Nickel titanium rotary file

<p>A nickel titanium rotary file is an engine-driven tapered and pointed <a href="/facts/Endodontic/7TaR5vV3">endodontic</a> instrument made of <a href="/facts/Nickel_titanium/0qoDhI0w">nickel titanium</a> alloy with cutting edges used to mechanically shape and prepare the root canals during <a href="/facts/Endodontic_therapy/EskobL5z">endodontic therapy</a> or to remove the root canal obturating material while performing retreatment. The first nickel titanium rotary file was introduced to the market in 1991. <a href="/facts/Superelasticity/yA6cNzIz">Superelasticity</a> and <a href="/facts/Shape_memory/dWInaJpt">shape memory</a> are the properties that make nickel titanium rotary files very flexible. The high flexibility makes them superior to <a href="/facts/Stainless_steel/IDdo8bEx">stainless steel</a> files for the purpose of rotary <a href="/facts/Root_canal/TXrHPRVf">root canal</a> preparation. The use of nickel titanium rotary files in dentistry is a common practice.
</p><p>Nickel–titanium (<a href="/facts/NiTi/0qoDhI0w">NiTi</a>) show the phenomenon of <a href="/facts/Superelasticity/yA6cNzIz">superelasticity</a> where the <a href="/facts/Stress_(mechanics)/ErAXDbbd">stress</a> remains constant, despite the increase in strain up till a certain range. Their superelastic property is caused by the <a href="/facts/Austenite/Fzp52xYc">austenite</a> transforming into the <a href="/facts/Martensite/xpSt9mna">martensite</a> form. The strain remains constant during this transformation until the whole NiTi mass has converted to the martensite form, which would indicate that the superelasticity phase has ended.
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Nickel titanium rotary file open-in-new

Nickel titanium rotary file