The Mushroom Spring Aligner is a common choice for finishing movements following debonding. The Spring Aligner contains a mushroom-shaped spring lingual to the anteriors, and can make minor corrections in misaligned teeth. Following final movements, the Mushroom Spring Aligner can function as a standard hawley. Available on the upper or lower arch; counter model strongly recommended. This appliance is commonly used on the lower arch because of its superior strength over the standard spring aligner.