A transpalatal bar is a stainless steel wire with a U loop in the middle which traverses your palate. Normally the first molar teeth are rotated inwards taking up valuable space and cause a narrowing of the dental arch. Correcting this rotation with a transpalatal bar gives extra space useful in the correction of crowding, may correct a crossbite and produces a wider arch giving a wider smile.
Transpalatal bars can also maintain space while we wait for permanent teeth to erupt. Palatal bars are not removable. Patients should clean carefully around them. The bar may irritate or mark the tongue for a few days. Wax and mild analgesics usually rectify this.