Since shorter implants (14 mm) are going to be placed, larger implants are intentionally to be used.  The trajectory of the osteotomy using 5 mm drill at the site of #18 is within normal limit (using surgical stent).  When 6 mm drill is being used, it feels that the lingual plate has vibration apically.  So the surgical stent is not used; the trajectory leans lingually.  It may be too much.  After placement of the abutment, the problem is more obvious (Fig.6).

One Stage

Xin Wei, DDS, PhD, MS 1st edition 11/08/2014, last revision 11/09/2014