After placing PRF membrane and Vanilla graft for sinus lift (Fig.13 *), a 4.5x10 mm definitive implant is placed with loss of control in the trajectory (Fig.12,13).  * in Fig.12: bone graft around the implant.  Because of hemorrhage, deep position and block of the bone graft for sinus lift, it is difficult to control the entry of the final implant.  The latter obviously slips into the original osteotomy.  An angled abutment may be needed to correct the trajectory.

When the initial osteotomy is off substantially (Fig.4), an osteotomy should be established de novo and as early as possible (Fig.14) so that subsequent osteotomy will not relapse to a great extent.

Trajectory Last Next Xin Wei, DDS, PhD, MS 1st edition 08/27/2018, last revision 08/28/2018