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Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof

A nickel-titanium alloy, ultra-fine grain technology, applied in the direction of tooth nerve/root treatment tools, protective layer, medical science, etc., can solve problems such as poor cutting efficiency of nickel-titanium root canal files, and achieve good hardness and wear resistance. Effect

Inactive Publication Date: 2012-10-24
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem of poor cutting efficiency of the existing nickel-titanium root canal file, and to provide a superfine-grained nickel-titanium alloy root canal file and its preparation method

Method used

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  • Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof
  • Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof
  • Ultra-fine grained nickel-titanium alloy root canal file and preparation method thereof

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specific Embodiment approach 1

[0025] Embodiment 1: In this embodiment, the ultrafine-grain nickel-titanium alloy root canal file is made of ultrafine-grain nickel-titanium alloy with a particle size of 200nm-300nm.

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the ultra-fine-grain nickel-titanium alloy root canal file is made of ultra-fine-grain nickel-titanium alloy with a particle size of 260 nm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the preparation method of the ultrafine-grain nickel-titanium alloy root canal file in this embodiment is as follows:

[0028] 1. Nickel-titanium alloy ultra-fine grain treatment: Cut the nickel-titanium alloy ingot with a Ti atomic percentage of 48-52% into a round rod with a diameter of 20mm and a length of 100mm, and then use the method of equal diameter angular extrusion to The round rods pass through the mold with two channels with angles of 90° and 120° respectively, and are extruded for 4-8 passes at 400-500°C, and then kept at 300-500°C for 30-60min to obtain ultra-fine grains. Nitinol rods;

[0029] 2. The preparation method of ultra-fine-grained nickel-titanium alloy wire: the ultra-fine-grained nickel-titanium alloy rod is used as lubricant with graphite emulsion, and the heating temperature is 600-700°C, the line speed is 15-25m / s, every Under the condition that the pass reduction is 0.04-0.01mm, the ultra-fine-grained nickel-tita...

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Abstract

The invention discloses an ultra-fine grained nickel-titanium alloy root canal file and a preparation method thereof, relating to a root canal file and a preparation method thereof and aiming to solve the technical problems of low cutting efficiency and high probability of breakage in a curved root canal of the conventional nickel-titanium root canal file. The ultra-fine grained nickel-titanium alloy root canal file is prepared from ultra-fine grained nickel-titanium alloy with particle size of 200-300 nm. The preparation method comprises the following steps of: 1, performing ultra-fine graining treatment on the nickel-titanium alloy; 2, preparing an ultra-fine grained nickel-titanium alloy wire; 3, machining and performing surface treatment on a cutting edge of the root canal file; and 4, thermally treating the ultra-fine grained nickel-titanium alloy root canal file. The phase composition of the ultra-fine grained nickel-titanium root canal file consists of martensite and austenite at room temperature; the diffraction peak is obviously widened because of grain refinement, and the ultra-fine grained nickel-titanium root canal file is austenite at application temperature; the prepared ultra-fine grained nickel-titanium alloy root canal file has good hardness and wear resistance; and the cutting efficiency during clinical use is obviously improved.

Description

technical field [0001] The invention relates to a root canal file and a preparation method thereof. Background technique [0002] Dental root canal files are one of the most frequently used instruments in dental clinics, mainly used for the preparation and shaping of tooth root canals. According to the material of root canal files, it can be divided into stainless steel root canal files and nickel titanium root canal files. Due to the high rigidity of stainless steel, it is not easy to bend, and the amount of elastic deformation is small. In the process of root canal treatment, especially in the preparation of curved root canals, the stainless steel root canal file is often plastically deformed, causing accidental fracture or penetration of the dental pulp during the treatment process. cavity, causing great pain to the patient. In comparison, the nickel-titanium root canal file has the advantages of good flexibility and high elasticity. The root canal deviation caused by t...

Claims

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Application Information

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IPC IPC(8): A61C5/02C22F1/00C22F1/18C22F1/10A61C5/42
CPCA61C5/023C22F1/18A61C5/02C22F1/00C22F1/10A61C2201/007A61C5/42C22C14/00C22C19/03
Inventor 郑玉峰周惠敏李莉佟运祥
Owner HARBIN ENG UNIV
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