The entrance point of osteotomy should be lingual (Fig.2' red arrow). As the smallest pilot drill penetrates the cortex (Fig.2" black triangle), the trajectory should be changed using surgical stent (S) and a finger on the labial plate (yellow) as guides.  In this way it is easy to restore, since the abutment of the 2.5 mm 1 piece implant is straight (Fig.3).

1 Piece or Onlay Graft? Last Next Surgery

Xin Wei, DDS, PhD, MS 1st edition 11/27/2014, last revision 08/05/2018