When the patient arrives at the office for sinus graft, the most important thing for her is to have two provisionals in the premolar region postop (Fig.1: #4,5; >: suture left from previous surgery).  These existing provisionals appear to interfere with sinus lateral window incision and removed.  So is the mini-implant. 

Multiple Adjacent Multiple Provisionals

Xin Wei, DDS, PhD, MS 1st edition 06/20/2015, last revision 06/20/2015