<![CDATA[Rehabilitation of posterior maxilla is compromised by deficient residual bone height. Sinus lift procedure can be performed by either lateral or crestal approach. Crestal approach had many advantages in comparison with the lateral approach. Hydraulic pressure devices for sinus membrane elevation have demonstrated a low risk of sinus membrane perforation as well as ease of application. Endoscopic surgery has change the philosophy and practice of modern implant surgery in all aspects, it give rise to minimally invasive surgery procedures based on the ability to visualize sinus membrane perforation and to operate in an optimum manner. Assessing and evaluating the efficacy of osung sinus lift kit and the presence of maxillary sinus membrane perforation with the use of endoscopy, were the aim of this present study, thirty patients in rolled in this study with mean age of 46.86 years divided into 2 groups: group A (Osung) the hydraulic pressure technique and group B (osteotome) the conventional osteotome technique. For each patient, orthopantomography and cone beam computed tomography were recommended, an endoscope used intraoperatively in each case to assess the presence of shniedrian membrane perforation, 51.9% (27 cases) were managed by osung procedure for sinus lift, while 48.1% (25 cases) were managed by osteotome sinus lift, the perforation of sinus membrane occurred in (7.7%) in both groups. The use of endoscope is simple and quick for direct visualization of the Schneider membrane, maxillary sinus floor elevation using Osung water lift system kit is a predictable procedure with a low perforation rate. Keywords: Crestal approach, Endoscopy, Hydraulic pressure, Shniederian membrane perforation. Introduction]]>
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