case_images: PMC5502497_01
case_images: Periapical X-ray with gutta-percha through the sinus
case_images: AMS-7-117-g001.jpg
case_images: PMC5502497_01_AMS-7-117-g001.jpg
case_images: F1
case_images: A waters' view radiography was taken and another periapical X-ray, with a cone of gutta-percha inserted gently in the extraction site, was also taken to confirm the diagnosis [Figure 1].
case_images: Separating the platelet-rich fibrin
case_images: AMS-7-117-g002.jpg
case_images: PMC5502497_01_AMS-7-117-g002.jpg
case_images: F2
case_images: The fibrin clot was separated easily and one-third was cut off and inserted gently into the extraction socket [Figure 2].
case_images: Forming platelet-rich fibrin membrane
case_images: AMS-7-117-g003.jpg
case_images: PMC5502497_01_AMS-7-117-g003.jpg
case_images: F3
case_images: The remaining two-third of the clot was pressed gently with sterile dry gauze to drive out the fluids and forming the membrane [Figure 3].
case_images: Suturing of the platelet-rich fibrin membrane
case_images: AMS-7-117-g004.jpg
case_images: PMC5502497_01_AMS-7-117-g004.jpg
case_images: F4
case_images: The extraction site was covered with the membrane which was sutured to the gingival margins with two suture knots using 4/0 silk nonresorbable sutures [Figure 4].
case_images: Eight weeks after oroantral communication closure
case_images: AMS-7-117-g005.jpg
case_images: PMC5502497_01_AMS-7-117-g005.jpg
case_images: F5
case_images: There was no inflammatory reaction, signs, or symptoms of maxillary sinusitis, and the healing process was obviously clear [Figure 5].