Fig. 2From: Efficacy of stem cell allograft in maxillary sinus bone regeneration: a randomized controlled clinical and blinded histomorphometric studya Full-thickness flap reflected to access the lateral sinus wall. b Lateral window created. c Schneiderian membrane completely elevated to medial expose the medial wall. d Test sinus filled with Osteocel Plus allograft material. e Collagen resorbable membrane covers the window and stabilized with 2 tacks one anteriorly and the other one posteriorlyBack to article page