JPS60135549A - Dental metallic material - Google Patents

Abstract

PURPOSE:To obtain a nonpoisonous dental metallic material having a low m.p. by specifying the composition of an alloy consisting of In, Sn, Ga and Ba, Cd, Sb, Mg, Ca, Li, Bi or Pd or further contg. Ag, Al, Zn, Au or Cu. CONSTITUTION:This dental metallic material used after mixing and kneading with metallic powder is a quaternary or higher multicomponent alloy having <=15 deg.C m.p. and consisting of 1-45wt% In, 1-30wt% Sn, 0.05-25wt% one or more among Ba, Cd, Sb, Mg, Ca, Li, Bi and Pd combined optionally with one or more among Ag, Al, Zn, Au and Cu, and the balance Ga. The material has a great affinity for other metal, and the corrosion resistance and mechanical characteristics can be improved by adding various metals.

Description

[Detailed description of the invention] The present invention relates to dental metal materials.

Amalgam has traditionally been used as a dental metal material for filling dental cavities. This is liquid Hg
The metal powder is usually mixed with Ag+Sn, A,! 7 + Zn or A, 9
10S n +Zn etc. are used.

As mentioned above, since this amalgam uses 1 (I), its toxicity becomes a problem, and it turns into vapor even at room temperature, creating a toxic atmosphere, which has a negative impact on dentists, etc., and furthermore, it has a negative impact on dentists, etc., and patients whose teeth are constantly filled with It is believed that there are some negative effects on

However, because this amalgam is easy to use, it continues to be used despite concerns about toxicity. However, research on metals to replace Hg is also progressing. Already research has been carried out on Ga alone and binary alloys of Qa. Ga is non-toxic and has a melting point of about 30°C, which can be lowered to 17°C by adding In to lower the melting point, but it is still too high for use and does not have good workability, so it is not widely used. It has not yet been used.

The purpose of the present invention is to obtain a dental alloy material that is non-toxic and has a melting point of 15°C or less, which is made of a multi-component alloy of quaternary or higher elements containing Ga, has good affinity with other metals, and is compatible with various metals. The present invention will be described in detail below, which is characterized in that it is a dental metal material whose corrosion resistance and mechanical properties are improved by addition.

The present invention uses Ba, cd, and Sl in the three elements of Ga-In-8n.
, Sb1M1/, Ca, T, i, Bi, Pd or more are added in small amounts, and Ag, Al, and Zn depending on the case.

By creating a multi-component alloy containing one or more elements of Au and Cu, the metal has a melting point of 15° C. or lower.

Although the above-mentioned ternary alloy of Ga-In-8n is sufficient to solve the above-mentioned conventional drawbacks, according to the present invention, Qa
-Ga-In-8n has a slower diffusion rate than In-8n and is liquid at around room temperature.Ba, cd, S
i, sb, Ml.

When one or more of Ca, Li, Bi, and Pb are added, Q.
The original structure of the additive remains in a-In-8n, and G
a-In-Sn and Ba, Cd, Si, sb,
A state in which additives of one or more metals such as Mfl, Ca, Li, Bi, and Pd are mixed appears. In this state, if this mixed system is heated or left for a long time, the additive element will diffuse into Ga-In-8n to the solid solubility limit and form an alloy.

That is, by adding the above additive elements to Ga-In-8n, it is possible to obtain a metal whose structure changes over time.

Therefore, Ga 58W%, In 24w%, Sn
Antimony powder obtained by the Atoma-Izu manufacturing method was added to the base alloy with a concentration of 8W% to give a weight of 20% of the base alloy. When taken out after a period of time, it had solidified, and after cooling, the compressive strength was measured using a compression testing machine, and the compressive strength was approximately 1 to 2/, lI
It was crushed with

Next, Ga 68W%, In 24W%, 5n8W%
Ag66W% Sn25W% in the base alloy
Approximately 40 mesh of atomized powder of tZn9W% alloy was blended with the same weight as the base alloy and kneaded well.
When it was placed in a constant temperature bath at 0.degree. C. for 3 hours and then taken out and subjected to a compression test, the temperature was about 12K, resulting in compression deformation.

Furthermore, as a result of the experiment, In 1~45W%, Sn 1~
30W% contains Ba, Cd, Si, sb, Ml,
19. Additive element group of one or more elements of Ca, Li, Bi, Pd, and depending on the case, to the above additive element group. A, l, ZIT, Au, Cu is added in one or two or more elements, and the remaining part of 7j0.05~25w is Ga3
- By setting it as such, a dental metal having a melting point of 15°C or lower can be obtained.

The above-mentioned metals made of quaternary or higher multi-component alloys are used as dental materials by mixing them with metal powder when used, just like conventional HLf, but since this metal is an alloy, there is no conventional history. is All"+Sn.

AP + Z n Still A? While it was mixed with metal powders of two or more elements such as +Sn+Zn, these metal powders are heat-resistant. , Sn or Zn alone can be sufficiently used as a dental material.

Generally, the lower the melting point of a liquid at a certain temperature, the greater its free energy. Therefore, the present invention is applicable to Ga alone or Ga-
The diffusion rate for certain metals and alloys is increased compared to the In binary system.

In addition, by using a multi-component alloy of quaternary or higher elements, the present invention can lower surface tension, improve wettability to other metals, etc., and furthermore, because it is a multi-component alloy, diffusion to other metals or alloys is increased. can be done.

Therefore, when mixed with dental metal powder and filled and solidified, it can be used as a dental metal that is much better than Ga alone or a binary system of Ga-In for the above reasons.

According to the present invention, B is added to the Ga-In-8n ternary alloy.
a, Cd, Si, Sb, Ml, Ca, Li
A 9 +
By making it a multi-component alloy containing one or two or more of Zn, Au, and Cu, it has excellent wettability to tooth substance and other metals, and when used for filling tooth cavities, it Since there are no gaps between the materials and the material, and the melting point is low, the workability is extremely good during use.

In addition, it has no toxicity in biological reactions and is suitable as a dental metal, and is useful not only for cavity repair but also for denture repair and dental cast metal floor repair.

Patent applicant: Tokuriki Honten Co., Ltd. Agent Patent attorney Takashi Kanekura

Claims (1)

[Claims] 1 In a dental metal material used by mixing and kneading metal powder, In 1 to 45 W%, Sn 1 to 30 W% and B
a, ca, sb, M9. Ca, Li, Bi
, one or two or more elements of pa, and A, 9. depending on the case. A4゜A multi-element alloy of quaternary or higher elements with a melting point of 15°C or lower by adding 0.05 to 25 W% of Zn, Au, and Cu with one or more elements and the balance being Ga. dental metal materials.