The reverse curve or anti Spee curve is an arch that has been amply used in orthodontics for Spee curve leveling in deep bite patients. Generally, the presence of a deep spee curve is derived from the extrusion of the anterior
sector; this happens when the inferior incisors, during their eruptive phase, do not find their antagonist and erupt
until they contact the palatine mucosa; for this reason, the anterosuperior sector elongates inducing a deep bite.
With the development of alloys, super elastic arches appeared in the form of a reverse curve or anti Spee curves
(NiTi or TMA), round and rectangular (each one with advantages and disadvantages).