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
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[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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