Dental alloy for machining by cad/cam system
a technology of dental alloys and cam systems, applied in the field of dental alloys, can solve the problems of increasing economic burdens on practitioners and patients, unfavorable cost, and high cost of raw materials for dental alloys, and achieve the effect of reducing cost and achieving equivalent processibility
Inactive Publication Date: 2012-08-16
CERAGEM BIOSYS
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
The present invention relates to a dental alloy for machining by a CAD / CAM system, which is advantageous in terms of manufacturing cost and processability, and can produce precise prostheses while maintaining the necessary properties of conventional dental alloys such as corrosion resistance, discoloration resistance, and biocompatibility. The technical effect of this invention is to provide a dental alloy that can decrease manufacturing costs and simplify the manufacturing process compared to conventional dental alloys, while maintaining the necessary properties for dental purposes.
Problems solved by technology
Furthermore, such alloys have color and gloss that only gold has, and do not cause wear of antagonist tooth, but are unfavorably expensive because of the use of gold and platinum group elements as main components.
However, the price of raw materials for dental alloys, in particular, the price of gold, has been reaching new records in the world market day after day since 2005.
Thus, because the price of dental precious metal alloys increases in proportion to an increase in the price of raw materials, economic burdens may be increasingly imposed on practitioners and patients.
Also, a dental prosthesis is generally manufactured using typical precise casting through manual work in dental labs, but this work is disadvantageous in terms of complicated processes and high personnel expenses.
Furthermore, casting defects may occur, and casting shrinkage may be caused because of disharmony with materials for wax patterns and casting molds, such as wax, investments.
Particularly in the case of manufacturing implant suprastructures, the size of restorations is comparatively larger than on natural teeth, and thus the cast product may be thick and a large amount of metal may be consumed.
Thus, in the course of uniformly melting a large amount of metal, the metal may be easily overheated, and defects such as small holes that cause discoloration and corrosion on the thick portion or surface of the cast product may be generated, undesirably hindering the formation of uniform cast products.
However, in the case of a ceramic material such as zirconia, it may be broken due to brittleness during machining.
Also, because this material is processed in a semi-sintered state and then completely sintered to manufacture a dental prosthesis, compatibility may undesirably decrease attributable to shrinkage of the material.
Method used
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first embodiment
[0028]According to the present invention, a dental alloy for machining by a CAD / CAM system may comprise 0.1-5.0 wt % of gold (Au), 0-5.0 wt % of platinum (Pt), 30-50 wt % of palladium (Pd), 25-50 wt % of indium (In), 10-40 wt % of silver (Ag), and 0.1-0.3 wt % of iridium (Ir), and may be used to manufacture a variety of fixed restorations and implant suprastructures.
second embodiment
[0029]According to the present invention, a dental alloy for machining by a CAD / CAM system may comprise 0.1-5.0 wt % of gold (Au), 0-5.0 wt % of platinum (Pt), 30-50 wt % of palladium (Pd), 25-50 wt % of indium (In), 10-40 wt % of silver (Ag), 0.1-0.3 wt % of iridium (Ir), and 0.01-2.5 wt % of zinc (Zn), and may be used to manufacture a variety of fixed restorations and implant suprastructures.
third embodiment
[0030]According to the present invention, a dental alloy for machining by a CAD / CAM system may comprise 0.1-5.0 wt % of gold (Au), 0-5.0 wt % of platinum (Pt), 30-50 wt % of palladium (Pd), 25-50 wt % of indium (In), 10-40 wt % of silver (Ag), 0.1-0.3 wt % of iridium (Ir), and 0.1-1.0 wt % of cobalt (Co), and may be used to manufacture a variety of fixed restorations and implant suprastructures.
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Abstract
The present invention relates to a dental alloy for machining by a CAD / CAM system. In particular, the dental alloy for machining by a CAD / CAM system features a minimum usage of expensive gold and platinum by comprising gold (Au) in an amount of between 0.1% and 5.0% by weight and platinum (Pt) in an amount of between 0% and 5.0% by weight, in addition to palladium (Pd) in an amount of between 30% and 50% by weight, indium (In) in an amount of between 25% and 50% by weight, silver (Ag) in an amount of between 10% and 40% by weight and iridium (Ir) in an amount of between 0.1% and 0.3% by weight. Accordingly, compared with a conventional dental casting alloy composed of gold in an amount of between 40% and 99% the dental alloy for machining by a CAD / CAM system of the invention can be provided at a lower manufacturing cost, while offering processability equivalent to that of zirconia that can be machined by a conventional CAD / CAM system.
Description
TECHNICAL FIELD[0001]The present invention relates to a dental alloy, and more particularly to a dental alloy for machining by a CAD / CAM system, which is advantageous because of lower manufacturing cost and superior machinability, unlike conventional dental alloys for casting.BACKGROUND ART[0002]Dental alloys used in the field of dental prosthetics may be classified as precious metal alloys and non-precious metal alloys, depending on the components thereof, and may also be classified as alloys for casting and for metal-ceramics depending on the end uses thereof. Among these, precious metal alloys composed mainly of gold are chemically stable in terms of corrosion resistance, discoloration resistance, etc., in the mouth, and have high cast compatibility. Furthermore, such alloys have color and gloss that only gold has, and do not cause wear of antagonist tooth, but are unfavorably expensive because of the use of gold and platinum group elements as main components.[0003]On the other h...
Claims
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IPC IPC(8): C22C28/00
CPCA61C13/0004A61L2430/12A61L27/04A61C13/08
Inventor PARK, KYEONG-JUNPARK, JEONG-JONGCHO, SUN-WOOK
Owner CERAGEM BIOSYS