Nickel titanium alloy gradient flexible root canal file and making method thereof

A technology of nickel-titanium alloy and manufacturing method, which is applied in the direction of protective layer, dental prosthetics, surgery, etc., and can solve the problem of low cutting efficiency of the C2 segment of the root canal, deviation of the axis of the root canal from the original axis, failure of the root canal file, etc. problems, to achieve the effect of improving the safety of use, high-efficiency shaping, and good compliance

Active Publication Date: 2017-10-13
SHENZHEN SUPERLINE TECH
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AI Technical Summary

Problems solved by technology

If the martensite M-phase segment is too long, although the fatigue life of the front segment of the root canal file is improved and the risk of root canal side penetration is reduced, the cutting efficiency of the C2 segment of the root canal is very low, and there is also martensite The axial distortion of the M-phase segment leads to the risk

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

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0034] In the published literature of nickel-titanium alloy root canal files, the superelastic properties of the austenite A phase of the nickel-titanium alloy and the shape memory properties of the martensite M phase are mainly used to improve the practicability of the root canal file and security purposes.

[0035] In fact, the R phase in nickel-titanium alloy also has very excellent properties. As mentioned above, when the structure of nickel-titanium alloy is R phase, it can provide about 1% plastic deformation strain, and continuous deformation can provide about 5% superelastic strain. This superelasticity comes from the R phase and horse The stress-induced phase transformation between the tenite M phases, the superelastic deformation resistance produced by R→M and the superelastic deformation resistance produced by A→M are much sma...

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Abstract

The invention provides a nickel titanium alloy gradient flexible root canal file, which consists of a root canal file tip part, a root canal file middle part and a root canal file root part divided by the axis of a nickel titanium alloy gradient flexible root canal. The internal tissue of the root canal file tip part is a martensite M phase, the root canal file middle part is an R phase, and the root canal file root part is an austenite A phase. The invention also provides a making method of the nickel titanium alloy gradient flexible root canal file. The nickel titanium alloy gradient flexible root canal file provided by the invention effectively improves the use safety.

Description

technical field [0001] The invention relates to a dental instrument, in particular to a nickel-titanium alloy gradient flexible root canal file in the dental instrument and a manufacturing method thereof. Background technique [0002] As the main dental instrument, the root canal file is used to thoroughly clean the inside of the diseased root canal and the wall of the root canal, remove the diseased tissue, and create a complete and smooth root canal cavity. [0003] The working part of the root canal file has a certain cross-sectional shape, the outer contour has a certain taper, and there are helical cutting edges distributed on it, such as figure 1 . [0004] When the root canal file instrument is working, it rotates in the root canal 1 at a certain speed to cut the inner surface of the root canal to achieve the purpose of cleaning and shaping the root canal, such as figure 2 . The root canal generally has a curved inverted cone-shaped structure. According to the str...

Claims

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Application Information

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IPC IPC(8): A61C5/42C22F1/10A61L31/02A61L31/14
CPCA61L31/022A61L31/14A61C5/42C22F1/10A61C2201/007A61C5/40A61C2201/00
Inventor 王中周劲送
Owner SHENZHEN SUPERLINE TECH
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