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It is made of shape memory alloy. This is a special metal alloy that, at a given temperature, can return to its original plastic deformation.
Memory alloys have outstanding characteristics, including wear resistance and corrosion resistance. They also offer high damping properties, super elasticity, and are resistant to wear.
What is Nitinol Performance?
The name implies that nickel-titanium powder is a binary metal powder consisting of nickel and titanium. The austenite phase, and the martensite phases are different due to changes in temperature or mechanical pressure. The order of phase transformations during nickel-titanium alloy cooldown is parent phase – R phase – martensite. The R phase has a rhombohedral shape, while the austenite cubes become hard and brittle when temperatures are high or when a load is removed. The shape of the material is relatively stable. The martensite is the state of a material at relatively low temperatures, or under loads. It is hexagonal, repeatable and unstable.
What are the special properties of Nitinol?
Shape memory occurs when a parent phase is cooled to below Mf from above Af. This martensite phase is then deformed and heated back to Af. The material will automatically revert to its parent phase.
The term superelasticity describes the phenomenon in which a sample is strained beyond its elastic limit strain when subjected to external forces, but the strain automatically returns after the force has been removed.
Sensitivity of orthodontic wires to temperature changes: The orthodontic power and strength of CoCr orthopedic wires is not significantly affected by temperature.
According to recent studies, the corrosion resistance between stainless steel and nickel-titanium is almost identical.
Nitinol has a special composition. This is because it is an atomic-alloy, like Nitinol. Nitinol contains about 50% nickel. Nickel has been known to be carcinogenic, and can promote cancer.
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 nickel-titanium alloy wires.
Good shock-absorbing characteristics: The greater vibrations of the archwire due to chewing or night molars will cause more damage to the roots and periodontal tissues.
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