Characterization of the file-specific heat-treated ProTaper Ultimate rotary system.

Jorge N R Martins,Emmanuel João Nogueira Leal Silva,Duarte Marques,Natasha Ajuz,Mário Rito Pereira,Rui Pereira da Costa,Francisco Manuel Braz Fernandes,Marco Aurélio Versiani

International endodontic journal（2023）

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摘要

The PT Ultimate system comprises instruments with 3 distinct heat treatments that showed similar phase transformation temperatures to their heat-treated analogues. PT Ultimate instruments presented lower torsional strength and superior flexibility than their counterparts, whilst maximum torque, angle of rotation and bending loads progressively increased with their sizes.

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关键词

bending load,differential scanning calorimetry,endodontics,nickel-titanium alloy,scanning electron microscope,torsional strength

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