After extraction, buccal plate perforation is found apical to the distobuccal socket.  The septum is large (Fig.2 S).  Osteotomy is initiated in the middle of the septum with 1.6 mm drill until 3.8 mm Magic Drill (MD) (Fig.3).

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Xin Wei, DDS, PhD, MS 1st edition 11/15/2016, last revision 06/03/2018