To have thicker buccal bone, the 5 mm implants at #18 (Fig.2) and 19 (Fig.3) seem to be a little large.  Smaller (4.5 mm) will be more appropriate so that the coronal threads of the implant at #18 will be more securely covered by the regenerating bone. 

Smaller Implants Last Next

Xin Wei, DDS, PhD, MS 1st edition 07/01/2019, last revision 07/27/2019