TADs PA are mini screws made specifically for palatal anchorage of expanders, distalizers or other orthodontic devices. The terminology itself indicates the most common intended use, which is palatal anchorage (PA = Palatal Anchorage). Made of medical grade 5 titanium, they can be used following two methods that are distinct from each other, both as protocols or conceptually. The integral TAD PA is inser ted into the palate after cementation of the device in the oral cavity, thus closing the operative protocol: this type of approach is called TAD last because the TAD is inserted as the last operative step. TADs PA Biphasic, on the other hand, are inserted into the palate before the actual design of the device and, very often, following a planning and subsequent guided surgery: this type of approach is called TAD first because the TAD is inserted as the first operative step followed by a conventional or digital impression and the device fabrication
