When the osteotomy is being established at #7, the buccal apical plate is almost perforated (Fig.2).  Eventually, the abutment of 2.5x12 mm 1-piece implant (Fig.3,4) is buccally displaced.  To reduce buccal thread exposure, the implant at #8 (3.8x16 mm) is placed as deep as possible; its apex is close the nasal floor (Fig.4 arrowheads).

Difficult Extraction Last Next  Xin Wei, DDS, PhD, MS 1st edition 12/09/2016, last revision 02/19/2021