Minimally invasive maxillary sinus augmentation with simultaneous implantation on an elderly patient: A case report

Figure 2 First-stage surgery. A and B: Nest preparation on the right; C and D: Bilateral internal maxillary sinus floor elevation; E: Platelet-rich fibrin (PRF) clots were compressed between sterile dry gauze; F and G: Established PRF membranes were placed in the primary elevated sinus floor; H and I: Implantation of the bovine bone graft material; J: Implant (4.3 mm × 10 mm, Nobel Active, Sweden) was implanted with a torque of 35 N·cm; K and L: Placement of a suitable cover screw; M: Stitches in the wound.