Transition temperature range of thermally activated nickel-titanium archwires

Transition temperature range of thermally activated nickel-titanium archwires

Objectives: The shape memory resulting from the superelasticity and thermoelastic effect is the main characteristic of thermally activated NiTi archwires and is closely related to the transition temperature range (TTR). The aim of this study was to evaluate the TTR of thermally activated NiTi archwires commercially available. Material and Methods: Seven different brands of 0.019"x0.025" thermally activated nickel-titanium archwires were tested as received by differential scanning calorimetry (DSC) over the temperature range from -100°C to 150°C at 10°C/min. Results: All thermally activated NiTi archwires analyzed presented stage transformation during thermal scanning with final austenitic temperature (Af) ranging from 20.39°C to 45.42°C. Three brands of NiTi archwires presented Af close to the room temperature and, this way, do not present properties of shape memory and pseudoelasticity that are desirable in clinical applications. Conclusions: The thermally activated NiTi archwires present great variability in the TTR and the elastic parameters of each NiTi archwire should be provided by the manufacturers, to allow achievement of the best clinical performance possible.

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Main Authors: SPINI,Tatiana Sobottka, VALARELLI,Fabrício Pinelli, CANÇADO,Rodrigo Hermont, FREITAS,Karina Maria Salvatore de, VILLARINHO,Denis Jardim
Format: Digital revista
Language:English
Published: Faculdade De Odontologia De Bauru - USP 2014
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572014000200109
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spelling oai:scielo:S1678-775720140002001092014-03-31Transition temperature range of thermally activated nickel-titanium archwiresSPINI,Tatiana SobottkaVALARELLI,Fabrício PinelliCANÇADO,Rodrigo HermontFREITAS,Karina Maria Salvatore deVILLARINHO,Denis Jardim Differential thermal analysis Orthodontic wires Materials testing. Nickel Titanium Objectives: The shape memory resulting from the superelasticity and thermoelastic effect is the main characteristic of thermally activated NiTi archwires and is closely related to the transition temperature range (TTR). The aim of this study was to evaluate the TTR of thermally activated NiTi archwires commercially available. Material and Methods: Seven different brands of 0.019"x0.025" thermally activated nickel-titanium archwires were tested as received by differential scanning calorimetry (DSC) over the temperature range from -100°C to 150°C at 10°C/min. Results: All thermally activated NiTi archwires analyzed presented stage transformation during thermal scanning with final austenitic temperature (Af) ranging from 20.39°C to 45.42°C. Three brands of NiTi archwires presented Af close to the room temperature and, this way, do not present properties of shape memory and pseudoelasticity that are desirable in clinical applications. Conclusions: The thermally activated NiTi archwires present great variability in the TTR and the elastic parameters of each NiTi archwire should be provided by the manufacturers, to allow achievement of the best clinical performance possible. info:eu-repo/semantics/openAccessFaculdade De Odontologia De Bauru - USPJournal of Applied Oral Science v.22 n.2 20142014-04-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572014000200109en10.1590/1678-775720130133
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
tag revista
region America del Sur
libraryname SciELO
language English
format Digital
author SPINI,Tatiana Sobottka
VALARELLI,Fabrício Pinelli
CANÇADO,Rodrigo Hermont
FREITAS,Karina Maria Salvatore de
VILLARINHO,Denis Jardim
spellingShingle SPINI,Tatiana Sobottka
VALARELLI,Fabrício Pinelli
CANÇADO,Rodrigo Hermont
FREITAS,Karina Maria Salvatore de
VILLARINHO,Denis Jardim
Transition temperature range of thermally activated nickel-titanium archwires
author_facet SPINI,Tatiana Sobottka
VALARELLI,Fabrício Pinelli
CANÇADO,Rodrigo Hermont
FREITAS,Karina Maria Salvatore de
VILLARINHO,Denis Jardim
author_sort SPINI,Tatiana Sobottka
title Transition temperature range of thermally activated nickel-titanium archwires
title_short Transition temperature range of thermally activated nickel-titanium archwires
title_full Transition temperature range of thermally activated nickel-titanium archwires
title_fullStr Transition temperature range of thermally activated nickel-titanium archwires
title_full_unstemmed Transition temperature range of thermally activated nickel-titanium archwires
title_sort transition temperature range of thermally activated nickel-titanium archwires
description Objectives: The shape memory resulting from the superelasticity and thermoelastic effect is the main characteristic of thermally activated NiTi archwires and is closely related to the transition temperature range (TTR). The aim of this study was to evaluate the TTR of thermally activated NiTi archwires commercially available. Material and Methods: Seven different brands of 0.019"x0.025" thermally activated nickel-titanium archwires were tested as received by differential scanning calorimetry (DSC) over the temperature range from -100°C to 150°C at 10°C/min. Results: All thermally activated NiTi archwires analyzed presented stage transformation during thermal scanning with final austenitic temperature (Af) ranging from 20.39°C to 45.42°C. Three brands of NiTi archwires presented Af close to the room temperature and, this way, do not present properties of shape memory and pseudoelasticity that are desirable in clinical applications. Conclusions: The thermally activated NiTi archwires present great variability in the TTR and the elastic parameters of each NiTi archwire should be provided by the manufacturers, to allow achievement of the best clinical performance possible.
publisher Faculdade De Odontologia De Bauru - USP
publishDate 2014
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572014000200109
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