Mechanical properties of various esthetic and standard orthodontic wires in bending tests : An in vitro research Rectangular wires have the best flexibility during the thickness plane2; bending principle permits differentiation between the faciolingual and occlusoapical orientation responses of rectangular wires. The ribbon arch appliance was the first orthodontic appliance https://roundnitiwires58024.59bloggers.com/33298948/rectangular-niti-wires-secrets