阅读说明：本技术 一种雕刻固定义齿用钴铬烤瓷合金圆盘及其制备方法 (Cobalt-chromium ceramic alloy disc for engraving and fixing false teeth and preparation method thereof ) 是由 姚向东 朱益明 姚超 于 2019-11-27 设计创作，主要内容包括：本发明涉及到口腔医用材料,具体为一种雕刻固定义齿用钴铬烤瓷合金圆盘,所述钴铬烤瓷合金圆盘包括如下重量百分比的原料：钴50%-65%、铬20%-35%、钼3%-6%和钛1%-3%、钨5%-7%、镧0.08%-0.3%、铈0.1%-0.5%、钇0.09%-0.3%、锶0.06%-0.2%；采用如下步骤：1、用高频高温炉先将钨进行熔化后,依次添加钴、铬、钼；2、在上述金属溶化后导入真空冶炼炉中,再添加铈、镧、钛、钇、锶材料进行真空熔化,3、将已经冶炼熔化好的金属溶液导入到长方体模具,在真空中成型后取出冷却；4、对已经冷却好的合金金属锭,采用减材方法切除、分离合金中渣质,余料采用电火花线切割和车床车削加工方式加工,加工直径为98mm、厚度10mm-25mm钴铬烤瓷合金圆盘。该产品与现有产品对比,雕刻加工成品率高、质量稳定,适合推广使用。(The invention relates to a medical material for oral cavity, in particular to a cobalt-chromium ceramic alloy disc for engraving and fixing false teeth, which comprises the following raw materials in percentage by weight: 50 to 65 percent of cobalt, 20 to 35 percent of chromium, 3 to 6 percent of molybdenum, 1 to 3 percent of titanium, 5 to 7 percent of tungsten, 0.08 to 0.3 percent of lanthanum, 0.1 to 0.5 percent of cerium, 0.09 to 0.3 percent of yttrium and 0.06 to 0.2 percent of strontium; the method comprises the following steps: 1. melting tungsten by using a high-frequency high-temperature furnace, and sequentially adding cobalt, chromium and molybdenum; 2. introducing the melted metal into a vacuum smelting furnace, adding cerium, lanthanum, titanium, yttrium and strontium materials for vacuum melting, 3, introducing the melted metal solution into a cuboid mold, forming in vacuum, taking out and cooling; 4. and (3) cutting off and separating slag in the alloy by adopting a material reduction method for the cooled alloy metal ingot, machining the residual material by adopting an electric spark wire cutting and lathe turning mode, and machining a cobalt-chromium ceramic alloy disc with the diameter of 98mm and the thickness of 10mm-25 mm. Compared with the existing product, the product has high engraving yield and stable quality, and is suitable for popularization and use.)

1. The utility model provides a carving is fixed cobalt chromium porcelain alloy disc for artificial tooth which characterized in that: a cobalt-chromium porcelain alloy disc for engraving and fixing false teeth comprises the following raw materials in percentage by weight: cobalt 50-65%, chromium 20-35%, molybdenum 3-6%, titanium 1-3%, tungsten 5-7%, lanthanum 0.08-0.3%, cerium 0.1-0.5%, yttrium 0.09-0.3%, and strontium 0.06-0.2%.

2. The method for preparing the cobalt-chromium porcelain alloy disc for engraving and fixing the false teeth according to the claim 1 is characterized in that: a preparation method of a cobalt-chromium porcelain alloy disc for engraving customized fixed dentures comprises the following steps:

firstly, melting tungsten by using a high-frequency high-temperature furnace, and then sequentially adding cobalt, chromium and molybdenum according to the melting point of the material;

secondly, the metal is led into a vacuum smelting furnace after being melted, and then cerium, lanthanum, titanium, yttrium and strontium materials are added for vacuum melting, the power is 60-90 Kw, and the time is 60-90 minutes;

thirdly, guiding the melted metal solution into a cuboid mold, and taking out and cooling after forming in vacuum;

and fourthly, cutting off a casting head and oxide layers and impurities on the peripheral surface of the cooled alloy metal ingot by adopting a material reducing processing method, separating a slag gathering part in the alloy, and processing the residual material by adopting an electric spark wire cutting and lathe turning processing mode to process a cobalt-chromium baked porcelain alloy disc with the diameter of 98mm and the thickness of 10mm-25 mm.

3. The cobalt-chromium porcelain alloy disc for engraving customized permanent dentures according to claim 1, characterized in that: the cobalt, the chromium, the molybdenum, the titanium and the tungsten are high-purity materials; the lanthanum, cerium, yttrium and strontium are high-purity particle materials or nano-particle materials.

4. The method for preparing the cobalt-chromium ceramic alloy disc for engraving customized permanent dentures according to claim 2, which is characterized in that: the mould is a special steel cuboid.

5. The method for preparing the cobalt-chromium ceramic alloy disc for engraving the customized permanent denture, according to the claim 2, is characterized in that: the forming die is placed on a bracket with a vibration device in the vacuum smelting furnace.

6. The method for preparing the cobalt-chromium ceramic alloy disc for engraving the customized permanent denture, according to the claim 2, is characterized in that: the machining method comprises wire cut electrical discharge machining and turning.

Technical Field

The invention relates to a medical material for oral cavity, in particular to a cobalt-chromium ceramic alloy disc for engraving and fixing false teeth and a preparation method thereof.

Background

The alloy material for dental restoration is used for manufacturing crowns and bridges for dental fixation and restoration, is a medical biological metal material, and has extremely strict requirements on safety because a dental material product is placed in an oral cavity for a long time and is in direct contact with human tissues and must have good biocompatibility with a human body. Meanwhile, the alloy material for dental restoration has the same strict requirement on the effectiveness of a human body, because teeth are often in the environment of oral liquid for a long time besides being in contact with various acidic and alkaline substances when people eat the alloy material, the alloy material for dental restoration not only has no toxicity and harm to the human body, but also has the physical performance index requirements of high corrosion resistance, proper strength, hardness, bonding strength of metal and porcelain powder and the like, and can adapt to soft and hard tissues in the oral cavity and good machinability.

The manufacturing of false teeth by alloy materials (granules) for dental restoration belongs to the traditional false tooth manufacturing method, the manufacturing procedure is complicated, and the procedures of filling undercut, smearing gap agent, manufacturing wax pattern, embedding, roasting, casting, lathing metal and the like are required. The traditional false tooth has low processing efficiency and high labor cost, and generates a large amount of garbage, smog and dust, so that the workshop environment is poor and the health of workers is influenced. With the development of science and technology, the restoration of oral teeth presents an overturned revolution, which is not the restoration process, and the manufacture of false teeth advances the digital oral age at present.

The cobalt-chromium porcelain alloy powder is printed with a crown and a crown bridge by a material increase method 3D, the printed crown and the printed crown bridge are only molded and must be sintered at high temperature, and oxide layers of the crown and the crown bridge after high-temperature sintering can only be manually polished and cleaned, so that the thickness of the wall thickness of the crown is uneven, porcelain cracks and collapses due to uneven thickness of the wall thickness of the crown, meanwhile, the crown and the crown bridge deform due to high-temperature sintering, the edge of a false tooth worn by a patient is not closely fit, bacteria and food residues in the oral cavity enter, the service life of the tooth is shortened, and the health of the human body is influenced.

At present, a material reduction method CAD/CAM tooth engraving machine is used for manufacturing fixed false teeth, a cobalt-chromium porcelain alloy disc for dental restoration is used for manufacturing false teeth by using an integral solution of the CAD/CAM tooth engraving machine, and the method has the characteristics of simplicity in operation, high precision, edge sealing, high speed, low cost and the like, effectively improves the working efficiency, reduces pollution, is an important milestone for the development of oral restoration process industry, enables more common people to be mounted on good teeth, thoroughly solves the pain point and difficulty of oral clinical medicine because the digital technology can effectively treat complex clinical conditions and provide consistent and high-quality restorations, and only has the production and sale of WHITE PERKS CE0483 in Germany and Eisenbacher Dentware, GmbH and CE0434 in dentistry restoration abroad at present, and is still in a blank state in China.

Disclosure of Invention

In order to solve the problems in the prior art, the following technical scheme is provided through continuous tests according to the understanding of metal materials and the research on performance and application of the metal materials: a cobalt-chromium porcelain alloy disc for engraving and fixing false teeth comprises the following raw materials in percentage by weight: 50 to 65 percent of cobalt, 20 to 35 percent of chromium, 3 to 6 percent of molybdenum, 1 to 3 percent of titanium, 5 to 7 percent of tungsten, 0.08 to 0.3 percent of lanthanum, 0.1 to 0.5 percent of cerium, 0.09 to 0.3 percent of yttrium and 0.06 to 0.2 percent of strontium.

The preparation method of the cobalt-chromium porcelain alloy disc for engraving and fixing the false teeth comprises the following steps:

firstly, melting tungsten by using a high-frequency high-temperature furnace, and then sequentially adding cobalt, chromium and molybdenum according to the melting point of the material;

secondly, the metal is led into a vacuum smelting furnace after being melted, and then cerium, lanthanum, titanium, yttrium and strontium materials are added for vacuum melting, the power is 60-90 Kw, and the time is 60-90 minutes;

thirdly, guiding the melted metal solution into a cuboid mold, and taking out and cooling after forming in vacuum; the forming die is placed on a bracket with a vibration device in a vacuum smelting furnace, and the vibration is started when the molten alloy which is smelted and melted is introduced so as to lead alloy impurities to be gathered in the middle of a steel ingot;

and fourthly, cutting off a casting head and oxide layers and impurities on the peripheral surface of the cooled alloy metal ingot by adopting a material reducing processing method, separating a slag gathering part in the alloy, and processing the residual material by adopting an electric spark wire cutting and lathe turning processing mode to process a cobalt-chromium baked porcelain alloy disc with the diameter of 98mm and the thickness of 10mm-25 mm.

The mould is a special steel cuboid;

the forming die is placed on a bracket with a vibration device in the vacuum smelting furnace;

the machining method comprises wire cut electrical discharge machining and turning.

Compared with the prior art, the invention has the beneficial effects that:

the main materials of cobalt, chromium and titanium for the oral cavity false tooth are selected because of good biocompatibility but lack of physical properties, so that the tungsten and molybdenum are added because the cobalt, chromium and titanium can enable the alloy material to keep extremely high strength, creep resistance, oxidation resistance and corrosion resistance, and in addition, the cobalt, chromium and titanium can ensure no fracture in long-term use, namely have physical properties such as high-cycle fatigue resistance and low-cycle fatigue resistance.

The rare earth yttrium is an important additive of the alloy, has unique extra-nuclear electron arrangement and higher solid solubility in the alloy, can purify alloy solution, improve alloy structure, improve the mechanical properties of the alloy at room temperature and high temperature, enhance the corrosion resistance of the alloy and the like; the rare earth element strontium is added because the element plays an important role in the development of human bones and teeth.

The materials which are generally used for processing are conventional material monomers sold in the market, each monomer material has a certain amount of impurity content, and all kinds of impurities are relatively more in combination, and can be dispersed into alloy materials during processing and smelting, so that the quality of the materials and the processing utilization rate of finished products are reduced.

The product is registered and tested by the quality supervision and inspection center of northern medical instruments of the State food and drug administration, the surface of an alloy disc is smooth, no burr and crack are seen, no oxide layer is seen, the density is 8.56 (g/cm), the corrosion resistance is 7.53ug/cm (the national standard is less than 200 ug/cm), the average bonding strength of gold and porcelain is 48.5 MPa (the national standard is more than or equal to 25 MPa), and the linear expansion coefficient is 14.13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.