What is the difference between superelastic and shape memory nitinol?
Superelastic Nitinol alloys are mainly used in the biomedical field to manufacture medical devices, such as orthodontic arch wires. Its super-elasticity allows for continuous gentle and steady correction in the oral environment, effectively moving the teeth. At the same time, this super elasticity makes it able to withstand large deformation without breaking, improving the durability of the instrument.
Shape memory Nitinol alloys are commonly used in vascular stents. When the stent is placed in the blood vessel, it can be restored to its pre-designed shape by temperature changes, thus prolonging the blood vessel and keeping it open. This shape recovery feature allows the stent to better fit the lining of the blood vessel and perform specific functions through shape changes when needed.