What is Nitinol Alloy?
Nitinol is a shape memory alloy, which is a special alloy that can automatically restore its plastic deformation to its original shape at a certain temperature, and has good plasticity.
Its expansion rate is over 20%, its fatigue life is up to 1*10 to the 7th power, its damping characteristics are 10 times higher than that of ordinary springs, and its corrosion resistance is better than the best medical stainless steel at present, so it can meet various engineering and It is an excellent functional material for medical application requirements. In addition to its unique shape memory function, memory alloy also has excellent characteristics such as wear resistance, corrosion resistance, high damping and super elasticity.
Special properties of Nitinol Alloy：
Gentle orthodontic power: currently commercially used orthopedic wires include austenitic stainless steel wires, cobalt-chromium-nickel alloy wires, nickel-chromium alloy wires, Australian alloy wires, gold alloy wires and ß titanium alloy wires. Regarding the load-displacement curves of these orthodontic wires in tensile test and three-point bending test conditions. The unloading curve platform of Nitinol is the lowest and the flattest, indicating that it can provide the most durable and soft correction force.
Good shock absorption characteristics: The greater the vibration caused by chewing and night molars to the arch wire, the greater the damage to the root and periodontal tissue. Through the results of different arch wire attenuation experiments, it is found that the vibration amplitude of stainless steel wire is larger than that of super-elastic Ni-Ti wire. The initial vibration amplitude of super-elastic Ni-Ti arch wire is only half of that of stainless steel wire. The good vibration and shock absorption characteristics of arch wire are The health of teeth is very important, and traditional arch wires, such as stainless steel wires, tend to increase root resorption.
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