JPS6167749A - Dental kneading and restoring metallic material - Google Patents

Abstract

PURPOSE:To develop the titled material superior in characteristics such as discoloration resistance, tensile strength, size variation and creep, and harmless, by using a Ga alloy having a specified compsn. as liquid metal, and an Au alloy as metal powder. CONSTITUTION:The alloy composed of 0.01-5% one or >=2 kinds among Ag, Pd, Au, Al, Cu, Zn and Ge, 1-45% In, 1-30% Sn and the balance Ga is used as liquid metal of substitute for Hg in conventional Hg amalgam as the titled material. As metal powder used simultaneously with this, the Au alloy powder milled finely by atomizing method, and composed of 0.01-5% one or >=2 kinds of the same metal used for manufacturing said liquid metal among Ag, Pd, Au, Al, Cu, Zn, Ge, 0-20% Pd, 0-5% Zn, 0-10% In, 0-10% Pt, 0-40% Ag, 0-30% Cu and the balance Au is used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a two-phase metal wrought filler that is used by mixing and kneading a Ga-based liquid metal and a metal powder.

[Conventional technology]

Amarcum, which is a mixture of mercury and silver alloy powder, has been used as a dental filling material for many years.1 In other words, it is a mixture of mercury, which is a liquid metal, and silver thread alloy powder, which has one predetermined composition. The amalgam obtained by mixing and kneading amalgam in a specified manner is filled into the cavity of the patient's tooth. After filling, the alloying reaction progresses and the amalgam hardens to withstand occlusion. It has been used at present because it is easier to work with in terms of preparation and handling than other dental alloys.

[Problem that the invention seeks to solve]

However, since the above-mentioned prior art 1 uses mercury,
Due to its harmfulness, problems of toxicity to patients and handlers and environmental pollution have been increasing socially.

Therefore, as a metal wire prestige filler for dental restorations that do not use mercury-based amalgam, Ga is used as a liquid metal to replace mercury.
Single substance or Ga-8n eutectic alloy mainly composed of Ga, G
Binary alloys such as a-I n eutectic alloy, Ga-Z n eutectic alloy, etc. A Ga-based alloy with a combination of Au + Ag + Cu and S is used as the metal powder.
A lot of basic research has been carried out using powders of single metals such as n-metal and Zn, or powders of alloys such as Au alloys and Ag alloys, targeting mixed materials made by combining these liquid metals and metal powders. . However, compared to mercurial amalgam, various properties such as handling and as a dental restoration 4'A are still insufficient, and it has not been put into practical use.

[Failure to solve the problem]

0.01 to 5% of one or more of Ag, Pd, At, Cu, Zn and Ge as liquid metal;
In 1~45%, Snl ~30% and the balance Ga, as a metal powder, Ag + p d l A71
Among Cu + Zn and Ge, 1 type or 2f weight of the same as selected in item 2, 0.01-5%, and Pd 0-20, Zn 0-5%, 100-10%, p
t.

It is characterized by an A, +1 alloy powder containing ~10% Ago, ~40% Cu, 0~30% Cu, and the balance Au.

Ag and Pd contained in liquid metal in metal powder.

The reason for adding the same metal selected from Au + AZ, Cu, Zn, and Ge is that by including the metal contained in the liquid metal in the metal powder, mutual alloying diffusion reaction occurs during kneading. can promote,
The curing of the mixed filament obtained by these combinations proceeds more effectively, and it is possible to have properties that can be used practically as a time-kneaded filler.

〔Example〕

1st Example Liquid metal: Ga62.95%, In24%, 5n
Section 13, Ag0.05%, Au35 as metal powder
%, Pd 15%, Zn 2%, Ag 40%, and CuS.

A metal powder having the following component composition was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated. For a given amount of this alloy powder, about 10
The amount of liquid metal was determined so that a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product when mechanically kneaded for seconds was determined, and the kneaded product obtained by mixing these was tested according to JIST 6109. Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the law, and values nearly satisfying all of these were obtained.

The results of the color fastness test also met the JIST6108 standard. The change in hardness over time is shown as 1 in FIG. 1A.

Second Example Liquid metal: Ga63%, In23%, 5n13%
, Pd 1%, Au 35% as metal powder, P
d20%, Zn1%, Ag34%, CulO%.

The metal powder having the component composition described in - was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated to prepare it. For a given amount of this alloy powder, about 10
The amount of liquid metal was determined so that a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product when mechanically kneaded for seconds was determined, and the kneaded product obtained by mixing these was tested according to JIST 6109. Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the law, and values nearly satisfying all of these were obtained.

Furthermore, the results of the color fastness test also satisfied the JIST6108 standard. The change in hardness over time is shown as 2 in FIG. 1A.

Third Example Liquid metal: Ga 63%, In 24%, 5n1
2%, Au1%, and as metal powder, Au60%, P
d3%, Zn 2L pt 3%, Ag 17'
%, Cu15.

The metal powder with the above component composition is manufactured by the atomization method,
After sieving through a predetermined sieve, the mixture was heat-treated and adjusted. The amount of liquid metal is determined so that when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. Regarding the kneaded product obtained by mixing J
Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the test method of IST6109, and values nearly satisfying all of these were obtained.

The results of the breaking and discoloration test also satisfied the JIST6108 standard. The change in hardness over time is shown as 3 in FIG. 1A.

Fourth Example Liquid metal: Ga 60%, In 25%, 5n
Section 14, Ag 0.8%, Ge 0.2%, metal powder A1 155%, Pd 9%, Zn 2%, In 1 section,
Ag was 30% and Ge was 3%.

The metal powder with the above component composition is manufactured by the atomization method,
After sieving through a predetermined sieve, the mixture was heat-treated and adjusted. The amount of liquid metal is determined so that when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. Regarding the kneaded product obtained by mixing J
Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the test method of IST6109, and values nearly satisfying all of these were obtained.

Furthermore, the results of the color fastness test also satisfied the JIST 61.08 standard. Regarding the change in hardness over time, see 4 in Figure 1A.
Shown as

Fifth Example Liquid metal: Ga62.5%, In25%, 5n
1%, Pd 1%, At 0.5%, and the metal powders were Au 33%, Pd 20%, Zn 1%, Ag3.
5, Cu was 10%, and Ht was 1%.

A metal powder having the following component composition was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated. For a given amount of this alloy powder, about 10
The amount of liquid metal was determined so as to obtain a kneaded product having almost the same plasticity as a conventional amalgam thread wire 111 when mechanically kneaded for seconds, and the kneaded product obtained by mixing these was tested according to JTST6109. Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the law, and values nearly satisfying all of these were obtained.

The color fastness test results also met the JIST6108 standard. The change in hardness over time is shown as 5 in FIG. 1B.

Sixth Example Liquid metal: Ga65%, In22%, 5n105
%, Au 2%, CuO, 5%, as metal powder,
Au45%, Pd5q6, Zn2%, Inl, Pt1
%, Ag23%, and Cn2O%.

The metal powder with the above composition is produced by the atomization method,
After sieving through a predetermined sieve, the mixture was heat-treated and adjusted. The amount of liquid metal is determined so that when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. Regarding the kneaded product obtained by mixing J
Scientific and mechanical properties such as diametral tensile strength, dimensional change, and creep were measured in accordance with the test method of IST6109, and values nearly satisfying all of these were obtained.

Furthermore, the results of the color fastness test also satisfied the JIST6108 standard. The change in hardness over time is shown as 6 in FIG. 1B.

Seventh Example Liquid metal: Ga60%, In28.5%, 5nl
O%, Azo, 5%, Zn 1%, as metal powder, Au 70%, Pd 1%, Zn 5%, PT 5%
, Ag6 candy, Cu13 candy, and A41 candy.

The metal powder having the following component composition was produced by the A] Mize method, sieved through a predetermined sieve, and then heat-treated. For a given amount of this alloy powder, use an amalgam mixer to
The amount of liquid metal was determined so that a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product was obtained when mechanically kneaded for 0 seconds, and the kneaded product obtained by mixing these was determined according to JIST6109. Scientific and mechanical properties such as Gui Vmetral tensile strength, dimensional change, and creep were measured in accordance with the test method, and values nearly satisfying all of these were obtained.

The results of the color fastness test also met the JIST6108 standard. The change in hardness over time is shown as 7 in FIG. 1B.

Eighth Example Liquid metal: Ga62.5%, In22%, 5n1
2%, Ag 2%, A40.5%, Ge1. %, and as metal powder, Au55%, Pd2%, Znl, Pt
3%, Ag 20 section, C1116 section, A41 section, Ge
I was appointed as the second person.

The metal powder with the above component composition is manufactured by the atomization method,
After sieving through a predetermined sieve, the mixture was heat-treated and adjusted. For a given shade of this alloy powder, the amount of liquid metal is determined so that when mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. Regarding the compound obtained by mixing J
Scientific and mechanical properties such as diametral tensile strength, dimensional change and creep were measured in accordance with the test method of IST6109, and values nearly satisfying all of these were obtained.

Furthermore, the results of the color fastness test also satisfied the JIST6108 standard.

The change in hardness over time is shown as 8 in FIG. 1B.

For comparison with the hardness change characteristics over time in the following two examples, a graph of the hardening and time change characteristics of the mercury-based amalgam-based kneaded filler is shown in FIG.

As is clear from comparing Figures 1 and 2, all of the examples in this example have reached the level of high-toned amalgam or a level close to it, and their hardness characteristics over time are similar to those of mercury-based amalgam. After 24 hours, the curing process was completed.

Therefore, the filling operation can be carried out in the same manner as conventional mercury-based amalgam.

As described above, according to the present invention, its scientific and engineering properties meet the JIS standards, its color fastness is good, and its hardening properties and hardness level are similar to those of mercury-based amalgam. Therefore, it can be used in the same way as before in actual filling operations and handling.

Furthermore, amalgam that uses mercury has no toxicity and there is no need to worry about environmental pollution.

[Brief explanation of drawings]

FIGS. 1A and 1B are graphs showing the change in hardness over time in each example of the present invention, and FIG. 2 is a graph showing the change in hardness over time in a conventional mercury-based amalgam.

Claims (1)

[Claims] 1. As liquid metals, Ag, Pd, Au, Al, Cu,
One or more of Zn and Ge from 0.01 to
5%, In 1-45%, Sn 1-30% and the balance Ga
and metal powders such as Ag, Pd, Au, Al, Cu,
0.01 to 5% of the same one or more selected above from Zn and Ge, further 0 to 20% of Pd, Z
n0-5%, In0-10%, Pt0-10%, Ag0
40% Cu, 0 to 30% Cu, and the balance Au.