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Palladium-silver alloy material for dental department

A palladium-silver alloy and alloy material technology, which is used in dentistry, dental preparations, dental prostheses, etc., can solve the problems of reduced aesthetic properties and physical properties, tissue biostimulation, and increased cost, and achieves mechanical properties inhibition, grain refinement and other problems. Grain, improve the effect of color and luster

Inactive Publication Date: 2013-07-17
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

[0033] A dental palladium-silver alloy material, the alloy contains the following main components by weight percentage: palladium (Pd) 57.6%, silver (Ag) 28.1%, the balance is other alloying 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. This embodiment uses 11.4% indium and 2.9% gallium as an example.

[0034] Ingredients according to the above-mentioned weight composition ratio; put the prepared raw materials into the smelting furnace for smelting; pour the molten metal into the mold to obtain the preform; respectively under the protection of nitrogen and nitrogen and hydrogen gas Annealing the green billet; rolling the annealed green billet into a cube or cuboid sample of about 1 g.

[0035] The liquidus temperature of the obtained sample is 1240℃, the yield strength is 503 MPa, the Vickers hardn...

Embodiment 2

[0040] A dental palladium-silver alloy material, the alloy contains the following components by weight percentage: palladium (Pd) 58.4%, silver (Ag) 27.1%, and the balance is other alloy elements.

[0041] Ingredients are prepared according to the above-mentioned weight component distribution ratio; the prepared raw materials are put into the smelting furnace for smelting; the molten metal is poured into the mold to obtain the green body; the green body is annealed under the protection of the mixed gas of nitrogen and hydrogen ; Roll the annealed green billet into about 1g cube or cuboid sample.

[0042] The liquidus temperature of the obtained sample is 1260℃, the yield strength is 511MPa, the Vickers hardness is 338HV, the metal-ceramic bonding strength is 41.0 MPa, the elastic modulus is 106.5 MPa, and the thermal expansion coefficient is 14.8 (10 -6 / K), the elongation rate is 4%. The sample obtained is used to make porcelain restorations without the need for anti-silver-sulfur ...

Embodiment 3

[0044] 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 alloying elements.

[0045] Ingredients are prepared according to the above-mentioned weight component distribution ratio; the prepared raw materials are put into the smelting furnace for smelting; the molten metal is poured into the mold to obtain the green body; the green body is annealed under the protection of the mixed gas of nitrogen and hydrogen ; Roll the annealed green billet into about 1g cube or cuboid sample.

[0046] The liquidus temperature of the obtained sample is 1210℃, the yield strength is 501 MPa, the Vickers hardness is 334HV, the metal-ceramic bonding strength is 41.1MPa, the elastic modulus is 106.4 MPa, and the thermal expansion coefficient is 14.6 (10 -6 / K), the elongation rate is 4.7%. The sample obtained is used to make porcelain restorations without the need fo...

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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 Applications(China)
IPC IPC(8): C22C5/04A61K6/04
Inventor 赵伟
Owner SICHUAN QIHE PRECIOUS METALS CO LTD
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