A type of biometallic material used to repair tooth defects, dentition loss, and orthodontics. There are several classification methods for dental metal materials. According to metal classification, it can be divided into: precious metal materials and non-precious metal materials; classified according to process and use: casting materials, forging materials, metal and ceramic sintered composite materials, filling materials and brazing materials; according to the melting point classification can be divided into: High melting point metal material, medium melting point metal material and low melting point metal material. Dental metal materials are placed in the mouth for a long time, chewing, touching human tissues and body fluids, and various acidic and alkaline foods. Therefore, the material must be non-toxic and harmless, have corrosion resistance and anti-tarnishing properties, have certain strength and wear resistance, adapt to soft and hard tissues in the oral cavity, have beautiful color, and are easy to process and use.
The first metal material used in dentistry was gold. The use of gold wire to fix loose or broken teeth has been more than 2,500 years old. In the 16th century, gold foil was used to fill the teeth. In the 19th century, the cavity was filled with gold foil or gold amalgam and the crown was made of gold. In the late 1920s, cobalt chrome molybdenum alloy (Vitallium) was used. In the 1940s, stainless steel was used instead of gold to make dental metal materials. Titanium and titanium alloys are new dental metal materials developed in the 1960s.
Gold and its alloys have the comprehensive properties required for excellent dental metal materials. Can be used to make filling materials, crowns, bridges, dentures, etc. Although it is expensive, it has good performance, beautiful color and wide application. Among the gold alloys, gold-silver-copper alloys are widely used and have a long history.
Silver and its alloys are also widely used dental metal materials. Silver can be used as a denture. Among silver alloys, silver tin amalgam is a typical filling material and has a long history of use. The processing and casting properties of silver-tin-copper alloy containing 43-60% of silver are very good. Although its corrosion resistance is not as good as that of gold-based alloys, it is prone to discoloration and tarnishing in the mouth, but it is inexpensive and can be used as crowns, bridges and mosaics.
The palladium-based alloy is white, has a high melting point, is easy to inhale, and has a lower casting performance than a gold-based alloy, but is inexpensive and can be used as a substitute for a gold-based alloy. The expansion coefficient of palladium-based alloy is matched with ceramics, and it is used as the matrix of ceramic sintered alloy, and its performance is better than that of gold-based alloy. Palladium-based alloys are widely used in palladium-based alloys. If copper, tin and other elements are added, the properties of the alloy can be improved.
Non-precious metal alloys are used in a large amount of cobalt chromium molybdenum alloy and nickel chromium alloy, stainless steel and titanium alloy. Cobalt-chromium-molybdenum alloy (Co-30Cr-6Mo-0.35C) and nickel-chromium alloy have higher hardness, difficult processing and poor casting performance compared with gold-based alloy, but light weight, high strength, excellent wear resistance and corrosion resistance. Good sex. Like stainless steel, crowns, bridges, buckles, hooks, orthopedic lip arches, and nails can be made. Titanium alloy is light in weight, excellent in corrosion resistance, and has better compatibility with other alloys than other alloys. Its price is lower than that of precious metals; it can make crowns, bridges and various dental implants (teeth and jaw). Commonly used dental titanium alloys are Ti-2Ag-2Fe, Ti-6Al-1Fe. Ti-50Ni memory alloy, good resilience, used to make the aligner better than stainless steel, is a high-performance orthodontic wire.
Metal-ceramic sintered composites A layer of ceramic is sintered on the surface of the metal repair matrix to provide both the strength of the metal and the aesthetics of the ceramic. Due to the complicated process and high price of this material, it is generally limited to the patchwork of the front teeth with higher aesthetic requirements. Base metals are commonly used in precious metal alloys, mainly gold-based alloys containing 72-80% gold, 21-16% palladium and 4-11% platinum to ensure the bonding properties of the composite.
- Chemical composition
Specification Metal No: Chemical Composition(W%) C Si Cr Mo Mn Fe Cu Ti Al Ni Dental Alloy
Co121YMZ ≤0.08 2.3-2.7 28.0-32.0 5.0-5.3 0.3-1.0 / / / / / Dental Alloy
Co121M1 0.26-0.30 0.30-0.65 27.00-30.00 5.00-7.00 ≤0.50 ≤0.50 / ≤0.10 ≤0.10 ≤0.50 Dental Alloy
Co121M1 0.26-0.30 0.30-0.65 27.00-30.00 5.00-7.00 ≤0.50 ≤0.20 / ≤0.10 ≤0.10 ≤0.50 Dental Alloy F75
Co121YZ ≤0.35 ≤1.00 26.50-30.00 4.50-7.00 ≤1.00 ≤1.00 / / / ≤1.00 Specification Metal
Chemical Composition(W%) C Si Cr Mo Mn Fe Cu Ti Al Ni Dental Alloy
Ni 291 ≤0.01 / 12.10-13.10 4.50-5.50 / / / 0.28-0.65 2.40-3.40 Bal Dental Alloy 7/16”*1/4”(11.113×6.350mm) Ni292 / 2.0-3.0 4.25-5.25 / 0.25-0.75 0.25-0.75 11.0-12.0 / / Bal Dental Alloy
Ni293 / 1.30-1.90 13.80-15.20 / 18.60-20.4 0.05-0.40 9.00-10.00 / 1.30-1.90 Bal
Eternal Bliss Alloy Casting & Forging Co, Ltd.
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