title: [Orthodontic wires in a simulated oral environment:change in mechanical properties]
abstract: In this study,some different kinds of orthodontic archwires were tested to evaluate the changes of their mechanical properties.The results showed that in oral environment,all wires suffered degradation of their properties:the force-generating capacity decreased and the permanent deformation increased.The force-generating capacity decreased and the permanent deformation increased.The force decay resulted mainly from the tooth movement.The deformation occurred within 7 days.Chinese-NiTi alloy suffered less stress-relaxation and residual deformation than the stainless steel wires.Arch wires with vertical loops showed similar properties with NiTi,which could deliver more constant force.
authors.affiliation: Department of Orthodontic, Ninth People's Hospital, School of Stomatology,Shanghai Second Medical University. Shanghai 200011, China.
authors.forename: G H
authors.initials: GH
authors.lastname: Tang
authors.forename: K
authors.initials: K
authors.lastname: Liu
authors.forename: H J
authors.initials: HJ
authors.lastname: Cao
authors.forename: J
authors.initials: J
authors.lastname: Lu
authors.forename: C W
authors.initials: CW
authors.lastname: Zhang