Datorita finetii sarmei, arcurile rotunde sunt utilizate in mod normal devreme in tratament pentru a alinia dintii. Firele multi-strand aplica o forta scazuta pentru deformare minora sau moderata in functie de severitatea malocluziei.
Arcurile rectangulare sunt utilizate in mod obisnuit tranzitoriu pentru a alinia ocluziile in mod eficient, cu o forta comparativ mai mica decat arcurile solide din otel inoxidabil.

Thanks to the fineness of the wire, round arches are normally used early in treatment to align the teeth. Multi-strand wires apply a low force for minor or moderate deformation depending on the severity of the malocclusion.
Rectangular wires are commonly used transiently to align occlusions effectively, with comparatively less force than solid stainless steel wires.