Open-Bite Correction Using a Mid-Palatal TAD with an Intrusion TPA: Anteroposterior Position of TAD

Mechanics using a mid-palatal temporary anchorage device (TAD) and an intrusion transpalatal arch (TPA) were applied to correct the open bites. Two different patterns could be obtained according anteroposterior position of TADs. When TAD was placed posterior first molar, teeth intruded (“posterior intrusion”), bite corrected efficiently. This is commonly used in most However, sometimes, with gummy smile, maxillary anterior teeth, as well may necessary. In this case, “total intrusion” obtained, including intrusion. conclusion, pattern differs depending on anterior–posterior TAD, necessitating or Total