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Preparation method of nickel-titanium alloy flexible and elastic root canal file

A nickel-titanium alloy and root canal file technology, applied in the field of medical devices, can solve the problems of prolonged cutting time, side penetration of curved root canals, straightening, etc., to meet hardness and fatigue life, improve fatigue resistance, and ensure cutting ability. Effect

Pending Publication Date: 2018-11-13
深圳市葆丰医疗器械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. When the rigidity of the ultra-elastic root canal file is high, it is easy to make the bent root canal sideways and straighten during use; it is easy to cause the root canal file to break during use, and it is easy to damage the patient's tooth when the root canal file breaks. Nerves, broken root canal files are not easy to remove and increase the patient's pain
[0004] 2. The cutting ability of the deformed pre-curved file is weaker than that of the super-elastic root canal file, and the cutting time is longer, so the treatment time needs to be extended, and the experience of doctors and patients is poor.

Method used

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  • Preparation method of nickel-titanium alloy flexible and elastic root canal file
  • Preparation method of nickel-titanium alloy flexible and elastic root canal file
  • Preparation method of nickel-titanium alloy flexible and elastic root canal file

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preparation example Construction

[0022] The invention provides a method for preparing a nickel-titanium alloy flexible and elastic root canal file. figure 1 It is the flow chart of the preparation method of nickel-titanium alloy flexible and elastic root canal file of the present invention, combined below figure 1 The method is described in detail, specifically including the following steps:

[0023] S10. Selecting a nickel-titanium alloy wire with a preset diameter and a preset length.

[0024] Wherein, the preset diameter and the preset length are respectively determined according to the external dimensions of the root canal file to be processed and formed, such as the length and the maximum diameter, and the corresponding preset length and preset diameter of the root canal files of different lengths and different maximum diameters are different, Usually, a preset diameter of 1.2mm, 1.0mm or 0.8mm is used; the preset length is at least greater than the length of the root canal file.

[0025] The atomic pe...

Embodiment 1

[0036] S110. Select a nickel-titanium alloy wire with a diameter of 1.2 mm, a length of 2.5 m, a titanium atomic percentage of 5%-15% and a nickel atomic percentage of 50%-60%.

[0037] S120, processing the nickel-titanium alloy wires selected in S110 with a numerical control machine tool to obtain several mechanically processed nickel-titanium alloy flexible and elastic root canal files.

[0038] When the nickel-titanium alloy wires selected by S110 are processed by CNC machine tools, several mechanically processed nickel-titanium alloy flexible and elastic root canal files can be obtained. The number of processed root canal files is determined according to the length of the processed and formed root canal files.

[0039] S130 , polishing the surface of the mechanically formed nickel-titanium alloy flexible and elastic root canal file obtained in S120 .

[0040] S140. The polished nickel-titanium alloy flexible and elastic root canal file obtained in S130 is kept warm in a ho...

Embodiment 2

[0045] The differences between this embodiment and the heat treatment conditions of the first embodiment are: the heat treatment temperature is 500° C., the holding time is 50 minutes, and other test conditions are the same as the first embodiment.

[0046] The hardness of the nickel-titanium alloy flexible and elastic root canal file obtained by the above heat treatment conditions is HV440, the fatigue life when the fatigue resistance is tested by a rotary testing machine is 55 seconds, and the color is light blue, the nickel-titanium alloy flexible and elastic root canal file Compared with the size before heat treatment, the size is basically unchanged, and the stiffness of the nitinol flexible root canal file is slightly reduced.

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Abstract

The invention relates to the field of medical apparatuses and in particular discloses a preparation method of a nickel-titanium alloy flexible and elastic root canal file. The preparation method comprises the following steps: machining a nickel-titanium alloy wire rod at a preset length to obtain a machined and formed nickel-titanium alloy flexible and elastic root canal file; polishing the surface of the machined and formed nickel-titanium alloy flexible and elastic root canal file; and thermally processing the polished nickel-titanium alloy flexible and elastic root canal file. By adopting the preparation method of the nickel-titanium alloy flexible and elastic root canal file, the rigidity of the root canal file is stable, the hardness and the fatigue life meet the using demands, the side penetrating and straightening frequency on a bent root canal by using the nickel-titanium alloy flexible and elastic file is reduced greatly, the fatigue resistance is improved on the premise of guaranteeing the cutting ability, and the treatment time is shortened; moreover, the temperature and time of thermal treatment can be adjusted properly according to color demands of root canal file products.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a preparation method of a nickel-titanium alloy flexible and elastic root canal file. Background technique [0002] Existing root canal files include ultra-elastic root canal files and deformed files, but the following technical problems exist in the process of treating teeth with super-elastic root canal files and deformed pre-bent files: [0003] 1. When the rigidity of the ultra-elastic root canal file is high, it is easy to make the bent root canal sideways and straighten during use; it is easy to cause the root canal file to break during use, and it is easy to damage the patient's tooth when the root canal file breaks. Nerves, root canal files broken inside are not easy to remove and increase the pain of the patient. . [0004] 2. The cutting ability of the deformed pre-bent file is weaker than that of the super-elastic root canal file, and the cutting time is longer, wh...

Claims

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Application Information

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IPC IPC(8): B23P15/00A61C5/42C21D9/00C22F1/10
CPCA61C5/42C21D9/0068C22F1/10B23P15/00
Inventor 周家琪
Owner 深圳市葆丰医疗器械有限公司
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