Palladium-silver alloy material for dental department

A palladium-silver alloy and alloy material technology, applied in dentistry, dental preparations, dental prostheses, etc., can solve the problems of aesthetic and physical performance reduction, tissue biostimulation, and cost increase, achieving obvious price advantages and improving yield strength , The effect of reducing the expansion coefficient of the alloy

Inactive Publication Date: 2015-06-17
SICHUAN QIHE PRECIOUS METALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion of dental alloys can lead to loss of aesthetic and physical properties, biostimulation of tissues, and even public panic
In order to improve the corrosion resistance and ductility of palladium-silver alloys, a certain amount of gold is usually added to palladium-silver alloys, but the addition of gold will increase the cost, thus limiting its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A dental palladium-silver alloy material, the alloy contains the following main components by weight percentage: palladium (Pd) 57.6%, silver (Ag) 28.1%, and the balance is other alloy elements, specifically indium, gold, platinum, At least one of gallium, zinc, tin, copper, antimony, carbon, germanium, zirconium, silicon, selenium, iron, magnesium, aluminum, cobalt, titanium, iridium, rhodium and other elements. In this embodiment, 11.4% indium and 2.9% gallium are used as a demonstration.

[0033] Batching is carried out according to the above weight composition ratio; the prepared raw materials are put into the melting furnace for smelting; the smelted metal molten liquid is poured into the mold to make the blank; respectively under the protection of nitrogen and nitrogen-hydrogen mixed gas Perform annealing treatment on the preform; roll the annealed preform into a cube or cuboid sample of about 1 g.

[0034] The obtained sample has a liquidus temperature of 1240°C, ...

Embodiment 2

[0039] A dental palladium-silver alloy material, the alloy contains the following components by weight percentage: palladium (Pd) 58.4%, silver (Ag) 27.1%, and other alloy elements in the balance.

[0040] Dosing ingredients according to the above weight composition ratio; put the prepared raw materials into the melting furnace for smelting; pour the smelted metal melt into the mold to make the green body; anneal the green body under the protection of nitrogen-hydrogen mixed gas ; Roll the annealed blank into a cube or cuboid sample of about 1 g.

[0041] The obtained sample has a liquidus temperature of 1260°C, a yield strength of 511MPa, a Vickers hardness of 338HV, a metal-ceramic bonding strength of 41.0 MPa, an elastic modulus of 106.5 MPa, and a thermal expansion coefficient of 14.8 (10 -6 / K), the elongation rate is 4%, and the obtained samples are used to make porcelain restorations without anti-silver sulfur treatment, and the product color is beautiful without discol...

Embodiment 3

[0043] A dental palladium-silver alloy material, the alloy contains the following components by weight percentage: palladium (Pd) 55.7%, silver (Ag) 28.6%, gold (Au) 1.3%, and the balance is other alloy elements.

[0044] Dosing ingredients according to the above weight composition ratio; put the prepared raw materials into the melting furnace for smelting; pour the smelted metal melt into the mold to make the green body; anneal the green body under the protection of nitrogen-hydrogen mixed gas ; Roll the annealed blank into a cube or cuboid sample of about 1 g.

[0045] The obtained sample has a liquidus temperature of 1210°C, a yield strength of 501 MPa, a Vickers hardness of 334HV, a metal-ceramic bonding strength of 41.1 MPa, an elastic modulus of 106.4 MPa, and a thermal expansion coefficient of 14.6 (10 -6 / K), the elongation rate was 4.7%, and the obtained samples were used to make porcelain restorations without anti-silver vulcanization treatment, and the product had a...

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Abstract

The invention discloses palladium-silver alloy for repairing an oral cavity. Alloy ingredients are optimized by an alloy material. Compared with the prior art, the obtained material has the advantages of good mechanical property, good corrosion resistance, low sensitization, and beautiful color and luster under the premise of not reducing the alloy property and clinical use effect; and the cost is just 1 / 4 to 1 / 3 of gold alloy.

Description

technical field [0001] The invention belongs to the field of dental restorative materials, and relates to a palladium-silver alloy, in particular to a casting alloy used for making porcelain tooth restorations or metal restorations. Background technique [0002] Since the investment casting technology was introduced into the dental restoration process at the beginning of the 20th century, the application of alloy materials in the field of dental restoration has become more and more extensive, and it is still the most widely used material in dental restoration so far. Dental casting alloys can be divided into high noble metal casting alloys, semi-precious metal casting alloys, low precious metal casting alloys and non-precious metal casting alloys according to their precious metal content. Those with a precious metal content of more than 85% are classified as precious metal alloys, semi-precious metals with a precious metal content of 60% to 85%, low precious metal casting al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C5/04A61K6/04
Inventor 赵伟
Owner SICHUAN QIHE PRECIOUS METALS CO LTD
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