Cylinder tube and cylinder device using the same |
JPH07233802A (en) * | 1994-02-21 | 1995-09-05 | Ckd Corp | Cylinder |
Also Published As
Publication number | Publication date |
---|---|
JPS6167744A (en) | 1986-04-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |