WO2017034306A1 - 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 co-cr계 치과용 합금 - Google Patents
절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 co-cr계 치과용 합금 Download PDFInfo
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- WO2017034306A1 WO2017034306A1 PCT/KR2016/009346 KR2016009346W WO2017034306A1 WO 2017034306 A1 WO2017034306 A1 WO 2017034306A1 KR 2016009346 W KR2016009346 W KR 2016009346W WO 2017034306 A1 WO2017034306 A1 WO 2017034306A1
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- aesthetics
- oxidation resistance
- alloy
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- corrosion resistance
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
Definitions
- the present invention relates to a Co-Cr-based dental alloy, and more particularly, having a high strength, while having a proper elongation, cutting workability, oxidation resistance, corrosion resistance and aesthetics to ensure excellent oxidation resistance This is an excellent Co-Cr based dental alloy.
- the metal has excellent mechanical properties such as tensile strength and compressive strength, but due to the unique color of the metal, the color of the natural tooth cannot be obtained as well as a disadvantage of being corroded. Therefore, in order to overcome these disadvantages, the dental prosthetic alloy which combines the excellent mechanical properties and precision of the porcelain with excellent aesthetics and metals is used.
- Dental alloys should be used in the oral cavity where various environmental changes such as temperature, acidity, pressure change, etc., should be free from wear and deformation, and should be similar to the hardness and strength of teeth and similar to the color of teeth. In addition, there should be no corrosion or discoloration in the oral cavity and there should be no human hazard. In view of the above, there is a nickel (Ni) -chromium (Cr) -based alloy for ceramic parts in the non-noble metal prosthetic alloy for dental ceramic parts that satisfies all conditions.
- Ni nickel
- Cr chromium
- Be beryllium
- beryllium (Be) not only lowers the melting point of the alloy and improves castability, but also is produced at the sintering temperature of ceramics. This is because the thickness of the oxide layer is thin, thereby improving the aesthetics and bonding strength with the ceramic material.
- Be beryllium
- its use has been limited, and commercial alloys containing no beryllium (Be) have been developed, but the bonding strength with ceramics is lower than that of the alloy containing beryllium (Be).
- the bonding strength between the alloy and the porcelain is known to depend on the coefficient of thermal expansion of the metal and the thickness, composition, roughness, etc. of the oxide layer formed on the surface of the metal, and the bonding strength of the porcelain in an alloy that does not contain beryllium (Be).
- the core technology is to control the characteristics of the oxide layer by properly designing the composition of the alloy.
- the beryllium (Be) is an alkaline earth metal belonging to Group 2 of the periodic table, used as a retarder and a reflector of a nuclear reactor, and is known as a hazardous substance. Therefore, long-term exposure to high concentrations of dust or low concentrations of dust causes acute contact dermatitis, and continuous exposure for more than one year can lead to chronic lung disease, acute interstitial pneumonia, and chronic beryllium poisoning. May cause
- the nickel (Ni) -chromium (Cr) -based alloy for the ceramic material part is to replace the human teeth, unlike the alloy used for other purposes, it is cast in a structure of different teeth to wear or after each denture treatment For this reason, yield strength or elongation must meet the appropriate standard.
- the alloy for ceramic material part is exposed to the fatigue load due to the chewing motion and its life is highly dependent on mechanical properties such as yield strength and elongation, so the better the mechanical properties, the longer it can be used.
- the Co-Cr-based dental alloy according to the related art is used as a prosthesis for ceramic materials
- the prosthetics for ceramic materials are ceramics on a tooth-shaped metal basement made through casting or CAD / CAM processing. After applying the sintering at high temperature to increase the bonding strength between the ceramic particles and the metal-ceramic to finally set in the oral cavity of the patient visiting the dentist.
- the ceramic material for ceramic parts which is a basement for applying ceramics, is oxidized during the firing process at a high temperature. Accordingly, when the color of the oxide turns too dark, the color of the artificial tooth is affected and the final artificial tooth is affected. The color is relatively black and results in aesthetically bad results in the oral cavity.
- the metal for the ceramic part since the excessive oxidation of the metal during the high temperature firing may weaken the bonding force between the metal and the ceramic and cause a decrease in the durability of the artificial tooth, the metal for the ceramic part has excellent high temperature oxidation resistance and has a bright oxide color. This is important for the aesthetics and durability of artificial teeth in the oral cavity.
- the present invention for solving the above-described problems has a high strength, while having an appropriate elongation, Co-Cr-based dental for excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics to ensure excellent oxidation resistance
- the purpose is to provide an alloy.
- Co-Cr-based dental alloy having excellent machinability, oxidation resistance, corrosion resistance, and aesthetics.
- the Co is characterized in that the addition of 60 to 70% by weight.
- the Cr is characterized in that the addition of 24 to 26% by weight.
- the Al is characterized in that the addition of 3.5 to 5.5% by weight.
- the Y is characterized in that added in 0.05 to 1.2% by weight.
- the Si is characterized in that added in 1.5 to 2.5% by weight.
- Mo: 1 to 4% by weight is characterized in that further composition.
- the Co is characterized in that the addition of 56 to 69% by weight.
- the Mo is characterized in that the addition of 1.8 to 3.5% by weight.
- Co-Cr-based dental alloy excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics is cobalt (Co) and chromium (Cr) is added as a main component, to ensure cutting processability and oxidation resistance
- Co cobalt
- Cr chromium
- Al aluminum
- Y yttrium
- Si silicon
- Mo molybdenum
- Example 1 is a graph showing the strain-stress measurement results for the specimen according to Example 1.
- Figure 2 is a graph showing the strain-stress measurement results for the specimen according to Comparative Example 1.
- Figure 3 is a graph showing the strain-stress measurement results for the specimen according to Comparative Example 2.
- Example 4 is a view showing the results of evaluation of oxidation resistance and aesthetics for the specimens according to Example 1 and Comparative Example 2.
- 5 is a graph showing the hardness measurement results according to the influence of Al in Co-Cr-based dental alloy composition.
- Figure 6 is a graph showing the hardness measurement results according to the influence of Si in Co-Cr-based dental alloy composition.
- 10 and 11 are photographs showing the results of observing oxidation resistance and aesthetics according to the influence of Si and Y in Co-Cr-based dental alloy composition.
- 13 and 14 are graphs showing the results of measuring the RGB index according to the influence of Y in Co-Cr-based dental alloy composition.
- 15 is a graph showing the results of measuring the RGB index according to the influence of Si in Co-Cr-based dental alloy composition.
- 16 is a graph showing the results of measuring the RGB index according to the influence of Al in Co-Cr-based dental alloy composition.
- 17 to 21 are graphs showing strain-strength measurement results for specimens according to the second embodiment of the present invention.
- FIG. 22 is a graph illustrating a measurement result of mechanical properties (strength and elongation) of specimens according to a second embodiment of the present invention.
- FIG. 23 is a graph illustrating a result of measuring corrosion resistance of specimens according to a second embodiment of the present invention.
- FIG. 24 is a photograph showing the results of observing the oxidation resistance and aesthetics according to the influence of Mo in Co-Cr-based dental alloy composition according to a second embodiment of the present invention.
- ... unit means a unit for processing at least one function or operation, which means hardware or software or hardware and It can be implemented in a combination of software.
- Co-Cr-based dental alloy excellent in cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the present invention is made of Cr, Al, Y, Si, Co, optionally Mo may be added.
- Co-Cr dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the present invention is tensile strength (TS): 600 ⁇ 700MPa, yield strength (YS): 400 ⁇ 550MPa and elongation (EL): 2 ⁇ It is desirable to have 10%.
- Co-Cr dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the first embodiment of the present invention, Cr: 22 to 29% by weight, Al: 2 to 6.5% by weight, Y: 0.05 to 1.5 Wt%, Si: 1-3 wt% and the remaining Co.
- Co-Cr-based dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the first embodiment of the present invention has an appropriate strength and elongation, is not bio-friendly because nickel (Ni) is not added, and silicon (Si) Lowering the melting point through the addition of) improves the ease of manufacture of the alloy.
- cobalt (Co) is added as a non-ferrous alloy for the purpose of securing excellent properties such as oxidation resistance, corrosion resistance, wear resistance and mechanical properties at high temperatures.
- cobalt (Co) is added in a content ratio of 50 to 75% by weight of the total weight of the Co-Cr-based dental alloy according to the first embodiment of the present invention, more preferably 55 to 72% by weight It can be presented, most preferably from 60 to 70% by weight.
- Chromium (Cr) has the advantage of good corrosion resistance and is a passivation mechanism by the formation of a dense oxide film is added for the purpose of maintaining stability in the oral environment.
- chromium (Cr) is added in an amount ratio of 22 to 29% by weight of the total weight of the Co-Cr-based dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the first embodiment of the present invention. , More preferably 23 to 27% by weight, most preferably 24 to 26% by weight.
- Aluminum (Al) is made of an alloy to compensate for the weak strength of the weakness to increase the strength while being light, and serves to improve the oxidation resistance and aesthetics.
- aluminum (Al) is 2 to 6.5% by weight of the total weight of the Co-Cr-based dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the first embodiment of the present invention. It may be added in a content ratio, more preferably 3.0 to 6.0% by weight, and most preferably 3.5 to 5.5% by weight.
- Yttrium (Y) plays an important role in improving aesthetics by increasing ductility along with improving strength, in particular by improving oxidation resistance of the alloy. Therefore, yttrium (Y) is added in an amount ratio of 0.05 to 1.5% by weight of the total weight of the Co-Cr-based dental alloy having excellent machinability, oxidation resistance, corrosion resistance, and aesthetics according to the first embodiment of the present invention. Preferably 0.05 to 1.4% by weight can be presented, most preferably 0.05 to 1.2% by weight.
- Silicon (Si) not only improves the strength, but also lowers the melting point, thereby improving the ease of alloy production. Therefore, silicon (Si) is added in an amount ratio of 1 to 3% by weight of the total weight of the Co-Cr-based dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the first embodiment of the present invention. Preferably from 1.25 to 2.7% by weight, most preferably from 1.5 to 2.5% by weight.
- Co-Cr dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics is cobalt (Co) and chromium (Cr) is added as a main component, to ensure cutting processability and oxidation resistance
- Co cobalt
- Cr chromium
- Al aluminum
- Y yttrium
- Si silicon
- the raw materials having the composition shown in Table 2 were charged to the crucible in a vacuum atmosphere, dissolved at high temperatures of 1500 ° C., 1550 ° C., 1600 ° C. and 1650 ° C., respectively, and then injected into a mold and naturally cooled for 1 hour. Bulk disc discs were prepared. In this case, the bulk disk specimens were manufactured with a diameter of 100 mm and a thickness of 10 mm, and samples (a, b, c) of three parts of the disk specimens according to Examples 1 to 4 were collected to perform mechanical strength and oxidation resistance tests. Was carried out.
- the bulk disk specimens according to Comparative Examples 1 and 2 were obtained from commercially available alloy products ZeroCopy and MESA Lucens having a diameter of 100 mm and a thickness of 10 mm, and samples (a, b, c) of three parts were taken to obtain mechanical strength and Oxidation resistance test was performed. At this time, ZeroCopy was made of Co-21Cr-4.7Mo-7W-1.5Si, and MESA Lucens was made of Co-28Cr-4Nb-3W-1Si.
- Table 3 shows the mechanical property evaluation results for the specimens according to Examples 1 to 4 and Comparative Examples 1 to 2.
- Figure 1 is a graph showing the strain-stress measurement results for the specimens according to Example 1
- Figures 2 and 3 are each showing the strain-stress measurement results for the specimens according to Comparative Examples 1 and 2 It is a graph.
- Example 1 a 457.5 655.1 3.45 b 448.6 629.1 2.75 c 427.9 630.8 3.40 Ave. 444.7 638.3 3.20
- Example 2 a 461.6 650.6 4.06 b 457.3 642.7 3.72 c 451.8 632.3 3.36 Ave. 451.6 641.9 3.71
- Example 3 a 471.1 671.9 4.01 b 461.6 665.4 3.95 c 457.9 659.7 3.61 Ave. 463.5 665.6 3.86
- Example 4 a 472.6 673.1 3.97 b 457.9 669.4 3.85 c 461,3 657.3 3.77 Ave.
- the average value of the tensile strength (TS) is measured to 665.6MPa and 666.6MPa, respectively, it can be confirmed that the strength characteristics are the best.
- nickel (Ni) which is not suitable as a biomaterial, is not added, it is biocompatible and the melting point may be lowered through the addition of silicon (Si).
- FIG. 4 is a view showing the results of evaluation of oxidation resistance and aesthetics for the specimens according to Example 1 and Comparative Example 2.
- the oxidation resistance and the aesthetics of the specimens according to Example 1 and Comparative Example 2 the oxidation resistance for each specimen in a state exposed for 5, 15, 30, 40 and 60 minutes in an atmospheric atmosphere of 927 °C temperature, respectively And aesthetics were visually determined.
- colors are distinguished according to RGB index values, and the higher the RGB index value, the brighter the color.
- the RGB index value is 100 or more even after 40 minutes have elapsed
- the RGB index value is 100 after 5 minutes have elapsed. It turns out that the following is shown.
- Example 1 shows a brighter oxide color than the specimen according to Comparative Example 2.
- FIG. 5 is a graph showing the hardness measurement results according to the influence of Al in the Co-Cr-based dental alloy composition
- Figure 6 is a graph showing the hardness measurement results according to the influence of Si in the Co-Cr-based dental alloy composition
- 7 is a graph showing the hardness measurement results according to the influence of the Y in Co-Cr-based dental alloy composition.
- Figure 5 shows that using a dental alloy having a composition of Co-25Cr-xAl-aSi-bY (where x is 1, 2, 5, 7, a is 1.5, b is 0.2)
- Figure 6 illustrates the use of a dental alloy having a composition of Co-25Cr-aAl-xSi-bY, where a is 5, x is 0, 0.7, 1.5, 2.5 and b is 0.2
- 7 shows Co-25Cr-aAl-bSi-xY (where a is 5, b is 1.5, x is 0.05, 0.2, 0.6, 1.2) and Co-25Cr-cAl-dSi-xY. Where c is 1, d is 2.5 and x is 0.05, 0.15, 0.6, 1.2.
- Al showed a tendency to increase the hardness when added 2wt% or more, but when excessively added in the content ratio of 7wt% exhibits a hardness value of approximately 550Hv adversely affects the workability I think it's going crazy.
- Vickers hardness was slightly different depending on the amount of Al and Si added when the amount of Y was changed, but as the amount of Y was increased, the Vickers hardness increased, and the overall Vickers hardness value was appropriate. It confirmed that it represents. However, when 1 wt% Al and 0.05 wt% Y were added, the hardness, that is, the strength of the alloy was measured to be somewhat low.
- FIGS. 8 and 9 are photographs showing the results of observing the oxidation resistance and aesthetics according to the effect of Al and Y in Co-Cr-based dental alloy composition
- Figures 10 and 11 are in the Co-Cr-based dental alloy composition
- Photo shows the results of observing oxidation resistance and aesthetics according to the influence of Si and Y. More specifically, FIGS. 8 and 10 are photographs taken after exposure at 950 ° C. for 15 minutes, and FIGS. 9 and 11 are photographs taken after exposure at 950 ° C. for 60 minutes.
- the oxidation resistance is greatly improved as the amount of Al is increased, and particularly, when the amount of Al is added 2 wt% or more, it has been confirmed that it has excellent oxidation resistance and aesthetics.
- the oxides are color-coded according to RGB index values, and the higher the RGB index value, the brighter the color.
- an alloy composition having an oxide color of 100 or more based on the RGB index value of the oxide color was an oxide color-related target.
- FIG. 13 and 14 are graphs showing the results of measuring the RGB index according to the influence of Y in Co-Cr-based dental alloy composition
- Figure 15 is a RGB index according to the effect of Si in Co-Cr-based dental alloy composition
- Figure 16 is a graph showing the result of measuring
- Figure 16 is a graph showing the result of measuring the RGB index according to the effect of Al in the Co-Cr-based dental alloy composition.
- FIG. 13 shows that using a dental alloy having a composition of Co-25Cr-aAl-bSi-xY (where a is 1, b is 2.5, x is 0.05, 0.15, 0.6, 1.2),
- FIG. 14 illustrates the use of a dental alloy having a composition of Co-25Cr-cAl-dSi-xY, wherein a is 5, b is 1.5 and x is 0.05, 0.15, 0.2, 0.6, 1.2.
- FIG. 15 illustrates the use of a dental alloy having the composition Co-25Cr-aAl-xSi-bY, wherein a is 5, x is 0, 1.0, 1.5, 2.5, and b is 0.2.
- FIG. I a dental alloy having a composition of Co-25Cr-xAl-aSi-bY, wherein x is 1.0, 2.0, 5.0, 7.0, a is 1.5, and b is 0.2.
- the results of 5 minutes exposure at 950 ° C. showed that the RGB index increased as the amount of Y added increased to 0.05 wt% or more, and the oxide color was brightened.
- Y is added to 1.2wt%, even when the high temperature exposure of about 40 minutes, the oxide color was found to be preferable because the value of the RGB index 100 or more, but as the amount of Y added increases Since the brightness tends to decrease in color and the castability deteriorates, it is confirmed that it is preferable to add it in the content ratio of 1.2 wt% or less.
- Si had a great influence on maintaining a bright oxide color as the amount of addition increased at the beginning of high temperature exposure, and when exposed from 5 minutes to 15 minutes at a high temperature of 950 ° C.
- Si addition helps to make the oxide color brighter, but when added excessively in a content ratio of more than 3wt%, the content of 3wt% or less can be excessively increased by reducing the workability by excessively increasing the hardness of the alloy. It turns out that it is preferable to add in ratio.
- the RGB index value generally shows a dark oxide color of 100 or less.
- the RGB index was measured to be 100 or more even at a high temperature exposure time of 30 minutes.
- Al is preferably added in an amount ratio of more than 1wt%, more preferably 2.0wt. It was confirmed that it is advantageous to add more than%.
- Co-Cr-based dental alloy excellent in cutting processability, oxidation resistance, corrosion resistance and aesthetics according to the second embodiment of the present invention is a molybdenum (Mo) is added to the first embodiment described above by a predetermined weight% composition .
- Mo molybdenum
- Co-Cr dental alloy having excellent machinability, oxidation resistance, corrosion resistance and aesthetics is Cr: 22 to 29 wt%, Al: 2 to 6.5 wt%, Y: 0.05 to 1.5 wt%, Si: 1 to 3 wt%, Mo: 1-4 wt% and the remaining Co.
- Co-Cr dental alloys having excellent machinability, oxidation resistance, corrosion resistance and aesthetics according to the second embodiment of the present invention also have moderate strength and elongation, and are not bio-friendly since nickel (Ni) is not added, and silicon (Si) The addition of) lowers the melting point and contributes to increased corrosion resistance and strength without compromising the aesthetics of the alloy.
- molybdenum (Mo) is added as a non-ferrous alloy for the purpose of securing excellent properties such as oxidation resistance, corrosion resistance, wear resistance and mechanical properties at high temperatures.
- molybdenum (Mo) is added in a content ratio of 1 to 4% by weight of the total weight of the Co-Cr-based dental alloy according to the second embodiment of the present invention, more preferably 1.8 to 3.5% by weight It is possible to present, most preferably from 2 to 3% by weight.
- FIG. 17 to 21 are graphs showing strain-strength measurement results for specimens according to the second embodiment of the present invention.
- 22 is a graph showing the results of measuring mechanical properties (strength, elongation) for the specimens according to the second embodiment of the present invention
- Figure 23 is a result of measuring the corrosion resistance of the specimens according to the second embodiment of the present invention A graph representing. In the experimental method of FIG.
- Mo tends to decrease slightly as Mo decreases, but does not show a sharp decrease and still maintains sufficient strength.
- the elongation was kept substantially constant, so that there was no detrimental effect on the mechanical properties, and when Mo was less than 1%, the amount of release due to corrosion was significantly increased.
- Figure 24 is a photograph showing the results of observing the oxidation resistance and aesthetics according to the influence of Mo in Co-Cr-based dental alloy composition according to a second embodiment of the present invention. At this time, Figure 24 shows that using a dental alloy having a composition of Co-25Cr-3.5Al-0.1Y-1.2Si-xMo (where x is 1, 3, 5, 7, 9).
- the change in oxide color (aesthetics) according to the Mo addition amount is insignificant, and all of the 1Mo to 4Mo alloys maintain the bright oxide color at the initial temperature. Confirmed.
- Co-Cr dental alloy having excellent cutting processability, oxidation resistance, corrosion resistance and aesthetics is cobalt (Co) and chromium (Cr) is added as a main component, cutting processability, corrosion resistance and oxidation resistance
- Co cobalt
- Cr chromium
- Al aluminum
- Y yttrium
- Si silicon
- Mo molybdenum
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Abstract
Description
| 분류 | 항복강도(MPa) | 연신율(%) |
| 0 | - | - |
| 1 | 80 | 18 |
| 2 | 180 | 10 |
| 3 | 270 | 5 |
| 4 | 360 | 2 |
| 5 | 500 | 2 |
| 구분 | Co | Ni | Cr | Al | Y | Si |
| 실시예시 1 | 69.25 | - | 24.0 | 4.5 | 0.35 | 1.90 |
| 실시예시 2 | 72.41 | - | 22.5 | 3.5 | 0.04 | 1.55 |
| 실시예시 3 | 68.03 | - | 25.1 | 4.7 | 0.42 | 1.75 |
| 실시예시 4 | 67.78 | - | 24.9 | 5.1 | 0.37 | 1.85 |
| 구분 | YS(MPa) | TS(MPs) | EL(%) | |
| 실시예시 1 | a | 457.5 | 655.1 | 3.45 |
| b | 448.6 | 629.1 | 2.75 | |
| c | 427.9 | 630.8 | 3.40 | |
| Ave. | 444.7 | 638.3 | 3.20 | |
| 실시예시 2 | a | 461.6 | 650.6 | 4.06 |
| b | 457.3 | 642.7 | 3.72 | |
| c | 451.8 | 632.3 | 3.36 | |
| Ave. | 451.6 | 641.9 | 3.71 | |
| 실시예시 3 | a | 471.1 | 671.9 | 4.01 |
| b | 461.6 | 665.4 | 3.95 | |
| c | 457.9 | 659.7 | 3.61 | |
| Ave. | 463.5 | 665.6 | 3.86 | |
| 실시예시 4 | a | 472.6 | 673.1 | 3.97 |
| b | 457.9 | 669.4 | 3.85 | |
| c | 461,3 | 657.3 | 3.77 | |
| Ave. | 463.9 | 666.6 | 3.86 | |
| 비교예 1 | a | 512.2 | 614.1 | 1.97 |
| b | 466.2 | 588.0 | 2.26 | |
| c | 501.7 | 624.6 | 2.42 | |
| Ave. | 493.4 | 608.9 | 2.22 | |
| 비교예 2 | a | 453.5 | 529.4 | 7.94 |
| b | 417.0 | 459.4 | 7.59 | |
| c | 436.6 | 486.0 | 5.42 | |
Claims (9)
- Cr : 22 ~ 29 중량%,Al : 2 ~ 6.5 중량%,Y : 0.05 ~ 1.5 중량%,Si : 1 ~ 3 중량% 및나머지 Co로 조성되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,상기 Co는60 ~ 70 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,상기 Cr은24 ~ 26 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,상기 Al은3.5 ~ 5.5 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,상기 Y는0.05 ~ 1.2 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,상기 Si는1.5 ~ 2.5 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제1항에 있어서,Mo : 1 ~ 4 중량%가 더 조성되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제7항에 있어서,상기 Co는56 ~ 69 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
- 제7항에 있어서,상기 Mo는1.8 ~ 3.5 중량%로 첨가되는 것을 특징으로 하는 절삭 가공성, 내산화성, 내식성 및 심미성이 우수한 Co-Cr계 치과용 합금.
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| KR1020177018375A KR101900735B1 (ko) | 2015-08-25 | 2016-08-23 | 절삭 가공성, 내산화성 및 심미성이 우수한 Co-Cr계 치과용 합금 |
| CN201680014805.9A CN107406919B (zh) | 2015-08-25 | 2016-08-23 | 切削加工性、抗氧化性、耐腐蚀性及审美性优秀的Co-Cr类牙科用合金 |
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| KR10-2015-0119398 | 2015-08-25 | ||
| KR20150119398 | 2015-08-25 | ||
| KR10-2016-0077961 | 2016-06-22 | ||
| KR1020160077961A KR101753094B1 (ko) | 2015-08-25 | 2016-06-22 | 절삭 가공성, 내산화성 및 심미성이 우수한 Co-Cr계 치과용 합금 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647702A (ja) * | 1992-07-13 | 1994-02-22 | Misawa Homes Co Ltd | 枠体構成材の端部切断装置 |
| US20080232998A1 (en) * | 2007-03-21 | 2008-09-25 | Arun Prasad | Non-magnetic cobalt-palladium dental alloy |
| US20080241788A1 (en) * | 2007-03-19 | 2008-10-02 | Degudent Gmbh | Method for the manufacture of dental prostheses |
-
2016
- 2016-08-23 WO PCT/KR2016/009346 patent/WO2017034306A1/ko not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647702A (ja) * | 1992-07-13 | 1994-02-22 | Misawa Homes Co Ltd | 枠体構成材の端部切断装置 |
| US20080241788A1 (en) * | 2007-03-19 | 2008-10-02 | Degudent Gmbh | Method for the manufacture of dental prostheses |
| US20080232998A1 (en) * | 2007-03-21 | 2008-09-25 | Arun Prasad | Non-magnetic cobalt-palladium dental alloy |
Non-Patent Citations (2)
| Title |
|---|
| KIM, KI - BEAK ET AL.: "Comparison of the Marginal and Internal Fit of Cores Fabricated by Ni-Cr Alloy(non-beryllium) and Co-Cr Alloy", THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY, vol. 34, no. 4, 2012, pages 353 - 359, XP055366559 * |
| PARK, SOO - CHUL ET AL.: "Corrosion Resistance Evaluation in the Co-Cr Alloys for the Full and Removable Partial Denture Metal Frameworks and the Porcelain-fused-to-metal Crown", THE JOURNAL OF KOREAN ACADEMY OF DENTAL TECHNOLOGY, vol. 34, no. 3, pages 237 - 245, XP055366560 * |
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