“…7,10 The main postoperative complications of sinus augmentation are protrusion of grafting materials into the sinus cavity followed by the perforation of Schneiderian membrane, formation of oroantral communication followed by wound dehiscence, displacement of the implant into the sinus due to the lack of primary stability, acute or chronic maxillary sinusitis, bone sequestration, and hematomas. 7,14,15 Perforation of the sinus membrane might happen due to overfilling of the created space, especially with sharp-angled grafting materials.…”