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Production technology of novel copper-nickel-titanium orthodontic arch wire

A preparation process and dental arch wire technology, which is applied in the field of production and preparation of new copper-nickel-titanium dental arch wires, can solve the problem of low recovery rate of nickel-titanium alloy dental arch wires, increased doctor's chair-side working time, and initial loading Large force value and other problems, to achieve the effect of wide action range, lower loading force value, and lower frequency of wire replacement

Inactive Publication Date: 2015-07-01
INNOVATIVE MATERIAL & DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these two wires have their own defects in clinical application: one, the shape recovery rate of nickel-titanium alloy dental arch wire is low in the orthopedic process and moves with the teeth (such as Figure 1 Teeth 14) The orthopedic force provided by the dental arch wires to the teeth is gradually attenuated, requiring doctors to frequently exchange for new dental arch wires to achieve the purpose of orthodontics
2. For superelastic dental arch wires, the initial loading force is relatively large, and it is not easy to install into the bracket, which increases the doctor's chair-side working time, and the unloading force is also relatively large, which will cause greater damage to the teeth and easily relapse
3. For heat-activated dental floss, it needs to be cooled before operation to make it softer and easier to enter the groove. The operation is more cumbersome and the orthopedic force is smaller and decays faster

Method used

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  • Production technology of novel copper-nickel-titanium orthodontic arch wire
  • Production technology of novel copper-nickel-titanium orthodontic arch wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Preparation of materials, the composition is Ni49.7%, Cu5.5%, Cr0.2%, and the balance is titanium.

[0016] 2. Wire drawing, the original wire diameter of the material is 1.2mm, and it is drawn to 0.41mm. The specific process is hot drawing-straightening-peeling-polishing-annealing-hot drawing-cold drawing-straightening-peeling-polishing, of which hot drawing The temperature is 720°C, straightened after four heat-drawings, the straightening temperature is 420°C, and the acid ratio for peeling is HF:HNO 3 :H 2 O=1:10:20, the annealing temperature is 750°C, and after two hot drawing and one cold drawing, the cold drawing deformation is 44.7%.

[0017] 3. Aging treatment. Adjust the temperature controller of the box-type resistance furnace to 530°C. After the temperature is stable, put the prefabricated dental arch wire into the furnace, adjust the holding time for 28 minutes, and take out the dental arch wire wrapped around it after the alarm sounds. The silk mold is...

Embodiment 2

[0020] The difference between this embodiment and the first embodiment is that the selected material composition is Ni48.2%, Cu6.5%, Cr0.7%, and the balance is titanium. The remaining steps and parameters are the same as in Embodiment 1.

Embodiment 3

[0022] The difference between this embodiment and Example 1 is that the heating method is different, and what selects in step 3 is a nitrate salt bath heating furnace. The remaining steps and parameters are the same as in Embodiment 1.

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Abstract

The invention provides a production technology of novel copper- nickel-titanium orthodontic arch wire aiming at the problems that with further development and improvement of orthodontics systems, requirement on orthodontic products is higher gradually, and the traditional stainless steel orthodontic arch wire and nickel-titanium alloy orthodontic arch wire both cannot meet the requirement on clinical operation and therapeutic effect well due to respective certain defects. The orthodontic arch wire has special mechanical property and characteristics, and can be used for solving the detects of the traditional orthodontic arch wires well. Basic production process of the copper-nickel-titanium orthodontic arch wire comprises the steps of: 1. carrying out wire drawing, namely carrying out hot drawing and cold drawing, wherein hot drawing temperature is 650-720 DEG C, and cold deformation after cold drawing is controlled to be 45%+ / -5%; 2. carrying out aging treatment, specifically, placing a preformed orthodontic arch wire into a holding furnace, keeping the temperature to be 480-600 DEG C, preserving heat for 0.5-3.5h, and cooling the orthodontic arch wire with water after being discharged; and 3. carrying out surface treatment, specifically, carrying out acid pickling, polishing and other processing on the orthodontic arch wire subjected to the aging treatment.

Description

technical field [0001] The invention relates to a production and preparation process of a novel copper-nickel-titanium dental arch wire in the orthodontic industry. technical background [0002] Nickel-titanium alloy materials have been more comprehensively developed and applied since they were discovered by the U.S. Naval Ordnance Research Office in 1963. However, nickel-titanium alloy materials were not officially used for orthodontics until 1977 by 3M Unitek in the United States. Due to its unique superelasticity and Shape memory properties have grown rapidly in the medical device industry over the next 40 years or so. [0003] The application of nickel-titanium alloy in the orthodontic industry is mainly to make orthodontic arch wires, including superelastic arch wires and heat-activated arch wires. The superelastic arch wire is characterized by excellent resilience at room temperature, and can provide continuous force to the teeth during the orthodontic process. The he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04C22C19/03C22C14/00C22F1/10C22F1/18A61C7/20
CPCB21C37/047A61C7/20C22C14/00C22C19/03C22C19/058C22C30/00C22C30/02C22F1/10C22F1/18
Inventor 龙小平
Owner INNOVATIVE MATERIAL & DEVICES
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