The gap of the split ridge between #12 (Fig.5*) and 14 increases when bone expanders (until 2.7/3.6 mm) are being inserted.  A 4.5x17 mm implant does not obtain primary stability at #12.  When a 5x17 mm implant is being placed at #12, the buccal plate starts to crack.  When the same implant is placed at #14, the crack appears to get larger.  Drills are used to finish osteotomy at #14 with force being applied palatally.  When the implant is re-inserted, the buccal plate fractures does not appears to get worse (<).

Fracture & Ridge Split Last Next

Xin Wei, DDS, PhD, MS 1st edition 12/14/2015, last revision 06/25/2017