JPS6167731A - 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 Au-base alloy powder contg. a specified percentage of Au, Pd, Zn, In, Pt, Ag, 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:Au-base alloy powder consisting of 0-20% Pd, 0-5% Zn, 0-10% In, 0-10% Pt, 0-40% Ag, 0-30% Cu and the balance Au 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 Au-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 silver thread alloy powder with two predetermined compositions 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]

Pd 0-20%, Zn 0-5%, In 0-10%
, PtO-10%, Ag0-40%, C
It is characterized by mixing and kneading an Au-based alloy powder in which the balance after the u 0 to 30 coefficient is Au, with a liquid low melting point metal mainly composed of Ga.

〔Example〕

First example Au 35% lAg 40%, Pd 15%, CI+8%.

An alloy powder having a composition of 2% and 2% Zn was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated. The first embodiment is such that when a predetermined amount of the alloy powder is mechanically kneaded in an amalgam mixer for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. A similar amount of liquid gallium alloy was determined, and the kneaded product obtained by mixing these was subjected to scientific and engineering properties such as Diamethosil tensile strength9 dimensional change and creep, in accordance with the test method of JTST6]09. was measured. When this measurement result was compared with the above JIS standard values, all of the values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST Cu08, and results that also satisfied the standards were obtained.

2nd Example Au 45 parts + Ag2O, 5 parts, pt 1%, Pd
An alloy powder having a composition of 5% Cu, 22.5% Cu, 22.5% Zn], and 5% In 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. Determine the amount of liquid gallium alloy,
Regarding the kneaded product obtained by mixing these, JIST6
] Diamethosyl tensile strength 1 according to the test method of 09
Scientific and engineering properties such as dimensional change and creep were 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 conducted using JIST Cu. The test was carried out in accordance with the regulations of 2008, and the results also met the standards.

Third Example Au 58%, Ag 32%, pa 8%, Z
An alloy powder having a component composition of n1tI and In 1% 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 tested for scientific and engineering properties such as Diametsil tensile strength 2 dimensional change and creep, in accordance with the test method of J■5TCu09. It was measured. This measurement result is shown above.
When compared with TIS standard values, all these values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST Cu0B, and results that also satisfied the standards were obtained.

Fourth Example A, U 70%, Ag 6%, Pt 5%
, Pd4%, Cu13% and Zn]%
An alloy powder having the following composition was produced by an atomizing 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 gallium alloy similar to that in the first example above was determined so that a kneaded product having almost the same plasticity as a conventional amalgam-based kneaded product when mechanically kneaded for 0 seconds was determined, and these were mixed. JISTCu0 for the kneaded product obtained by
Scientific and engineering characteristics such as Diamethosyl tensile strength, dimensional change, and creep were measured in accordance with the test method of 1.g.

When this measurement result was compared with the above JIS standard values, all of the values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST Cu08, and results that also satisfied the standards were obtained.

Fifth Example Au 75%, Ag 4%, Pt 10%
, Cu 9%, and Zn 2% alloy powder was produced by an atomization method, sifted 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. Determine the amount of liquid gallium alloy and determine the diametral tensile strength of the kneaded product obtained by mixing these in accordance with the JIST Cu0g test method.

Scientific and engineering properties such as dimensional change and creep were measured. When this measurement result was compared with the above JIS standard values, all of the values were almost satisfied.

Further, a color fastness test was carried out in accordance with the regulations of JIST Cu08, and results that also satisfied the standards were obtained.

As explained above, the kneaded product using about 15% of the alloy powder according to the present invention has scientific and engineering properties that meet the JIS standards, and has good discoloration resistance.

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. Pd0-20%, Zn0-5 as an alloy powder for dental filling to be mixed and kneaded with a liquid alloy mainly composed of Ga.
%, In0-10%, Pt0-10%, Ag0-40%
, 0 to 30% Cu and the balance Au.