Fig. 5
From: Crestal endoscopic approach for evaluating sinus membrane elevation technique

Endoscopic view from the crestal osteotomy site showing perforation of the sinus lining under the power of magnification and illumination of the endoscope
From: Crestal endoscopic approach for evaluating sinus membrane elevation technique
Endoscopic view from the crestal osteotomy site showing perforation of the sinus lining under the power of magnification and illumination of the endoscope