A lingual arch is a stainless steel wire that typically conforms closely to the lingual surface of the teeth and is secured by bands on the molars, bicuspids, or cuspids. There are various methods to attach lingual arch wires to the bands:

1: For basic space maintenance devices, the arch wire can be directly soldered to the bands.

2: If the arch wire includes adjustment loops or soldered lingual lap springs, it can be connected to the molar bands using horizontal or vertical lingual sheaths, facilitating easy removal and replacement for adjustments.