KR20040047148A - Dental Precious Alloy and Method of Making the Same - Google Patents

Dental Precious Alloy and Method of Making the Same Download PDF

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KR20040047148A
KR20040047148A KR1020020075254A KR20020075254A KR20040047148A KR 20040047148 A KR20040047148 A KR 20040047148A KR 1020020075254 A KR1020020075254 A KR 1020020075254A KR 20020075254 A KR20020075254 A KR 20020075254A KR 20040047148 A KR20040047148 A KR 20040047148A
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palladium
alloy
precious metal
dental
iridium
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KR1020020075254A
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Korean (ko)
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박영준
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주식회사 케이디엠
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Publication of KR20040047148A publication Critical patent/KR20040047148A/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/14—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of noble metals or alloys based thereon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dental Preparations (AREA)

Abstract

PURPOSE: A dental precious metal alloy is provided to secure price competitiveness, improve mechanical properties, solve demerits generated as Pd is being added by reducing contents of expensive Pt and Pd and adding small amounts of Ir and Rh, and a method for manufacturing the same is provided. CONSTITUTION: In a manufacturing method of a dental precious metal alloy composition comprising the steps of charging the dental precious metal alloy composition consisting of Au, Pt, Pd, Ag, Cu, Zn, In, Ir and Rh into vacuum induction furnace, creating a vacuum atmosphere to 10¬-3 torr in the vacuum induction furnace and injecting an inert gas (argon) of about 50 torr into the vacuum induction furnace so that the alloy composition for dental metal-ceramic crown is melted; heat treating the molten metal in the mold by injecting melting completed molten metal into a precision casting graphite mold installed in chamber of the vacuum induction furnace under the vacuum state; stretching the heat treated cast article using a rolling mill; and manufacturing a final product by marking and cutting the stretched cast article, the method for manufacturing dental precious metal alloy is characterized in that the Ir and Rh are added to the alloy composition in a type of Pd-Ir master alloy comprising 92 wt.% of Pd and 8 wt.% of Ir and a type of Pd-Rh master alloy comprising 90 wt.% of Pd and 10 wt.% of Rh so that the Ir and Rh added alloy composition is injected into the vacuum induction furnace.

Description

치과용 귀금속합금 및 그의 제조방법 {Dental Precious Alloy and Method of Making the Same}Dental Precious Alloy and Method for Making the Same {Dental Precious Alloy and Method of Making the Same}

본 발명은 치과용으로 사용되는 독성이 없으며, 세라믹과 융착성이 우수한 치과보철물을 제작할 때 사용하는 치과주조용 및 금속-세라믹용 치과 귀금속 합금에 관한 것이다.The present invention relates to a dental noble metal alloy for dental casting and metal-ceramic for use in the manufacture of non-toxic dental dental prosthesis which is excellent in fusion with ceramics.

치과주조용 및 금속-세라믹용 치과 귀금속 합금의 주성분은 귀금속으로서 금(Au), 백금(Pt), 팔라디움(Pd), 은(Ag)과 비귀금속인 동(Cu), 그리고 소량의 아연(Zn), 인듐(In), 주석(Sn) 등을 첨가하여 제조된다.The main components of dental noble metal alloys for dental casting and metal-ceramic are precious metals such as gold (Au), platinum (Pt), palladium (Pd), silver (Ag) and copper (Cu), and small amounts of zinc (Zn). ), Indium (In), tin (Sn) and the like.

상기 치과용 귀금속 합금은 인체의 구강내에서 직접 사용되기 때문에 첫째로, 인체에독성이 없어야 하며, 구강내에서 부식이나 변색등이 없어야 한다. 둘째로 저작압에 견딜수 있어야 하고 마모, 변형등이 없어야 하며, 치아의 경도 및 강도와 비슷해야 하고 치아색과 유사해야 한다. 또한 일반 기공소에서 전기주조나, 산소-프로판가스에 의해 쉽게 용해할 수 있어야 하며, 세라믹과 결합성이 우수하여야 하고, 경제성이 있어야하는 등의 여러 가지 특성을 가져야 한다. 따라서 융점이 비교적 낮고 주조성이 우수하며 공기중에서도 산화가 발생하지 않는 75% 이상 금함량의 합금이 널리 사용되고 있으나, 강도가 약하여 길이가 긴 가공의치의 제조시 보철물에 변형이 발생되거나 파절되는 경우가 발생한다.Since the dental precious metal alloy is directly used in the oral cavity of the human body, first, it should not be toxic to the human body, and there should be no corrosion or discoloration in the oral cavity. Secondly, it must be able to withstand chewing pressure, no wear and deformation, and should be similar to the hardness and strength of teeth and similar to the color of teeth. In addition, it should be able to be easily dissolved by electric casting or oxygen-propane gas in a general laboratory, and should have various properties such as excellent bonding with ceramics and economical efficiency. Therefore, alloys with a gold content of 75% or more, which have a relatively low melting point, excellent castability, and do not cause oxidation in the air, are widely used.However, when the length of dentures is long, deformation or fracture of the prosthesis may occur. Occurs.

이러한 문제점을 극복하기 위해, 부식저항성이 높고 생체적합성이 우수한 백금(Pt)이나 팔라디움(Pd)을 첨가하여 사용한다. 그러나 백금이나 팔라디움은 값이 비싸고 금합금을 희게하는 경향이 있으며, 특히 팔라디움은 수소와 다른 기체를 흡수하여 수소취성(주조물 균열 및 파절)을 일으키거나 합금에 기포를 발생시켜 주조성을 감소시키는 단점이 있다.In order to overcome this problem, platinum (Pt) or palladium (Pd) having high corrosion resistance and excellent biocompatibility is added and used. However, platinum and palladium are expensive and tend to whiten the gold alloy, and palladium, in particular, has the disadvantage of absorbing hydrogen and other gases, causing hydrogen embrittlement (cast cracks and fractures) or bubbles in the alloy to reduce castability. .

따라서 본 발명은 이와같은 종래의 보철합금이 갖고있는 문제점을 해결하기 위하여 고가인 백금 및 팔라디움의 함량을 크게 줄이고 소량의 이리듐(Ir), 로디움(Rh)을 첨가시켜 기존의 합금과 제반 성질이 유사하지만 경제성이 우수하고, 다량의 팔라디움이 첨가됨으로써 발생하는 수소취성, 주조성 저하, 치아 경도보다 더 강한 경도값을 갖는 등의 단점들을 해결하였다. 또한 입자 미세화 효과가 있는 Ir, Rh을 첨가시킴으로써 주조결함을 없애고, 입자의 미세화를 통해 기계적성질을 크게 향상시켰다.Therefore, in order to solve the problems of the conventional prosthetic alloys, the present invention significantly reduces the content of expensive platinum and palladium and adds a small amount of iridium (Ir) and rhodium (Rh) to improve existing alloys and properties. Similar but economical, and solved the disadvantages such as hydrogen embrittlement caused by the addition of a large amount of palladium, reduced castability, having a hardness value stronger than tooth hardness. In addition, by adding Ir and Rh having a particle refining effect, casting defects were eliminated, and the mechanical properties were greatly improved by refining the particles.

본 발명은 중량%로 금 65∼77%, 백금 1∼4%, 팔라디움 0.5∼6%, 은 8∼16%, 동 5∼10%, 아연 0.2∼2%, 인듐 0.1∼1.0%로 이루어지는 치과 귀금속 합금에 있어서, 상기 치과 귀금속합금 100중량% 중에 이리듐(Ir) 0.07-0.3%, 로디움(Rh) 0.1-0.35%이 포함되도록 구성되어진다. 이때 상기 이리듐(Ir)과 로디움(Rh)의 첨가는 백금과 팔라디움의 부족분을 대신해서 첨가되도록 한다.Dentistry of the present invention comprises 65 to 77% gold, 1 to 4% platinum, 0.5 to 6% palladium, 8 to 16% silver, 5 to 10% copper, 0.2 to 2% zinc and 0.1 to 1.0% indium. In the precious metal alloy, 0.07-0.3% of iridium (Ir) and 0.1-0.35% of rhodium (Rh) are included in 100% by weight of the dental precious metal alloy. At this time, the addition of iridium (Ir) and rhodium (Rh) is to be added in place of the shortage of platinum and palladium.

또 본 발명은 중량%로 금 65∼77%, 백금 1∼4%, 팔라디움 0.5∼6%, 은 8∼16%, 동 5∼10%, 아연 0.2∼2%, 인듐 0.1∼1.0%, 이리듐 0.07-0.3%, 로디움 0.1-0.35%로 이루어지는 치과용 귀금속 합금조성물을 진공유도로에 장입하여 10-3 torr 까지 진공분위기를 조성한 후 약 50 torr의 불활성가스(아르곤)를 주입하여 용해하고, 용해가 끝난 용탕을 진공상태에서 진공유도로 챔버안에 설치된 정밀 주조용 흑연 주형에 주입한 후, 이를 열처리하고 그 후 압연기를 이용하여 주조체를 늘린 후 각인 및 절단을 하여 최종 제품을 만드는 단계로 이루어지는 치과용 귀금속 합금조성물 제조방법이며, 이때 상기 이리듐(Ir)의 첨가는 팔라디움(Pd)-이리듐(Ir) 모합금의 형태로 첨가하여 진공유도로에 투입하도록 하였다. 이때 상기 팔라디움(Pd)-이리듐(Ir) 모합금은 무게비로 팔라디움 92wt%, 이리듐 8wt%가 바람직하였다. 또한, 로디움(Rh)의 첨가도 팔라디움(Pd)-로디움(Rh) 모합금의 형태로 첨가하여 진공유도로에 투입하도록 하며, 이때 상기 팔라디움(Pd)-로디움(Rh) 모합금은 무게비로 팔라디움 90wt%, 로디움 10wt%가 바람직하였다.In the present invention, 65 to 77% of gold, 1 to 4% of platinum, 0.5 to 6% of palladium, 8 to 16% of silver, 5 to 10% of copper, 0.2 to 2% of zinc, 0.1 to 1.0% of indium, and iridium A dental noble metal alloy composition consisting of 0.07-0.3% and 0.1-0.35% rhodium is charged into a vacuum induction furnace to form a vacuum atmosphere up to 10-3 torr, and then injected with about 50 torr of inert gas (argon) to dissolve. The molten metal is poured into the precision casting graphite mold installed in the chamber under vacuum induction under vacuum, then heat-treated, and then the casting is stretched using a rolling mill, followed by stamping and cutting to make a final product. Dental noble metal alloy composition manufacturing method, wherein the addition of iridium (Ir) was added in the form of palladium (Pd) -iridium (Ir) mother alloy to be introduced into the vacuum induction. In this case, the palladium (Pd)-iridium (Ir) mother alloy is preferably a palladium 92wt%, iridium 8wt% by weight. In addition, the addition of rhodium (Rh) is also added in the form of a palladium (Pd) -rhodium (Rh) mother alloy to be introduced into the vacuum induction, wherein the palladium (Pd) -rhodium (Rh) mother alloy is Palladium 90 wt% and rhodium 10 wt% were preferred as weight ratios.

금(Au), 백금(Pt), 팔라디움(Pd) 등과 같은 귀금속을 포함하여 제조되어지는 치과용 귀금속합금에 있어서 본 발명은 상기 주성분 중 고가인 백금(Pt)과 팔라디움(Pd)의 양을 줄이고, 대신 부식 및 변색저항성이 높고, 생체적합성이 뛰어난 이리듐(Ir), 로디움(Rh)을 소량 첨가하여 주조결함을 줄이고, 기계적 성질을 향상 시켰다. 이들 첨가 원소의 효과는 상호간에 서로 복잡하게 작용하므로 그 함량이 특정범위를 초과하거나 부족한 경우에는 첨가 원소의 효과를 상실하거나 역효과를 일으키게 된다. 따라서 본 발명은 수많은 실험을 통하여 얻은 결과로서 중량 %로 첨가 원소의 함량은 이리듐(Ir) 0.07-0.3%, 로디움(Rh) 0.1-0.35%로 제한하였다.In the dental precious metal alloy which is manufactured by including precious metals such as gold (Au), platinum (Pt), and palladium (Pd), the present invention reduces the amount of platinum (Pt) and palladium (Pd), which are expensive among the main components. Instead, the high corrosion resistance and discoloration resistance and excellent biocompatibility of iridium (Ir) and rhodium (Rh) are added to reduce casting defects and improve mechanical properties. Since the effects of these additional elements are complex with each other, if the content exceeds or falls short of a specific range, the effects of the additional elements are lost or adversely affected. Therefore, in the present invention, as a result of numerous experiments, the content of added elements in weight% was limited to 0.07-0.3% of iridium (Ir) and 0.1-0.35% of rhodium (Rh).

본 발명의 치과용 합금의 조성 및 효과는 다음과 같다. 금은 치과용 귀금속 합금의 기본이 되는 원소로 부식 및 변색 저항성, 연성을 높게 해준다. 백금, 팔라디움은 금합금을 단단하게 하기 위해서 쓰이며 값이 비싸고 용융온도가 높기 때문에 주조용 합금의 경우 사용량에는 제한이 있다. 팔라디움의 경우 수소와 다른 기체를 흡수하여 수소취성(주조물 균열 및 파절)을 일으키거나 합금에 기포를 발생시켜 주조성을 감소 시키으로 그 양을 제한하여야 한다. 은, 동은 합금의 경도와 강도를 증가시키나, 변색, 부식 저항성이 낮고, 특히 동은 세포독성이 있어 동을 첨가할 때 매우 신중을 기해야 한다.The composition and effects of the dental alloy of the present invention are as follows. Gold is a basic element of dental precious metal alloys, which increases corrosion, discoloration resistance and ductility. Platinum and palladium are used to harden the gold alloy, and because the price is high and the melting temperature is high, the amount of casting alloy is limited. In the case of palladium, the amount should be limited by absorbing hydrogen and other gases to cause hydrogen embrittlement (cracking and fracture of castings) or bubbles in the alloy to reduce castability. Silver and copper increase the hardness and strength of the alloy, but are low in discoloration and corrosion resistance, especially copper is cytotoxic, so care must be taken when adding copper.

고가인 백금, 팔라디움의 함량을 크게 줄이고, 대신 결정립 미세화 성분으로서 이리듐(Ir)과 로디움(Rh)을 소량 첨가함으로써 기계적 성질과 변색 및 부식 저항성을 향상시켰으며, 주조결함을 감소시켰다.It significantly reduced the content of expensive platinum and palladium, and instead added a small amount of iridium (Ir) and rhodium (Rh) as grain refining components to improve mechanical properties, discoloration and corrosion resistance, and reduced casting defects.

이리듐(Ir)의 경우 0.07% 이하에서는 주조결함 감소와 기계적성질 향상에 영향을 주지 못하고, 0.3% 이상 첨가되면 첨가 효과가 더 이상 나타나지 않았으며, 석출 결함물로 작용하여 변색, 파절 발생의 원인이 되었다.In the case of iridium (Ir), 0.07% or less did not affect casting defects and improve mechanical properties, and when 0.3% or more was added, the effect of addition did not appear anymore. It became.

로디움(Rh)의 경우 0.1%이하에서는 이리듐(Ir)과 마찬가지로, 주조결함 감소와 기계적성질 향상에 영향을 주지 못하고, 0.35% 이상 첨가되면 첨가효과가 더 이상 나타나지 않았으며, 석출 결함물로 작용하여 변색, 파절 발생의 원인과 주조결함이 발생하였다. 따라서 그 양을 0.1-0.35% 범위로 제한하였다.In the case of rhodium (Rh), below 0.1%, like iridium (Ir), does not affect the reduction of casting defects and the improvement of mechanical properties, and when more than 0.35% is added, the additive effect no longer appears, and it acts as a precipitation defect. As a result, discoloration and fracture occurred and casting defects occurred. Therefore, the amount was limited to the range 0.1-0.35%.

본 발명의 치과용 귀금속 합금은 이상의 성분들을 이용하여 제조하였다. 이들 성분의 상호 역학관계를 고려하여 기계적, 화학적 성질이 우수하고 생체적합성이 뛰어난 합금을 제조하기 위해 수많은 실험이 행하여졌다. 또한 합금 제조시 Ir, Rh은 융점이 높아 합금화가 매우 어려워서, 이러한 문제점을 해결하기 위해 Pd-Ir, Pd-Rh을 우선 합금화시켰다(pre-alloying). 미리 합금화된 이들 모합금을 이용하여 합금을 제조함으로써 성분의 균일분포를 꾀하였고, 이들 모합금의 중량 %는 Pd-8%Ir, Pd-10%Rh로 구성되었다.Dental precious metal alloy of the present invention was prepared using the above components. Considering the mutual dynamics of these components, numerous experiments have been conducted to produce alloys having excellent mechanical and chemical properties and excellent biocompatibility. In addition, since the melting point of the alloy, Ir, Rh has a high melting point, very difficult to alloy, Pd-Ir, Pd-Rh first alloyed (pre-alloying) to solve this problem. The alloys were prepared using these prealloyed master alloys to achieve uniform distribution of the components, and the weight percent of these master alloys consisted of Pd-8% Ir and Pd-10% Rh.

이상에서 설명하였듯이 본 발명의 치과용 귀금속합금은 인체에 해가되는 유독한 성분을 전혀 함유하지 않았으며, 강도와 인성 등 기계적 성질이 매우 우수하며, 부식, 변색 저항성이 높고, 주조결함이 크게 감소하였다. 또한 생물학적실험 결과 생체적합성이 뛰어나고 주조성이 우수한 여러 장점을 갖고 있다.As described above, the dental precious metal alloy of the present invention does not contain any toxic components harmful to the human body, and has excellent mechanical properties such as strength and toughness, high corrosion and discoloration resistance, and greatly reduce casting defects. It was. In addition, as a result of biological experiments have excellent advantages in biocompatibility and excellent castability.

실시 예 1Example 1

무게비로(wt%) 금 76.0%, 백금 2.0%, 팔라디움 0.5%, 은 12.2%, 동 8.8%, 아연 0.2%, 인듐 0.1%, 이리듐 0.2%(이때 이리듐은 Pd-8%Ir 모합금의 형태로 첨가)을 진공유도로에 장입하여 10-3 torr 까지 진공분위기를 조성한후 약 50 torr의 불활성 아르곤가스를 주입하여 용해하였다. 용해가 끝난 용탕을 진공상태에서 진공유도로 챔버안에 설치된 정밀 주조용 흑연 주형에 주입하였다. 균질화를 향상시키기 위해 열처리한후 압연기를 이용하여 주조체를 늘린 후 절단을 하여 시험편을 만들었다.By weight ratio (wt%) Gold 76.0%, Platinum 2.0%, Palladium 0.5%, Silver 12.2%, Copper 8.8%, Zinc 0.2%, Indium 0.1%, Iridium 0.2% (Iridium is the form of Pd-8% Ir master alloy) ) Was charged into a vacuum induction furnace to form a vacuum atmosphere up to 10-3 torr, and then dissolved by injecting about 50 torr of inert argon gas. The molten molten metal was injected into the precision casting graphite mold installed in the chamber under vacuum under vacuum. After the heat treatment to improve the homogenization, the cast body was stretched using a rolling mill and cut to make a test piece.

이상과 같이 제조된 합금을 기공소에서 사용하는 산소-프로판가스 토치를 이용하여 용해한 후 ISO 규격에 의거 기계적, 화학적 특성에 관한 시험을 행하였으며, 또한 ISO/TR 규격에 의거 단기간 전신독성시험(경구)과 배양세포에 의한 한천중층시험등 생체적합성 실험을 행한 결과 매우 우수한 생체적합성을 나타내었다. 상기의 시험방법으로 측정된 본 발명합금의 물리적 특성은 항복강도 245 MPa, 인장강도 402 MPa, 연신율 23 %, 비커스경도 137 Hv, 열팽창계수 14.1 x 10-6/℃, 밀도 15.4 g/cm3, 융점 ∼1023 ℃(액상점)의 값을 보였다.The alloy prepared as described above was dissolved using an oxygen-propane gas torch used in the laboratory, and then tested for mechanical and chemical properties according to the ISO standard. Also, a short-term systemic toxicity test based on the ISO / TR standard (oral) The results of biocompatibility tests such as agar stratification test with cultured cells showed very good biocompatibility. Physical properties of the alloy of the present invention measured by the test method described above yield strength 245 MPa, tensile strength 402 MPa, elongation 23%, Vickers hardness 137 Hv, coefficient of thermal expansion 14.1 x 10-6 / ℃, density 15.4 g / cm3, melting point The value of -1023 degreeC (liquid point) was shown.

금속-세라믹용 합금의 경우 세라믹과의 융착성을 조사하기 위해 25×3×0.5 mm의 판재로 합금을 주조한 후 시편중앙에 8×3×1 mm로 세라믹을 올려 소성한 후 세라믹과의 결합특성을 조사하였다. 시험은 ISO 6892 규격에 의거 굽힘강도 시험을 행하였으며, 시험결과 ISO 9693에 의거 6개의 시편중 4개 이상의 시편이 결합 파절/균열생성 강도가 25 MPa 이상으로 우수한 결합력을 보여 주었다.In the case of the metal-ceramic alloy, the alloy is cast from a plate of 25 × 3 × 0.5 mm to investigate the adhesion with the ceramic, and then the ceramic is heated to 8 × 3 × 1 mm in the center of the specimen and then fired. The properties were investigated. The test was conducted on the bending strength test according to the ISO 6892 standard. According to the test results, four or more of the six specimens showed excellent bonding strength of 25 MPa or more.

본 발명은 종래의 치과용 귀금속 합금이 갖고 있는 문제점을 해결하고 고가인 백금(Pt) 및 팔라디움(Pd)의 함량을 줄이고, 대신 이리듐(Ir), 로디움(Rh)을 소량 첨가시켜 가격 경쟁력을 높이고, 기계적 성질을 향상시켰으며, 다량의 팔라디움이 첨가됨으로써 발생하는 잦은 변색물의 발생과 파절, 수소취성, 주조성 저하, 치아 경도보다 더 강한 경도값을 갖는 등의 단점들을 해결하였다. 또한 부식이나 변색등이 없으며, 유독한 성분을 전혀 함유하지 않아 생체적합성이 뛰어났다.The present invention solves the problems of the conventional dental precious metal alloy and reduces the content of expensive platinum (Pt) and palladium (Pd), instead of adding a small amount of iridium (Ir), rhodium (Rh) price competitiveness It improved the mechanical properties, and solved the disadvantages such as frequent discoloration and fracture, hydrogen embrittlement, reduced castability, and stronger hardness than tooth hardness, caused by the addition of a large amount of palladium. In addition, it has no corrosion or discoloration, and contains no toxic components, so it has excellent biocompatibility.

Claims (5)

금, 백금, 팔라디움, 은, 동, 아연, 인듐으로 이루어지는 치과 귀금속 합금에 있어서,In the dental precious metal alloy which consists of gold, platinum, palladium, silver, copper, zinc, and indium, 상기 치과 귀금속합금 100중량% 중에 이리듐(Ir)은 0.07-0.3%, 로디움(Rh)은 0.1-0.35%이 포함되도록 구성되어짐을 특징으로 하는 치과용 귀금속 합금.Iridium (Ir) is 0.07-0.3%, Rhodium (Rh) in the dental precious metal alloy 100% by weight of the dental precious metal alloy, characterized in that it is configured to contain 0.1-0.35%. 제 1항에 있어서, 상기 이리듐(Ir)과 로디움(Rh)은 백금과 팔라디움의 부족분을 대신해서 첨가되도록 구성되어짐을 특징으로 하는 치과용 귀금속 합금.The dental precious metal alloy of claim 1, wherein the iridium (Ir) and rhodium (Rh) are configured to be added in place of the shortage of platinum and palladium. 금, 백금 , 팔라디움, 은, 동, 아연, 인듐, 이리듐, 로디움으로 이루어지는 치과용 귀금속 합금조성물을 진공유도로에 장입하여 10-3 torr 까지 진공분위기를 조성한후 약 50 torr의 불활성가스(아르곤)를 주입하여 용해하고, 용해가 끝난 용탕을 진공상태에서 진공유도로 챔버안에 설치된 정밀 주조용 흑연 주형에 주입하여 열처리하여 압연기를 이용하여 주조체를 늘린 후 각인 및 절단을 하여 최종 제품을 만드는 단계로 이루어지는 치과용 귀금속 합금조성물 제조방법에 있어서, 상기 이리듐(Ir)과 로디움(Rh)의 첨가는 팔라디움(Pd)-이리듐(Ir) 모합금, 팔라디움(Pd)-로디움(Rh) 모합금의 형태로 첨가하여 진공유도로에 투입하도록 함을 특징으로 하는 치과용 귀금속합금의 제조방법Dental precious metal alloy composition consisting of gold, platinum, palladium, silver, copper, zinc, indium, iridium, and rhodium was charged into a vacuum induction furnace to form a vacuum atmosphere up to 10-3 torr, and then an inert gas of about 50 torr (argon). Injecting and dissolving the molten metal, injecting the melted metal into the precision casting graphite mold installed in the chamber under vacuum induction and heat treatment to increase the cast body using a rolling mill, and then stamping and cutting to make the final product. In the method of manufacturing a dental precious metal alloy composition consisting of, the addition of the iridium (Ir) and rhodium (Rh) is a palladium (Pd) -iridium (Ir) mother alloy, palladium (Pd) -rhodium (Rh) mother alloy Method of producing a dental precious metal alloy, characterized in that to add in the form of a vacuum induction 제 3항에 있어서 상기 팔라디움(Pd)-이리듐(Ir) 모합금의 첨가량은 무게비로 팔라디움 92wt%, 이리듐 8wt% 임을 특징으로 하는 치과 귀금속합금의 제조방법.The method of claim 3, wherein the amount of the palladium (Pd) -iridium (Ir) master alloy is 92 wt% of palladium and 8 wt% of iridium by weight. 제 3항에 있어서 상기 팔라디움(Pd)-로디움(Rh) 모합금의 첨가량은 무게비로 팔라디움 90wt%, 로디움 10wt%임을 특징으로 하는 치과 귀금속합금의 제조방법.The method of claim 3, wherein the amount of the palladium (Pd) -rhodium (Rh) mother alloy is 90 wt% of palladium and 10 wt% of rhodium in weight ratio.
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JPS60149741A (en) * 1984-01-17 1985-08-07 G C Dental Ind Corp Dental gold alloy
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