Figure 2: (a) Infracture of bony window, perforation of sinus membrane encountered during membrane elevation, (b) Implant osteotomy sites prepared in 25, 26 and 27, (c) Type I collagen membrane (BioMend Extend®) placed to repair the perforated sinus membrane, (d) Sinus cavity partially packed with deproteinized bovine bone (Bio-oss®)