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Clinical application of nickel-titanium alloy wire

Clinical application of nickel-titanium alloy wire

  • Categories:Industry News
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  • Time of issue:2020-02-25

Clinical application of nickel-titanium alloy wire

(Summary description)Early arrangement of patient dentition: Nitinol archwires are often used as the initial archwires in orthodontic systems due to the superelasticity and shape memory characteristics of the nickel-titanium archwires, and the low stress-strain curve. . I will greatly reduce. As there are several different straight wire correction technologies, MBT technology recommends using 0.016-inch heat-activated nickel-titanium arch wire (HANT wire), and DEMON self-locking bracket technology recommends using copper-containing heat-activated nickel-titanium arch wire. Wire (transition temperature is about 40 degrees), O-PAK technology recommends using a 0.016-inch superelastic nickel-titanium alloy arch wire for early alignment.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-02-25
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1. Early alignment of patient dentition: Nitinol archwires are often used as the initial archwires in orthodontic systems due to the superelasticity and shape memory characteristics of Nitinol archwires and low stress-strain curves, which reduces the patient's discomfort . I will greatly reduce. As there are several different straight wire correction technologies, MBT technology recommends using 0.016-inch heat-activated nickel-titanium arch wire (HANT wire), and DEMON self-locking bracket technology recommends using copper-containing heat-activated nickel-titanium arch wire. Wire (transition temperature of about 40 degrees), O-PAK technology recommends using a 0.016-inch super-elastic nickel-titanium alloy arch wire for early alignment. Leveling.

2. Niti spring: Niti push spring and extension spring are springs used in orthodontics. With the characteristics of nickel-titanium superelasticity, it is suitable for opening interdental gaps and extracting teeth in different directions. Nitinol coil springs have an extension of 1 millimeter and can produce a force of about 50 grams. Nitinol coil springs have high elastic properties and can produce relatively soft and stable endurance under the action of tension. The attenuation of the force is small, which can provide ideal orthodontic force for clinical tooth movement. Meet physiological requirements. Compared with the stainless steel wire of the same diameter, the nickel-titanium wire spring has high elasticity and a low permanent deformation rate, and the correction force released is 3.5-4 times smaller than that of the stainless steel wire of the same diameter. Therefore, in the application of orthodontic treatment, patients not only have mild pain, soft and durable feeling, but also reduce the review time, shorten the treatment process, and improve the efficacy. It is a new type of excellent orthodontic treatment mechanical device.

3. L-H bow wire is developed by Japan Soma Company and produced by Tommy Company. "lh" is called "low hysteresis". That is, when the arch line is tied to the bracket, the difference between the stress generated when the arch line is activated and the stress generated when the arch line slowly returns to the initial state is very small. That is to say, the hysteresis is very small. Soma et al compared the stress-strain curves of lh arch wires with other nickel-titanium alloy wires. The hysteresis range of the LH arch wire is the smallest. This feature makes the arch wire have the advantages of low load and light stress. At the same time, the initial slope of the curve is low, indicating that the stiffness of the arch line is low. The hysteresis curves of other types of nickel-titanium alloy arch wires indicate that their stiffness is greater. Obviously, the reason for the LH arch wire is the nickel-titanium component of the left-hand arch wire. The ratio of middle titanium is higher than that of ordinary nickel-titanium arch wire, which is called titanium-nickel arch wire, and its shock absorption effect has been proved by experiments. Another feature of left-handed nickel-titanium wire is that it can be bent and heat-treated by an instrument. Therefore, The left-handed nickel-titanium wire can also complete the treatment, from alignment, opening occlusion to closed gap, and finally complete the stage. As long as the arch line is taken out of the required shape at each stage, it can be formed by a heat treatment instrument and added Hardness. Yes. At present, LH archwires are used to correct mandibular opening, deflection, and jaw resistance in clinical practice. Because of its continuous stability, soft strength, and better results, J-shaped hooks are often used to improve the weakness of archwires. Although the MEAW technology has an ideal effect in correcting the wrong occlusion, the complex arch wire bending often makes many doctors hesitate. Therefore, some doctors use a rocking chair type nickel-titanium arch wire similar to the mechanical system of vertical traction of the front teeth. Although this has a similar effect, they always feel that compared to molars, each individual tooth movement is not as good as molar technology, because the rocking chair type nickel-titanium arch wire is a continuous arch wire and there is no way to bend. Therefore, The angle of the bracket connection and the curvature of the rocking chair determine the angle of each tooth. Unlike the traditional MEAW technology, the angle of each tooth has a more independent adjustment space. The left-hand nickel-titanium bending rocking chair is used, and then the arch wire forming machine is used. Curving back and forth in the mouth, the effect is quite satisfactory.

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