Following extraction of the two mesiodens, osteotomy starts with pilot drills (Fig.3: 8 (2x17 mm), 9 (1.5x20 mm)).  As planned, these pilot drills go through two of the cortical plates of the mesiodens' sockets (arrowheads) for engagement/primary stability.

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Xin Wei, DDS, PhD, MS 1st edition 02/03/2013, last revision 01/21/2019