To retrieve the abutment, an envelop incision will be made (Fig.8) with elevation of the buccal flap for the best visibility.  Prepare abutment removing drivers (x3) and try in vitro prior to surgery. 

Segmental Osteotomy

Xin Wei, DDS, PhD, MS 1st edition 02/28/2015, last revision 03/01/2015