title: [Physical principles of choosing orthodontic arches].
abstract: Physical principles underlying the choice of elastic arches for first stages of orthodontic treatment by means of edgewise technique are presented and clinical potentialities of superelastic nickel-titanium arches are discussed. Elastic properties of nickel-titanium arches available in Russia are reviewed. Using a previously proposed method, forces developed by strongly bent nickel-titanium arches in the oral cavity are estimated. The results are summed up in tables convenient for practical orthodontists. Based on estimations, a strategy of choice of orthodontic arches for first stages of treatment is proposed.
authors.forename: S E
authors.initials: SE
authors.lastname: Murav'ev
authors.forename: G B
authors.initials: GB
authors.lastname: Ospanova
authors.forename: M Iu
authors.initials: MIu
authors.lastname: Shliakhova
mesh_terms: D003799:Dental Stress Analysis; D004548:Elasticity; D006801:Humans; D008422:Materials Testing; D009532:Nickel; D009969:Orthodontic Wires; D013718:Tensile Strength; D013997:Time Factors; D014025:Titanium
chemical_list: C040654:titanium nickelide; D009532:Nickel; D014025:Titanium