Fig.4 shows a ball abutment (A) is inserted to a 4.5x17 mm tapered implant at the site of the tooth #27.  In fact, the one piece implant (O) at the site of #26 deviates distally.  S stands for the original socket.

Incision can increase visibility so that the osteotomy at the site of the lateral incisor may be more precise with a change in the trajectory (arrows).

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Xin Wei, DDS, PhD, MS 1st edition 06/29/2013, last revision 06/29/2014