Accuracy assessment procedure for infra-zygomatic and palatal bone screw placement: a radiation-free method

The objective of this clincal article is to describe a new method to assess the accuracy of extra-alveolar miniscrew placement with respect to the digital planning. This is a radiation-free method; thanks to a specially printed abutment, it is possible to obtain two .stl files: one with the digital planning of the miniscrew position and another of the miniscrew placed in the oral cavity. These two files are superimposed with Geomagic Control X Software to assess the discrepancy between the digitally planned and the actual position of the miniscrew. Keywords: skeletal anchorage, digital planning, radiation free, miniscrew placement, model superimposition