Fig. 1

Various types of palatal plates used in these patients: a classical Tübingen palatal plate; b modified plate with a ring or c a tube attached to the extension; d modified plate with a tube that has an extra-oral extension
Various types of palatal plates used in these patients: a classical Tübingen palatal plate; b modified plate with a ring or c a tube attached to the extension; d modified plate with a tube that has an extra-oral extension