A 4.5 mm tap is stable (Fig.2 T). Note the coronal radiolucency (gap).
A 4.5x14 mm tissue-level implant (Fig.4 I) is placed with insertion torque > 60 Ncm. A: 3.5x3 mm abutment; *: bone graft in the gap.
Three months postop, the amount of bone graft is reduced (Fig.13 *, as compared to Fig.4), while the gap re-appears (as compared to Fig.3). The latter suggests failure of regeneration of the buccal plate.
Xin Wei, DDS, PhD, MS 1st edition 05/29/2015, last revision 09/02/2015