The septum of the socket is thin (Fig.3*), and easily removed, leaving a large socket.  Osteotomy is initiated with 2 mm pilot drill in the middle of the socket, slightly mesiolingual, since the buccal and distal bone is low and defective.

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Xin Wei, DDS, PhD, MS 1st edition 01/28/2013, last revision 01/19/2018