Use of an upper reverse curve and a lower curve

This type of wire is very useful for space closure in the anterior segment. We just have to place a reverse curve

on the upper maxilla and in the lower maxilla we place a curved wire. This will provoke an extrusion and a palatal

movement of the upper and lower incisors.(ls.21.3o.37)

We generally use round 0.020"or 0.01Tx 0.025" rectangular wire NiTi or TMA.