The 2nd stage of the upper arch implant placement consists of #5, 6, 8 and 9 (Fig.1).  The sites of osteotomy is initiated through the surgical stent with 1.2 mm initial drill.  Do not change mesiodistal position of the osteotomy, even though one or two areas are not wide buccopalatally.  Ridge split and bone expansion will be conducted.  Mesiodistal alteration may affect tooth alignment (Fig.6).

Initial Osteotomy Through Stent

Xin Wei, DDS, PhD, MS 1st edition 07/15/2016, last revision 07/16/2016