Nickel-titanium alloy gradient flexible root canal file and manufacturing method thereof

A technology of nickel-titanium alloy and manufacturing method, which is applied in the direction of manufacturing tools, adding protective layers, furnace types, etc., can solve the problems of difficulty, low strength, poor machinability, etc., and achieves improved usability, good machinability, and high resistance. The effect of fatigue fracture performance

Inactive Publication Date: 2016-08-17
SHENZHEN SUPERLINE TECH
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  • Abstract
  • Description
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Problems solved by technology

However, because the internal structure of this type of root canal file is hot martensite, or a mixture of hot martensite and austenite, the strength is low and the cutting ability is also poor, especially for the middle and upper parts of the root canal. It is extremely difficult to remove a large amount of parts

Method used

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  • Nickel-titanium alloy gradient flexible root canal file and manufacturing method thereof
  • Nickel-titanium alloy gradient flexible root canal file and manufacturing method thereof
  • Nickel-titanium alloy gradient flexible root canal file and manufacturing method thereof

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0043] The invention proposes a nickel-titanium alloy gradient flexible root canal file and a manufacturing method thereof, which fundamentally improves the deficiencies of existing nickel-titanium alloy root canal files, so as to greatly improve the usability, safety and service life of the root canal file.

[0044] The phase transition temperature of nickel-titanium alloy can be controlled and adjusted by various means. Cold deformation has a certain influence on the phase transition temperature of nickel-titanium alloy. After the alloy is cold deformed, a large number of crystal defects such as dislocations will be generated in the structure, resulting in an increase in the strength of the alloy, and an increase in the phase transition resistance between martensite and austenite in the alloy, making it difficult for the phase transition of t...

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Abstract

The invention provides a nickel-titanium alloy gradient flexible root canal file. The nickel-titanium alloy gradient flexible root canal file comprises a working portion, a handle portion and a positioning ring, the working portion is connected with the handle portion, the working portion comprises a tip section, a transition section and a root section close to the handle portion, the positioning ring is arranged on the root section of the working portion, and the martensite-to-austenite phase transition finishing temperature Af of all points on the nickel-titanium alloy gradient flexible root canal file gradually reduces from the tip of the tip section to the root section along the length direction of the nickel-titanium alloy gradient flexible root canal file. The invention also provides a manufacturing method of the nickel-titanium alloy gradient flexible root canal file. The nickel-titanium alloy gradient flexible root canal file has good cutting ability, good flexibility and high fatigue fracture resistance, and can fundamentally solve the disadvantages of present nickel-titanium alloy root canal files in order to greatly improve the usability, the safety and the life of the root canal files.

Description

technical field [0001] The invention relates to a root canal file, in particular to a nickel-titanium alloy gradient flexible root canal file and a manufacturing method thereof. Background technique [0002] Root canal therapy is currently an ideal and mature treatment for various pulpitis, pulp necrosis, gangrene, tooth fracture and other diseases. The root canal file is the main instrument used to thoroughly clean the inside of the diseased root canal and the wall of the root canal, remove the diseased tissue, and shape a complete and smooth root canal lumen. [0003] The structure of the root canal file is composed of the working part 1, the handle part 2 and the positioning ring 3. The working part has a certain cross-sectional shape, the outer contour has a certain taper, and there are threads distributed on it. The threads have a certain helix angle φ, such as figure 1 shown. [0004] When the root canal file instrument is working, it rotates in the root canal 4 at a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C5/02C22F1/10C21D9/00
CPCC22C30/02C22F1/10C21D9/00
Inventor 王中
Owner SHENZHEN SUPERLINE TECH
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