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Promotion And Application Of Nickel-Titanium Memory Alloy In The Medical Industry

wallpapers Industry 2020-09-16

Clinical application of Nitinol wire:

1. It is used for the first alignment and leveling of the patient's dentition. Due to the superelasticity and the shape memory properties of Nitinol archwires and the lower stress-strain curve, Nitinol archwires are routinely included in the treatment system as the initial stage in the clinical practice. In this way, the patient's discomfort will be significantly reduced. Since there are several different straight wire arch correction techniques, the MBT technology recommends using a 0.016-inch heat-activated nickel-titanium alloy archwire (HANT wire), and the DEMON self-locking bracket technology recommends using copper-containing heat-activated nickel-titanium produced by Omro. Alloy archwire (phase transition temperature is about 40 degrees), O-PAK correction technology recommends the use of 0.016 inches superelastic Nitinol archwire for early alignment and leveling.

2. Nitinol springs: Nitinol push springs and extension springs are springs used for orthodontics. They are particularly superelastic and suitable for orthodontic treatment to open up the gap between teeth and pull teeth in different directions. The nickel-titanium coil spring can generate a force of about 50g when extended by 1mm. The Nickel-titanium coil springs have high elastic properties and can produce a softer and stable continuous pressure under tension. The force's attenuation is minimal, and it can make the ideal orthodontic force required for clinically moving teeth. Meet the physiological requirements. Nitinol wire tension springs have high elasticity and a low permanent deformation rate. Compared with the stainless steel wires of the same diameter, the released corrective force is 3.5-4 times different. Therefore, in orthodontic treatment, the patient has dull pain and feels soft and lasting. The follow-up time is reduced, the treatment course is shortened, and the curative effect is improved. It is a new excellent mechanical device in the orthodontic treatment.

3. The L-H archwire is researched and developed by Dr. Soma in Japan and produced by Tomy. "LH" is named "LowHysteresis", that is to say, when the archwire is ligated to the bracket, the stress generated when the archwire is activated. The pressure is generated when the archwire is slowly restored to its original shape when the tooth is moved. The gap is minimal. That is, the hysteresis is small. SOMA et al. compared the stress-strain curves of LH archwires and other Nitinol wires. The hysteresis range of LH archwires is the smallest. This feature makes the archwires have the advantages of low load and continuous light force. At the same time, the initial slope of the curve is downward. It shows that the archwire's stiffness is low, and the hysteresis curves of other types of Nitinol archwires show that the stiffness is relatively large.


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