title: [The Top Wire Appliance bracket: tooth movement and friction].
abstract: The TWA (Top Wire Appliance) bracket enables a vertical insertion of the rectangular orthodontic archwire. This updated biomechanical evolution of the TWA technique promotes corrections during the first therapeutic stages of a fixed treatment. This bracket has been designed to take full advantage of the properties of shape memory archwires, reducing chairtime and making deep bite correction easier, dental rotations, alignment, leveling and stabilization, thanks to the rigidity of the vertically inserted arch, working heightwise. Progressive tightening ligature, adapted to the therapeutic sequence in progress is an element of biomechanics in TWA technique.
authors.affiliation: Drjjaknin@aol.com
authors.forename: J J
authors.initials: JJ
authors.lastname: Aknin
mesh_terms: D001696:Biomechanical Phenomena; D003722:Dental Alloys; D003799:Dental Stress Analysis; D004548:Elasticity; D017276:Friction; D006801:Humans; D008422:Materials Testing; D009532:Nickel; D016382:Orthodontic Appliance Design; D016910:Orthodontic Brackets; D009969:Orthodontic Wires; D013193:Stainless Steel; D014025:Titanium; D014087:Tooth Movement Techniques / Q000295:instrumentation*
chemical_list: D003722:Dental Alloys; C040654:titanium nickelide; D013193:Stainless Steel; D009532:Nickel; D014025:Titanium