Cobalt-chromium ceramic-metal alloy disc for engraving fixed dentures and preparation method thereof

Abstract

The invention relates to oral medical materials, in particular to a cobalt-chromium ceramic-metal alloy disc for engraving fixed dentures. The cobalt-chromium ceramic-metal alloy disc is prepared fromthe following raw materials in percentage by weight: 50%-65% of cobalt, 20%-35% of chromium, 3%-6% of molybdenum, 1%-3% of titanium, 5%-7% of tungsten, 0.08%-0.3% of lanthanum, 0.1%-0.5% of cerium, 0.09%-0.3% of yttrium and 0.06%-0.2% of strontium. The preparation method comprises the following steps that 1, after the tungsten is firstly melt in a high-frequency high-temperature furnace, the cobalt, the chromium and the molybdenum are added in sequence; 2, the metals are introduced into a vacuum smelting furnace after melting, and then the cerium, the lanthanum, the titanium, the yttrium andthe strontium are added for vacuum melting; 3, a smelted and molten metal solution is introduced into a rectangular parallelepiped mold, and is cooled after being formed in a vacuum; and 4, for a cooled alloy metal ingot, residues in an alloy are cut off and separated from the alloy by a material reducing method, the remaining materials are machined by wire cutting and lathe turning, and the cobalt-chromium ceramic-metal alloy disc with the diameter being 98mm and the thickness being 10mm-25mm is machined. Compared with existing products, the cobalt-chromium ceramic-metal alloy disc is high inengraving machining yield and stable in quality, and is suitable for promotion and use.

Description

technical field [0001] The invention relates to oral medical materials, in particular to a cobalt-chromium porcelain alloy disk for engraving and fixing dentures and a preparation method thereof. Background technique [0002] Alloy materials for dental restoration are used to make crowns and bridges for dental fixation and restoration. It is a medical biometallic material. Materials and products placed in the oral cavity for a long time and in direct contact with human tissues must have good biocompatibility with the human body. At the same time, the alloy materials used for dental restoration have extremely strict requirements on the effectiveness of the human body, because when people eat, the teeth are not only chewing food, but also often exposed to various acidic and alkaline substances, and are also in the environment of oral fluid for a long time. Alloy materials for repair must not only be non-toxic and harmless to the human body, but also have high corrosion resist...

AI Technical Summary

Problems solved by technology

[0004] Cobalt-chrome porcelain alloy powder uses the additive method to 3D print crowns and bridges. The printed crowns and crowns are only shaped and must be sintered at high temperature. After high-temperature sintering, the oxide layer of the crowns and crowns can only be cleaned by manual grinding. As a result, the thickness of the crown wall is uneven, and the uneven thickness of the crown wall can easily cause the porcelain teeth to crack and collapse. At the same time, high-temperature sintering will also cause the deformation of the crown and the crown bridge, resulting in uneven edges of the dentures worn by the patient. Close fit, leading to the entry of bacteria and food residues in the mouth, reducing the lifespan of the teeth and affecting the health of the human body

[0005] Now use the CAD / CAM tooth carving machine to make fixed dentures, and use the CAD / CAM tooth carving machine overall solution to make dentures with cobalt-chromium porcelain alloy discs for dental restoration. It has the advantages of simple operation, high precision, edge tightness, and speed Fast, low cost and other characteristics can effectively improve work efficiency and reduce pollution. It is an important milestone in the development of oral restoration technology and will allow more ordinary people to have good teeth, because digital technology can effectively deal with complex clinical situations. And provide consistent and high-quality restorations, which completely solve the pain points and difficulties in clinical oral medicine. At present, only German WHITE PERKS CE0483 and German Eisenbacher Dentalwaren ED, GmbH, CE0434 produce and sell cobalt-chromium porcelain alloy discs for dental restoration abroad. , still blank in China