JPS6167745A - Dental kneading and restoring metallic material - Google Patents

Abstract

PURPOSE:To develop the titled material having no toxicity, and superior in characteristics such as discoloration resistance, strength, size variation and creep, by using a Ga alloy having a specified compsn. as liquid metal, and Au, In, Zn, Cu, Ag and Pd as metal powder. CONSTITUTION:The alloy composed of 1-30% Sn, 1-45% In or Zn 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 together with said liquid alloy, the metal powder milled finely by atomizing method, and having composed compsn. of 0-35% Au, 0-10% In, 0-5% Zn, 0-25% Cu, 0-70% Ag and the balance Pd is used. The titled material having no amalgam toxicity, and superior in characteristics such as discoloration resistance, tensile strength, size variation and creep is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a dual-phase metallization optical loading system using a Ga-based liquid metal and a metal powder mixed and kneaded.

[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 compared to other double-layer alloys for casting, it has a semi-(II)
It has been used in its current size because of its good workability in terms of fi and handling.

[Problem that the invention seeks to solve]

However, since the conventional technology uses mercury,
Due to its toxicity, the problems of toxicity to patients and handlers and environmental pollution have become a top priority in society.

Therefore, G
a t''! Binary alloys such as monolithic or Ga-based eutectic alloys such as Ga-8n eutectic alloys, Ga-Inn eutectic alloys, and Ga-Zn eutectic alloys, or combinations thereof, are used, and the metal powder is Au, A lot of basic research has been carried out using powders of single metals such as Ag, Co, Sn, 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. ing. However, compared to mercury-based amalgam, various properties such as handling and utility for biphasic repair are still inadequate, and it has not been put into practical use.

[Failure to solve the problem]

The liquid metal contains 1 to 30% Sn, 1 to 45% tn and/or Zn, and the balance Ga, and the metal powder contains 0 to 35% Au, n θ to 10%, and 0 to 5 Zn.
%, Co 0-25%, Ag 0-70% and the balance P
The patent is for the Pd-based alloy powder designated as d.

〔Example〕

1st Example Liquid metal: Ga 63%, In 24%, 5n13
%, and as metal powder, Pd30%, Ag60%, C
U18% and Zn 2%.

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 adjusted so that when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam-based kneaded material for about 10 seconds, a kneaded product having approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. For the kneaded product obtained by mixing these, scientific and engineering properties such as diametral tensile strength, dimensional change, creep, etc. were measured in accordance with the test method of JTST6109.

The color fastness test was conducted in accordance with the specifications of JTST 6108.

The measurement results for Diamethodyl tensile strength, dimensional change, and creep were compared with the JIS standard values (1) and these grains were added.

Unfortunately, the results of the color fastness test also satisfied the knowledge according to JIST6108.

Second Example Liquid metal: Ga63%, In22%, Zn2%
, 5n13%, Pd24%, Au5 as metal powder.
%, Ag 57%, Cu 12% + Zn 2%.

The metal powder having the component composition 1 was produced by an atomization method, sieved through a predetermined sieve, and then heat-treated to prepare the powder. For a given amount of this alloy powder, about 10
The amount of liquid metal was determined so that a kneaded product having approximately 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 J■5T6109. Scientific and engineering characteristics such as diametral tensile strength, dimensional change, and creep were determined in accordance with the test method of

The color fastness test was conducted in accordance with JIST6108.

The measurement results of diametral tensile strength, dimensional change, and creep were compared with the above JIS rating values, and all of them satisfied these values.

The results of the discoloration test also satisfied the standards according to JIST6108.

Third Example Liquid metal: 80% Ga, 6% Zn, 14% 5N
As metal powder, Pd 15%, Au 25% + A
48% g, 0% Cll, 1% Zn, 1% In.

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 adjusted so that when a predetermined amount of this alloy powder is mechanically kneaded with an amalgam mixer for about 10 seconds, a kneaded product with approximately the same plasticity as a conventional amalgam-based kneaded product is obtained. The kneaded product obtained by mixing these was measured for scientific and engineering properties such as Diamethodyl tensile strength 9 dimensional change and creep in accordance with the test method of JIST6109.

The color fastness test was carried out in accordance with the provisions of JIST6]08.

The measurement results of diametral tensile strength 1 dimensional change and creep were compared with the JIS standard values listed in 1.

The results of the color fastness test also met the JIST6108 standard.

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

Claims (1)

[Claims] 1. As a liquid metal, Sn 1-30%, In and or Zn 1-45%, and the balance Ga, as metal powder Au 0-35%, In 0-10%, Zn 0-5%,
A dental metal filling material characterized by containing 0 to 25% Cu, 0 to 7% Ag, and the balance Pd.