JPS6167733A - Dental alloy powder for kneading and filling material - Google Patents

Abstract

PURPOSE:To obtain a kneading and filling material for dental purpose free from toxicity and having excellent color fastness by using Pd-base alloy powder contg. a specified percentage of Pd, Ag, Au, In, Zn, and Cu as the alloy powder for kneading and filling in dental use, which is to be blended and kneaded with a liquid alloy mainly composed of Ga. CONSTITUTION:Pd-base alloy powder consisting of 0-70% Ag, 0-35% Au, 0-10% In, 0-5% Zn, 0-25% Cu and the balance Pd is used as the alloy powder for dental kneading and filling use, which is to be blended and kneaded with a liquid alloy mainly composed of Ga. The kneaded material of this Pd- base alloy powder nearly meets JIS requirements in its physical and technological properties.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an alloy powder for dental filling that is mixed and kneaded with a Ga-based alloy.

[Conventional technology]

Amalgam, which is a mixture of mercury and silver alloy powder, has been used as a dental filling material for many years. That is, the amalgam obtained by mixing and kneading a predetermined amount of mercury, which is a liquid metal, and a silver thread alloy powder with one predetermined composition, is filled into the cavity of a patient's tooth, and after filling, the alloying reaction progresses. 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.

[Problem that the invention seeks to solve]

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.

[Means for solving problems]

Au: O~35%, In: O~10%, Zn: 0
5% Cu, 0 to 25% Ag, 0 to 70% Ag, and the balance Pd.

〔Example〕

First embodiment Pd3. An alloy powder having a composition of O% + 60% Ag, 15% Cu, 2% Zn, and 3% In was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated.

For a given amount of this alloy powder, use an amalgam mixer to
A kneaded product obtained by determining the amount of liquid gallium alloy that will yield a kneaded product with approximately the same plasticity as a conventional amalgam-based kneaded product when mechanically kneaded for 0 seconds, and mixing these. - Scientific and engineering properties such as Diamethosil tensile strength 2 dimensional change and creep were measured in accordance with the test method of T-5T6109. When the measurement results were compared with the above JIS standard values, all of them were almost satisfied.

The color fastness test was carried out in accordance with the regulations of RIsT6], 08, and the results also met the standards.

Note that various types of liquid gallium are possible, such as 92Ga-88n, 75.50a-24,5In
Alternatively, there are 62Ga-138n-25In and the like.

Second Example Pd 24%, Ag 58%, A+r 5%, Cu 1. An alloy powder having a composition of 3% Ol and Zn was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated to prepare the powder. Similar to the first embodiment described above, when a predetermined amount of this alloy powder is mechanically kneaded in an amalgam mixer for about 10 seconds, a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product is obtained. The amount of liquid gallium alloy is determined, and the kneaded product obtained by mixing these is JI
Scientific and engineering properties such as Diametsil tensile strength, two dimensional changes, and creep were measured in accordance with the ST6109 test method. When these measurement results were compared with the above JIS standard values, all values were found to almost satisfy these values.

Further, a color fastness test was carried out in accordance with the provisions of JIST6]08, and results satisfying the standards were also obtained.

Third implementation 11 Pd 20%, Ag 50%, Au] ]2
%, Cu ] 66% and Zn 2% was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated to prepare the powder. Similar to the first embodiment described above, when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product is obtained. The amount of liquid gallium alloy was determined, and the kneaded product obtained by mixing these was measured for scientific and engineering characteristics such as Diametsil tensile strength 2 dimensional change and creep in accordance with the test method of JIST 6109. . When the measurement results were compared with the TIS standard values mentioned above, all these values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST 6108, and results satisfying the standards were also obtained.

Fourth Example PD 15%, Ag 48%, Au 25%,
Cu 8%.

An alloy powder having a composition of 2% Zn was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated. Similar to the first embodiment described above, when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product is obtained. For the kneaded product obtained by determining the amount of liquid gallium alloy and mixing them,
Scientific and engineering characteristics such as Diamethosyl tensile strength 1 dimensional change and creep were measured in accordance with the JIST 6109 test method. When these measurement results were compared with the JIS standard values mentioned above, all of these values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST 61.08, and results that also satisfied the standards were obtained.

Fifth Example Pd], 5%, Au 35%, Ag 40
%, Cu 8%, and Zn 1% was produced by an atomizing method, sieved through a predetermined sieve, and then heat-treated. Similar to the first embodiment described above, when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product is obtained. The amount of liquid gallium alloy was determined, and the kneaded product obtained by mixing these was tested for scientific and engineering properties such as Diamethosyl tensile strength 1 dimensional change and creep in accordance with the test method of J Engineering 5T6109. It was measured. When this measurement result was compared with the above JIS standard values, all of the values were almost satisfied.

In addition, the color fastness test was carried out in accordance with the provisions of JIS', r6]08, and results satisfying the standards were also obtained.

Moreover, the color fastness is also good.

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

Therefore, it is extremely effective as an alloy powder for dental filling which is mixed and kneaded with a liquid low melting point metal mainly composed of gallium.

Claims (1)

[Claims] 1. Ag0-70%, Au0-3
5%, In0-10%, Zn0-5%, Cu0-25%
An alloy powder for dental filling, characterized in that the remainder is Pd.