Characterization of the file-specific heat-treated ProTaper Ultimate rotary system.
Jorge N R MartinsEmmanuel João Nogueira Leal da SilvaDuarte MarquesNatasha AjuzMário Rito PereiraRui Pereira da CostaFrancisco Manuel Braz FernandesMarco Aurélio VersianiPublished in: International endodontic journal (2022)
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.