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Figure 10b. Coronal diagrams of the maxillary sinus show the sinus lift procedure. (a) The bone flap (arrow) created by means of osteotomy is pushed inward with the maxillary sinus membrane (arrowheads) to create a space (S) that is packed with the bone graft material depicted in b. (b) Image shows the bone graft filling space created with the inward displacement the osteotomy and sinus membrane. (Reprinted, with permission, from reference 8.)