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Mechanical properties of a new thermoplastic polymer orthodontic archwire
Varela, Juan Carlos; Velo, Marcos; Espinar Escalona, Eduardo; Llamas Carreras, Jose Maria; Rupérez de Gracia, Elisa; Manero Planella, José María; Gil Mur, Francisco Javier
Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. CDAL - Centre de Disseny d'Aliatges Lleugers i Tractaments de Superfície; Universitat Politècnica de Catalunya. BIBITE - Biomaterials, Biomecànica i Enginyeria de Teixits
A new thermoplastic polymer for orthodontic applications was obtained and extruded into wires with round and rectangular cross sections. We evaluated the potential of new aesthetic archwire: tensile, three point bending, friction and stress relaxation behaviour, and formability characteristics were assessed. Stresses delivered were generally slightly lower than typical beta-titanium and nickel-titanium archwires. The polymer wire has good instantaneous mechanical properties; tensile stress decayed about 2% over 2 h depending on the initial stress relaxation for up to 120 h. High formability allowed shape bending similar to that associated with stainless steel wires. The friction coefficients were lower than the metallic conventional archwires improving the slipping with the brackets. This new polymer could be a good candidate for aesthetic orthodontic archwires.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers
Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials::Assaigs mecànics
Thermoplastics
Orthodontics, Corrective
Polymers in medicine
Polymers--Mechanical properties
Polymer archwire
Orthodontic applications
Mechanical properties
Friction
Ortodòncia
Odontologia -- Aparells i instruments
Polímers -- Propietats mecàniques
Polímers en medicina
Termoplàstics -- Proves
info:eu-repo/semantics/publishedVersion
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