The extraction sockets at the sites of #20 and 21 are bone grafted (mixture of autogenous bone and allograft, Fig.2 *).  Taps (T) are inserted at #22 (5x17 mm) and 27 (4.5x17 mm).  A 3.5x17 mm drill and 2.5 mm reamer are kept in place for intraop panoramic X-ray.

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Xin Wei, DDS, PhD, MS 1st edition 04/04/2013, last revision 04/04/2014