Trans-Palatal Arch (TPA)

The Trans-Palatal Arch is used to hold upper molars in place, stabilizing the position of these teeth after, or during, the movement of other teeth. The trans-palatal arch can also be used to rotate molars into more ideal positions to improve the bite and to help the molars move as a unit when working together with orthodontic mini-implants.

The Trans-Palatal Arch is comprised of stainless steel rings (bands) around the posterior teeth (usually molars) and a looped wire that spans the palate (roof of the mouth) without touching it.