About: Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice     Goto   Sponge   NotDistinct   Permalink

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  • Introduction: The aim was to study nickel-titanium closed-coil springs in a clinically relevant test setting with respect to the accuracy of the %22preactivation%22 for nickel-titanium closed-coil springs application and whether it is possible to keep activation forces constant during the whole time of treatment. Methods: We tested 10 types of springs from 5 manufacturers under clinically relevant conditions, allowing us to study the interactions between load and temperature over time. Hystereses were compared using t tests. Results: Springs with a large mechanical hysteresis also showed a large thermal hysteresis. After heating shock, these springs showed intensive force spikes and persistent high loads. Some springs showed negligible thermal and mechanical hysteresis. Such springs never showed any clinically significant persistent high loads. Conclusions: Springs with a large hysteresis were unable to keep activation forces constant during the whole time of treatment even after any pre-activation, and they might cause persistently high loads and possibly overloading. Only springs with minor hysteresis, low temperature dependence of force, and a clinically useful plateau have the following clinical advantages: reduced chair time, optimal rates of tooth movement, reproducible clinical results, and conservation of anchorage.
  • Introduction: The aim was to study nickel-titanium closed-coil springs in a clinically relevant test setting with respect to the accuracy of the %22preactivation%22 for nickel-titanium closed-coil springs application and whether it is possible to keep activation forces constant during the whole time of treatment. Methods: We tested 10 types of springs from 5 manufacturers under clinically relevant conditions, allowing us to study the interactions between load and temperature over time. Hystereses were compared using t tests. Results: Springs with a large mechanical hysteresis also showed a large thermal hysteresis. After heating shock, these springs showed intensive force spikes and persistent high loads. Some springs showed negligible thermal and mechanical hysteresis. Such springs never showed any clinically significant persistent high loads. Conclusions: Springs with a large hysteresis were unable to keep activation forces constant during the whole time of treatment even after any pre-activation, and they might cause persistently high loads and possibly overloading. Only springs with minor hysteresis, low temperature dependence of force, and a clinically useful plateau have the following clinical advantages: reduced chair time, optimal rates of tooth movement, reproducible clinical results, and conservation of anchorage. (en)
Title
  • Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice
  • Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice (en)
skos:prefLabel
  • Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice
  • Thermomechanical properties of nickel-titanium closed-coil springs and their implications for clinical practice (en)
skos:notation
  • RIV/00216208:11150/14:10283992!RIV15-MSM-11150___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
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http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 50416
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11150/14:10283992
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • wires; alloy; forces; niti; archwires; mechanical-behavior; temperature-changes (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [DA78E9723BA8]
http://linked.open...i/riv/nazevZdroje
  • American Journal of Orthodontics and Dentofacial Orthopedics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 146
http://linked.open...iv/tvurceVysledku
  • Hanuš, Josef
  • Záhora, Jiří
  • Selke - Krulichová, Iva
  • Bezrouk, Aleš
  • Balský, Libor
  • Smutný, Martin
  • Meling, Torstein R.
http://linked.open...ain/vavai/riv/wos
  • 000341305800010
issn
  • 0889-5406
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.ajodo.2014.05.025
http://localhost/t...ganizacniJednotka
  • 11150
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