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

2023-04Artigo científico Acesso aberto
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dc.contributor.authorMartins, Jorge N. R.
dc.contributor.authorSilva, Emmanuel João Nogueira Leal
dc.contributor.authorMarques, Duarte
dc.contributor.authorAjuz, Natasha
dc.contributor.authorRito Pereira, Mário
dc.contributor.authorPereira da Costa, Rui
dc.contributor.authorBraz Fernandes, Francisco Manuel
dc.contributor.authorVersiani, Marco Aurélio
dc.contributor.institutionDCM - Departamento de Ciência dos Materiais
dc.contributor.institutionCENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)
dc.contributor.pblWiley-Blackwell Publishing Ltd
dc.date.accessioned2023-02-15T22:22:20Z
dc.date.available2023-02-15T22:22:20Z
dc.date.issued2023-04
dc.descriptionFunding Information: FMBF acknowledges the funding of CENIMAT/i3N by national funds through the FCT‐Fundação para a Ciência e a Tecnologia, I.P., within the scope of Multiannual Financing of R&D Units, reference UIDB/50025/2020‐2023. Publisher Copyright: © 2022 The Authors. International Endodontic Journal published by John Wiley & Sons Ltd on behalf of British Endodontic Society.
dc.description.abstractAim: To compare design, metallurgy and mechanical performance of the ProTaper (PT) Ultimate system with instruments of similar dimensions from the ProGlider, PT Gold and PT Universal systems. Methodology: New PT Ultimate instruments (n = 248) were compared with instruments of similar dimensions from ProGlider (n = 31), PT Gold (n = 155) and PT Universal (n = 155) systems regarding their number of spirals, helical angle, blade symmetry, tip geometry, surface finishing, nickel/titanium ratio, phase transformation temperatures and mechanical performance. One-way anova and nonparametric Mood's median tests were used for statistical comparison (α = 5%). Results: All instruments had symmetrical blades without radial lands or flat sides, similar surface finishing and an almost equiatomic nickel/titanium ratio, whilst the number of spirals, helical angles and the tip geometry were different. PT Ultimate instruments showed 3 distinct heat treatments that matched with the colour of their metal wire. Slider and ProGlider instruments had similar R-phase start (Rs) and R-phase finish (Rf) temperatures. SX, F1, F2, F3 and Shaper instruments showed equivalent heat treatments (Rs ~45.6°C and Rf ~28.3°C) that were similar to their PT Gold counterparts (Rs ~47.9°C and Rf ~28.2°C), but completely distinct to the PT Universal ones (Rs ~16.2°C and Rf ~−18.2°C). Amongst the PT Ultimate instruments, the lowest maximum torques were observed in the SX (0.44 N cm), Slider (0.45 N cm) and Shaper (0.60 N cm) instruments, whilst the highest was noted in the FXL (4.90 N cm). PT Ultimate Slider and ProGlider had similar torsional (~0.40 N cm) and bending loads (~145.0 gf) (p = 1.000), whilst the other PT Ultimate instruments showed statistically significantly lower maximum torque, higher angle of rotation and lower bending load (higher flexibility) than their counterparts of the PT Universal and PT Gold systems. Conclusions: 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.en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent13
dc.format.extent4312073
dc.identifier.doi10.1111/iej.13880
dc.identifier.issn0143-2885
dc.identifier.otherPURE: 53316393
dc.identifier.otherPURE UUID: 98eccee5-b7f4-4f99-b426-bda980a6d20f
dc.identifier.otherScopus: 85144883083
dc.identifier.otherWOS: 000899842600001
dc.identifier.otherPubMed: 36508297
dc.identifier.otherORCID: /0000-0003-3185-0019/work/128879381
dc.identifier.urihttp://hdl.handle.net/10362/149296
dc.identifier.urlhttps://www.scopus.com/pages/publications/85144883083
dc.language.isoeng
dc.peerreviewedyes
dc.subjectbending load
dc.subjectdifferential scanning calorimetry
dc.subjectendodontics
dc.subjectnickel-titanium alloy
dc.subjectscanning electron microscope
dc.subjecttorsional strength
dc.subjectGeneral Dentistry
dc.titleCharacterization of the file-specific heat-treated ProTaper Ultimate rotary systemen
dc.typejournal article
degois.publication.firstPage530
degois.publication.issue4
degois.publication.lastPage542
degois.publication.titleInternational Endodontic Journal
degois.publication.volume56
dspace.entity.typePublication
rcaap.rightsopenAccess

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